Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Laura Brenneman"'
Autor:
Miranda K. Zak, Jon M. Miller, Ehud Behar, W. N. Brandt, Laura Brenneman, Paul A. Draghis, Elias Kammoun, Michael J. Koss, Mark T. Reynolds, Abderahmen Zoghbi
Publikováno v:
The Astrophysical Journal Letters, Vol 962, Iss 1, p L1 (2024)
Mrk 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 in th
Externí odkaz:
https://doaj.org/article/15187765afc14cdc90bfc8b1c6285819
Autor:
David Bogensberger, Jon Miller, Elias Kammoun, Richard Mushotzky, Laura Brenneman, W. N. Brandt, Edward M. Cackett, Andrew Fabian, Jelle Kaastra, Shashank Dattathri, Ehud Behar, Abderahmen Zoghbi
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 2, p 150 (2024)
Cen A hosts the closest active galactic nucleus to the Milky Way, which makes it an ideal target for investigating the dynamical processes in the vicinity of accreting supermassive black holes. In this paper, we present 14 Chandra HETGS spectra of th
Externí odkaz:
https://doaj.org/article/63ffca335687435e89b0b857b80b6de7
Autor:
Laura Brenneman
Publikováno v:
Acta Polytechnica, Vol 53, Iss A (2013)
Measuring the spins of supermassive black holes (SMBHs) in active galactic nuclei (AGN) can inform us about the relative role of gas accretion vs. mergers in recent epochs of the life of the host galaxy and its AGN. Recent theoretical and observation
Externí odkaz:
https://doaj.org/article/513a2127aa8b49c89cc696e5e48a2f6a
Autor:
Matteo Guainazzi, Richard Willingale, Laura Brenneman, Esra Bulbul, Jan-Willem den Herder, Erik Kuulkers, Jan-Uwe Ness, Lorenzo Natalucci
Publikováno v:
Journal of Astronomical Telescopes, Instruments, and Systems. 8
Autor:
Randall K. Smith, Marshall Bautz, Joel Bregman, Laura Brenneman, Nancy Brickhouse, Esra Bulbul, Vadim Burwitz, Joseph Bushman, Claude Canizares, Deepto Chakrabarty, Peter Cheimets, Elisa Costantini, Casey DeRoo, Abe Falcone, Adam Foster, Luigi Gallo, Catherine Grant, Hans Guenther, Ralf Heilmann, Sarah Heine, Butler Hine, David Huenemoerder, Steve Jara, Jelle Kaastra, Erin Kara, Ingo Kreykenbohm, Kristin Madsen, Herman Marshall, Michael McDonald, Randall McEntaffer, Jon Miller, Eric Miller, Richard Mushotzky, Kirpal Nandra, Michael Nowak, Frederik Paerels, Robert Petre, Katja Poppenhaeger, Andrew Ptak, Paul Reid, Karolyn Ronzano, Agata Rozanska, Jenna Samra, Jeremy Sanders, Mark Schattenburg, Jonathan Schonfeld, Norbert Schulz, Alan Smale, Pasquale Temi, Lynne Valencic, Stephen Walker, Joern Wilms, Scott Wolk
Publikováno v:
Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray.
Autor:
Daniel Stern, Abderahmen Zoghbi, John C. Raymond, Anne M. Lohfink, Jon M. Miller, Ehud Behar, W. N. Brandt, D. Barret, P. Draghis, Mark Reynolds, Michael Koss, Laura Brenneman, E. Kammoun
Publikováno v:
Astrophys.J.Lett.
Astrophys.J.Lett., 2021, 911 (1), pp.L12. ⟨10.3847/2041-8213/abef6f⟩
Astrophys.J.Lett., 2021, 911 (1), pp.L12. ⟨10.3847/2041-8213/abef6f⟩
Accretion disks and coronae around massive black holes have been studied extensively, and they are known to be coupled. Over a period of 30 years, however, the X-ray (coronal) flux of Mrk 817 increased by a factor of 40 while its UV (disk) flux remai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50c98f5abfd8683956ef7d820975c8e7
Autor:
W. N. Brandt, Laura Brenneman, Jelle Kaastra, Abderahmen Zoghbi, Kyuseok Oh, Ehud Behar, Richard F. Mushotzky, Anne M. Lohfink, Michael Koss, E. S. Kammoun, Jonah Miller, Daniel Stern, Didier Barret, Daniel Proga
Publikováno v:
Astrophys.J.
Astrophys.J., 2020, 901 (2), pp.161. ⟨10.3847/1538-4357/abb29f⟩
Astrophys.J., 2020, 901 (2), pp.161. ⟨10.3847/1538-4357/abb29f⟩
We study the X-ray spectra of a sample of 19 obscured, optically-selected Seyfert galaxies (Sy 1.8, 1.9 and 2) in the local universe ($d \leq 175$~Mpc), drawn from the CfA Seyfert sample. Our analysis is driven by the high sensitivity of NuSTAR in th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4024e6c7b8a5faff77cad1b0d2f1cb9a
https://ui.adsabs.harvard.edu/abs/2020ApJ...901..161K
https://ui.adsabs.harvard.edu/abs/2020ApJ...901..161K
Autor:
Yutaka Fujita, Koji Mukai, Peter Shirron, Kumiko K. Nobukawa, Toshiaki Takeshima, Isamu Hatsukade, Richard F. Mushotzky, Brian J. Williams, Greg Brown, Hirofumi Noda, Brian Comber, Maria Diaz-Trigo, Manabu Ishida, Brian R. McNamara, Takahiro Sasaki, M. Ohno, Iurii Babyk, Richard L. Kelley, Sayuri Iga, Hiroshi Nakajima, Yuusuke Uchida, Hiroya Yamaguchi, Caroline A. Kilbourne, Takeshi Go Tsuru, Kosuke Sato, Tsunefumi Mizuno, Ryo Iizuka, Irina Zhuravleva, Shogo B. Kobayashi, Hironori Matsumoto, Matthew Holland, K. Matsuzaki, Makoto Sawada, Laura Brenneman, Susumu Yasuda, Shinya Yamada, Makoto Tashiro, Hirokazu Odaka, Yoshihiro Ueda, Keiichi Yanagase, Hiroki Akamatsu, Yasuharu Sugawara, Akihiro Furuzawa, Nobutaka Bando, Akio Hoshino, Koji Mori, Misaki Mizumoto, Lia Corrales, Katsuhiro Hayashi, Yasushi Fukazawa, Hideki Uchiyama, Hironori Maejima, Robert Petre, Yoshitaka Ishisaki, Teruaki Enoto, Mina Ogawa, Kenichi Toda, Natalie Hell, Shin'ichiro Uno, Tessei Yoshida, Thomas G. Bialas, Maurice A. Leutenegger, Masayuki Ohta, Yang Soong, Elisa Costantini, Kenji Hamaguchi, Shunji Kitamoto, Takafumi Horiuchi, Leslie Hartz, Luigi C. Gallo, Edmund Hodges-Kluck, Renata Cumbee, Yusuke Nishioka, Toshiki Sato, Paul P. Plucinsky, Katja Pottschmidt, Aya Kubota, Ehud Behar, Tom Lockard, Masanobu Ozaki, Kenji Minesugi, Ann Hornschemeier, T. R. Jaffe, Aurora Simionescu, Kazutaka Yamaoka, Stéphane Paltani, Keisuke Tamura, Chris Done, Makoto Yamauchi, Kouichi Hagino, Kosei Ishimura, Akihide Kobayashi, Eric J. Miller, Carlo Ferrigno, Hiromitsu Takahashi, Hiromi Seta, Nathalie Gorter, Cor P. de Vries, Michael J. Sampson, A. E. Szymkowiak, Mark O. Kimball, Gary A. Sneiderman, Dan McCammon, Meng P. Chiao, S. Eguchi, Randall K. Smith, Naoki Ishihama, Yohko Tsuboi, Jon M. Miller, Erin Kara, Takayoshi Kohmura, Timothy R. Kallman, Takashi Okajima, Kenichiro Nigo, Jan-Willem den Herder, Shigeo Yamauchi, Kazunori Someya, Maxim Markevitch, Yuto Ichinohe, M. C. Witthoeft, Yukikatsu Terada, Nasa Yoshioka, Edgar Canavan, Jelle Kaastra, Takao Kitaguchi, Masahiro Tsujimoto, Hideto Nakamura, Shinji Mitani, Hiroyuki Uchida, Masayoshi Nobukawa, R. Sato, Atsushi Tanimoto, Junko S. Hiraga, Keisuke Shinozaki, Yuichiro Ezoe, Hiroshi Tsunemi, Brian McLaughlin, Yasuko Shibano, Ikuyuki Mitsuishi, Matteo Guainazzi, Lillian Reichenthal, Yuichi Terashima, Kumi Ishikawa, Naomi Ota, Chikara Natsukari, Joseph Miko, Kiyoshi Hayashida, M. Loewenstein, Connor Martz, Tahir Yaqoob, D. Eckert, Ryuichi Fujimoto, Johannes Dercksen, Hiroshi Murakami, Hiroshi Tomida, Ken Ebisawa, Rob Wolfs, Martin Grim, Tomomi Watanabe, Marc Audard, Keisuke Sugawara, Yoh Takei, Megan E. Eckart, Takaya Ohashi, Atsushi Okamoto, Noriko Y. Yamasaki, Shin Watanabe, Yoshitomo Maeda, Shuhei Shigeto, Yoshitaka Arai, Maki Shida, Hisamitsu Awaki, Muzi Li, Takaaki Tanaka, Tadayasu Dotani, David Hawthorn, Jacco Vink, Joy Henegar-Leon, Rozenn Boissay-Malaquin, Kazuhiro Nakazawa, Aya Bamba, Megumi Shidatsu, Satoru Katsuda, Liyi Gu, Kyoko Matsushita, Toru Tamagawa, F. Scott Porter, Michael J. DiPirro, Steven Kenyon
Publikováno v:
Space Telescopes and Instrumentation 2020 : Ultraviolet to Gamma Ray: 14-18 December 2020, online only, California, United States, 1
The X-Ray Imaging and Spectroscopy Mission (XRISM) is the successor to the 2016 Hitomi mission that ended prematurely. Like Hitomi, the primary science goals are to examine astrophysical problems with precise highresolution X-ray spectroscopy. XRISM
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::584669694a480b163b59a24d5a15ac88
https://dare.uva.nl/personal/pure/en/publications/status-of-xray-imaging-and-spectroscopy-mission-xrism(68bf923f-f7e0-407f-b72e-012da2196903).html
https://dare.uva.nl/personal/pure/en/publications/status-of-xray-imaging-and-spectroscopy-mission-xrism(68bf923f-f7e0-407f-b72e-012da2196903).html
Autor:
Jon M. Miller, Marshall W. Bautz, Peter Cheimets, Laura Brenneman, David P. Huenemoerder, Eric J. Miller, Michael A. Nowak, Stephen Walker, Claude R. Canizares, Herman L. Marshall, Lynne A. Valencic, Nancy Brickhouse, Frits Paerels, Paul B. Reid, Joel N. Bregman, Jay Bookbinder, Michael McDonald, David N. Burrows, Abraham D. Falcone, Jonathan F. Schonfeld, Kirpal Nandra, H. Moritz Günther, Simon Dawson, Ralf K. Heilmann, Luigi C. Gallo, Kristin K. Madsen, I. Kreykenbohm, Catherine E. Grant, Karolyn Ronzano, Alan P. Smale, Michael McEachen, Jelle Kaastra, Richard F. Mushotzky, Mark L. Schattenburg, Steve Jara, Andrew Ptak, Joseph Bushman, Pasquale Temi, Scott J. Wolk, Casey T. DeRoo, Margaret H. Abraham, Norbert S. Schulz, Vadim Burwitz, Adam R. Foster, Randall L. McEntaffer, Robert Petre, Elisa Costantini, Jeremy S. Sanders, Deepto Chakrabarty, Katja Poppenhaeger, Richard Willingale, Grace Baird, Butler Hine, Elisabeth Morse, Joern Wilms, Randall K. Smith
Publikováno v:
UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXI.
Arcus provides high-resolution soft X-ray spectroscopy in the 12-50 Å bandpass with unprecedented sensitivity, including spectral resolution < 2500 and effective area < 250 cm^2. The three top science goals for Arcus are (1) to measure the effects o
Autor:
Richard F. Mushotzky, Abderahmen Zoghbi, Jelle Kaastra, Daniel Proga, E. S. Kammoun, Michael Koss, Daniel Stern, Kyuseok Oh, Laura Brenneman, Ehud Behar, Didier Barret, Anne M. Lohfink, Jonah Miller, W. N. Brandt
Publikováno v:
Astrophysical Journal (0004-637X)
Astrophys.J.
Astrophys.J., 2019, 877 (2), pp.102. ⟨10.3847/1538-4357/ab1c5f⟩
Astrophysical Journal (0004-637X), 877(2), 102
Astrophys.J.
Astrophys.J., 2019, 877 (2), pp.102. ⟨10.3847/1538-4357/ab1c5f⟩
Astrophysical Journal (0004-637X), 877(2), 102
Current measurements show that the observed fraction of Compton-thick (CT) AGN is smaller than the expected values needed to explain the cosmic X-ray background. Prior fits to the X-ray spectrum of the nearby Seyfert-2 galaxy NGC 5347 ($z=0.00792,\,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74ae5a0fc9e343e966aa61612281e949
https://hdl.handle.net/1887/83175
https://hdl.handle.net/1887/83175