Standard
AGN STORM 2. I. First results : A Change in the Weather of Mrk 817. / Kara, Erin; Mehdipour, Missagh; Kriss, Gerard A.; Cackett, Edward M.; Arav, Nahum; Barth, Aaron J.; Byun, Doyee; Brotherton, Michael S.; De Rosa, Gisella; Gelbord, Jonathan; Hernandez Santisteban, Juan V.; Hu, Chen; Kaastra, Jelle; Landt, Hermine; Li, Yan-Rong; Miller, Jake A.; Montano, John; Partington, Ethan; Aceituno, Jesus; Bai, Jin-Ming; Bao, Dongwei; Bentz, Misty C.; Brink, Thomas G.; Chelouche, Doron; Chen, Yong-Jie; Colmenero, Encarni Romero; Bonta, Elena Dalla; Dehghanian, Maryam; Du, Pu; Edelson, Rick; Ferland, Gary J.; Ferrarese, Laura; Fian, Carina; Filippenko, Alexei V.; Fischer, Travis; Goad, Michael R.; Gonzalez Buitrago, Diego H.; Gorjian, Varoujan; Grier, Catherine J.; Guo, Wei-Jian; Hall, Patrick B.; Ho, Luis C.; Homayouni, Y.; Horne, Keith; Ilic, Dragana; Jiang, Bo-Wei; Joner, Michael D.; Kaspi, Shai; Kochanek, Christopher S.; Korista, Kirk T.; Kynoch, Daniel; Li, Sha-Sha; Liu, Jun-Rong; cHardy, Ian M. M.; McLane, Jacob N.; Mitchell, Jake A. J.; Netzer, Hagai; Olson, Kianna A.; Pogge, Richard W.; Popovic, Luka C.; Proga, Daniel; Storchi-Bergmann, Thaisa; Strasburger, Erika; Treu, Tommaso; Vestergaard, Marianne; Wang, Jian-Min; Ward, Martin J.; Waters, Tim; Williams, Peter R.; Yang, Sen; Yao, Zhu-Heng; Zastrocky, Theodora E.; Zhai, Shuo; Zu, Ying.
In:
Astrophysical Journal, Vol. 922, No. 2, 151, 26.11.2021.
Research output: Contribution to journal › Journal article › Research › peer-review
Harvard
Kara, E, Mehdipour, M, Kriss, GA, Cackett, EM, Arav, N, Barth, AJ, Byun, D, Brotherton, MS, De Rosa, G, Gelbord, J, Hernandez Santisteban, JV, Hu, C, Kaastra, J, Landt, H, Li, Y-R, Miller, JA, Montano, J, Partington, E, Aceituno, J, Bai, J-M, Bao, D, Bentz, MC, Brink, TG, Chelouche, D, Chen, Y-J, Colmenero, ER, Bonta, ED, Dehghanian, M, Du, P, Edelson, R, Ferland, GJ, Ferrarese, L, Fian, C, Filippenko, AV, Fischer, T, Goad, MR, Gonzalez Buitrago, DH, Gorjian, V, Grier, CJ, Guo, W-J, Hall, PB, Ho, LC, Homayouni, Y, Horne, K, Ilic, D, Jiang, B-W, Joner, MD, Kaspi, S, Kochanek, CS, Korista, KT, Kynoch, D, Li, S-S, Liu, J-R, cHardy, IMM, McLane, JN, Mitchell, JAJ, Netzer, H, Olson, KA, Pogge, RW, Popovic, LC, Proga, D, Storchi-Bergmann, T, Strasburger, E, Treu, T
, Vestergaard, M, Wang, J-M, Ward, MJ, Waters, T, Williams, PR, Yang, S, Yao, Z-H, Zastrocky, TE, Zhai, S & Zu, Y 2021, '
AGN STORM 2. I. First results: A Change in the Weather of Mrk 817',
Astrophysical Journal, vol. 922, no. 2, 151.
https://doi.org/10.3847/1538-4357/ac2159APA
Kara, E., Mehdipour, M., Kriss, G. A., Cackett, E. M., Arav, N., Barth, A. J., Byun, D., Brotherton, M. S., De Rosa, G., Gelbord, J., Hernandez Santisteban, J. V., Hu, C., Kaastra, J., Landt, H., Li, Y-R., Miller, J. A., Montano, J., Partington, E., Aceituno, J., ... Zu, Y. (2021).
AGN STORM 2. I. First results: A Change in the Weather of Mrk 817.
Astrophysical Journal,
922(2), [151].
https://doi.org/10.3847/1538-4357/ac2159Vancouver
Kara E, Mehdipour M, Kriss GA, Cackett EM, Arav N, Barth AJ et al.
AGN STORM 2. I. First results: A Change in the Weather of Mrk 817.
Astrophysical Journal. 2021 Nov 26;922(2). 151.
https://doi.org/10.3847/1538-4357/ac2159Author
Kara, Erin ; Mehdipour, Missagh ; Kriss, Gerard A. ; Cackett, Edward M. ; Arav, Nahum ; Barth, Aaron J. ; Byun, Doyee ; Brotherton, Michael S. ; De Rosa, Gisella ; Gelbord, Jonathan ; Hernandez Santisteban, Juan V. ; Hu, Chen ; Kaastra, Jelle ; Landt, Hermine ; Li, Yan-Rong ; Miller, Jake A. ; Montano, John ; Partington, Ethan ; Aceituno, Jesus ; Bai, Jin-Ming ; Bao, Dongwei ; Bentz, Misty C. ; Brink, Thomas G. ; Chelouche, Doron ; Chen, Yong-Jie ; Colmenero, Encarni Romero ; Bonta, Elena Dalla ; Dehghanian, Maryam ; Du, Pu ; Edelson, Rick ; Ferland, Gary J. ; Ferrarese, Laura ; Fian, Carina ; Filippenko, Alexei V. ; Fischer, Travis ; Goad, Michael R. ; Gonzalez Buitrago, Diego H. ; Gorjian, Varoujan ; Grier, Catherine J. ; Guo, Wei-Jian ; Hall, Patrick B. ; Ho, Luis C. ; Homayouni, Y. ; Horne, Keith ; Ilic, Dragana ; Jiang, Bo-Wei ; Joner, Michael D. ; Kaspi, Shai ; Kochanek, Christopher S. ; Korista, Kirk T. ; Kynoch, Daniel ; Li, Sha-Sha ; Liu, Jun-Rong ; cHardy, Ian M. M. ; McLane, Jacob N. ; Mitchell, Jake A. J. ; Netzer, Hagai ; Olson, Kianna A. ; Pogge, Richard W. ; Popovic, Luka C. ; Proga, Daniel ; Storchi-Bergmann, Thaisa ; Strasburger, Erika ; Treu, Tommaso ; Vestergaard, Marianne ; Wang, Jian-Min ; Ward, Martin J. ; Waters, Tim ; Williams, Peter R. ; Yang, Sen ; Yao, Zhu-Heng ; Zastrocky, Theodora E. ; Zhai, Shuo ; Zu, Ying. / AGN STORM 2. I. First results : A Change in the Weather of Mrk 817. In: Astrophysical Journal. 2021 ; Vol. 922, No. 2.
Bibtex
@article{d133e22a66654923bc0be973461f2267,
title = "AGN STORM 2. I. First results: A Change in the Weather of Mrk 817",
abstract = "We present the first results from the ongoing, intensive, multiwavelength monitoring program of the luminous Seyfert 1 galaxy Mrk 817. While this active galactic nucleus was, in part, selected for its historically unobscured nature, we discovered that the X-ray spectrum is highly absorbed, and there are new blueshifted, broad, and narrow UV absorption lines, which suggest that a dust-free, ionized obscurer located at the inner broad-line region partially covers the central source. Despite the obscuration, we measure UV and optical continuum reverberation lags consistent with a centrally illuminated Shakura-Sunyaev thin accretion disk, and measure reverberation lags associated with the optical broad-line region, as expected. However, in the first 55 days of the campaign, when the obscuration was becoming most extreme, we observe a de-coupling of the UV continuum and the UV broad emission-line variability. The correlation recovered in the next 42 days of the campaign, as Mrk 817 entered a less obscured state. The short C iv and Ly alpha lags suggest that the accretion disk extends beyond the UV broad-line region.",
keywords = "ACTIVE GALACTIC NUCLEI, BROAD-LINE REGION, SUPERMASSIVE BLACK-HOLES, X-RAY REVERBERATION, DRIVEN DISK WINDS, SPACE TELESCOPE, ACCRETION-DISK, EMISSION-LINES, NGC 5548, LIGHT CURVES",
author = "Erin Kara and Missagh Mehdipour and Kriss, {Gerard A.} and Cackett, {Edward M.} and Nahum Arav and Barth, {Aaron J.} and Doyee Byun and Brotherton, {Michael S.} and {De Rosa}, Gisella and Jonathan Gelbord and {Hernandez Santisteban}, {Juan V.} and Chen Hu and Jelle Kaastra and Hermine Landt and Yan-Rong Li and Miller, {Jake A.} and John Montano and Ethan Partington and Jesus Aceituno and Jin-Ming Bai and Dongwei Bao and Bentz, {Misty C.} and Brink, {Thomas G.} and Doron Chelouche and Yong-Jie Chen and Colmenero, {Encarni Romero} and Bonta, {Elena Dalla} and Maryam Dehghanian and Pu Du and Rick Edelson and Ferland, {Gary J.} and Laura Ferrarese and Carina Fian and Filippenko, {Alexei V.} and Travis Fischer and Goad, {Michael R.} and {Gonzalez Buitrago}, {Diego H.} and Varoujan Gorjian and Grier, {Catherine J.} and Wei-Jian Guo and Hall, {Patrick B.} and Ho, {Luis C.} and Y. Homayouni and Keith Horne and Dragana Ilic and Bo-Wei Jiang and Joner, {Michael D.} and Shai Kaspi and Kochanek, {Christopher S.} and Korista, {Kirk T.} and Daniel Kynoch and Sha-Sha Li and Jun-Rong Liu and cHardy, {Ian M. M.} and McLane, {Jacob N.} and Mitchell, {Jake A. J.} and Hagai Netzer and Olson, {Kianna A.} and Pogge, {Richard W.} and Popovic, {Luka C.} and Daniel Proga and Thaisa Storchi-Bergmann and Erika Strasburger and Tommaso Treu and Marianne Vestergaard and Jian-Min Wang and Ward, {Martin J.} and Tim Waters and Williams, {Peter R.} and Sen Yang and Zhu-Heng Yao and Zastrocky, {Theodora E.} and Shuo Zhai and Ying Zu",
year = "2021",
month = nov,
day = "26",
doi = "10.3847/1538-4357/ac2159",
language = "English",
volume = "922",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "Institute of Physics Publishing, Inc",
number = "2",
}
RIS
TY - JOUR
T1 - AGN STORM 2. I. First results
T2 - A Change in the Weather of Mrk 817
AU - Kara, Erin
AU - Mehdipour, Missagh
AU - Kriss, Gerard A.
AU - Cackett, Edward M.
AU - Arav, Nahum
AU - Barth, Aaron J.
AU - Byun, Doyee
AU - Brotherton, Michael S.
AU - De Rosa, Gisella
AU - Gelbord, Jonathan
AU - Hernandez Santisteban, Juan V.
AU - Hu, Chen
AU - Kaastra, Jelle
AU - Landt, Hermine
AU - Li, Yan-Rong
AU - Miller, Jake A.
AU - Montano, John
AU - Partington, Ethan
AU - Aceituno, Jesus
AU - Bai, Jin-Ming
AU - Bao, Dongwei
AU - Bentz, Misty C.
AU - Brink, Thomas G.
AU - Chelouche, Doron
AU - Chen, Yong-Jie
AU - Colmenero, Encarni Romero
AU - Bonta, Elena Dalla
AU - Dehghanian, Maryam
AU - Du, Pu
AU - Edelson, Rick
AU - Ferland, Gary J.
AU - Ferrarese, Laura
AU - Fian, Carina
AU - Filippenko, Alexei V.
AU - Fischer, Travis
AU - Goad, Michael R.
AU - Gonzalez Buitrago, Diego H.
AU - Gorjian, Varoujan
AU - Grier, Catherine J.
AU - Guo, Wei-Jian
AU - Hall, Patrick B.
AU - Ho, Luis C.
AU - Homayouni, Y.
AU - Horne, Keith
AU - Ilic, Dragana
AU - Jiang, Bo-Wei
AU - Joner, Michael D.
AU - Kaspi, Shai
AU - Kochanek, Christopher S.
AU - Korista, Kirk T.
AU - Kynoch, Daniel
AU - Li, Sha-Sha
AU - Liu, Jun-Rong
AU - cHardy, Ian M. M.
AU - McLane, Jacob N.
AU - Mitchell, Jake A. J.
AU - Netzer, Hagai
AU - Olson, Kianna A.
AU - Pogge, Richard W.
AU - Popovic, Luka C.
AU - Proga, Daniel
AU - Storchi-Bergmann, Thaisa
AU - Strasburger, Erika
AU - Treu, Tommaso
AU - Vestergaard, Marianne
AU - Wang, Jian-Min
AU - Ward, Martin J.
AU - Waters, Tim
AU - Williams, Peter R.
AU - Yang, Sen
AU - Yao, Zhu-Heng
AU - Zastrocky, Theodora E.
AU - Zhai, Shuo
AU - Zu, Ying
PY - 2021/11/26
Y1 - 2021/11/26
N2 - We present the first results from the ongoing, intensive, multiwavelength monitoring program of the luminous Seyfert 1 galaxy Mrk 817. While this active galactic nucleus was, in part, selected for its historically unobscured nature, we discovered that the X-ray spectrum is highly absorbed, and there are new blueshifted, broad, and narrow UV absorption lines, which suggest that a dust-free, ionized obscurer located at the inner broad-line region partially covers the central source. Despite the obscuration, we measure UV and optical continuum reverberation lags consistent with a centrally illuminated Shakura-Sunyaev thin accretion disk, and measure reverberation lags associated with the optical broad-line region, as expected. However, in the first 55 days of the campaign, when the obscuration was becoming most extreme, we observe a de-coupling of the UV continuum and the UV broad emission-line variability. The correlation recovered in the next 42 days of the campaign, as Mrk 817 entered a less obscured state. The short C iv and Ly alpha lags suggest that the accretion disk extends beyond the UV broad-line region.
AB - We present the first results from the ongoing, intensive, multiwavelength monitoring program of the luminous Seyfert 1 galaxy Mrk 817. While this active galactic nucleus was, in part, selected for its historically unobscured nature, we discovered that the X-ray spectrum is highly absorbed, and there are new blueshifted, broad, and narrow UV absorption lines, which suggest that a dust-free, ionized obscurer located at the inner broad-line region partially covers the central source. Despite the obscuration, we measure UV and optical continuum reverberation lags consistent with a centrally illuminated Shakura-Sunyaev thin accretion disk, and measure reverberation lags associated with the optical broad-line region, as expected. However, in the first 55 days of the campaign, when the obscuration was becoming most extreme, we observe a de-coupling of the UV continuum and the UV broad emission-line variability. The correlation recovered in the next 42 days of the campaign, as Mrk 817 entered a less obscured state. The short C iv and Ly alpha lags suggest that the accretion disk extends beyond the UV broad-line region.
KW - ACTIVE GALACTIC NUCLEI
KW - BROAD-LINE REGION
KW - SUPERMASSIVE BLACK-HOLES
KW - X-RAY REVERBERATION
KW - DRIVEN DISK WINDS
KW - SPACE TELESCOPE
KW - ACCRETION-DISK
KW - EMISSION-LINES
KW - NGC 5548
KW - LIGHT CURVES
U2 - 10.3847/1538-4357/ac2159
DO - 10.3847/1538-4357/ac2159
M3 - Journal article
VL - 922
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 2
M1 - 151
ER -
