SIMBAD references

2003MNRAS.343..505F - Mon. Not. R. Astron. Soc., 343, 505-511 (2003/August-1)

Host galaxies and black hole masses of low- and high-luminosity radio-loud active nuclei.


Abstract (from CDS):

We investigate the host galaxy luminosities of BL Lac objects (BLLs) and radio-loud quasars (RLQs) at z < 0.5, imaged with the Hubble Space Telescope (HST). From a homogeneous treatment of the data, we construct the host-galaxy luminosity functions (HGLFs) and find that RLQ hosts are ∼0.5 mag brighter than those of BLLs: <MR>RLQ=-24.0, <MR>BLL =-23.5. For both classes, the HGLFs exhibit a remarkably different distribution with respect to that of normal (inactive) ellipticals, with clear preference for more luminous galaxies to show nuclear activity. We make use of the black hole mass-bulge luminosity (MBH-Lbulge) relation, derived for nearby inactive ellipticals, to estimate the central black hole mass in our sample of radio-loud active galaxies. In spite of a ∼2 mag difference of intrinsic nuclear luminosity, BLLs and RLQs have black holes (BHs) of similar mass (<MBH/M>BLL=5.6x108, <MBH/M >RLQ= 1.0x109). This implies that the two types of objects are radiating at very different rates with respect to their Eddington luminosity.

Abstract Copyright: 2003 RAS

Journal keyword(s): black hole physics - galaxies: active - BL Lacertae objects: general - galaxies: photometry - quasars: general

CDS comments: Table 3: B21425+267 not identified

Simbad objects: 75

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