Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. XIV. Intensive optical spectrophotometric observations of NGC 7469

S. J. Collier; Keith Horne; S. Kaspi; H. Netzer; B. M. Peterson; I. Wanders; T. Alexander; R. Bertram; A. Comastri; C. M. Gaskell; Yu F. Malkov; D. Maoz; M. Mlgnoli; R. W. Pogge; V. I. Pronik; S. G. Sergeev; S. Snedden; G. M. Stirpe; N. G. Bochkarev; A. N. Burenkov; A. I. Shapovalova; R. M. Wagner

doi:10.1086/305720

Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. XIV. Intensive optical spectrophotometric observations of NGC 7469

S. J. Collier^*, Keith Horne, S. Kaspi, H. Netzer, B. M. Peterson, I. Wanders, T. Alexander, R. Bertram, A. Comastri, C. M. Gaskell, Yu F. Malkov, D. Maoz, M. Mlgnoli, R. W. Pogge, V. I. Pronik, S. G. Sergeev, S. Snedden, G. M. Stirpe, N. G. Bochkarev, A. N. BurenkovA. I. Shapovalova, R. M. Wagner

^*Corresponding author for this work

School of Physics and Astronomy

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Abstract

We present results of an intensive 2 month campaign of ground-based spectrophotometric monitoring of the Seyfert 1 galaxy NGC 7469, with a temporal resolution ≲ 1 day. The broad Hα and Hβ emission lines respond to ∼35% ultraviolet continuum variations with an amplitude of ∼10% and time delays of 5.6 ± 1.3 days and 5.4 ± 0.8 days, respectively. We interpret this as evidence of variable Balmer line gas ∼5-6 light days from the central source in this object, widely believed to be a supermassive black hole. The virial mass of the central source implied by line widths and time delays is ∼10⁶-10⁷ M_⊙. Concomitantly, we find evidence for wavelength-dependent continuum time delays: optical continuum variations lag those at 1315 Å by 1.0 ± 0.3 days at 4865 Å to 1.5 ± 0.7 days at 6962 Å. This suggests a stratified continuum reprocessing region extending several light days from the central source, possibly an accretion disk.

Original language	English
Pages (from-to)	162-172
Number of pages	11
Journal	Astrophysical Journal
Volume	500
Issue number	1 PART I
DOIs	https://doi.org/10.1086/305720
State	Published - 1998

Keywords

Galaxies: Active
Galaxies: Individual (NGC 7469)
Galaxies: Nuclei
Galaxies: Seyfert

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Collier, S. J., Horne, K., Kaspi, S., Netzer, H., Peterson, B. M., Wanders, I., Alexander, T., Bertram, R., Comastri, A., Gaskell, C. M., Malkov, Y. F., Maoz, D., Mlgnoli, M., Pogge, R. W., Pronik, V. I., Sergeev, S. G., Snedden, S., Stirpe, G. M., Bochkarev, N. G., ... Wagner, R. M. (1998). Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. XIV. Intensive optical spectrophotometric observations of NGC 7469. Astrophysical Journal, 500(1 PART I), 162-172. https://doi.org/10.1086/305720

@article{19126744b679482088fd7d930f1d5ebe,

title = "Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. XIV. Intensive optical spectrophotometric observations of NGC 7469",

abstract = "We present results of an intensive 2 month campaign of ground-based spectrophotometric monitoring of the Seyfert 1 galaxy NGC 7469, with a temporal resolution ≲ 1 day. The broad Hα and Hβ emission lines respond to ∼35% ultraviolet continuum variations with an amplitude of ∼10% and time delays of 5.6 ± 1.3 days and 5.4 ± 0.8 days, respectively. We interpret this as evidence of variable Balmer line gas ∼5-6 light days from the central source in this object, widely believed to be a supermassive black hole. The virial mass of the central source implied by line widths and time delays is ∼106-107 M⊙. Concomitantly, we find evidence for wavelength-dependent continuum time delays: optical continuum variations lag those at 1315 {\AA} by 1.0 ± 0.3 days at 4865 {\AA} to 1.5 ± 0.7 days at 6962 {\AA}. This suggests a stratified continuum reprocessing region extending several light days from the central source, possibly an accretion disk.",

keywords = "Galaxies: Active, Galaxies: Individual (NGC 7469), Galaxies: Nuclei, Galaxies: Seyfert",

author = "Collier, {S. J.} and Keith Horne and S. Kaspi and H. Netzer and Peterson, {B. M.} and I. Wanders and T. Alexander and R. Bertram and A. Comastri and Gaskell, {C. M.} and Malkov, {Yu F.} and D. Maoz and M. Mlgnoli and Pogge, {R. W.} and Pronik, {V. I.} and Sergeev, {S. G.} and S. Snedden and Stirpe, {G. M.} and Bochkarev, {N. G.} and Burenkov, {A. N.} and Shapovalova, {A. I.} and Wagner, {R. M.}",

year = "1998",

doi = "10.1086/305720",

language = "אנגלית",

volume = "500",

pages = "162--172",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1 PART I",

}

Collier, SJ, Horne, K, Kaspi, S, Netzer, H, Peterson, BM, Wanders, I, Alexander, T, Bertram, R, Comastri, A, Gaskell, CM, Malkov, YF, Maoz, D, Mlgnoli, M, Pogge, RW, Pronik, VI, Sergeev, SG, Snedden, S, Stirpe, GM, Bochkarev, NG, Burenkov, AN, Shapovalova, AI & Wagner, RM 1998, 'Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. XIV. Intensive optical spectrophotometric observations of NGC 7469', Astrophysical Journal, vol. 500, no. 1 PART I, pp. 162-172. https://doi.org/10.1086/305720

TY - JOUR

T1 - Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. XIV. Intensive optical spectrophotometric observations of NGC 7469

AU - Collier, S. J.

AU - Horne, Keith

AU - Kaspi, S.

AU - Netzer, H.

AU - Peterson, B. M.

AU - Wanders, I.

AU - Alexander, T.

AU - Bertram, R.

AU - Comastri, A.

AU - Gaskell, C. M.

AU - Malkov, Yu F.

AU - Maoz, D.

AU - Mlgnoli, M.

AU - Pogge, R. W.

AU - Pronik, V. I.

AU - Sergeev, S. G.

AU - Snedden, S.

AU - Stirpe, G. M.

AU - Bochkarev, N. G.

AU - Burenkov, A. N.

AU - Shapovalova, A. I.

AU - Wagner, R. M.

PY - 1998

Y1 - 1998

N2 - We present results of an intensive 2 month campaign of ground-based spectrophotometric monitoring of the Seyfert 1 galaxy NGC 7469, with a temporal resolution ≲ 1 day. The broad Hα and Hβ emission lines respond to ∼35% ultraviolet continuum variations with an amplitude of ∼10% and time delays of 5.6 ± 1.3 days and 5.4 ± 0.8 days, respectively. We interpret this as evidence of variable Balmer line gas ∼5-6 light days from the central source in this object, widely believed to be a supermassive black hole. The virial mass of the central source implied by line widths and time delays is ∼106-107 M⊙. Concomitantly, we find evidence for wavelength-dependent continuum time delays: optical continuum variations lag those at 1315 Å by 1.0 ± 0.3 days at 4865 Å to 1.5 ± 0.7 days at 6962 Å. This suggests a stratified continuum reprocessing region extending several light days from the central source, possibly an accretion disk.

AB - We present results of an intensive 2 month campaign of ground-based spectrophotometric monitoring of the Seyfert 1 galaxy NGC 7469, with a temporal resolution ≲ 1 day. The broad Hα and Hβ emission lines respond to ∼35% ultraviolet continuum variations with an amplitude of ∼10% and time delays of 5.6 ± 1.3 days and 5.4 ± 0.8 days, respectively. We interpret this as evidence of variable Balmer line gas ∼5-6 light days from the central source in this object, widely believed to be a supermassive black hole. The virial mass of the central source implied by line widths and time delays is ∼106-107 M⊙. Concomitantly, we find evidence for wavelength-dependent continuum time delays: optical continuum variations lag those at 1315 Å by 1.0 ± 0.3 days at 4865 Å to 1.5 ± 0.7 days at 6962 Å. This suggests a stratified continuum reprocessing region extending several light days from the central source, possibly an accretion disk.

KW - Galaxies: Active

KW - Galaxies: Individual (NGC 7469)

KW - Galaxies: Nuclei

KW - Galaxies: Seyfert

UR - http://www.scopus.com/inward/record.url?scp=22044451003&partnerID=8YFLogxK

U2 - 10.1086/305720

DO - 10.1086/305720

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:22044451003

SN - 0004-637X

VL - 500

SP - 162

EP - 172

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 PART I

ER -

Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. XIV. Intensive optical spectrophotometric observations of NGC 7469

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