Article
Astronomy & Astrophysics
Anowar J. Shajib, Tommaso Treu, Simon Birrer, Alessandro Sonnenfeld
Summary: By utilizing a joint lensing-dynamics analysis, the study investigates the internal structure of elliptical galaxies at a redshift of z≈0.2, revealing that dark matter haloes are well described by a standard Navarro-Frenk-White halo. Additionally, comparison of inferred stellar masses with those obtained from the stellar population synthesis method supports a heavy initial mass function (IMF) such as the Salpeter IMF.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Alessandro Sonnenfeld, Crescenzo Tortora, Henk Hoekstra, Marika Asgari, Maciej Bilicki, Catherine Heymans, Hendrik Hildebrandt, Konrad Kuijken, Nicola R. Napolitano, Nivya Roy, Edwin Valentijn, Angus H. Wright
Summary: Using weak gravitational lensing observations, this study investigates the relationship between the dark matter halo mass and the properties of massive elliptical galaxies. The results show that there is no significant correlation between the halo mass and the half-light radius or colour of the galaxies, indicating that the average star formation efficiency of these galaxies is not dependent on their final size or colour. This suggests that the diversity in the size and colour distribution of massive elliptical galaxies may be attributed to other factors.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
H. Wang, R. Canameras, G. B. Caminha, S. H. Suyu, A. Yildirim, G. Chirivi, L. Christensen, C. Grillo, S. Schuldt
Summary: We study the inner structure of the group-scale lens CASSOWARY 31 by adopting both strong lensing and dynamical modeling. Our results show that CSWA 31 is a peculiar fossil group, strongly dark-matter dominated toward the central region, and with a projected total mass profile similar to higher-mass cluster-scale halos.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Fabrizio Gentile, Crescenzo Tortora, Giovanni Covone, Leon V. E. Koopmans, Chiara Spiniello, Zuhui Fan, Rui Li, Dezi Liu, Nicola R. Napolitano, Mattia Vaccari, Liping Fu
Summary: The authors identified 16 likely strong gravitational lenses using CNNs on data from the VOICE survey, with two different CNNs trained on composite images to accurately identify systems with different Einstein radii. The high-confidence lens candidate sample was visually inspected by nine of the authors, with roughly 75% of the systems classified as likely lenses. This work confirms the effectiveness of CNNs in inspecting large samples of galaxies for gravitational lenses, which will be crucial for future surveys with the Euclid satellite and the Vera Rubin Observatory.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Claudio Mastromarino, Giulia Despali, Lauro Moscardini, Andrew Robertson, Massimo Meneghetti, Matteo Maturi
Summary: We tested the differences between cold dark matter (CDM) and self-interacting dark matter (SIDM) models in the mass range of massive galaxies using hydrodynamic cosmological simulations. The inclusion of baryons erased the differences between SIDM and CDM density profiles observed in the dark-matter-only case. We also found that the distributions of strong lensing Einstein radii derived from CDM and SIDM simulations were comparable to observational samples. The discrimination between CDM and SIDM models is challenging at this mass scale, but the deviations of SIDM from CDM can still be found by considering the dark matter/baryonic fractions separately.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Anowar J. Shajib, Eden Molina, Adriano Agnello, Peter R. Williams, Simon Birrer, Tommaso Treu, Christopher D. Fassnacht, Takahiro Morishita, Louis Abramson, Paul L. Schechter, Lutz Wisotzki
Summary: The study reports on 3 years of follow-up and confirmation work using the Near-Infrared Camera, identifying a total of 15 lenses and forming a sample of 20 lenses. The research also provides lens properties and predicted time delays to aid in planning follow-up observations.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Sampath Mukherjee, Leon V. E. Koopmans, Crescenzo Tortora, Matthieu Schaller, R. Benton Metcalf, Joop Schaye, Georgios Vernardos
Summary: The central dark-matter fraction of galaxies, influenced by feedback processes during formation, has been accurately measured using strong gravitational lensing techniques. Comparisons of observational data with simulations show good agreement between the EAGLE and SLACS results, while results from IllustrisTNG and Illustris simulations are lower than observed values. Differences in the stellar feedback model are likely the main cause of this discrepancy.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Amy Etherington, James W. Nightingale, Richard Massey, Andrew Robertson, XiaoYue Cao, Aristeidis Amvrosiadis, Shaun Cole, Carlos S. Frenk, Qiuhan He, David J. Lagattuta, Samuel Lange, Ran Li
Summary: Observations suggest that the combination of dark matter and stars in early-type galaxies leads to a surprisingly simple mass distribution. By analyzing 48 early-type galaxies with gravitational lensing effects, we find a consistent mass distribution with a mean value of 2.075 and an intrinsic scatter of 0.172. However, when measuring the dependence of surface mass density on lens galaxy, the consistency breaks down, indicating the presence of an inflection point in the total mass-density profile.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
R. Gobat, C. D'Eugenio, D. Liu, G. B. Caminha, E. Daddi, D. Blanquez
Summary: The amount of gas and dust in high-redshift quiescent galaxies is still uncertain, with few and contradictory answers. New research suggests that the dust content is more complex than previously thought, and the measurement results are highly sensitive to the adopted extraction method and conversion factors.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
T. N. Varga, D. Gruen, S. Seitz, N. MacCrann, E. Sheldon, W. G. Hartley, A. Amon, A. Choi, A. Palmese, Y. Zhang, M. R. Becker, J. McCullough, E. Rozo, E. S. Rykoff, C. To, S. Grandis, G. M. Bernstein, S. Dodelson, K. Eckert, S. Everett, R. A. Gruendl, I. Harrison, K. Herner, R. P. Rollins, I. Sevilla-Noarbe, M. A. Troxel, B. Yanny, J. Zuntz, H. T. Diehl, M. Jarvis, M. Aguena, S. Allam, J. Annis, E. Bertin, S. Bhargava, D. Brooks, A. Carnero Rosell, M. Carrasco Kind, J. Carretero, M. Costanzi, L. N. da Costa, M. E. S. Pereira, J. De Vicente, S. Desai, J. P. Dietrich, I. Ferrero, B. Flaugher, J. Garcia-Bellido, E. Gaztanaga, D. W. Gerdes, J. Gschwend, G. Gutierrez, S. R. Hinton, K. Honscheid, T. Jeltema, K. Kuehn, N. Kuropatkin, M. A. G. Maia, M. March, P. Melchior, F. Menanteau, R. Miquel, R. Morgan, J. Myles, F. Paz-Chinchon, A. A. Plazas, A. K. Romer, E. Sanchez, V. Scarpine, M. Schubnell, S. Serrano, M. Smith, M. Soares-Santos, E. Suchyta, M. E. C. Swanson, G. Tarle, D. Thomas, J. Weller
Summary: We have developed a novel data-driven method for generating synthetic optical observations of galaxy clusters. By measuring and modeling the photometric properties of galaxy clusters and extrapolating the galaxy populations, we can create synthetic galaxy clusters in the same format as actual survey observations. This method can be used to test systematic uncertainties in cluster mass measurements.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Bailey Robison, Michael J. Hudson, Jean-Charles Cuillandre, Thomas Erben, Sebastien Fabbro, Raphael Gavazzi, Axel Guinot, Stephen Gwyn, Hendrik Hildebrandt, Martin Kilbinger, Alan McConnachie, Lance Miller, Isaac Spitzer, Ludovic van Waerbeke
Summary: Using weak gravitational lensing, the ellipticity of dark matter haloes around Luminous Red Galaxies (LRGs) was measured. The results showed that for LRGs in the Sloan Digital Sky Survey Data Release 7 (DR7) with mass M~ 2.7 x 10^13 M_sun h^-1, the halo ellipticity was found to be e = 0.46 +/- 0.10, with f(h) = 2.2 +/- 0.6 as a fraction of the galaxy's ellipticity. For BOSS LRGs, the detection was marginally significant: e = 0.20 +/- 0.10 and f(h) = 0.7 +/- 0.7. These findings are consistent with previous measurements and suggest an increase in halo ellipticity of 0.10 +/- 0.06 per decade in halo mass.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Shawn Knabel, B. W. Holwerda, J. Nightingale, T. Treu, M. Bilicki, S. Brough, S. Driver, L. Finnerty, L. Haberzettl, S. Hegde, A. M. Hopkins, K. Kuijken, J. Liske, A. K. Pimblett, R. C. Steele, A. H. Wright
Summary: This study applies automated Bayesian lens modelling methods to large-survey data from KiDS and GAMA in order to model strong gravitational lenses. The results demonstrate the feasibility of modelling strong lenses with lower resolution large-survey data as a complementary approach to studying individual lenses at higher resolution.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Guillaume Mahler, Priyamvada Natarajan, Mathilde Jauzac, Johan Richard
Summary: This study delves into the gravitational lensing effects of supermassive black holes (SMBHs) in galaxy clusters, revealing how the presence of SMBHs can impact statistical lensing properties and individual lensed image configurations. Despite not showing statistically significant evidence in certain distributions, SMBHs do leave detectable signatures in rare, higher order strong lensing image configurations, such as image splitting and magnification asymmetries. Future high-resolution observations with advanced instrumentation are likely to offer more insights into these unique yet rare SMBHs lensing signatures.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
H. Ebeling, J. Richard, I Smail, A. C. Edge, A. M. Koekemoer, L. Zalesky
Summary: eMACS J0252 is a massive and highly evolved galaxy cluster with high velocity dispersion and X-ray luminosity. The brightest cluster galaxy forms stars at an extreme rate and exhibits radially symmetric gas flow, potentially indicating a cooling flow. Strong-lensing analysis suggests the presence of a single cluster-scale halo with high ellipticity, and further studies are needed to understand the system's dynamical state and evolution.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
S. Samuroff, R. Mandelbaum, J. Blazek, A. Campos, N. MacCrann, G. Zacharegkas, A. Amon, J. Prat, S. Singh, J. Elvin-Poole, A. J. Ross, A. Alarcon, E. Baxter, K. Bechtol, M. R. Becker, G. M. Bernstein, A. Carnero Rosell, M. Carrasco Kind, R. Cawthon, C. Chang, R. Chen, A. Choi, M. Crocce, C. Davis, J. DeRose, S. Dodelson, C. Doux, A. Drlica-Wagner, K. Eckert, S. Everett, A. Ferte, M. Gatti, G. Giannini, D. Gruen, R. A. Gruendl, I Harrison, K. Herner, E. M. Huff, M. Jarvis, N. Kuropatkin, P-F Leget, P. Lemos, J. McCullough, J. Myles, A. Navarro-Alsina, S. Pandey, A. Porredon, M. Raveri, M. Rodriguez-Monroy, R. P. Rollins, A. Roodman, G. Rossi, E. S. Rykoff, C. Sanchez, L. F. Secco, I Sevilla-Noarbe, E. Sheldon, T. Shin, M. A. Troxel, I Tutusaus, N. Weaverdyck, B. Yanny, B. Yin, Y. Zhang, J. Zuntz, M. Aguena, O. Alves, J. Annis, D. Bacon, E. Bertin, S. Bocquet, D. Brooks, D. L. Burke, J. Carretero, M. Costanzi, L. N. da Costa, M. E. S. Pereira, J. De Vicente, S. Desai, H. T. Diehl, J. P. Dietrich, P. Doel, I Ferrero, B. Flaugher, J. Frieman, J. Garcia-Bellido, S. R. Hinton, D. L. Hollowood, K. Honscheid, D. J. James, K. Kuehn, O. Lahav, J. L. Marshall, P. Melchior, J. Mena-Fernandez, F. Menanteau, R. Miquel, J. Newman, A. Palmese, A. Pieres, A. A. Plazas Malagon, E. Sanchez, V Scarpine, M. Smith, E. Suchyta, M. E. C. Swanson, G. Tarle, C. To
Summary: We directly constrain galaxy intrinsic alignments (IAs) using data from Dark Energy Survey Year 3 (DES Y3), Extended Baryon Oscillation Spectroscopic Survey (eBOSS), and Baryon Oscillation Spectroscopic Survey (BOSS). Our measurements incorporate different types of galaxies at various redshifts and fit a model that includes lensing, magnification, and photometric redshift error. We detect IAs in each sample and observe a detectable dependence on color between broadly defined red samples. It is likely that future measurements will require a more sophisticated approach to account for the effects of color and luminosity on the IA signal.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
G. B. Caminha, S. H. Suyu, C. Grillo, P. Rosati
Summary: Cluster strong lensing cosmography is a promising method to assess the background geometry of the Universe. Our study used a sample of five cluster strong lenses and combined them with other classical probes to measure cosmological parameters. We found good constraining power on the total matter density and the equation of state of dark energy, and our results were complementary and in good agreement with measurements from other probes.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
A. Bolamperti, C. Grillo, R. Canameras, S. H. Suyu, L. Christensen
Summary: We conducted a full strong lensing analysis on the deflector SDSS J0100+1818 to study its total and baryonic mass distributions. Through high-resolution HST photometry and VLT/X-shooter spectroscopy, we measured the positions of multiple images and modeled the background sources. We successfully predicted the positions of observed multiple images and reconstructed the surface brightness distributions of the sources. Our analysis showed that the lens galaxy has a total mass of (9.1 +/- 0.1)x10(12)M(circle dot) and a concentrated baryonic mass component in its core.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
M. Girardi, S. Zarattini, W. Boschin, M. Nonino, I. Bartalucci, A. Mercurio, N. Nocerino, P. Rosati
Summary: This study reports the serendipitous discovery of a group of galaxies with signs of diffuse light in the foreground of the known galaxy cluster MACS J0329-0211 at z similar to 0:45. The investigation was based on the detection of diffuse light streams around a pair of bright galaxies and the analysis of redshift data collected in the region. The results suggest that the group is a virialized structure and can serve as signposts for groups.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
P. Bergamini, A. Acebron, C. Grillo, P. Rosati, G. B. Caminha, A. Mercurio, E. Vanzella, G. Angora, G. Brammer, M. Meneghetti, M. Nonino
Summary: In this study, a new strong lensing model for the Hubble Frontier Fields galaxy cluster Abell 2744 is presented, based on HST multiband imaging and MUSE follow-up spectroscopy. The inner mass distribution and critical lines of the cluster were accurately characterized using 90 spectroscopically confirmed multiple images. The lensing contribution of cluster members and the role of subhalo mass component were also investigated.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Mario Nonino, Karl Glazebrook, Adam J. J. Burgasser, Gianluca Polenta, Takahiro Morishita, Marius Lepinzan, Marco Castellano, Adriano Fontana, Emiliano Merlin, Andrea Bonchi, Diego Paris, Tommaso Treu, Benedetta Vulcani, Xin Wang, Paola Santini, Eros Vanzella, Themiya Nanayakkara, Amata Mercurio, Piero Rosati, Claudio Grillo, Marusa Bradac
Summary: We have discovered a late T-type brown dwarf candidate in JWST NIRCam observations, using the sensitivity of JWST at 4 μm wavelengths and the panchromatic 0.9-4.5 μm coverage of the spectral energy distribution. Comparison with stellar atmospheric models shows that it has a temperature of approximately 650 K and a mass of 0.03 M-?, with an estimated age of 5 Gyr. The candidate is likely to be a thick disk or halo brown dwarf, located at a distance of 570-720 pc perpendicular to the Galactic plane, which highlights the power of JWST in probing the low-mass end of the substellar mass function in the Galactic thick disk and halo.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
E. Vanzella, M. Castellano, P. Bergamini, T. Treu, A. Mercurio, C. Scarlata, P. Rosati, C. Grillo, A. Acebron, G. B. Caminha, M. Nonino, T. Nanayakkara, G. Roberts-Borsani, M. Bradac, X. Wang, G. Brammer, V Strait, B. Vulcani, U. Mestric, M. Meneghetti, F. Calura, Alaina Henry, A. Zanella, M. Trenti, K. Boyett, T. Morishita, A. Calabro, K. Glazebrook, D. Marchesini, S. Birrer, L. Yang, T. Jones
Summary: In this study, the blue and optical sizes of three compact star-forming regions in a strongly lensed galaxy were investigated using JWST/NIRISS imaging. The results show that these star-forming regions are the highest-redshift and most massive young massive star clusters known, with a high specific star formation rate.
ASTROPHYSICAL JOURNAL LETTERS
(2022)
Article
Astronomy & Astrophysics
Danilo Marchesini, Gabriel Brammer, Takahiro Morishita, Pietro Bergamini, Xin Wang, Marusa Bradac, Guido Roberts-Borsani, Victoria Strait, Tommaso Treu, Adriano Fontana, Tucker Jones, Paola Santini, Benedetta Vulcani, Ana Acebron, Antonello Calabro, Marco Castellano, Karl Glazebrook, Claudio Grillo, Amata Mercurio, Themiya Nanayakkara, Piero Rosati, Chanita Tubthong, Eros Vanzella
Summary: Understanding how passive galaxies form and the mechanisms that prevent star formation over long timescales is crucial for galaxy evolution. By using JWST-NIRISS grism slitless spectroscopic data, we identified and confirmed two quiescent galaxies at z(spec) = 2.650(-0.006)(+0.004) and -z(spec) = 2.433(-0.016)(+0.032) with stellar masses of ( log M-star/M-?) = 10.59(-0.05)(+0.11) and ( log M-star/M-?) = 10.07(-0.03)(+0.06), respectively (corrected for magnification factors of mu = 2.0 and mu = 2.1). This marks the first spectroscopic confirmation of the existence of low-mass quiescent galaxies at cosmic noon, highlighting the capability of JWST to identify and characterize this elusive population.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Review
Physics, Particles & Fields
Michele Moresco, Lorenzo Amati, Luca Amendola, Simon Birrer, John P. Blakeslee, Michele Cantiello, Andrea Cimatti, Jeremy Darling, Massimo Della Valle, Maya Fishbach, Claudio Grillo, Nico Hamaus, Daniel Holz, Luca Izzo, Raul Jimenez, Elisabeta Lusso, Massimo Meneghetti, Ester Piedipalumbo, Alice Pisani, Alkistis Pourtsidou, Lucia Pozzetti, Miguel Quartin, Guido Risaliti, Piero Rosati, Licia Verde
Summary: The discovery of accelerated expansion in the Universe is a major breakthrough in modern cosmology. Different cosmological probes have been studied to understand this acceleration and constraints have been achieved, but tensions between measurements from different methods have surfaced recently. It is crucial to expand the selection of cosmological probes to validate results and increase accuracy.
LIVING REVIEWS IN RELATIVITY
(2022)
Article
Astronomy & Astrophysics
Cristiano Longarini, Giuseppe Lodato, Giuseppe Bertin, Philip J. Armitage
Summary: Recent observations indicate that planet formation occurs in young systems, even when the protostar is still embedded in the molecular cloud and the accretion disc is massive. The dynamical evolution of the disc in such environments is determined by the crucial role of self-gravity and gravitational instability. This study investigates the role of drag force in self-gravitating discs for the formation of planetesimals during early protoplanetary stages, finding that the stability threshold depends on the local dust-to-gas density ratio, dust relative temperature, and relevant Stokes number.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
S. Mascia, L. Pentericci, A. Calabro, T. Treu, P. Santini, L. Yang, L. Napolitano, G. Roberts-Borsani, P. Bergamini, C. Grillo, P. Rosati, B. Vulcani, M. Castellano, K. Boyett, A. Fontana, K. Glazebrook, A. Henry, C. Mason, E. Merlin, T. Morishita, T. Nanayakkara, D. Paris, N. Roy, H. Williams, X. Wang, G. Brammer, M. Bradac, W. Chen, P. L. Kelly, A. M. Koekemoer, M. Trenti, R. A. Windhorst
Summary: Following a combined analysis of JWST-NIRSpec and NIRCam data, we found that the gravitationally lensed galaxies in the Abell 2744 cluster field share similar characteristics with low-redshift LyC leakers, such as low masses, blue UV spectral slopes, compact sizes, and high [OIII]/[OII] flux ratios. By indirectly inferring the fraction of escaping ionizing photons, we determined that over 80% of the galaxies have predicted f(esc) values larger than 0.05, indicating their classification as leakers. The average predicted f(esc) value of our sample is 0.12, suggesting a significant contribution to cosmic reionization from similar galaxies at z >= 6.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Benedetta Vulcani, Tommaso Treu, Antonello Calabro, Jacopo Fritz, Bianca M. Poggianti, Pietro Bergamini, Andrea Bonchi, Kristan Boyett, Gabriel B. Caminha, Marco Castellano, Alan Dressler, Adriano Fontana, Karl Glazebrook, Claudio Grillo, Matthew A. Malkan, Sara Mascia, Amata Mercurio, Emiliano Merlin, Benjamin Metha, Takahiro Morishita, Themiya Nanayakkara, Diego Paris, Guido Roberts-Borsani, Piero Rosati, Namrata Roy, Paola Santini, Michele Trenti, Eros Vanzella, Xin Wang
Summary: We used JWST/NIRCam imaging and MUSE data to study galaxies in the cluster Abell2744 and its surroundings. We found a population of galaxies with red colors in F200W-F444W, even in the field region. These galaxies have normal F115W-F150W colors but are redder than red sequence galaxies in F200W-F444W. Many cluster galaxies show signs of ram pressure stripping, while field galaxies have features resembling interactions and mergers. We hypothesize that these galaxies have dust-enshrouded star formation.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
P. D. Aleo, K. Malanchev, S. Sharief, D. O. Jones, G. Narayan, R. J. Foley, V. A. Villar, C. R. Angus, V. F. Baldassare, M. J. Bustamante-Rosell, D. Chatterjee, C. Cold, D. A. Coulter, K. W. Davis, S. Dhawan, M. R. Drout, A. Engel, K. D. French, A. Gagliano, C. Gall, J. Hjorth, M. E. Huber, W. V. Jacobson-Galan, C. D. Kilpatrick, D. Langeroodi, P. Macias, K. S. Mandel, R. Margutti, F. Matasic, P. McGill, J. D. R. Pierel, E. Ramirez-Ruiz, C. L. Ransome, C. Rojas-Bravo, M. R. Siebert, K. W. Smith, K. M. de Soto, M. C. Stroh, S. Tinyanont, K. Taggart, S. M. Ward, R. Wojtak, K. Auchettl, P. K. Blanchard, T. J. L. de Boer, B. M. Boyd, C. M. Carroll, K. C. Chambers, L. DeMarchi, G. Dimitriadis, S. A. Dodd, N. Earl, D. Farias, H. Gao, S. Gomez, M. Grayling, C. Grillo, E. E. Hayes, T. Hung, L. Izzo, N. Khetan, A. N. Kolborg, J. A. P. Law-Smith, N. LeBaron, C. -c. Lin, Y. Luo, E. A. Magnier, D. Matthews, B. Mockler, A. J. G. O'Grady, Y. -c. Pan, C. A. Politsch, S. I. Raimundo, A. Rest, R. Ridden-Harper, A. Sarangi, S. L. Schroder, S. J. Smartt, G. Terreran, S. Thorp, J. Vazquez, R. J. Wainscoat, Q. Wang, A. R. Wasserman, S. K. Yadavalli, R. Yarza, Y. Zenati
Summary: YSE DR1 is an important data release, consisting of multicolor PanSTARRS1 griz and Zwicky Transient Facility (ZTF) gr photometry of 1975 transients with host-galaxy associations, redshifts, spectroscopic and/or photometric classifications, and additional data products from 2019 November 24 to 2021 December 20. This dataset is crucial for building discovery, anomaly detection, and classification algorithms, performing cosmological analyses, understanding the nature of red and rare transients, exploring tidal disruption events and nuclear variability, and preparing for the forthcoming Vera C. Rubin Observatory Legacy Survey of Space and Time.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2023)
Article
Astronomy & Astrophysics
G. Angora, P. Rosati, M. Meneghetti, M. Brescia, A. Mercurio, C. Grillo, P. Bergamini, A. Acebron, G. Caminha, M. Nonino, L. Tortorelli, L. Bazzanini, E. Vanzella
Summary: This study utilizes deep learning techniques to search for galaxy-galaxy strong-lensing systems in multi-band imaging from the Hubble Space Telescope. The classification and performance evaluation of these systems are conducted using observation data and simulated data with high-precision lensing models.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Andrea Biviano, Lorenzo Pizzuti, Amata Mercurio, Barbara Sartoris, Piero Rosati, Stefano Ettori, Marisa Girardi, Claudio Grillo, Gabriel B. Caminha, Mario Nonino
Summary: The inner slope of the dark matter density profile provides information about dark matter and baryonic processes. By studying the dark matter density profile of the MACS J1206.2-0847 cluster, we find that the inner slope is consistent with recent simulation predictions.
ASTROPHYSICAL JOURNAL
(2023)