SIMBAD references

2015ApJ...807..136B - Astrophys. J., 807, 136 (2015/July-2)

Too big to be real? No depleted core in Holm 15A.

BONFINI P., DULLO B.T. and GRAHAM A.W.

Abstract (from CDS):

Partially depleted cores, as measured by core-Sérsic model ''break radii,'' are typically tens to a few hundred parsecs in size. Here we investigate the unusually large ( = 4.57 kpc) depleted core recently reported for Holm 15A, the brightest cluster galaxy of Abell 85. We model the one-dimensional (1D) light profile, and also the two-dimensional (2D) image (using Galfit-Corsair, a tool for fitting the core-Sérsic model in 2D). We find good agreement between the 1D and 2D analyses, with minor discrepancies attributable to intrinsic ellipticity gradients. We show that a simple Sérsic profile (with a low index n and no depleted core) plus the known outer exponential ''halo'' provide a good description of the stellar distribution. We caution that while almost every galaxy light profile will have a radius where the negative logarithmic slope of the intensity profile equals 0.5, this alone does not imply the presence of a partially depleted core within this radius.

Abstract Copyright:

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: individual: Holm 15A - galaxies: photometry - galaxies: structure

CDS comments: Galaxy HOLM 15A is MCG-02-02-086 in SIMBAD.

Simbad objects: 8

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