| タイトル | Reverberation Mapping of the Kepler-Field AGN KA1858+4850 |
| 本文（外部サイト） | http://hdl.handle.net/2060/20150008979 |
| 著者（英） | Aldering, Greg S.; Carroll, Carla J.; Carson, Daniel J.; Cohen, Daniel P.; Cucchiara, Antonino; Pei, Liuyi; Cenko, S., Bradley; Desjardins, Tyler D.; Briley, Michael M.; Barth, Aaron J.; Clubb, Kelsey I. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2014-10-10 |
| 言語 | eng |
| 内容記述 | KA1858+4850 is a narrow-line Seyfert 1 galaxy at redshift 0.078 and is among the brightest active galaxies monitored by the Kepler mission. We have carried out a reverberation mapping campaign designed to measure the broad-line region size and estimate the mass of the black hole in this galaxy. We obtained 74 epochs of spectroscopic data using the Kast Spectrograph at the Lick 3-m telescope from February to November of 2012, and obtained complementary V-band images from five other ground-based telescopes. We measured the Hbeta light curve lag with respect to the V-band continuum light curve using both cross-correlation techniques (CCF) and continuum light curve variability modeling with the JAVELIN method, and found rest-frame lags of CCF = 13.53+2.03 2.32 days and JAVELIN = 13.15+1.08 1.00 days. The Hbeta root-mean-square line profile has a width of sigma line = 770 +/- 49 km s(exp -1). Combining these two results and assuming a virial scale factor of f = 5.13, we obtained a virial estimate of M(sub BH) = 8.06+1.59 1.72 10(exp 6) solar mass for the mass of the central black hole and an Eddington ratio of L/L(sub Edd) (is) approx. 0.2. We also obtained consistent but slightly shorter emission-line lags with respect to the Kepler light curve. Thanks to the Kepler mission, the light curve of KA1858+4850 has among the highest cadences and signal-to-noise ratios ever measured for an active galactic nucleus; thus, our black hole mass measurement will serve as a reference point for relations between black hole mass and continuum variability characteristics in active galactic nuclei. |
| NASA分類 | Astrophysics |
| レポートNO | GSFC-E-DAA-TN23214 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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