Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Draghis, P."'
Autor:
Xiang, Xin, Miller, Jon M., Zoghbi, Abderahmen, Reynolds, Mark T., Bogensberger, David, Dai, Lixin, Draghis, Paul A., Drake, Jeremy J., Godet, Olivier, Irwin, Jimmy A., Miller, Michael C., Mockler, Brenna E., Saxton, Richard, Webb, Natalie
Tidal disruption events (TDEs) can potentially probe low-mass black holes in host galaxies that might not adhere to bulge or stellar-dispersion relationships. At least initially, TDEs can also reveal super-Eddington accretion. X-ray spectroscopy can
Externí odkaz:
http://arxiv.org/abs/2407.04684
Autor:
Gediman, B., Miller, J. M., Zoghbi, A., Draghis, P., Arzoumanian, Z., Brandt, W. N ., Gendreau, K.
We report on a study of the narrow Fe K$\alpha$ line and reflection spectrum in the well-known Seyfert-2 AGN, NGC 4388. X-ray spectra summed from two extensive NICER monitoring campaigns, separated by years, show strong evidence of variation in the d
Externí odkaz:
http://arxiv.org/abs/2403.00926
Autor:
Zak, Miranda K., Miller, Jon M., Behar, Ehud, Brandt, William N., Brenneman, Laura, Draghis, Paul A., Kammoun, Elias, Koss, Michael J., Reynolds, Mark T., Zoghbi, Abderahmen
Markarian 817 is a bright and variable Seyfert-1.2 active galactic nucleus (AGN). X-ray monitoring of Mrk 817 with the Neil Gehrels Swift Observatory in 2022 revealed that the source flux had declined to a lower level than recorded at any prior point
Externí odkaz:
http://arxiv.org/abs/2312.06487
Autor:
Draghis, Paul A., Miller, Jon M., Costantini, Elisa, Gallo, Luigi C., Reynolds, Mark, Tomsick, John A., Zoghbi, Abderahmen
Publikováno v:
The Astrophysical Journal, 969:40 (20pp), 2024 July 1
We extend our recent work on black hole spin in X-ray binary systems to include an analysis of 189 archival NuSTAR observations from 24 sources. Using self-consistent data reduction pipelines, spectral models, and statistical techniques, we report an
Externí odkaz:
http://arxiv.org/abs/2311.16225
Autor:
Connors, Riley, Tomsick, John, Draghis, Paul, Coughenour, Benjamin, Shaw, Aarran, Garcia, Javier, Walton, Dominic, Madsen, Kristin, Stern, Daniel, Rodriguez, Nicole Cavero, Dauser, Thomas, Del Santo, Melania, Jiang, Jiachen, Krawczynski, Henric, Liu, Honghui, Neilsen, Joseph, Nowak, Michael, Pike, Sean, Santangelo, Andrea, Sridhar, Navin, West, Andrew, Wilms, Joern, Team, the HEX-P
Accretion is a universal astrophysical process that plays a key role in cosmic history, from the epoch of reionization to galaxy and stellar formation and evolution. Accreting stellar-mass black holes in X-ray binaries are one of the best laboratorie
Externí odkaz:
http://arxiv.org/abs/2311.04782
Autor:
Miller, J. M., Mockler, B., Ramirez-Ruiz, E., Draghis, P. A., Drake, J. J., Raymond, J., Reynolds, M. T., Xiang, X., Yun, S. -B., Zoghbi, A.
The proximity and duration of the tidal disruption event (TDE) ASASSN-14li led to the discovery of narrow, blue-shifted absorption lines in X-rays and UV. The gas seen in X-ray absorption is consistent with bound material close to the apocenter of el
Externí odkaz:
http://arxiv.org/abs/2308.10964
Autor:
Draghis, Paul A., Miller, Jon M., Brumback, McKinley C., Fabian, Andrew C., Tomsick, John A., Zoghbi, Abderahmen
The black hole candidate XTE J2012+381 underwent an outburst at the end of 2022. We analyzed 105 NICER observations and 2 NuSTAR observations of the source during the outburst. The NuSTAR observations of the $M \sim10M_\odot$ black hole indicate clea
Externí odkaz:
http://arxiv.org/abs/2307.06988
Autor:
Draghis, Paul A., Balakrishnan, Mayura, Miller, Jon M., Cackett, Edward, Fabian, Andrew C., Miller-Jones, James C. A., Ng, Mason, Raymond, John C., Reynolds, Mark, Zoghbi, Abderahmen
The origin and distribution of stellar-mass black hole spins are a rare window into the progenitor stars and supernova events that create them. Swift J1728.9-3613 is an X-ray binary, likely associated with the supernova remnant G351.9-0.9 (Balakrishn
Externí odkaz:
http://arxiv.org/abs/2303.04164
Autor:
Balakrishnan, Mayura, Draghis, Paul A., Miller, Jon M., Bright, Joe, Fender, Robert, Ng, Mason, Cackett, Edward, Fabian, Andrew, Kuntz, Kip, Miller-Jones, James C. A., Proga, Daniel, Ray, Paul S., Raymond, John, Reynolds, Mark, Zoghbi, Abderahmen
A number of neutron stars have been observed within the remnants of the core-collapse supernova explosions that created them. In contrast, black holes are not yet clearly associated with supernova remnants. Indeed, some observations suggest that blac
Externí odkaz:
http://arxiv.org/abs/2303.04159
Autor:
Javier A. García, Daniel Stern, Kristin Madsen, Miles Smith, Brian Grefenstette, Marco Ajello, Jason Alford, Adlyka Annuar, Matteo Bachetti, Mislav Baloković, Ricarda S. Beckmann, Stefano Bianchi, Daniela Biccari, Peter Boorman, Murray Brightman, Johannes Buchner, Esra Bulbul, Chien-Ting Chen, Francesca Civano, Joel Coley, Riley M. T. Connors, Melania Del Santo, Laura Di Gesu, Paul A. Draghis, P. Chris Fragile, Andrés Gúrpide, Manuele Gangi, Suvi Gezari, Fiona Harrison, Elias Kammoun, Giorgio Lanzuisi, Bret Lehmer, Anne Lohfink, Renee Ludlam, Stefano Marchesi, Lea Marcotulli, Raffaella Margutti, Megan Masterson, Andrea Merloni, Matthew Middleton, Kaya Mori, Alberto Moretti, Kirpal Nandra, Kerstin Perez, Ryan W. Pfeifle, Ciro Pinto, Joanna Piotrowska, Gabriele Ponti, Katja Pottschmidt, Peter Predehl, Simonetta Puccetti, Arne Rau, Stephen Reynolds, Andrea Santangelo, Daniele Spiga, John A. Tomsick, Núria Torres-Albà, Dominic J. Walton, Daniel Wilkins, Joern Wilms, Will Zhang, Xiurui Zhao
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 11 (2024)
To answer NASA’s call for a sensitive X-ray observatory in the 2030s, we present the High Energy X-ray Probe (HEX-P) mission concept. HEX-P is designed to provide the required capabilities to explore current scientific questions and make new discov
Externí odkaz:
https://doaj.org/article/a9115eae4e0d4da8b9a73e288ec48f9e
