Article
Astronomy & Astrophysics
Alister W. Graham
Summary: One of the longstanding problems in astronomy is understanding the evolution of galaxy morphology. Recent research has found that spiral galaxies serve as a bridging population between low-mass accretion-built galaxies and dusty merger-built lenticular galaxies. Additionally, a new morphology sequence called the "Triangal" has been identified, which highlights the bridging nature of overlooked lenticular galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Alister W. Graham
Summary: This study advances our understanding of the relationship between galaxy morphology and the mass of black holes, as well as the stellar mass of spheroids/galaxies. By introducing dust bins for lenticular (S0) galaxies, the study reveals new relations for dusty S0 galaxies that are offset from the distribution of dust-poor S0 galaxies. The findings have implications for estimating black hole mass in other galaxies and various areas of research. Overall, this study is highly significant and deserves a rating of 9 out of 10.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Zachary Byrne, Michael J. Drinkwater, Holger Baumgardt, David Blyth, Patrick Cote, Nora Luetzgendorf, Chelsea Spengler, Laura Ferrarese, Smriti Mahajan, Joel Pfeffer, Sarah Sweet
Summary: The observed scaling relations between supermassive black hole masses and their host galaxy properties suggest that supermassive black holes have an impact on galaxy evolution. However, the accuracy of these scaling relations may be affected by selection biases. To address this issue, the researchers propose to measure black hole masses in a mass-limited galaxy sample that includes all non-detections. By doing so, they aim to improve the constraints on galaxy mass-black hole mass scaling relations and test for selection bias.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Jian-Min Wang, Yu-Yang Songsheng, Yan-Rong Li, Pu Du
Summary: This paper discusses the fate of mini-discs around binary supermassive black holes in three different regimes and studies the accretion behavior and radiation features in these states, which helps us to better understand the evolution of binary supermassive black hole systems.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Karina T. Voggel, Anil C. Seth, Holger Baumgardt, Bernd Husemann, Nadine Neumayer, Michael Hilker, Renuka Pechetti, Steffen Mieske, Antoine Dumont, Iskren Georgiev
Summary: A dual supermassive black hole system was discovered in NGC 7727, with one located at the optical center of the galaxy and the other offset from the main nucleus by 500pc.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Jaya Maithil, Michael S. Brotherton, Ohad Shemmer, Pu Du, Jian-Min Wang, Adam D. Myers, Jacob N. McLane, Cooper Dix, Brandon M. Matthews
Summary: Accurately determining black hole masses and accretion rates is crucial for understanding quasars. Using an updated radius-luminosity relationship that incorporates the flux ratio of optical Fe II to H beta (R-Fe) to correct for bias, this study shows that failure to use an Fe-corrected radius predictor results in overestimated black hole masses and underestimated accretion rates for highly accreting quasars.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Alister W. Graham
Summary: The scatter about the M-bh-(sigma) relation is explained by using the virial theorem. It is shown that galaxy mergers also play a significant role, leading to different trajectories in the M-bh-(sigma) diagram. This result complements the AGN feedback models and has implications for gravitational-wave research.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
M. Frigo, T. Naab, A. Rantala, P. H. Johansson, B. Neureiter, J. Thomas, F. Rizzuto
Summary: The study demonstrates that the change in velocity anisotropy in the central regions of massive elliptical galaxies is mainly due to slingshot kicks generated by supermassive black holes attracting nearby stars, which significantly affects the orbital structure of galaxies over millions of years.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Matthew T. Scoggins, Zoltan Haiman, John H. Wise
Summary: The existence of 10^9 M_sun supermassive black holes (SMBHs) within the first billion years of the Universe challenges our understanding of black hole formation and growth. Heavy seed formation pathways could lead to overly massive BH galaxies (OMBGs) with black hole-to-stellar mass ratios (M_bh/M_*) well above typical values. By studying two identified OMBGs in the Renaissance simulations, it is found that these newborn BHs remain outliers in the M_bh - M_* relation until they merge with more massive haloes at around z ≈ 8.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Alister W. Graham, Nandini Sahu
Summary: We reveal the distinct, superlinear relations in the M-bh-M-*,M-sph diagram for bulges and elliptical galaxies, and show that the lower M-bh/M-*,M-sph ratios in the elliptical galaxies are due to dry mergers. We present a more nuanced picture, discussing how galaxy mergers with net orbital angular momentum can lead to systems with a rotating disc. We introduce new galaxy types and present a new merger-built relation in the M-bh-M-*,M-sph diagram.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Aline Chu, Pierre Boldrini, Joe Silk
Summary: Supermassive black holes (SMBHs) at the center of brightest cluster galaxies (BCGs) can be displaced from the central region due to mergers with satellite galaxies, leading to the quenching of black hole growth and feedback.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Alessandro Capetti, Ari Laor, Ranieri D. Baldi, Andrew Robinson, Alessandro Marconi
Summary: The study reveals that both continuum and Hα polarization are produced by the same scattering medium, which is located equatorially and perpendicular to the system axis, either at or near the BLR. Both continuum polarization and Hα polarization angle swing can serve as inclination indicators, while the observed line width may be affected by inclination and lead to underestimation of black hole mass estimates. The line width measured in the polarized flux overcomes this inclination bias, providing a nearly equatorial view of the BLR and reducing inclination bias in black hole mass estimates based on the BLR.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Kayhan Gultekin, Kristina Nyland, Nichole Gray, Greg Fehmer, Tianchi Huang, Matthew Sparkman, Amy E. Reines, Jenny E. Greene, Edward M. Cackett, Vivienne Baldassare
Summary: We present new observational results on eight active intermediate-mass black holes. By combining our data with other measurements, we find that the sources can be placed on the Fundamental Plane of black hole accretion. However, there are variations in the agreement with the Fundamental Plane for different types of sources classified based on optical emission line ratios. Therefore, additional constraints are needed when estimating masses.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Lindsey Byrne, Claude-Andre Faucher-Giguere, Jonathan Stern, Daniel Angles-Alcazar, Sarah Wellons, Alexander B. Gurvich, Philip F. Hopkins
Summary: Several recent simulations of galaxy formation have predicted two main phases of supermassive black hole (BH) accretion: an early, highly intermittent phase, followed by a phase of accelerated growth. This study explores the physical factors that drive the transition in BH accretion through cosmological zoom-in simulations, ranging from dwarf galaxies to those large enough to host luminous quasars. The results reveal that various properties, such as halo mass, galaxy stellar mass, and depth of the central gravitational potential, correlate with accelerated BH fuelling.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Jin Wu, Yue Shen, Linhua Jiang, Eduardo Banados, Xiaohui Fan, Luis C. Ho, Marianne Vestergaard, Feige Wang, Shu Wang, Xue-Bing Wu, Jinyi Yang
Summary: We study the demographics of z similar to 6 broad-line quasars in the black hole (BH) mass-luminosity plane using a sample of more than 100 quasars at 5.7 < z < 6.5. We find significant differences between the intrinsic and observed distributions of the quantities due to measurement uncertainties and sample flux limits. Our models provide reliable constraints on the z similar to 6 BH mass function and the intrinsic Eddington ratio distribution of M-BH > 10(8.5) M-circle dot quasars. Our results also suggest that the number densities of more massive BHs tend to decline more rapidly with increasing redshift.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
S. I. Raimundo, R. I. Davies, R. E. A. Canning, A. Celotti, A. C. Fabian, P. Gandhi
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2017)
Article
Astronomy & Astrophysics
M. C. Johnson, F. Dai, A. B. Justesen, D. Gandolfi, A. P. Hatzes, G. Nowak, M. Endl, W. D. Cochran, D. Hidalgo, N. Watanabe, H. Parviainen, T. Hirano, S. Villanueva, J. Prieto-Arranz, N. Narita, E. Palle, E. W. Guenther, O. Barragan, T. Trifonov, P. Niraula, P. J. MacQueen, J. Cabrera, Sz. Csizmadia, Ph. Eigmueller, S. Grziwa, J. Korth, M. Paetzold, A. M. S. Smith, S. Albrecht, R. Alonso, H. Deeg, A. Erikson, M. Esposito, M. Fridlund, A. Fukui, N. Kusakabe, M. Kuzuhara, J. Livingston, P. Montanes Rodriguez, D. Nespral, C. M. Persson, T. Purismo, S. Raimundo, H. Rauer, I. Ribas, M. Tamura, V. Van Eylen, J. N. Winn
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2018)
Article
Astronomy & Astrophysics
S. I. Raimundo, M. Vestergaard, J. Y. Koay, D. Lawther, V. Casasola, B. M. Peterson
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2019)
Article
Astronomy & Astrophysics
A. Alonso-Herrero, S. Garcia-Burillo, M. Pereira-Santaella, R. Davies, F. Combes, M. Vestergaard, S. Raimundo, A. Bunker, T. Diaz-Santos, P. Gandhi, I Garcia-Bernete, E. K. S. Hicks, S. F. Honig, L. K. Hunt, M. Imanishi, T. Izumi, N. A. Levenson, W. Maciejewski, C. Packham, C. Ramos Almeida, C. Ricci, D. Rigopoulou, P. F. Roche, D. Rosario, M. Schartmann, A. Usero, M. J. Ward
ASTRONOMY & ASTROPHYSICS
(2019)
Article
Astronomy & Astrophysics
S. Raimundo, A. Pancoast, M. Vestergaard, M. R. Goad, A. J. Barth
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2019)
Article
Astronomy & Astrophysics
S. Raimundo, M. Vestergaard, M. R. Goad, C. J. Grier, P. R. Williams, B. M. Peterson, T. Treu
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2020)
Article
Astronomy & Astrophysics
Matteo Bonetti, Elisa Bortolas, Alessandro Lupi, Massimo Dotti, Sandra Raimundo
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2020)
Article
Astronomy & Astrophysics
L. Izzo, K. Auchettl, J. Hjorth, F. De Colle, C. Gall, C. R. Angus, S. Raimundo, E. Ramirez-Ruiz
ASTRONOMY & ASTROPHYSICS
(2020)
Article
Astronomy & Astrophysics
Georgios Dimitriadis, Ryan J. Foley, Nikki Arendse, David A. Coulter, Wynn Jacobson-Galan, Matthew R. Siebert, Luca Izzo, David O. Jones, Charles D. Kilpatrick, Yen-Chen Pan, Kirsty Taggart, Katie Auchettl, Christa Gall, Jens Hjorth, Daniel Kasen, Anthony L. Piro, Sandra Raimundo, Enrico Ramirez-Ruiz, Armin Rest, Jonathan J. Swift, Stan E. Woosley
Summary: This paper presents the photometric and spectroscopic observations of SN 2020esm, a type Ia supernova. The early spectra of SN 2020esm show a nearly pure carbon/oxygen atmosphere, indicating pristine material relatively unaffected by nuclear burning. Modeling its light curve reveals an ejecta mass in excess of the Chandrasekhar mass.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
D. Lawther, M. Vestergaard, S. Raimundo, J. Y. Koay, B. M. Peterson, X. Fan, D. Grupe, S. Mathur
Summary: Mrk 590 is a changing-look AGN that turned off in 2012 and partially re-ignited into a repeat flaring state in 2017. Swift observations reveal higher X-ray and UV variability amplitudes compared to "steady-state" AGN, indicating a complicated reprocessing geometry. The X-rays are reprocessed by two UV components, with the dominant one at a lag of approximately 3 days and a faint additional reprocessor. The observed flares display characteristic time-scales consistent with thermal time-scale in an accretion disc.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
C. R. Angus, V. F. Baldassare, B. Mockler, R. J. Foley, E. Ramirez-Ruiz, S. Raimundo, K. D. French, K. Auchettl, H. Pfister, C. Gall, J. Hjorth, M. R. Drout, K. D. Alexander, G. Dimitriadis, T. Hung, D. O. Jones, A. Rest, M. R. Siebert, K. Taggart, G. Terreran, S. Tinyanont, C. M. Carroll, L. DeMarchi, N. Earl, A. Gagliano, L. Izzo, V. A. Villar, Y. Zenati, N. Arendse, C. Cold, T. J. L. de Boer, K. C. Chambers, D. A. Coulter, N. Khetan, C. C. Lin, E. A. Magnier, C. Rojas-Bravo, R. J. Wainscoat, R. Wojtak
Summary: Massive black holes are commonly found in the centers of massive galaxies, but their presence in dwarf galaxies is not yet known. AT 2020neh is a fast-rising tidal disruption event candidate hosted by a dwarf galaxy, which provides a potential method of measuring the masses of intermediate-mass black holes. The observable rate of such events is found to be low, which highlights the importance of finding non-accreting black holes in dwarf galaxies and understanding their prevalence within these galaxies.
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
Sandra I. Raimundo
FRONTIERS IN ASTRONOMY AND SPACE SCIENCES
(2018)
Article
Astronomy & Astrophysics
D. O. Jones, R. J. Foley, G. Narayan, J. Hjorth, M. E. Huber, P. D. Aleo, K. D. Alexander, C. R. Angus, K. Auchettl, V. F. Baldassare, S. H. Bruun, K. C. Chambers, D. Chatterjee, D. L. Coppejans, D. A. Coulter, L. DeMarchi, G. Dimitriadis, M. R. Drout, A. Engel, K. D. French, A. Gagliano, C. Gall, T. Hung, L. Izzo, W. V. Jacobson-Galan, C. D. Kilpatrick, H. Korhonen, R. Margutti, S. I. Raimundo, E. Ramirez-Ruiz, A. Rest, C. Rojas-Bravo, M. R. Siebert, S. J. Smartt, K. W. Smith, G. Terreran, Q. Wang, R. Wojtak, A. Agnello, Z. Ansari, N. Arendse, A. Baldeschi, P. K. Blanchard, D. Brethauer, J. S. Bright, J. S. Brown, T. J. L. de Boer, S. A. Dodd, J. R. Fairlamb, C. Grillo, A. Hajela, C. Hede, A. N. Kolborg, J. A. P. Law-Smith, C. -C. Lin, E. A. Magnier, K. Malanchev, D. Matthews, B. Mockler, D. Muthukrishna, Y. -C. Pan, H. Pfister, D. K. Ramanah, S. Rest, A. Sarangi, S. L. Schroder, C. Stauffer, M. C. Stroh, K. L. Taggart, S. Tinyanont, R. J. Wainscoat
Summary: The Young Supernova Experiment (YSE) is a novel optical time-domain survey designed to discover fast-rising supernovae within a few hours to days of explosion. The survey has already discovered or observed around 8.3% of transient candidates reported in 2020 to the International Astronomical Union, and aims to find approximately 5000 new SNe per year in the future.
ASTROPHYSICAL JOURNAL
(2021)