The Lick AGN Monitoring Project 2011 observing campaign was carried out over the course of 11 weeks in spring 2011. Here we present the first results from this program, a measurement of the broad-line reverberation lag in the Seyfert 1 galaxy Mrk50. Combining our data with supplemental observations obtained prior to the start of the main observing campaign, our data set covers a total duration of 4.5 months. During this time, Mrk50 was highly variable, exhibiting a maximum variability amplitude of a factor of 4 in the U-band continuum and a factor of ∼2 in the Hβ line. Using standard cross-correlation techniques, we find that Hβ and Hγ lag the V-band continuum by τcen = 10.64+0.82- 0.93 and 8.43+1.30- 1.28days, respectively, while the lag of He II λ4686 is unresolved. The Hβ line exhibits a symmetric velocity-resolved reverberation signature with shorter lags in the high-velocity wings than in the line core, consistent with an origin in a broad-line region (BLR) dominated by orbital motion rather than infall or outflow. Assuming a virial normalization factor of f = 5.25, the virial estimate of the black hole mass is (3.2 ± 0.5) × 107 M ⊙. These observations demonstrate that Mrk50 is among the most promising nearby active galaxies for detailed investigations of BLR structure and dynamics. © 2011. The American Astronomical Society. All rights reserved.
Barth, A., Pancoast, A., Thorman, S., Bennert, V., Sand, D., Li, W., et al. (2011). The lick AGN monitoring project 2011: Reverberation mapping of Markarian 50. THE ASTROPHYSICAL JOURNAL LETTERS, 743(1), L4 [10.1088/2041-8205/743/1/L4].
|Citazione:||Barth, A., Pancoast, A., Thorman, S., Bennert, V., Sand, D., Li, W., et al. (2011). The lick AGN monitoring project 2011: Reverberation mapping of Markarian 50. THE ASTROPHYSICAL JOURNAL LETTERS, 743(1), L4 [10.1088/2041-8205/743/1/L4].|
|Tipo:||Articolo in rivista - Articolo scientifico|
|Carattere della pubblicazione:||Scientifica|
|Presenza di un coautore afferente ad Istituzioni straniere:||Si|
|Titolo:||The lick AGN monitoring project 2011: Reverberation mapping of Markarian 50|
|Autori:||Barth, A; Pancoast, A; Thorman, S; Bennert, V; Sand, D; Li, W; Canalizo, G; Filippenko, A; Gates, E; Greene, J; Malkan, M; Stern, D; Treu, T; Woo, J; Assef, R; Bae, H; Brewer, B; Buehler, T; Cenko, S; Clubb, K; Cooper, M; Diamond-Stanic, A; Hiner, K; Honig, S; Joner, M; Kandrashoff, M; Laney, C; Lazarova, M; Nierenberg, A; Park, D; Silverman, J; Son, D; Sonnenfeld, A; Tollerud, E; Walsh, J; Walters, R; Da Silva, R; Fumagalli, M; Gregg, M; Harris, C; Hsiao, E; Lee, J; Lopez, L; Rex, J; Suzuki, N; Trump, J; Tytler, D; Worseck, G; Yesuf, H|
|Data di pubblicazione:||2011|
|Rivista:||THE ASTROPHYSICAL JOURNAL LETTERS|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1088/2041-8205/743/1/L4|
|Appare nelle tipologie:||01 - Articolo su rivista|