The SDSS-V Black Hole Mapper Reverberation Mapping Project: CIV BAL Acceleration in the Quasar SBS 1408+544
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| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
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2024
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| author | Wheatley, Robert Grier, Catherine J. Hall, Patrick B. Brandt, W. N. Lotz, Jonah Schneider, D. P. Trump, Jonathan R. Shen, Yue Seaton, Lucas M. Anderson, Scott F. Temple, Matthew J. Assef, Roberto Fries, Logan B. Homayouni, Y. Kakkad, Darshan Koekemoer, Anton M. Martınez-Aldama, Mary Loli Negrete, C. Alenka Ricci, Claudio Bizyaev, Dmitry Brownstein, Joel R. Morrison, Sean Pan, Kaike |
| author_facet | Wheatley, Robert Grier, Catherine J. Hall, Patrick B. Brandt, W. N. Lotz, Jonah Schneider, D. P. Trump, Jonathan R. Shen, Yue Seaton, Lucas M. Anderson, Scott F. Temple, Matthew J. Assef, Roberto Fries, Logan B. Homayouni, Y. Kakkad, Darshan Koekemoer, Anton M. Martınez-Aldama, Mary Loli Negrete, C. Alenka Ricci, Claudio Bizyaev, Dmitry Brownstein, Joel R. Morrison, Sean Pan, Kaike |
| contents | We present the results of an investigation of a highly variable CIV broad absorption-line feature in the quasar SBS 1408+544 (z=2.337) that shows a significant shift in velocity over time. This source was observed as a part of the Sloan Digital Sky Survey Reverberation Mapping Project and the SDSS-V Black Hole Mapper Reverberation Mapping Project, and has been included in two previous studies, both of which identified significant variability in a high-velocity CIV broad absorption line (BAL) on timescales of just a few days in the quasar rest frame. Using ~130 spectra acquired over eight years of spectroscopic monitoring with SDSS, we have determined that this BAL is not only varying in strength, but is also systematically shifting to higher velocities. Using cross-correlation methods, we measure the velocity shifts (and corresponding acceleration) of the BAL on a wide range of timescales, measuring an overall velocity shift of delta v = -683 (+89, -84) km s-1 over the 8-year monitoring period. This corresponds to an average rest-frame acceleration of a=1.04 (+0.14, -0.13) cm s-2, though the magnitude of the acceleration on shorter timescales is not constant throughout. We place our measurements in the context of BAL-acceleration models and examine various possible causes of the observed velocity shift. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_08622 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The SDSS-V Black Hole Mapper Reverberation Mapping Project: CIV BAL Acceleration in the Quasar SBS 1408+544 Wheatley, Robert Grier, Catherine J. Hall, Patrick B. Brandt, W. N. Lotz, Jonah Schneider, D. P. Trump, Jonathan R. Shen, Yue Seaton, Lucas M. Anderson, Scott F. Temple, Matthew J. Assef, Roberto Fries, Logan B. Homayouni, Y. Kakkad, Darshan Koekemoer, Anton M. Martınez-Aldama, Mary Loli Negrete, C. Alenka Ricci, Claudio Bizyaev, Dmitry Brownstein, Joel R. Morrison, Sean Pan, Kaike Astrophysics of Galaxies We present the results of an investigation of a highly variable CIV broad absorption-line feature in the quasar SBS 1408+544 (z=2.337) that shows a significant shift in velocity over time. This source was observed as a part of the Sloan Digital Sky Survey Reverberation Mapping Project and the SDSS-V Black Hole Mapper Reverberation Mapping Project, and has been included in two previous studies, both of which identified significant variability in a high-velocity CIV broad absorption line (BAL) on timescales of just a few days in the quasar rest frame. Using ~130 spectra acquired over eight years of spectroscopic monitoring with SDSS, we have determined that this BAL is not only varying in strength, but is also systematically shifting to higher velocities. Using cross-correlation methods, we measure the velocity shifts (and corresponding acceleration) of the BAL on a wide range of timescales, measuring an overall velocity shift of delta v = -683 (+89, -84) km s-1 over the 8-year monitoring period. This corresponds to an average rest-frame acceleration of a=1.04 (+0.14, -0.13) cm s-2, though the magnitude of the acceleration on shorter timescales is not constant throughout. We place our measurements in the context of BAL-acceleration models and examine various possible causes of the observed velocity shift. |
| title | The SDSS-V Black Hole Mapper Reverberation Mapping Project: CIV BAL Acceleration in the Quasar SBS 1408+544 |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2406.08622 |