Reverberation Mapping of PG 0934+013 with the Southern African Large Telescope
| Autor: | Dawoo Park, Encarni Romero-Colmenero, Ryan C. Hickox, Jong-Hak Woo, Steven M. Crawford, Hyun-Il Sung, Yiseul Jeon, Myungshin Im, Songyoun Park, Liuyi Pei, Aaron J. Barth, Hojin Cho, Changsu Choi |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
010504 meteorology & atmospheric sciences FOS: Physical sciences Astronomy and Astrophysics Astrophysics Light curve Astrophysics - Astrophysics of Galaxies 01 natural sciences Galaxy Virial theorem Spectral line Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) 0103 physical sciences Reverberation mapping Continuum (set theory) Emission spectrum Spectral resolution 010303 astronomy & astrophysics 0105 earth and related environmental sciences |
| Zdroj: | The Astrophysical Journal. 847:125 |
| ISSN: | 1538-4357 |
| DOI: | 10.3847/1538-4357/aa88a3 |
| Popis: | We present the variability and time lag measurements of PG 0934+013 based on a photometric and spectroscopic monitoring campaign over a two year period. We obtained 46 epochs of data from the spectroscopic campaign, which was carried out using the Southern African Large Telescope with $\sim$1 week cadence over two sets of 4 month-long observing period, while we obtained 80 epochs of \textit{B}-band imaging data using a few 1-m class telescopes. Due to the seven month gap between the two observing periods, we separately measured the time lags of broad emission lines including H$\beta$, by comparing the emission line light curve with the \textit{B}-band continuum light curve using the cross-correlation function techniques. We determined the H$\beta$ lag, $\tau_{\rm cent} = 8.46^{+2.08}_{-2.14}$ days in the observed-frame based on Year 2 data, while the time lag from Year 1 data was not reliably determined. Using the rms spectrum of Year 2 data, we measured the \Hb\ line dispersion \sigmaline = 668 $\pm$ 44 \kms\ after correcting for the spectral resolution. Adopting a virial factor f = 4.47 from Woo et al. 2015, we determined the black hole mass M$_{BH}$ = $3.13 ^{+0.91} _{-0.93} \times 10^{6}$ \msun based on the \Hb\ time lag and velocity. Comment: 13 pages, 10 figures, ApJ in press |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|