A Reverberation Lag for the High-ionization Component of the Broad-line Region in the Narrow-line Seyfert 1 Mrk 335

C.J. Grier; B.M. Petersen; R.W. Pogge; Kelly Dianne Denney; M.C. Bentz; P. Martini; S.G. Sergeev; S. Kaspi; Y. Zu; C.S. Kochanek

doi:10.1088/2041-8205/744/1/L4

A Reverberation Lag for the High-ionization Component of the Broad-line Region in the Narrow-line Seyfert 1 Mrk 335

C.J. Grier, B.M. Petersen, R.W. Pogge, Kelly Dianne Denney, M.C. Bentz, P. Martini, S.G. Sergeev, S. Kaspi, Y. Zu, C.S. Kochanek

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Abstract

We present the first results from a detailed analysis of photometric and spectrophotometric data on the narrow-line Seyfert 1 (NLS1) galaxy Mrk 335, collected over a 120 day span in the fall of 2010. From these data we measure the lag in the He IIλ4686 broad emission line relative to the optical continuum to be 2.7 ± 0.6days and the lag in the Hβλ4861 broad emission line to be 13.9 ± 0.9days. Combined with the line width, the He II lag yields a black hole mass M _BH = (2.6 ± 0.8) × 10⁷ M _⊙. This measurement is consistent with measurements made using the Hβλ4861 line, suggesting that the He II emission originates in the same structure as Hβ, but at a much smaller radius. This constitutes the first robust lag measurement for a high-ionization line in an NLS1 galaxy and supports a scenario in which the He II emission originates from gas in virial motion rather than outflow.

Original language	English
Journal	Astrophysics Journal Letters
Volume	744
Issue number	1
Pages (from-to)	L4
ISSN	2041-8205
DOIs	https://doi.org/10.1088/2041-8205/744/1/L4
Publication status	Published - 1 Jan 2012

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title = "A Reverberation Lag for the High-ionization Component of the Broad-line Region in the Narrow-line Seyfert 1 Mrk 335",

abstract = "We present the first results from a detailed analysis of photometric and spectrophotometric data on the narrow-line Seyfert 1 (NLS1) galaxy Mrk 335, collected over a 120 day span in the fall of 2010. From these data we measure the lag in the He IIλ4686 broad emission line relative to the optical continuum to be 2.7 ± 0.6days and the lag in the Hβλ4861 broad emission line to be 13.9 ± 0.9days. Combined with the line width, the He II lag yields a black hole mass M BH = (2.6 ± 0.8) × 107 M ⊙. This measurement is consistent with measurements made using the Hβλ4861 line, suggesting that the He II emission originates in the same structure as Hβ, but at a much smaller radius. This constitutes the first robust lag measurement for a high-ionization line in an NLS1 galaxy and supports a scenario in which the He II emission originates from gas in virial motion rather than outflow.",

author = "C.J. Grier and B.M. Petersen and R.W. Pogge and Denney, {Kelly Dianne} and M.C. Bentz and P. Martini and S.G. Sergeev and S. Kaspi and Y. Zu and C.S. Kochanek",

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T1 - A Reverberation Lag for the High-ionization Component of the Broad-line Region in the Narrow-line Seyfert 1 Mrk 335

AU - Grier, C.J.

AU - Petersen, B.M.

AU - Pogge, R.W.

AU - Denney, Kelly Dianne

AU - Bentz, M.C.

AU - Martini, P.

AU - Sergeev, S.G.

AU - Kaspi, S.

AU - Zu, Y.

AU - Kochanek, C.S.

PY - 2012/1/1

Y1 - 2012/1/1

N2 - We present the first results from a detailed analysis of photometric and spectrophotometric data on the narrow-line Seyfert 1 (NLS1) galaxy Mrk 335, collected over a 120 day span in the fall of 2010. From these data we measure the lag in the He IIλ4686 broad emission line relative to the optical continuum to be 2.7 ± 0.6days and the lag in the Hβλ4861 broad emission line to be 13.9 ± 0.9days. Combined with the line width, the He II lag yields a black hole mass M BH = (2.6 ± 0.8) × 107 M ⊙. This measurement is consistent with measurements made using the Hβλ4861 line, suggesting that the He II emission originates in the same structure as Hβ, but at a much smaller radius. This constitutes the first robust lag measurement for a high-ionization line in an NLS1 galaxy and supports a scenario in which the He II emission originates from gas in virial motion rather than outflow.

AB - We present the first results from a detailed analysis of photometric and spectrophotometric data on the narrow-line Seyfert 1 (NLS1) galaxy Mrk 335, collected over a 120 day span in the fall of 2010. From these data we measure the lag in the He IIλ4686 broad emission line relative to the optical continuum to be 2.7 ± 0.6days and the lag in the Hβλ4861 broad emission line to be 13.9 ± 0.9days. Combined with the line width, the He II lag yields a black hole mass M BH = (2.6 ± 0.8) × 107 M ⊙. This measurement is consistent with measurements made using the Hβλ4861 line, suggesting that the He II emission originates in the same structure as Hβ, but at a much smaller radius. This constitutes the first robust lag measurement for a high-ionization line in an NLS1 galaxy and supports a scenario in which the He II emission originates from gas in virial motion rather than outflow.

U2 - 10.1088/2041-8205/744/1/L4

DO - 10.1088/2041-8205/744/1/L4

M3 - Journal article

SN - 2041-8205

VL - 744

SP - L4

JO - The Astrophysical Journal Letters

JF - The Astrophysical Journal Letters

IS - 1

ER -

A Reverberation Lag for the High-ionization Component of the Broad-line Region in the Narrow-line Seyfert 1 Mrk 335

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