Article
Astronomy & Astrophysics
S. Badole, D. Venkattu, N. Jackson, S. Wallace, J. Dhandha, P. Hartley, C. Riddell-Rovira, A. Townsend, L. K. Morabito, J. P. McKean
Summary: In this study, Low-Frequency Array (LOFAR) telescope observations of the radio-loud gravitational lens systems MG 0751+2716 and CLASS B1600+434 are presented. The results show that the low-frequency radio source is consistent with the core-jet structure observed at higher frequencies, and no significant lobe emission or star formation-related components are detected within the magnified region of the lens. The observations also provide limits on propagation effects, specifically scattering, in the lensing galaxy of CLASS B1600+434. These findings demonstrate the effectiveness of LOFAR in studying gravitational lenses.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
A. D. Biggs
Summary: The study presents an analysis of two seasons of monitoring data of the quad lens system JVAS B1422+231, showing significant variability but lacking short time-scale features for accurate time delay measurement between the images. The faint image D is detected for the first time, revealing its long-term variability and polarization properties. The variation in multiple images, particularly in image D at 15 GHz, is likely caused by microlensing from compact objects in the lensing galaxy. The study also detects a faint arc of emission and images the responsible jets using archival VLBA data.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
M. R. S. Hawkins
Summary: This paper reviews the classification of the wide separation double quasar Q2138-431 as a gravitational lens, presenting evidence of a lensing galaxy and utilizing light curves and mass modeling to support the conclusion.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
A. D. Biggs
Summary: The analysis of archival multi-frequency Very Large Array monitoring data of the two-image gravitational lens system CLASS B1600+434 reveals consistent time delays at different frequencies, total flux density, and polarization properties. The study also uncovers jets in the system for the first time and speculates the presence of a naked-cusp lensing configuration.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
E. Paic, G. Vernardos, D. Sluse, M. Millon, F. Courbin, J. H. Chan, V Bonvin
Summary: Gravitational microlensing is a powerful tool for studying the inner structure of strongly lensed quasars and constraining parameters of the stellar mass function of lens galaxies. By analyzing microlensing light curves, we can take into account the effects of various components and accurately measure the size of the broad line region.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
C. Lemon, M. Millon, D. Sluse, F. Courbin, M. Auger, J. H. H. Chan, E. Paic, A. Agnello
Summary: This study presents the discovery of a quadruply lensed quasar with a redshift of approximately 2.38. Using lens modeling, it is found that the quasar consists of two sources separated by about 6.0 kiloparsecs. This discovery suggests the existence of a large population of sub-10-kiloparsec binary quasars that have not been observed before. Additionally, traces of a proximate damped Lyman-alpha absorber (PDLA) are found, and a new potential tool for studying micro lensing and the quasar host galaxy simultaneously is proposed.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
A. Niemiec, M. Jauzac, D. Eckert, D. Lagattuta, K. Sharon, A. M. Koekemoer, K. Umetsu, A. Acebron, J. M. Diego, D. Harvey, E. Jullo, V Kokorev, M. Limousin, G. Mahler, P. Natarajan, M. Nonino, C. Steinhardt, S- Tam, A. Zitrin
Summary: The study presents a combined strong and weak lensing analysis of the Abell 370 cluster using the HST BUFFALO program. Seven candidate substructures were identified and evaluated for their physical significance. Five of these candidates were found to be reliable, and the mass distribution in Abell 370 was observed to extend along the north-west and south-east directions. This research provides new insights into the complex mass distribution of clusters at large cluster-centric radii.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Yoon Chan Taak, Tommaso Treu
Summary: Strong lensed quasi-stellar objects (QSOs) are important for studying the Universe and can be used for reverberation mapping and time delay measurements to determine cosmological parameters. This paper forecasts the number of strong lensed QSOs with sufficient variability that can be detected by the Vera C. Rubin Telescope Legacy Survey of Space and Time (LSST). The study shows that LSST can detect variability in about 30-40% of the lensed QSO sample, and a smaller subset of 250 lensed QSOs will show larger variability for monitoring with smaller telescopes.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Tonghua Liu, Shuo Cao, Xiaolei Li, Hao Zheng, Yuting Liu, Wuzheng Guo, Chenfa Zheng
Summary: In this study, a newly compiled sample of radio quasars and strong gravitational lensing systems was used to constrain six cosmological models. The results indicate that the measured Hubble constant is consistent with recent observations and support the concept of zero spatial curvature and a flat universe.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Minghao Yue, Xiaohui Fan, Jinyi Yang, Feige Wang
Summary: This article presents a mock catalog of gravitationally-lensed quasars, along with simulated images, for the Rubin Observatory Legacy Survey of Space and Time (LSST). The catalog includes modeling of the quasar population and the deflector galaxies. The mock catalog is highly complete and can be used for studying and searching for gravitationally-lensed quasars.
ASTRONOMICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
S. Huber, S. H. Suyu, U. M. Noebauer, J. H. H. Chan, M. Kromer, S. A. Sim, D. Sluse, S. Taubenberger
Summary: To study the use of strongly lensed Type Ia supernovae (LSNe Ia) for cosmology, it is necessary to measure time delays between multiple supernova images. The sharp rise and decline of SN Ia light curves make them suitable for measuring time delays, but microlensing can introduce uncertainties. Using color curves during the achromatic phase can reduce uncertainties due to microlensing, but the duration of this phase can vary depending on different factors.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
J. P. McKean, R. Luichies, A. Drabent, G. Gurkan, P. Hartley, A. Lafontaine, I Prandoni, H. J. A. Rottgering, T. W. Shimwell, H. R. Stacey, C. Tasse
Summary: This study reports extremely faint 144 MHz radio emission from two gravitationally lensed quasars using the LOFAR Two Metre Sky Survey data. One of the objects is identified as the faintest radio source detected so far at low frequencies. Predicted star-formation rates for the quasar host galaxies are provided based on the assumption that all radio emission is due to star-formation processes. Further observations are needed to determine the origin of the radio emission detected.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Giovanni Covone, Mauro Sereno
Summary: This article discusses the gravitational lensing phenomena that occur due to the redshift drift between the lensed source, gravitational lens, and observer. The proximity of the source to the drifting caustics can result in the occurrence or disappearance of a pair of images due to cosmological expansion. Lensing systems act as signal converters, altering the angular position, magnification, distortion, and time delay of existing multiple images.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(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
J. H. H. Chan, K. Rojas, M. Millon, F. Courbin, V. Bonvin, G. Jauffret
Summary: Time-delay cosmography in strongly lensed quasars provides an independent method for measuring the Hubble constant, but microlensing effects can introduce uncertainties in time-delay measurements. This study investigates how microlensing time delays are affected by assumptions on the initial mass function and proposes a new method to measure the color-dependent source size in lensed quasars using multi-band light curves. Results show that precise differential time delays between bands can help recover the disk size with a factor of 2 accuracy and achieve unbiased source measurements within a 20% error margin.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
I-Non Chiu, Vittorio Ghirardini, Ang Liu, Sebastian Grandis, Esra Bulbul, Y. Emre Bahar, Johan Comparat, Sebastian Bocquet, Nicolas Clerc, Matthias Klein, Teng Liu, Xiangchong Li, Hironao Miyatake, Joseph Mohr, Surhud More, Masamune Oguri, Nobuhiro Okabe, Florian Pacaud, Miriam E. Ramos-Ceja, Thomas H. Reiprich, Tim Schrabback, Keiichi Umetsu
Summary: We present the first weak-lensing mass calibration and X-ray scaling relations of galaxy clusters and groups selected in the eFEDS survey. The results show that most of the X-ray scaling relations are consistent with the self-similar prediction in terms of mass trend and redshift scaling.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Hung-Yu Jian, Lihwai Lin, Bau-Ching Hsieh, Kai-Yang Lin, Keiichi Umetsu, Carlos Lopez-Coba, Yusei Koyama, Chin-Hao Hsu, Yung-Chau Su, Yu-Yen Chang, Tadayuki Kodama, Yutaka Komiyama, Surhud More, Atsushi J. Nishizawa, Masamune Oguri, Ichi Tanaka
Summary: This study explores the properties of galaxies located in voids identified from the Baryon Oscillation Spectroscopic Survey using the Hyper Suprime-Cam (HSC) Wide Survey. The study finds that void galaxies have lower densities compared to the mean density and have slightly higher fractions of star-forming galaxies. However, the specific star formation rate and the green valley fraction of void galaxies are similar to those of control galaxies.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Xiangchong Li, Hironao Miyatake, Wentao Luo, Surhud More, Masamune Oguri, Takashi Hamana, Rachel Mandelbaum, Masato Shirasaki, Masahiro Takada, Robert Armstrong, Arun Kannawadi, Satoshi Takita, Satoshi Miyazaki, Atsushi J. Nishizawa, Andres A. Plazas Malagon, Michael A. Strauss, Masayuki Tanaka, Naoki Yoshida
Summary: We present a galaxy shear catalog for three-year cosmological weak gravitational lensing analyses. The catalog is based on data from the Wide layer of the HSC Subaru SSP Survey and covers an area of 433.48 deg(2) of the northern sky. The galaxy shapes are measured from i-band imaging data and calibrated with image simulations. The catalog meets the requirements for cosmological weak-lensing science, but there are residual biases related to PSF model shape and star-galaxy shape correlations that need mitigation.
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
(2022)
Article
Astronomy & Astrophysics
Yun-Hsin Hsu, Yen-Ting Lin, Song Huang, Dylan Nelson, Vicente Rodriguez-Gomez, Hsuan-Ting Lai, Jenny Greene, Alexie Leauthaud, Alfonso Aragon-Salamanca, Kevin Bundy, Eric Emsellem, Michael Merrifield, Surhud More, Nobuhiro Okabe, Yu Rong, Joel R. Brownstein, Richard R. Lane, Kaike Pan, Donald P. Schneider
Summary: The late time stellar mass growth of brightest cluster galaxies (BCGs) is not well understood. By measuring the frequency of BCGs with multiple cores, a proxy of the merger rates, a comparison with theoretical predictions is made. Results show a similar multiple-core frequency between observations and simulations, providing insights into the mass growth rate of BCGs over the past 4.5 Gyr.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Souradip Bhattacharyya, Susmita Adhikari, Arka Banerjee, Surhud More, Amit Kumar, Ethan O. Nadler, Suchetana Chatterjee
Summary: The abundance, distribution, and inner structure of satellites of galaxy clusters can provide sensitive probes of dark matter properties. Simulations with self-interacting dark matter (SIDM) show a suppression in the abundance of survived subhalos compared to cold dark matter (CDM). Taking into account the disrupted subhalos, which may host orphan galaxies, reconciles the satellite galaxy populations in CDM and SIDM models, but the inner structures of subhalos still differ significantly. The feasibility of using weak-lensing signal from subhalo density profiles to distinguish between CDM and SIDM is studied, considering the contribution of orphan galaxies.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Anupreeta More, Surhud More
Summary: As the sensitivity of gravitational wave observatories increases, the possibility of observing strongly lensed pairs of events becomes more real. By utilizing gravitational wave events, we can constrain important astrophysical parameters of the lens system. The development of diagnostics is necessary to robustly identify lensed events. A new statistic based on the joint probability of lensing observables is proposed to discriminate between lensed and unlensed event pairs.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Takashi Hamana, Chiaki Hikage, Masamune Oguri, Masato Shirasaki, Surhud More
Summary: In this study, a cosmic shear analysis of HSC-Y1 data was performed using COSEBIs to derive cosmological constraints. The results show that the derived cosmological parameters are consistent with previous studies.
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
(2022)
Article
Astronomy & Astrophysics
Amit Kumar, Surhud More, Divya Rana
Summary: This study uses weak gravitational lensing to investigate the matter distribution surrounding satellite galaxies. The results suggest a difference in the mass of subhalos between satellite galaxies and galaxies in a control sample. Furthermore, the study provides upper limits on the prevalence of orphan galaxies based on the measurements.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Youngsoo Park, Tomomi Sunayama, Masahiro Takada, Yosuke Kobayashi, Hironao Miyatake, Surhud More, Takahiro Nishimichi, Sunao Sugiyama
Summary: We propose a novel analysis method for cluster cosmology that includes an empirical model for anisotropic boosts affecting the lensing and clustering signals of optical clusters. We validate our analysis through a blind cosmology challenge and obtain tight and unbiased cosmological constraints. Applying our analysis on the SDSS redMaPPer clusters, we find results favoring low omega(m) and high sigma(8).
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Thomas M. Jackson, Anna Pasquali, Francesco La Barbera, Surhud More, Eva K. Grebel
Summary: We examine the stellar mass density and color profiles of a sample of 118 central galaxies at low redshift. We find evidence of minor mergers, supporting the idea that these mergers drive the growth of quiescent galaxies. Using imaging data and SED fitting, we construct spatially resolved radial profiles. Our analysis reveals tidal features in about 42% of the sample, a diffuse stellar halo in 43%, and no features in 14%. We observe a flattening of the profile in the outskirts, providing further support for the role of minor mergers.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Ayan Mitra, Richard Kessler, Surhud More, Renee Hlozek, LSST Dark Energy Sci Collaboration
Summary: We conducted a cosmology analysis on simulated Type Ia supernovae (SNe Ia) to evaluate the improvement by including photometric host galaxy redshifts compared to spectroscopic redshifts. The analysis included light-curve fitting, simulation for bias correction, and cosmology fitting. Including events with SN+host photo-z resulted in more precise distances, extended redshift range in the Hubble diagram, and increased figure of merit for dark energy. The average bias on cosmological parameters was consistent with zero.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Hung-Yu Jian, Lihwai Lin, Bau-Ching Hsieh, Keiichi Umetsu, Carlos Lopez-Coba, Masamune Oguri, Connor Bottrell, Yoshiki Toba, Yusei Koyama, Yu-Yen Chang, Tadayuki Kodama, Yutaka Komiyama, Surhud More, Kai-Yang Lin, Atsushi J. Nishizawa, Ichi Tanaka
Summary: This study examines the impact of cluster environments on galaxy properties and finds a slow quenching mechanism at work, with radial and density-related quenching processes equally crucial for low-mass cluster galaxies.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Edward Ashton, Chan-Kao Chang, Ying-Tung Chen, Matthew J. Lehner, Shiang-Yu Wang, Mike Alexandersen, Young-Jun Choi, Wesley C. Fraser, A. Paula Contreras, Takashi Ito, Youngmin JeongAhn, Jianghui Ji, J. J. Kavelaars, Myung-Jin M. Kim, Samantha M. Lawler, Jian Li, Zhong-Yi Lin, Patryk Sofia Lykawka, Hong-Kyu Moon, Surhud More, Marco A. Munoz-Gutierrez, Keiji Ohtsuki, Rosemary E. Pike, Tsuyoshi Terai, Seitaro Urakawa, Fumi Yoshida, Hui Zhang, Haibin Zhao, Ji-Lin Zhou
Summary: From the initial phase of the FOSSIL survey, 29 TNOs with periodic lightcurves were identified, including a candidate for a close/contact binary and a potential TNO with the fastest spin rate. A weak correlation between absolute magnitude and lightcurve amplitude was also observed.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2023)
Article
Astronomy & Astrophysics
Preetish K. Mishra, Divya Rana, Surhud More
Summary: This study investigates the relationship between stellar mass and the size of galaxies in relation to the radius of dark matter halos using weak gravitational lensing measurements. The findings suggest that the ratio of galaxy size to halo radius remains constant over a certain range of stellar mass, but shows a decreasing trend in low-mass galaxies. This calls for either modifications to models explaining the sizes of dwarf galaxies or a better understanding of dark matter halos in low-mass galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Sunao Sugiyama, Masahiro Takada, Hironao Miyatake, Takahiro Nishimichi, Masato Shirasaki, Yosuke Kobayashi, Rachel Mandelbaum, Surhud More, Ryuichi Takahashi, Ken Osato, Masamune Oguri, Jean Coupon, Chiaki Hikage, Bau-Ching Hsieh, Yotaka Komiyama, Alexie Leauthaud, Xiangchong Li, Wentao Luo, Robert H. Lupton, Hitoshi Murayama, Atsushi J. Nishizawa, Youngsoo Park, Paul A. Price, Melanie Simet, Joshua S. Speagle, Michael A. Strauss, Masayuki Tanaka
Summary: In this study, cosmological parameter constraints are obtained by analyzing the galaxy-galaxy weak lensing and projected correlation function data from HSC-Y1 and SDSS spectroscopic galaxies. The results show consistency with the expected cosmological model and are consistent with other experimental results within statistical uncertainties.
