Zobrazeno 1 - 10
of 106
pro vyhledávání: '"Pasham, Dheeraj R."'
Some electromagnetic outbursts from the nuclei of distant galaxies have been found to repeat on months-to-years timescales, and each of these sources can putatively arise from the accretion flares generated through the repeated tidal stripping of a s
Externí odkaz:
http://arxiv.org/abs/2406.03675
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
Extreme-mass-ratio inspirals (EMRIs) are one of the primary targets for the recently adopted millihertz gravitational-wave (GW) observatory LISA. Some previous studies have argued that a fraction of all EMRIs form in matter-rich environments, and can
Externí odkaz:
http://arxiv.org/abs/2404.00941
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., Coughlin, Eric R., Zajacek, Michal, Linial, Itai, Sukova, Petra, Nixon, Christopher J., Janiuk, Agnieszka, Sniegowska, Marzena, Witzany, Vojtech, Karas, Vladimir, Krumpe, M., Altamirano, Diego, Wevers, Thomas, Arcodia, Riccardo
Quasi-periodic Eruptions (QPEs) represent a novel class of extragalactic X-ray transients that are known to repeat at roughly regular intervals of a few hours to days. Their underlying physical mechanism is a topic of heated debate, with most models
Externí odkaz:
http://arxiv.org/abs/2402.09690
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:
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:
Pinto, Ciro, Steiner, James F., Bodaghee, Arash, Chakraborty, Priyanka, Sobolewska, Malgosia, Pasham, Dheeraj R., Ogorzalek, Anna, Zuhone, John, Bogdan, Akos, Vogelsberger, Mark
Publikováno v:
Astron. Nachr., 2024, e20240027
We investigate outflows and the physics of super-Eddington versus sub-Eddington regimes in black hole systems. Our focus is on prospective science using next-generation high-resolution soft X-ray instruments. We highlight the properties of black hole
Externí odkaz:
http://arxiv.org/abs/2310.15997
Observations and theory suggest that core-collapse supernovae can span a range of explosion energies, and when sub-energetic, the shockwave initiating the explosion can decelerate to speeds comparable to the escape speed of the progenitor. In these c
Externí odkaz:
http://arxiv.org/abs/2310.10713