Estimating black hole masses in young radio sources using CFHT spectroscopy

Abstract

The correlation between black hole masses and stellar velocity dispersions provides an efficient method to determine the masses of black holes in active galaxies. We obtained optical spectra of a Compact-Steep-Spectrum (CSS) galaxy 4C +29.70, using the Canada-France-Hawaii Telescope (CFHT) equipped with OSIS, in August 6, 2003. Several stellar absorption features, such as Mg I (5175Å), Ca E band (5269Å) and Na D (5890Å), were detected in the spectra. The stellar velocity dispersion, $\sigma$, of the host galaxy, measured from absorption features is $\approx 250km{\mathrm{s}}^{-1}$. If 4C +29.70 follows the ${\mathrm{M}}_{\mathrm{BH}}-\sigma$ relation established for nearby galaxies, then its central black hole has a mass of $\approx 3.3\times 10^8{\mathrm{M}}_{\odot }$. In combination with the black hole masses of seven GPS galaxies in Snellen et al. (2003), we find that the average black hole mass of these eight young radio sources is smaller than that of the Bettoni et al. (2003) sample of extended radio galaxies. This may indicate that young radio sources are likely at the early evolutionary stage of radio galaxies, at which the central black holes may still undergo rapid growth. However, this needs further investigations.

2009, AN, 330, 253 `4th CSS/GPS workshop', Riccione, Italy, May 2008

References in corpus (24)

• Unified Schemes for Radio-Loud Active Galactic Nuclei
• A Fundamental Relation Between Supermassive Black Holes and Their Host Galaxies
• A Relationship Between Nuclear Black Hole Mass and Galaxy Velocity Dispersion
• The slope of the black-hole mass versus velocity dispersion correlation
• An Observational Determination of the Bolometric Quasar Luminosity Function
• Observational constraints on growth of massive black holes
• Black Hole Mass Estimates from Reverberation Mapping and from Spatially Resolved Kinematics
• Supermassive Black Holes in Active Galactic Nuclei. I. The Consistency of Black Hole Masses in Quiescent and Active Galaxies
• Black Hole Mass, Velocity Dispersion and the Radio Source in AGN
• The dividing line between FR I and FR II radio--galaxies
• An evolutionary scenario for blazar unification
• High-Dispersion Spectroscopy of Luminous, Young Star Clusters: Evidence for Present-Day Formation of Globular Clusters
• The Blazar Main Sequence
• The black hole mass of low redshift radiogalaxies
• Dynamical Evidence for a Luminous, Young Globular Cluster in NGC 1569
• The X-ray view of Giga-Hertz Peaked Spectrum Radio Galaxies
• The Link Between Star Formation and Accretion in LINERs: A Comparison with other AGN Subclasses
• The hard X-ray view of Giga-Hertz Peaked Spectrum Radio Galaxies
• Optical spectroscopy of faint gigahertz peaked spectrum sources
• The Central Engines of Radio-Loud Quasars
• Location of Weak CSS Sources on the Evolutionary Path of Radio-loud AGN
• Fundamental galaxy parameters for radio-loud AGN and the black hole - radio power connection
• The relation between star formation rate and accretion rate in LINERs
• CSSs in a sample of B2 radio sources of intermediate strength

Cited by in corpus (3)

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• Accretion/Jet Activity and Narrow [O III] Kinematics in Young Radio Galaxies