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29 March 2024
 
  » arxiv » 1411.6334

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Cosmic Evolution of Black Holes and Spheroids. V. The Relation Between Black Hole Mass and Host Galaxy Luminosity for a Sample of 79 Active Galaxies
Daeseong Park ; Jong-Hak Woo ; Vardha N. Bennert ; Tommaso Treu ; Matthew W. Auger ; Matthew A. Malkan ;
Date 24 Nov 2014
AbstractWe investigate the cosmic evolution of the black hole (BH) mass -- bulge luminosity relation using a sample of 52 active galaxies at $z sim 0.36$ and $z sim 0.57$ in the BH mass range of $10^{7.4-9.1} M_{odot}$. By consistently applying multi-component spectral and structural decomposition to high-quality Keck spectra and high-resolution HST images, BH masses ($M_{ m BH}$) are estimated using the H$eta$ broad emission line combined with the 5100 AA nuclear luminosity, and bulge luminosities ($L_{ m bul}$) are derived from surface photometry. Comparing the resulting $M_{ m BH}-L_{ m bul}$ relation to local active galaxies and taking into account selection effects, we find evolution of the form $M_{ m BH} / L_{ m bul} propto (1+z)^{gamma}$ with $gamma=1.8pm0.7$, consistent with BH growth preceding that of the host galaxies. Including an additional sample of 27 active galaxies with $0.5<z<1.9$ taken from the literature and measured in a consistent way, we obtain $gamma=0.9pm0.7$ for the $M_{ m BH}-L_{ m bul}$ relation and $gamma=0.4pm0.5$ for the $M_{ m BH}$--total host galaxy luminosity ($L_{ m host}$) relation. The results strengthen the findings from our previous studies and provide additional evidence for host-galaxy bulge growth being dominated by disk-to-bulge transformation via minor mergers and/or disk instabilities.
Source arXiv, 1411.6334
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