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The Lick AGN Monitoring Project 2011: Reverberation Mapping of Markarian 50 | | A. J. Barth
; A. Pancoast
; S. J. Thorman
; V. N. Bennert
; D. J. Sand
; W. Li
; G. Canalizo
; A. V. Filippenko
; E. L. Gates
; J. E. Greene
; M. A. Malkan
; D. Stern
; T. Treu
; J.-H. Woo
; R. J. Assef
; H.-J. Bae
; B. J. Brewer
; T. Buehler
; S. B. Cenko
; K. I. Clubb
; M. C. Cooper
; A. M. Diamond-Stanic
; K. D. Hiner
; S. F. Hoenig
; M. D. Joner
; M. T. Kandrashoff
; C. D. Laney
; M. S. Lazarova
; A. M. Nierenberg
; D. Park
; J. M. Silverman
; D. Son
; A. Sonnenfeld
; E. J. Tollerud
; J. L. Walsh
; R. Walters
; R. L. da Silva
; M. Fumagalli
; M. D. Gregg
; C. E. Harris
; E. Y. Hsiao
; J. Lee
; L. Lopez
; J. Rex
; N. Suzuki
; J. R. Trump
; D. Tytler
; G. Worseck
; H. M. Yesuf
; | | Date: |
31 Oct 2011 | | Abstract: | 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 Mrk 50. Combining our data with supplemental observations obtained
prior to the start of the main observing campaign, our dataset covers a total
duration of 4.5 months. During this time, Mrk 50 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 H-beta line. Using standard
cross-correlation techniques, we find that H-beta and H-gamma lag the V-band
continuum by tau_cen = 10.64(-0.93,+0.82) and 8.43(-1.28,+1.30) days,
respectively, while the lag of He II 4686 is unresolved. The H-beta 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 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)*10^7 solar masses. These observations
demonstrate that Mrk 50 is among the most promising nearby active galaxies for
detailed investigations of broad-line region structure and dynamics. | | Source: | arXiv, 1111.0061 | | Services: | Forum | Review | PDF | Favorites | |
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