NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-24 T22:29:42 PDT
Help | Comment | NED Home

For refcode 2011ApJ...738...17G:
Retrieve 50 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2011ApJ...738...17G Observational Selection Effects and the M-{sigma} Relation Gultekin, Kayhan; Tremaine, Scott; Loeb, Abraham; Richstone, Douglas O. Abstract. We examine the possibility that the observed relation between black hole mass and host-galaxy stellar velocity dispersion (the M-{sigma} relation) is biased by an observational selection effect, the difficulty of detecting a black hole whose sphere of influence is smaller than the telescope resolution. In particular, we critically investigate recent claims that the M-{sigma} relation only represents the upper limit to a broad distribution of black hole masses in galaxies of a given velocity dispersion. We find that this hypothesis can be rejected at a high confidence level, at least for the early-type galaxies with relatively high velocity dispersions (median 268 km s^-1^) that comprise most of our sample. We also describe a general procedure for incorporating observational selection effects in estimates of the properties of the M-{sigma} relation. Applying this procedure we find results that are consistent with earlier estimates that did not account for selection effects, although with larger error bars. In particular, (1) the width of the M-{sigma} relation is not significantly increased, (2) the slope and normalization of the M-{sigma} relation are not significantly changed, and (3) most or all luminous early-type galaxies contain central black holes at zero redshift. Our results may not apply to late-type or small galaxies, which are not well represented in our sample. Key words: black hole physics, galaxies: bulges, galaxies: general, galaxies: nuclei, methods: statistical
Retrieve 50 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home