Other
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21531202d&link_type=abstract
American Astronomical Society, AAS Meeting #215, #312.02; Bulletin of the American Astronomical Society, Vol. 42, p.312
Other
Scientific paper
We present results from a multi-month reverberation mapping campaign undertaken primarily at MDM Observatory with supporting observations from telescopes around the world. Reverberation mapping takes advantage of the presence of a time delay or lag, κ, between continuum and emission line flux variations observed through spectroscopic monitoring campaigns to infer the radius of the broad line region (BLR) and, subsequently, the central black hole mass in type 1 AGNs. The primary goal of this campaign was to obtain either new or improved Hβ reverberation lag measurements for several relatively low luminosity AGNs. We succeeded in measuring a reverberation lag for the first time in Mrk 290, and significantly improved upon previous lags measured for NGC 3227, NGC 3516, and NGC 4051. We present these BLR radii and others from the campaign in context to the most recent calibration of the broad-line radius-luminosity relationship. In addition to mean BLR lags, we also present results from a velocity-resolved reverberation analysis, in which we divided the Hβ line profile into velocity bins and independently measured the Hβ lag in each velocity bin to search for differences in the reverberation lag across the BLR. Our results demonstrate that diverse kinematic signatures appear within the BLRs of even the small sample of objects within our sample, as we see indications for inflow, outflow, and virialized, Keplarian motions. This work was funded in part by the National Science Foundation though grant AST-0604066 to The Ohio State University.
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