Broad line region and black hole mass of PKS 1510-089 from spectroscopic reverberation mapping

Suvendu Rakshit

doi:10.1051/0004-6361/202038324

paper

Broad line region and black hole mass of PKS 1510-089 from spectroscopic reverberation mapping

arXiv:2007.07672 · doi:10.1051/0004-6361/202038324

Abstract

Reverberation results of a flat spectrum radio quasar PKS 1510-089 are presented from 8.5-years long spectroscopic monitoring carried out in 9 observing seasons between December 2008 to June 2017 at Steward Observatory. Optical spectra show strong H $β$ , H $γ$ , and Fe II emission lines overlaying on a blue continuum. All the continuum and emission line light curves show significant variability with a fractional root-mean-square variation of $37.30 \pm 0.06$ % ( $f_{5100}$ ), $11.88 \pm 0.29$ % (H $β$ ) and $9.61 \pm 0.71$ % (H $γ$ ), however, along with thermal radiation from accretion disk non-thermal emission from jet also contribute to $f_{5100}$ . Several methods of time series analysis (ICCF, DCF, von Neumann, Bartels, JAVELIN, $χ^{2}$ ) are used to measure lag between continuum and line light curves. The observed frame BLR size is found to be $61. 1_{- 3.2}^{+ 4.0}$ ( $64. 7_{- 10.6}^{+ 27.1}$ ) light-days for H $β$ (H $γ$ ). Using $σ_{line}$ of $1262 \pm 247$ km s $^{- 1}$ measured from the rms spectrum, the black hole mass of PKS 1510-089 is estimated to be $5.7 1_{- 0.58}^{+ 0.62} \times 1 0^{7} M_{⊙}$ .

arXiv comment12 pages, accepted for publication in A&A

Broad line region and black hole mass of PKS 1510-089 from spectroscopic reverberation mapping

Abstract

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