Zobrazeno 1 - 10
of 282
pro vyhledávání: '"S, Brotherton"'
Autor:
Hagai Netzer, Michael R. Goad, Aaron J. Barth, Edward M. Cackett, Keith Horne, Chen Hu, Erin Kara, Kirk T. Korista, Gerard A. Kriss, Collin Lewin, John Montano, Nahum Arav, Ehud Behar, Michael S. Brotherton, Doron Chelouche, Gisella De Rosa, Elena Dalla Bontà, Maryam Dehghanian, Gary J. Ferland, Carina Fian, Yasaman Homayouni, Dragana Ilić, Shai Kaspi, Andjelka B. Kovačević, Hermine Landt, Luka Č. Popović, Thaisa Storchi-Bergmann, Jian-Min Wang, Fatima Zaidouni
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 59 (2024)
The local ( z = 0.0315) active galactic nucleus (AGN) Mrk 817 was monitored over more than 500 days with space-borne and ground-based instruments as part of a large international campaign, AGN STORM 2. Here, we present a comprehensive analysis of the
Externí odkaz:
https://doaj.org/article/596cf6efe99e41ea86147f8aecdb6746
Autor:
Zhu-Heng Yao, Sen Yang, Wei-Jian Guo, Yong-Jie Chen, Yu-Yang Songsheng, Dong-Wei Bao, Bo-Wei Jiang, Yi-Lin Wang, Hao Zhang, Chen Hu, Yan-Rong Li, Pu Du, Ming Xiao, Jin-Ming Bai, Luis C. Ho, Michael S. Brotherton, Jesús Aceituno, Hartmut Winkler, Jian-Min Wang, Seambh Collaboration
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 41 (2024)
Over the past three decades, multiple reverberation mapping (RM) campaigns conducted for the quasar PG 2130+099 have exhibited inconsistent findings with time delays ranging from ∼10 to ∼200 days. To achieve a comprehensive understanding of the g
Externí odkaz:
https://doaj.org/article/d16b3819f3c94aebb73f125a38af40ec
Autor:
Collin Lewin, Erin Kara, Aaron J. Barth, Edward M. Cackett, Gisella De Rosa, Yasaman Homayouni, Keith Horne, Gerard A. Kriss, Hermine Landt, Jonathan Gelbord, John Montano, Nahum Arav, Misty C. Bentz, Benjamin D. Boizelle, Elena Dalla Bontà, Michael S. Brotherton, Maryam Dehghanian, Gary J. Ferland, Carina Fian, Michael R. Goad, Juan V. Hernández Santisteban, Dragana Ilić, Jelle Kaastra, Shai Kaspi, Kirk T. Korista, Peter Kosec, Andjelka Kovačević, Missagh Mehdipour, Jake A. Miller, Hagai Netzer, Jack M. M. Neustadt, Christos Panagiotou, Ethan R. Partington, Luka Č. Popović, David Sanmartim, Marianne Vestergaard, Martin J. Ward, Fatima Zaidouni
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 271 (2024)
X-ray reverberation mapping is a powerful technique for probing the innermost accretion disk, whereas continuum reverberation mapping in the UV, optical, and infrared (UVOIR) reveals reprocessing by the rest of the accretion disk and broad-line regio
Externí odkaz:
https://doaj.org/article/3099863b0ddf458286f4821ab7d44ea7
Autor:
Fatima Zaidouni, Erin Kara, Peter Kosec, Missagh Mehdipour, Daniele Rogantini, Gerard A. Kriss, Ehud Behar, Jelle Kaastra, Aaron J. Barth, Edward M. Cackett, Gisella De Rosa, Yasaman Homayouni, Keith Horne, Hermine Landt, Nahum Arav, Misty C. Bentz, Michael S. Brotherton, Elena Dalla Bontà, Maryam Dehghanian, Gary J. Ferland, Carina Fian, Jonathan Gelbord, Michael R. Goad, Diego H. González Buitrago, Catherine J. Grier, Patrick B. Hall, Chen Hu, Dragana Ilić, Shai Kaspi, Christopher S. Kochanek, Andjelka B. Kovačević, Daniel Kynoch, Collin Lewin, John Montano, Hagai Netzer, Jack M. M. Neustadt, Christos Panagiotou, Ethan R. Partington, Rachel Plesha, Luka Č. Popović, Daniel Proga, Thaisa Storchi-Bergmann, David Sanmartim, Matthew R. Siebert, Matilde Signorini, Marianne Vestergaard, Tim Waters, Ying Zu
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 91 (2024)
We present the results of the XMM-Newton and NuSTAR observations taken as part of the ongoing, intensive multiwavelength monitoring program of the Seyfert 1 galaxy Mrk 817 by the AGN Space Telescope and Optical Reverberation Mapping 2 (AGN STORM 2) P
Externí odkaz:
https://doaj.org/article/72a0395dcbd8439787caa0ce7414fef7
Autor:
Maryam Dehghanian, Nahum Arav, Gerard A. Kriss, Missagh Mehdipour, Doyee Byun, Gwen Walker, Mayank Sharma, Aaron J. Barth, Misty C. Bentz, Benjamin D. Boizelle, Michael S. Brotherton, Edward M. Cackett, Elena Dalla Bontà, Gisella De Rosa, Gary J. Ferland, Carina Fian, Alexei V. Filippenko, Jonathan Gelbord, Michael R. Goad, Keith Horne, Yasaman Homayouni, Dragana Ilić, Michael D. Joner, Erin A. Kara, Shai Kaspi, Christopher S. Kochanek, Kirk T. Korista, Peter Kosec, Andjelka B. Kovačević, Hermine Landt, Collin Lewin, Ethan R. Partington, Luka Č. Popović, Daniel Proga, Daniele Rogantini, Matthew R. Siebert, Thaisa Storchi-Bergmann, Marianne Vestergaard, Timothy. Waters, Jian-Min Wang, Fatima Zaidouni, Ying Zu
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 141 (2024)
We observed the Seyfert 1 galaxy Mrk 817 during an intensive multiwavelength reverberation mapping campaign for 16 months. Here, we examine the behavior of narrow UV absorption lines seen in the Hubble Space Telescope/Cosmic Origins Spectrograph spec
Externí odkaz:
https://doaj.org/article/966715f4b45648b0b888fce09ba23e41
Autor:
Harum Ahmed, Ohad Shemmer, Brandon Matthews, Cooper Dix, Trung Ha, Gordon T. Richards, Michael S. Brotherton, Adam D. Myers, W. N. Brandt, Sarah C. Gallagher, Richard Green, Paulina Lira, Jacob N. McLane, Richard M. Plotkin, Donald P. Schneider
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 2, p 77 (2024)
We present the rest-frame ultraviolet−optical spectral properties of 65 broad absorption line (BAL) quasars from the Gemini Near Infrared Spectrograph−Distant Quasar Survey (GNIRS-DQS). These properties are compared with those of 195 non-BAL quas
Externí odkaz:
https://doaj.org/article/698789954ff54b2c818a90fbde2d6efd
Autor:
T. E. Zastrocky, Michael S. Brotherton, Pu Du, Jacob N. McLane, Kianna A. Olson, D. A. Dale, H. A. Kobulnicky, Jaya Maithil, My L. Nguyen, William T. Chick, David H. Kasper, Derek Hand, C. Adelman, Z. Carter, G. Murphree, M. Oeur, T. Roth, S. Schonsberg, M. J. Caradonna, J. Favro, A. J. Ferguson, I. M. Gonzalez, L. M. Hadding, H. D. Hagler, C. J. Rogers, T. R. Stack, Franklin Chapman, Dong-Wei Bao, Feng-Na Fang, Shuo Zhai, Sen Yang, Yong-Jie Chen, Hua-Rui Bai, Yi-Xin Fu, Jun-Rong Liu, Zhu-Heng Yao, Yue-Chang Peng, Yu-Yang Songsheng, Yan-Rong Li, Jin-Ming Bai, Chen Hu, Ming Xiao, Luis C. Ho, Jian-Min Wang
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 272, Iss 2, p 29 (2024)
We report first-time reverberation-mapping results for 14 active galactic nuclei (AGNs) from the ongoing Monitoring AGNs with H β Asymmetry campaign (MAHA). These results utilize optical spectra obtained with the Long Slit Spectrograph on the Wyomin
Externí odkaz:
https://doaj.org/article/083e7e8b79bc4fef990c806f4d6e2c08
Autor:
Y. Homayouni, Gerard A. Kriss, Gisella De Rosa, Rachel Plesha, Edward M. Cackett, Michael R. Goad, Kirk T. Korista, Keith Horne, Travis Fischer, Tim Waters, Aaron J. Barth, Erin A. Kara, Hermine Landt, Nahum Arav, Benjamin D. Boizelle, Misty C. Bentz, Michael S. Brotherton, Doron Chelouche, Elena Dalla Bontà, Maryam Dehghanian, Pu Du, Gary J. Ferland, Carina Fian, Jonathan Gelbord, Catherine J. Grier, Patrick B. Hall, Chen Hu, Dragana Ilić, Michael D. Joner, Jelle Kaastra, Shai Kaspi, Andjelka B. Kovačević, Daniel Kynoch, Yan-Rong Li, Missagh Mehdipour, Jake A. Miller, Jake Mitchell, John Montano, Hagai Netzer, J. M. M. Neustadt, Ethan Partington, Luka Č. Popović, Daniel Proga, Thaisa Storchi-Bergmann, David Sanmartim, Matthew R. Siebert, Tommaso Treu, Marianne Vestergaard, Jian-Min Wang, Martin J. Ward, Fatima Zaidouni, Ying Zu
Publikováno v:
The Astrophysical Journal, Vol 963, Iss 2, p 123 (2024)
An intensive reverberation mapping campaign of the Seyfert 1 galaxy Mrk 817 using the Cosmic Origins Spectrograph on the Hubble Space Telescope revealed significant variations in the response of broad UV emission lines to fluctuations in the continuu
Externí odkaz:
https://doaj.org/article/316614fb5a9e43ee843eceed4152da03
Autor:
Cooper Dix, Brandon Matthews, Ohad Shemmer, Michael S. Brotherton, Adam D. Myers, I. Andruchow, W. N. Brandt, Gabriel A. Ferrero, Richard Green, Paulina Lira, Richard M. Plotkin, Gordon T. Richards, Donald P. Schneider
Publikováno v:
The Astrophysical Journal, Vol 950, Iss 2, p 96 (2023)
The most reliable single-epoch supermassive black hole mass ( M _BH ) estimates in quasars are obtained by using the velocity widths of low-ionization emission lines, typically the H β λ 4861 line. Unfortunately, this line is redshifted out of the
Externí odkaz:
https://doaj.org/article/3a5e84931fd54c90b89f5fb52e163430
Autor:
Brandon M. Matthews, Cooper Dix, Ohad Shemmer, Michael S. Brotherton, Adam D. Myers, I. Andruchow, W. N. Brandt, S. C. Gallagher, Richard Green, Paulina Lira, Jacob N. McLane, Richard M. Plotkin, Gordon T. Richards, Jessie C. Runnoe, Donald P. Schneider, Michael A. Strauss
Publikováno v:
The Astrophysical Journal, Vol 950, Iss 2, p 95 (2023)
Quasars at z ≳ 1 most often have redshifts measured from rest-frame ultraviolet emission lines. One of the most common such lines, C iv λ 1549, shows blueshifts up to ≈5000 km s ^−1 and in rare cases even higher. This blueshifting results in h
Externí odkaz:
https://doaj.org/article/25062c2fd73c4711a5938a3a6307e406