Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-10-09
Astronomy and Astrophysics
Astrophysics
4 pages, 7 figures (4 color), uses emulateapj.cls. Replaced with ApJ Letters Accepted version. Conclusions are unchanged
Scientific paper
10.1086/520338
Using the extended J, H and K magnitudes provided by the 2MASS data archive, we consider the position of brightest cluster galaxies (BCGs) in the observed relations between inferred supermassive black hole (SMBH) mass and the host galaxy properties, as well as their position in the stellar velocity dispersion and luminosity (sigma-L) relation, compared to E and S0 galaxies. We find that SMBH masses (M) derived from near-infrared (NIR) magnitudes do not exceed 10e9.5Msol and that these masses agree well with the predictions made from sigma. In the NIR, there is no evidence that BCGs leave the sigma-L relation defined by less luminous galaxies. The higher SMBH masses predicted from V-band luminosities (M~10e10.5Msol) are attributed to the presence of extended envelopes around the BCGs, however, this will need to be confirmed using deeper multiwavelength imaging.
Axon David J.
Batcheldor Dan
Marconi Alessandro
Merritt David
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