Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Guolo, Muryel"'
Autor:
Guolo, Muryel, Mummery, Andrew
We implement a standard thin disk model with the outer disk radius ($R_{\rm out}$) as a free parameter, integrating it into standard X-ray fitting package to enable self-consistent and simultaneous fitting of X-ray spectra and UV/optical/NIR photomet
Externí odkaz:
http://arxiv.org/abs/2408.17296
Autor:
Pasham, Dheeraj, Coughlin, Eric, Guolo, Muryel, Wevers, Thomas, Nixon, Chris, Hinkle, Jason T., Bandopadhyay, Ananya
The tidal disruption event (TDE) AT2018dyk/ASASSN-18UL showed a rapid dimming event 500 days after discovery, followed by a re-brightening roughly 700 days later. It has been hypothesized that this behavior results from a repeating partial TDE (rpTDE
Externí odkaz:
http://arxiv.org/abs/2406.18124
Autor:
Yao, Yuhan, Guolo, Muryel, Tombesi, Francesco, Li, Ruancun, Gezari, Suvi, García, Javier A., Dai, Lixin, Chornock, Ryan, Lu, Wenbin, Kulkarni, S. R., Gendreau, Keith C., Pasham, Dheeraj R., Cenko, S. Bradley, Kara, Erin, Margutti, Raffaella, Ajay, Yukta, Wevers, Thomas, Kwan, Tom M., Andreoni, Igor, Bloom, Joshua S., Drake, Andrew J., Graham, Matthew J., Hammerstein, Erica, Laher, Russ R., LeBaron, Natalie, Mahabal, Ashish A., O'Connor, Brendan, Purdum, Josiah, Ravi, Vikram, Sears, Huei, Sharma, Yashvi, Smith, Roger, Sollerman, Jesper, Somalwar, Jean J., Wold, Avery
We present the tidal disruption event (TDE) AT2022lri, hosted in a nearby ($\approx\!144$ Mpc) quiescent galaxy with a low-mass massive black hole ($10^4\,M_\odot < M_{\rm BH} < 10^6\,M_\odot$). AT2022lri belongs to the TDE-H+He subtype. More than 1
Externí odkaz:
http://arxiv.org/abs/2405.11343
Autor:
Pasham, Dheeraj R., Tombesi, Francesco, Sukova, Petra, Zajacek, Michal, Rakshit, Suvendu, Coughlin, Eric, Kosec, Peter, Karas, Vladimir, Masterson, Megan, Mummery, Andrew, Holoien, Thomas W. -S., Guolo, Muryel, Hinkle, Jason, Ripperda, Bart, Witzany, Vojtech, Shappee, Ben, Kara, Erin, Horesh, Assaf, van Velzen, Sjoert, Sfaradi, Itai, Kaplan, David L., Burger, Noam, Murphy, Tara, Remillard, Ronald, Steiner, James F., Wevers, Thomas, Arcodia, Riccardo, Buchner, Johannes, Merloni, Andrea, Malyali, Adam, Fabian, Andy, Fausnaugh, Michael, Daylan, Tansu, Altamirano, Diego, Payne, Anna, Ferrara, E. C.
Binaries containing a compact object orbiting a supermassive black hole are thought to be precursors of gravitational wave events, but their identification has been extremely challenging. Here, we report quasi-periodic variability in X-ray absorption
Externí odkaz:
http://arxiv.org/abs/2402.10140
Autor:
Pasham, Dheeraj R., Zajacek, Michal, Nixon, C. J., Coughlin, Eric R., Sniegowska, Marzena, Janiuk, Agnieszka, Czerny, Bozena, Wevers, Thomas, Guolo, Muryel, Ajay, Yukta, Loewenstein, Michael
An accretion disk formed around a supermassive black hole (SMBH) after it disrupts a star is expected to be initially misaligned with respect to the black hole's equatorial plane. This misalignment induces relativistic torques (the Lense-Thirring eff
Externí odkaz:
http://arxiv.org/abs/2402.09689
Autor:
Ajay, Yukta, Pasham, Dheeraj R., Wevers, Thomas, Coughlin, Eric R., Tombesi, Francesco, Guolo, Muryel, Steiner, James F.
ASASSN-14li is a low-redshift ($z= 0.0206$) tidal disruption event (TDE) that has been studied extensively across the entire electromagnetic spectrum, and has provided one of the most sensitive measurements of a TDE to-date. Its X-ray spectrum is sof
Externí odkaz:
http://arxiv.org/abs/2401.12908
Autor:
Zeltyn, Grisha, Trakhtenbrot, Benny, Eracleous, Michael, Yang, Qian, Green, Paul, Anderson, Scott F., LaMassa, Stephanie, Runnoe, Jessie, Assef, Roberto J., Bauer, Franz E., Brandt, W. N., Davis, Megan C., Frederick, Sara E., Fries, Logan B., Graham, Matthew J., Grogin, Norman A., Guolo, Muryel, Hernández-García, Lorena, Koekemoer, Anton M., Krumpe, Mirko, Liu, Xin, Martínez-Aldama, Mary Loli, Ricci, Claudio, Schneider, Donald P., Shen, Yue, Śniegowska, Marzena, Temple, Matthew J., Trump, Jonathan R., Xue, Yongquan, Brownstein, Joel R., Dwelly, Tom, Morrison, Sean, Bizyaev, Dmitry, Pan, Kaike, Kollmeier, Juna A.
Publikováno v:
ApJ 966 85 (2024)
"Changing-look" active galactic nuclei (CL-AGNs) challenge our basic ideas about the physics of accretion flows and circumnuclear gas around supermassive black holes. Using first-year Sloan Digital Sky Survey V (SDSS-V) repeated spectroscopy of nearl
Externí odkaz:
http://arxiv.org/abs/2401.01933
Autor:
Wang, Yanan, Pasham, Dheeraj R., Altamirano, Diego, Gurpide, Andres, Segura, Noel Castro, Middleton, Matthew, Ji, Long, del Palacio, Santiago, Guolo, Muryel, Gandhi, Poshak, Zhang, Shuang-Nan, Remillard, Ronald, Lin, Dacheng, Masterson, Megan, Baldi, Ranieri D., Tombesi, Francesco, Miller, Jon M., Zhang, Wenda, Sanna, Andrea
The tidal disruption of a star around a supermassive black hole (SMBH) offers a unique opportunity to study accretion onto a SMBH on a human-timescale. We present results from our 1000+ days NICER, Swift and Chandra monitoring campaign of AT 2019avd,
Externí odkaz:
http://arxiv.org/abs/2312.13543
Autor:
Somalwar, Jean J., Ravi, Vikram, Yao, Yuhan, Guolo, Muryel, Graham, Matthew, Hammerstein, Erica, Lu, Wenbin, Nicholl, Matt, Sharma, Yashvi, Stein, Robert, van Velzen, Sjoert, Bellm, Eric C., Coughlin, Michael W., Groom, Steven L., Masci, Frank J., Riddle, Reed
Tidal disruption events (TDEs) occur when a star enters the tidal radius of a supermassive black hole (SMBH). If the star only grazes the tidal radius, a fraction of the stellar mass will be accreted in a partial TDE (pTDE). The remainder can continu
Externí odkaz:
http://arxiv.org/abs/2310.03782
Autor:
Guolo, Muryel, Pasham, Dheeraj R., Zajaček, Michal, Coughlin, Eric R., Gezari, Suvi, Suková, Petra, Wevers, Thomas, Witzany, Vojtěch, Tombesi, Francesco, van Velzen, Sjoert, Alexander, Kate D., Yao, Yuhan, Arcodia, Riccardo, Karas, Vladimır, Miller-Jones, James, Remillard, Ronald, Gendreau, Keith, Ferrara, Elizabeth C.
Publikováno v:
Nat Astron (2024)
Galactic nuclei showing recurrent phases of activity and quiescence have recently been discovered, with recurrence times as short as a few hours to a day -- known as quasi-periodic X-ray eruption (QPE) sources -- to as long as hundreds to a thousand
Externí odkaz:
http://arxiv.org/abs/2309.03011