A REVERBERATION LAG FOR THE HIGH-IONIZATION COMPONENT OF THE BROAD-LINE REGION IN THE NARROW-LINE SEYFERT 1 Mrk 335

Journal Article · Sun Jan 15 04:00:00 EST 2012 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/744/1/L4· OSTI ID:22047257

Grier, C J; Peterson, B M; Pogge, R W; Martini, Paul; Zu, Y; Kochanek, C S; Shappee, B J; Stanek, K Z; Araya Salvo, C; Beatty, T G; Bird, J C ^[1]; Denney, K D ^[2]; Bentz, M C ^[3]; Sergeev, S G; Borman, G A ^[4]; Kaspi, S ^[5]; Bord, D J ^[6]; Che, X ^[7]; Chen, C; Cohen, S A ^[8] ; others, and

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1. Department of Astronomy, The Ohio State University, 140 W 18th Avenue, Columbus, OH 43210 (United States)
2. Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen (Denmark)
3. Department of Physics and Astronomy, Georgia State University, Astronomy Offices, One Park Place South SE, Suite 700, Atlanta, GA 30303 (United States)
4. Crimean Astrophysical Observatory, P/O Nauchny Crimea 98409 (Ukraine)
5. School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978 (Israel)
6. Department of Natural Sciences, The University of Michigan-Dearborn, 4901 Evergreen Rd, Dearborn, MI 48128 (United States)
7. Department of Astronomy, University of Michigan, 500 Church Street, Ann Arbor, MI 41809 (United States)
8. Department of Physics and Astronomy, Dartmouth College, 6127 Wilder Laboratory, Hanover, NH 03755 (United States)

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 II {lambda}4686 broad emission line relative to the optical continuum to be 2.7 {+-} 0.6 days and the lag in the H{beta}{lambda}4861 broad emission line to be 13.9 {+-} 0.9 days. Combined with the line width, the He II lag yields a black hole mass M{sub BH} = (2.6 {+-} 0.8) Multiplication-Sign 10{sup 7} M{sub Sun }. This measurement is consistent with measurements made using the H{beta}{lambda}4861 line, suggesting that the He II emission originates in the same structure as H{beta}, 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.

• OSTI ID: 22047257
• Journal Information: Astrophysical Journal Letters, Journal Name: Astrophysical Journal Letters Journal Issue: 1 Vol. 744; ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ASTROPHYSICS
BLACK HOLES
EMISSION SPECTRA
GALAXY NUCLEI
HELIUM IONS
IONIZATION
LINE WIDTHS
MASS
SEYFERT GALAXIES
SPECTROPHOTOMETRY