AGN STORM 2. IX. Studying the Dynamics of the Ionized Obscurer in Mrk 817 with High-resolution X-Ray Spectroscopy

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 Bonta; Maryam Dehghanian; Gary J. Ferland; Carina Fian; Jonathan Gelbord; Michael R. Goad; Diego H. GonzAlez Buitrago; Catherine J. Grier; Patrick B. Hall; Chen Hu; Dragana Ilic; Shai Kaspi; Christopher S. Kochanek; Andjelka B. Kovacevic; Daniel Kynoch; Collin Lewin; John Montano; Hagai Netzer; Jack M.M. Neustadt; Christos Panagiotou; Ethan R. Partington; Rachel Plesha; Luka C. Popovic; Daniel Proga; Thaisa Storchi-Bergmann; David Sanmartim; Matthew R. Siebert; Matilde Signorini; Marianne Vestergaard; Tim Waters; Ying Zu

doi:10.3847/1538-4357/ad6771

AGN STORM 2. IX. Studying the Dynamics of the Ionized Obscurer in Mrk 817 with High-resolution X-Ray Spectroscopy

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 Bonta
, Maryam Dehghanian
, Gary J. Ferland

Carina Fian, Jonathan Gelbord, Michael R. Goad, Diego H. GonzAlez Buitrago, Catherine J. Grier, Patrick B. Hall, Chen Hu, Dragana Ilic, Shai Kaspi, Christopher S. Kochanek, Andjelka B. Kovacevic, Daniel Kynoch, Collin Lewin, John Montano, Hagai Netzer, Jack M.M. Neustadt, Christos Panagiotou, Ethan R. Partington, Rachel Plesha, Luka C. Popovic, Daniel Proga, Thaisa Storchi-Bergmann, David Sanmartim, Matthew R. Siebert, Matilde Signorini, Marianne Vestergaard, Tim Waters, Ying Zu

Producción científica: Article › revisión exhaustiva

7 Citas (Scopus)

Resumen

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) Project. The campaign revealed an unexpected and transient obscuring outflow, never before seen in this source. Of our four XMM-Newton/NuSTAR epochs, one fortuitously taken during a bright X-ray state has strong narrow absorption lines in the high-resolution grating spectra. From these absorption features, we determine that the obscurer is in fact a multiphase ionized wind with an outflow velocity of ∼5200 km s⁻¹, and for the first time find evidence for a lower ionization component with the same velocity observed in absorption features in the contemporaneous Hubble Space Telescope spectra. This indicates that the UV absorption troughs may be due to dense clumps embedded in diffuse, higher ionization gas responsible for the X-ray absorption lines of the same velocity. We observe variability in the shape of the absorption lines on timescales of hours, placing the variable component at roughly 1000 R _g if attributed to transverse motion along the line of sight. This estimate aligns with independent UV measurements of the distance to the obscurer suggesting an accretion disk wind at the inner broad line region. We estimate that it takes roughly 200 days for the outflow to travel from the disk to our line of sight, consistent with the timescale of the outflow's column density variations throughout the campaign.

Idioma original	English
Número de artículo	91
Publicación	Astrophysical Journal
Volumen	974
N.º	1
DOI	https://doi.org/10.3847/1538-4357/ad6771
Estado	Published - oct 1 2024

Nota bibliográfica

Publisher Copyright:
© 2024. The Author(s). Published by the American Astronomical Society.

Financiación

F.Z. and E.K. acknowledge support from NASA grant 80NSSC22K0570. P.K. acknowledges support from NASA through the NASA Hubble Fellowship grant HST-HF2-51534.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5-26555. E.B. is grateful for the hospitality of MKI, where this collaborative work took place. Research at UC Irvine was supported by NSF grant AST-1907290. H.L. acknowledges a Daphne Jackson Fellowship sponsored by the Science and Technology Facilities Council (STFC), UK. M.C.B. gratefully acknowledges support from the NSF through grant AST-2009230. D.I., A.B.K and L.C.P. acknowledge funding provided by the University of Belgrade-Faculty of Mathematics (contract No. 451-03-47/2023-01/200104) and Astronomical Observatory Belgrade (contract No. 451-03-47/2023-01/200002) through the grants by the Ministry of Science, Technological Development and Innovation of the Republic of Serbia. D.I. acknowledges the support of the Alexander von Humboldt Foundation. A.B.K. and L.C.P. thank the support of the Chinese Academy of Sciences President's International Fellowship Initiative (PIFI) for visiting scientists. C.S.K. is supported by NSF grant AST-2307385. M.V. gratefully acknowledges financial support from the Independent Research Fund Denmark via grant No. DFF 8021-00130. F.Z. and E.K. acknowledge support from NASA grant 80NSSC22K0570. P.K. acknowledges support from NASA through the NASA Hubble Fellowship grant HST-HF2-51534.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5-26555. E.B. is grateful for the hospitality of MKI, where this collaborative work took place. Research at UC Irvine was supported by NSF grant AST-1907290. H.L. acknowledges a Daphne Jackson Fellowship sponsored by the Science and Technology Facilities Council (STFC), UK. M.C.B. gratefully acknowledges support from the NSF through grant AST-2009230. D.I., A.B.K and L.C.P. acknowledge funding provided by the University of Belgrade–Faculty of Mathematics (contract No. 451-03-47/2023-01/200104) and Astronomical Observatory Belgrade (contract No. 451-03-47/2023-01/200002) through the grants by the Ministry of Science, Technological Development and Innovation of the Republic of Serbia. D.I. acknowledges the support of the Alexander von Humboldt Foundation. A.B.K. and L.C.P. thank the support of the Chinese Academy of Sciences President's International Fellowship Initiative (PIFI) for visiting scientists. C.S.K. is supported by NSF grant AST-2307385. M.V. gratefully acknowledges financial support from the Independent Research Fund Denmark via grant No. DFF 8021-00130.

Financiadores	Número del financiador
University of Belgrade-Faculty of Mathematics
Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja
Alexander von Humboldt-Stiftung
University of Belgrade	451-03-47/2023-01/200104
National Science Foundation Arctic Social Science Program	AST-1907290
Independent Research Fund Denmark	DFF 8021-00130
Astronomical Observatory Belgrade	451-03-47/2023-01/200002
National Aeronautics and Space Administration	80NSSC22K0570
Chinese Academy of Sciences	AST-2307385
Space Telescope Science Institute	NAS5-26555
Science and Technology Facilities Council	AST-2009230

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-4357/ad6771

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Zaidouni, F., Kara, E., Kosec, P., Mehdipour, M., Rogantini, D., Kriss, G. A., Behar, E., Kaastra, J., Barth, A. J., Cackett, E. M., De Rosa, G., Homayouni, Y., Horne, K., Landt, H., Arav, N., Bentz, M. C., Brotherton, M. S., Dalla Bonta, E., Dehghanian, M., ... Zu, Y. (2024). AGN STORM 2. IX. Studying the Dynamics of the Ionized Obscurer in Mrk 817 with High-resolution X-Ray Spectroscopy. Astrophysical Journal, 974(1), Artículo 91. https://doi.org/10.3847/1538-4357/ad6771

@article{8c4fd262f9e9432f8bb2ef4282fd957a,

title = "AGN STORM 2. IX. Studying the Dynamics of the Ionized Obscurer in Mrk 817 with High-resolution X-Ray Spectroscopy",

abstract = "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) Project. The campaign revealed an unexpected and transient obscuring outflow, never before seen in this source. Of our four XMM-Newton/NuSTAR epochs, one fortuitously taken during a bright X-ray state has strong narrow absorption lines in the high-resolution grating spectra. From these absorption features, we determine that the obscurer is in fact a multiphase ionized wind with an outflow velocity of ∼5200 km s−1, and for the first time find evidence for a lower ionization component with the same velocity observed in absorption features in the contemporaneous Hubble Space Telescope spectra. This indicates that the UV absorption troughs may be due to dense clumps embedded in diffuse, higher ionization gas responsible for the X-ray absorption lines of the same velocity. We observe variability in the shape of the absorption lines on timescales of hours, placing the variable component at roughly 1000 R g if attributed to transverse motion along the line of sight. This estimate aligns with independent UV measurements of the distance to the obscurer suggesting an accretion disk wind at the inner broad line region. We estimate that it takes roughly 200 days for the outflow to travel from the disk to our line of sight, consistent with the timescale of the outflow's column density variations throughout the campaign.",

author = "Fatima Zaidouni and Erin Kara and Peter Kosec and Missagh Mehdipour and Daniele Rogantini and Kriss, \{Gerard A.\} and Ehud Behar and Jelle Kaastra and Barth, \{Aaron J.\} and Cackett, \{Edward M.\} and \{De Rosa\}, Gisella and Yasaman Homayouni and Keith Horne and Hermine Landt and Nahum Arav and Bentz, \{Misty C.\} and Brotherton, \{Michael S.\} and \{Dalla Bonta\}, Elena and Maryam Dehghanian and Ferland, \{Gary J.\} and Carina Fian and Jonathan Gelbord and Goad, \{Michael R.\} and \{GonzAlez Buitrago\}, \{Diego H.\} and Grier, \{Catherine J.\} and Hall, \{Patrick B.\} and Chen Hu and Dragana Ilic and Shai Kaspi and Kochanek, \{Christopher S.\} and Kovacevic, \{Andjelka B.\} and Daniel Kynoch and Collin Lewin and John Montano and Hagai Netzer and Neustadt, \{Jack M.M.\} and Christos Panagiotou and Partington, \{Ethan R.\} and Rachel Plesha and \{C. Popovic\}, Luka and Daniel Proga and Thaisa Storchi-Bergmann and David Sanmartim and Siebert, \{Matthew R.\} and Matilde Signorini and Marianne Vestergaard and Tim Waters and Ying Zu",

note = "Publisher Copyright: {\textcopyright} 2024. The Author(s). Published by the American Astronomical Society.",

year = "2024",

month = oct,

day = "1",

doi = "10.3847/1538-4357/ad6771",

language = "English",

volume = "974",

number = "1",

}

Zaidouni, F, Kara, E, Kosec, P, Mehdipour, M, Rogantini, D, Kriss, GA, Behar, E, Kaastra, J, Barth, AJ, Cackett, EM, De Rosa, G, Homayouni, Y, Horne, K, Landt, H, Arav, N, Bentz, MC, Brotherton, MS, Dalla Bonta, E, Dehghanian, M, Ferland, GJ, Fian, C, Gelbord, J, Goad, MR, GonzAlez Buitrago, DH, Grier, CJ, Hall, PB, Hu, C, Ilic, D, Kaspi, S, Kochanek, CS, Kovacevic, AB, Kynoch, D, Lewin, C, Montano, J, Netzer, H, Neustadt, JMM, Panagiotou, C, Partington, ER, Plesha, R, C. Popovic, L, Proga, D, Storchi-Bergmann, T, Sanmartim, D, Siebert, MR, Signorini, M, Vestergaard, M, Waters, T & Zu, Y 2024, 'AGN STORM 2. IX. Studying the Dynamics of the Ionized Obscurer in Mrk 817 with High-resolution X-Ray Spectroscopy', Astrophysical Journal, vol. 974, n.º 1, 91. https://doi.org/10.3847/1538-4357/ad6771

TY - JOUR

T1 - AGN STORM 2. IX. Studying the Dynamics of the Ionized Obscurer in Mrk 817 with High-resolution X-Ray Spectroscopy

AU - Zaidouni, Fatima

AU - Kara, Erin

AU - Kosec, Peter

AU - Mehdipour, Missagh

AU - Rogantini, Daniele

AU - Kriss, Gerard A.

AU - Behar, Ehud

AU - Kaastra, Jelle

AU - Barth, Aaron J.

AU - Cackett, Edward M.

AU - De Rosa, Gisella

AU - Homayouni, Yasaman

AU - Horne, Keith

AU - Landt, Hermine

AU - Arav, Nahum

AU - Bentz, Misty C.

AU - Brotherton, Michael S.

AU - Dalla Bonta, Elena

AU - Dehghanian, Maryam

AU - Ferland, Gary J.

AU - Fian, Carina

AU - Gelbord, Jonathan

AU - Goad, Michael R.

AU - GonzAlez Buitrago, Diego H.

AU - Grier, Catherine J.

AU - Hall, Patrick B.

AU - Hu, Chen

AU - Ilic, Dragana

AU - Kaspi, Shai

AU - Kochanek, Christopher S.

AU - Kovacevic, Andjelka B.

AU - Kynoch, Daniel

AU - Lewin, Collin

AU - Montano, John

AU - Netzer, Hagai

AU - Neustadt, Jack M.M.

AU - Panagiotou, Christos

AU - Partington, Ethan R.

AU - Plesha, Rachel

AU - C. Popovic, Luka

AU - Proga, Daniel

AU - Storchi-Bergmann, Thaisa

AU - Sanmartim, David

AU - Siebert, Matthew R.

AU - Signorini, Matilde

AU - Vestergaard, Marianne

AU - Waters, Tim

AU - Zu, Ying

PY - 2024/10/1

Y1 - 2024/10/1

N2 - 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) Project. The campaign revealed an unexpected and transient obscuring outflow, never before seen in this source. Of our four XMM-Newton/NuSTAR epochs, one fortuitously taken during a bright X-ray state has strong narrow absorption lines in the high-resolution grating spectra. From these absorption features, we determine that the obscurer is in fact a multiphase ionized wind with an outflow velocity of ∼5200 km s−1, and for the first time find evidence for a lower ionization component with the same velocity observed in absorption features in the contemporaneous Hubble Space Telescope spectra. This indicates that the UV absorption troughs may be due to dense clumps embedded in diffuse, higher ionization gas responsible for the X-ray absorption lines of the same velocity. We observe variability in the shape of the absorption lines on timescales of hours, placing the variable component at roughly 1000 R g if attributed to transverse motion along the line of sight. This estimate aligns with independent UV measurements of the distance to the obscurer suggesting an accretion disk wind at the inner broad line region. We estimate that it takes roughly 200 days for the outflow to travel from the disk to our line of sight, consistent with the timescale of the outflow's column density variations throughout the campaign.

AB - 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) Project. The campaign revealed an unexpected and transient obscuring outflow, never before seen in this source. Of our four XMM-Newton/NuSTAR epochs, one fortuitously taken during a bright X-ray state has strong narrow absorption lines in the high-resolution grating spectra. From these absorption features, we determine that the obscurer is in fact a multiphase ionized wind with an outflow velocity of ∼5200 km s−1, and for the first time find evidence for a lower ionization component with the same velocity observed in absorption features in the contemporaneous Hubble Space Telescope spectra. This indicates that the UV absorption troughs may be due to dense clumps embedded in diffuse, higher ionization gas responsible for the X-ray absorption lines of the same velocity. We observe variability in the shape of the absorption lines on timescales of hours, placing the variable component at roughly 1000 R g if attributed to transverse motion along the line of sight. This estimate aligns with independent UV measurements of the distance to the obscurer suggesting an accretion disk wind at the inner broad line region. We estimate that it takes roughly 200 days for the outflow to travel from the disk to our line of sight, consistent with the timescale of the outflow's column density variations throughout the campaign.

UR - https://www.scopus.com/pages/publications/85207154367

UR - https://www.scopus.com/pages/publications/85207154367#tab=citedBy

U2 - 10.3847/1538-4357/ad6771

DO - 10.3847/1538-4357/ad6771

M3 - Article

AN - SCOPUS:85207154367

SN - 0004-637X

VL - 974

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

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ER -

AGN STORM 2. IX. Studying the Dynamics of the Ionized Obscurer in Mrk 817 with High-resolution X-Ray Spectroscopy

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