THE SLOAN DIGITAL SKY SURVEY REVERBERATION MAPPING PROJECT: RAPID C

C. J. Grier, P. B. Hall, William Nielsen Brandt, J. R. Trump, Yue Shen, M. Vivek, N. Filiz Ak, Yuguang Chen, K. S. Dawson, K. D. Denney, Paul J. Green, Linhua Jiang, C. S. Kochanek, Ian D. McGreer, I. Pris, B. M. Peterson, Donald P. Schneider, Charling Tao, W. M. Wood-Vasey, Dmitry BizyaevJian Ge, Karen Kinemuchi, Daniel Oravetz, Kaike Pan, Audrey Simmons

Research output: Contribution to journalReview article

33 Citations (Scopus)

Abstract

We report the discovery of rapid variations of a high-velocity C iv broad absorption line trough in the quasar SDSS J141007.74+541203.3. This object was intensively observed in 2014 as a part of the Sloan Digital Sky Survey Reverberation Mapping Project, during which 32 epochs of spectroscopy were obtained with the Baryon Oscillation Spectroscopic Survey spectrograph. We observe significant (>4σ) variability in the equivalent width (EW) of the broad (∼4000 km s -1 wide) C iv trough on rest-frame timescales as short as 1.20 days (∼29 hr), the shortest broad absorption line variability timescale yet reported. The EW varied by ∼10% on these short timescales, and by about a factor of two over the duration of the campaign. We evaluate several potential causes of the variability, concluding that the most likely cause is a rapid response to changes in the incident ionizing continuum. If the outflow is at a radius where the recombination rate is higher than the ionization rate, the timescale of variability places a lower limit on the density of the absorbing gas of n e 3.9 ×10 5 cm -3 . The broad absorption line variability characteristics of this quasar are consistent with those observed in previous studies of quasars, indicating that such short-term variability may in fact be common and thus can be used to learn about outflow characteristics and contributions to quasar/host-galaxy feedback scenarios.

Original languageEnglish (US)
Article number111
JournalAstrophysical Journal
Volume806
Issue number1
DOIs
StatePublished - Jun 10 2015

Fingerprint

reverberation
timescale
quasars
trough
outflow
troughs
recombination
ionization
causes
oscillation
spectroscopy
spectrographs
project
baryons
time measurement
gas
galaxies
continuums
oscillations
radii

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Grier, C. J., Hall, P. B., Brandt, W. N., Trump, J. R., Shen, Y., Vivek, M., ... Simmons, A. (2015). THE SLOAN DIGITAL SKY SURVEY REVERBERATION MAPPING PROJECT: RAPID C. Astrophysical Journal, 806(1), [111]. https://doi.org/10.1088/0004-637X/806/1/111
Grier, C. J. ; Hall, P. B. ; Brandt, William Nielsen ; Trump, J. R. ; Shen, Yue ; Vivek, M. ; Ak, N. Filiz ; Chen, Yuguang ; Dawson, K. S. ; Denney, K. D. ; Green, Paul J. ; Jiang, Linhua ; Kochanek, C. S. ; McGreer, Ian D. ; Pris, I. ; Peterson, B. M. ; Schneider, Donald P. ; Tao, Charling ; Wood-Vasey, W. M. ; Bizyaev, Dmitry ; Ge, Jian ; Kinemuchi, Karen ; Oravetz, Daniel ; Pan, Kaike ; Simmons, Audrey. / THE SLOAN DIGITAL SKY SURVEY REVERBERATION MAPPING PROJECT : RAPID C. In: Astrophysical Journal. 2015 ; Vol. 806, No. 1.
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abstract = "We report the discovery of rapid variations of a high-velocity C iv broad absorption line trough in the quasar SDSS J141007.74+541203.3. This object was intensively observed in 2014 as a part of the Sloan Digital Sky Survey Reverberation Mapping Project, during which 32 epochs of spectroscopy were obtained with the Baryon Oscillation Spectroscopic Survey spectrograph. We observe significant (>4σ) variability in the equivalent width (EW) of the broad (∼4000 km s -1 wide) C iv trough on rest-frame timescales as short as 1.20 days (∼29 hr), the shortest broad absorption line variability timescale yet reported. The EW varied by ∼10{\%} on these short timescales, and by about a factor of two over the duration of the campaign. We evaluate several potential causes of the variability, concluding that the most likely cause is a rapid response to changes in the incident ionizing continuum. If the outflow is at a radius where the recombination rate is higher than the ionization rate, the timescale of variability places a lower limit on the density of the absorbing gas of n e 3.9 ×10 5 cm -3 . The broad absorption line variability characteristics of this quasar are consistent with those observed in previous studies of quasars, indicating that such short-term variability may in fact be common and thus can be used to learn about outflow characteristics and contributions to quasar/host-galaxy feedback scenarios.",
author = "Grier, {C. J.} and Hall, {P. B.} and Brandt, {William Nielsen} and Trump, {J. R.} and Yue Shen and M. Vivek and Ak, {N. Filiz} and Yuguang Chen and Dawson, {K. S.} and Denney, {K. D.} and Green, {Paul J.} and Linhua Jiang and Kochanek, {C. S.} and McGreer, {Ian D.} and I. Pris and Peterson, {B. M.} and Schneider, {Donald P.} and Charling Tao and Wood-Vasey, {W. M.} and Dmitry Bizyaev and Jian Ge and Karen Kinemuchi and Daniel Oravetz and Kaike Pan and Audrey Simmons",
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Grier, CJ, Hall, PB, Brandt, WN, Trump, JR, Shen, Y, Vivek, M, Ak, NF, Chen, Y, Dawson, KS, Denney, KD, Green, PJ, Jiang, L, Kochanek, CS, McGreer, ID, Pris, I, Peterson, BM, Schneider, DP, Tao, C, Wood-Vasey, WM, Bizyaev, D, Ge, J, Kinemuchi, K, Oravetz, D, Pan, K & Simmons, A 2015, 'THE SLOAN DIGITAL SKY SURVEY REVERBERATION MAPPING PROJECT: RAPID C', Astrophysical Journal, vol. 806, no. 1, 111. https://doi.org/10.1088/0004-637X/806/1/111

THE SLOAN DIGITAL SKY SURVEY REVERBERATION MAPPING PROJECT : RAPID C. / Grier, C. J.; Hall, P. B.; Brandt, William Nielsen; Trump, J. R.; Shen, Yue; Vivek, M.; Ak, N. Filiz; Chen, Yuguang; Dawson, K. S.; Denney, K. D.; Green, Paul J.; Jiang, Linhua; Kochanek, C. S.; McGreer, Ian D.; Pris, I.; Peterson, B. M.; Schneider, Donald P.; Tao, Charling; Wood-Vasey, W. M.; Bizyaev, Dmitry; Ge, Jian; Kinemuchi, Karen; Oravetz, Daniel; Pan, Kaike; Simmons, Audrey.

In: Astrophysical Journal, Vol. 806, No. 1, 111, 10.06.2015.

Research output: Contribution to journalReview article

TY - JOUR

T1 - THE SLOAN DIGITAL SKY SURVEY REVERBERATION MAPPING PROJECT

T2 - RAPID C

AU - Grier, C. J.

AU - Hall, P. B.

AU - Brandt, William Nielsen

AU - Trump, J. R.

AU - Shen, Yue

AU - Vivek, M.

AU - Ak, N. Filiz

AU - Chen, Yuguang

AU - Dawson, K. S.

AU - Denney, K. D.

AU - Green, Paul J.

AU - Jiang, Linhua

AU - Kochanek, C. S.

AU - McGreer, Ian D.

AU - Pris, I.

AU - Peterson, B. M.

AU - Schneider, Donald P.

AU - Tao, Charling

AU - Wood-Vasey, W. M.

AU - Bizyaev, Dmitry

AU - Ge, Jian

AU - Kinemuchi, Karen

AU - Oravetz, Daniel

AU - Pan, Kaike

AU - Simmons, Audrey

PY - 2015/6/10

Y1 - 2015/6/10

N2 - We report the discovery of rapid variations of a high-velocity C iv broad absorption line trough in the quasar SDSS J141007.74+541203.3. This object was intensively observed in 2014 as a part of the Sloan Digital Sky Survey Reverberation Mapping Project, during which 32 epochs of spectroscopy were obtained with the Baryon Oscillation Spectroscopic Survey spectrograph. We observe significant (>4σ) variability in the equivalent width (EW) of the broad (∼4000 km s -1 wide) C iv trough on rest-frame timescales as short as 1.20 days (∼29 hr), the shortest broad absorption line variability timescale yet reported. The EW varied by ∼10% on these short timescales, and by about a factor of two over the duration of the campaign. We evaluate several potential causes of the variability, concluding that the most likely cause is a rapid response to changes in the incident ionizing continuum. If the outflow is at a radius where the recombination rate is higher than the ionization rate, the timescale of variability places a lower limit on the density of the absorbing gas of n e 3.9 ×10 5 cm -3 . The broad absorption line variability characteristics of this quasar are consistent with those observed in previous studies of quasars, indicating that such short-term variability may in fact be common and thus can be used to learn about outflow characteristics and contributions to quasar/host-galaxy feedback scenarios.

AB - We report the discovery of rapid variations of a high-velocity C iv broad absorption line trough in the quasar SDSS J141007.74+541203.3. This object was intensively observed in 2014 as a part of the Sloan Digital Sky Survey Reverberation Mapping Project, during which 32 epochs of spectroscopy were obtained with the Baryon Oscillation Spectroscopic Survey spectrograph. We observe significant (>4σ) variability in the equivalent width (EW) of the broad (∼4000 km s -1 wide) C iv trough on rest-frame timescales as short as 1.20 days (∼29 hr), the shortest broad absorption line variability timescale yet reported. The EW varied by ∼10% on these short timescales, and by about a factor of two over the duration of the campaign. We evaluate several potential causes of the variability, concluding that the most likely cause is a rapid response to changes in the incident ionizing continuum. If the outflow is at a radius where the recombination rate is higher than the ionization rate, the timescale of variability places a lower limit on the density of the absorbing gas of n e 3.9 ×10 5 cm -3 . The broad absorption line variability characteristics of this quasar are consistent with those observed in previous studies of quasars, indicating that such short-term variability may in fact be common and thus can be used to learn about outflow characteristics and contributions to quasar/host-galaxy feedback scenarios.

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U2 - 10.1088/0004-637X/806/1/111

DO - 10.1088/0004-637X/806/1/111

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