AGN STORM 2. VII. A Frequency-resolved Map of the Accretion Disk in Mrk 817: Simultaneous X-ray Reverberation and UVOIR Disk Reprocessing Time Lags
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2024
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866909370121453568 |
|---|---|
| author | Lewin, Collin Kara, Erin Barth, Aaron J. Cackett, Edward M. De Rosa, Gisella Homayouni, Yasaman Horne, Keith Kriss, Gerard A. Landt, Hermine Gelbord, Jonathan Montano, John Arav, Nahum Bentz, Misty C. Boizelle, Benjamin D. Bontà, Elena Dalla Brotherton, Michael S. Dehghanian, Maryam Ferland, Gary J. Fian, Carina Goad, Michael R. Santisteban, Juan V. Hernández Ilić, Dragana Kaastra, Jelle Kaspi, Shai Korista, Kirk T. Kosec, Peter Kovačević, Andjelka Mehdipour, Missagh Miller, Jake A. Netzer, Hagai Neustadt, Jack M. M. Panagiotou, Christos Partington, Ethan R. Popović, Luka Č. Sanmartim, David Vestergaard, Marianne Ward, Martin J. Zaidouni, Fatima |
| author_facet | Lewin, Collin Kara, Erin Barth, Aaron J. Cackett, Edward M. De Rosa, Gisella Homayouni, Yasaman Horne, Keith Kriss, Gerard A. Landt, Hermine Gelbord, Jonathan Montano, John Arav, Nahum Bentz, Misty C. Boizelle, Benjamin D. Bontà, Elena Dalla Brotherton, Michael S. Dehghanian, Maryam Ferland, Gary J. Fian, Carina Goad, Michael R. Santisteban, Juan V. Hernández Ilić, Dragana Kaastra, Jelle Kaspi, Shai Korista, Kirk T. Kosec, Peter Kovačević, Andjelka Mehdipour, Missagh Miller, Jake A. Netzer, Hagai Neustadt, Jack M. M. Panagiotou, Christos Partington, Ethan R. Popović, Luka Č. Sanmartim, David Vestergaard, Marianne Ward, Martin J. Zaidouni, Fatima |
| contents | 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 region (BLR). We present the time lags of Mrk 817 as a function of temporal frequency measured from 14 months of high-cadence monitoring from Swift and ground-based telescopes, in addition to an XMM-Newton observation, as part of the AGN STORM 2 campaign. The XMM-Newton lags reveal the first detection of a soft lag in this source, consistent with reverberation from the innermost accretion flow. These results mark the first simultaneous measurement of X-ray reverberation and UVOIR disk reprocessing lags$\unicode{x2013}$effectively allowing us to map the entire accretion disk surrounding the black hole. Similar to previous continuum reverberation mapping campaigns, the UVOIR time lags arising at low temporal frequencies are longer than those expected from standard disk reprocessing by a factor of 2-3. The lags agree with the anticipated disk reverberation lags when isolating short-timescale variability, namely timescales shorter than the H$β$ lag. Modeling the lags requires additional reprocessing constrained at a radius consistent with the BLR size scale inferred from contemporaneous H$β$-lag measurements. When we divide the campaign light curves, the UVOIR lags show substantial variations, with longer lags measured when obscuration from an ionized outflow is greatest. We suggest that, when the obscurer is strongest, reprocessing by the BLR elongates the lags most significantly. As the wind weakens, the lags are dominated by shorter accretion disk lags. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_09115 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | AGN STORM 2. VII. A Frequency-resolved Map of the Accretion Disk in Mrk 817: Simultaneous X-ray Reverberation and UVOIR Disk Reprocessing Time Lags Lewin, Collin Kara, Erin Barth, Aaron J. Cackett, Edward M. De Rosa, Gisella Homayouni, Yasaman Horne, Keith Kriss, Gerard A. Landt, Hermine Gelbord, Jonathan Montano, John Arav, Nahum Bentz, Misty C. Boizelle, Benjamin D. Bontà, Elena Dalla Brotherton, Michael S. Dehghanian, Maryam Ferland, Gary J. Fian, Carina Goad, Michael R. Santisteban, Juan V. Hernández Ilić, Dragana Kaastra, Jelle Kaspi, Shai Korista, Kirk T. Kosec, Peter Kovačević, Andjelka Mehdipour, Missagh Miller, Jake A. Netzer, Hagai Neustadt, Jack M. M. Panagiotou, Christos Partington, Ethan R. Popović, Luka Č. Sanmartim, David Vestergaard, Marianne Ward, Martin J. Zaidouni, Fatima High Energy Astrophysical Phenomena 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 region (BLR). We present the time lags of Mrk 817 as a function of temporal frequency measured from 14 months of high-cadence monitoring from Swift and ground-based telescopes, in addition to an XMM-Newton observation, as part of the AGN STORM 2 campaign. The XMM-Newton lags reveal the first detection of a soft lag in this source, consistent with reverberation from the innermost accretion flow. These results mark the first simultaneous measurement of X-ray reverberation and UVOIR disk reprocessing lags$\unicode{x2013}$effectively allowing us to map the entire accretion disk surrounding the black hole. Similar to previous continuum reverberation mapping campaigns, the UVOIR time lags arising at low temporal frequencies are longer than those expected from standard disk reprocessing by a factor of 2-3. The lags agree with the anticipated disk reverberation lags when isolating short-timescale variability, namely timescales shorter than the H$β$ lag. Modeling the lags requires additional reprocessing constrained at a radius consistent with the BLR size scale inferred from contemporaneous H$β$-lag measurements. When we divide the campaign light curves, the UVOIR lags show substantial variations, with longer lags measured when obscuration from an ionized outflow is greatest. We suggest that, when the obscurer is strongest, reprocessing by the BLR elongates the lags most significantly. As the wind weakens, the lags are dominated by shorter accretion disk lags. |
| title | AGN STORM 2. VII. A Frequency-resolved Map of the Accretion Disk in Mrk 817: Simultaneous X-ray Reverberation and UVOIR Disk Reprocessing Time Lags |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2409.09115 |