2015ApJ...807..136B


Query : 2015ApJ...807..136B

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.

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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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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026
#notes
1 ACO 85 ClG 00 41 36.21 -09 19 30.4           ~ 974 0
2 MCG-02-02-086 rG 00 41 50.45002 -09 18 11.4633   14 13.52 12.94   ~ 154 1
3 SDSS J091944.27+562201.1 BiC 09 19 44.2712594880 +56 22 01.127418636           ~ 16 0
4 NGC 4473 GiG 12 29 48.878 +13 25 45.55 11.60 11.16 10.20     ~ 671 1
5 NGC 4874 LIN 12 59 35.7093764280 +27 57 33.293892204 13.01 13.7 12.71 12.27 11.386 ~ 814 3
6 Z 49-90 Sy2 15 16 44.4893939136 +07 01 17.825410740   15.19 14.17     ~ 463 4
7 ACO 2261 ClG 17 22 26.9 +32 07 58           ~ 370 0
8 NVSS J172227+320757 rG 17 22 27.185 +32 07 57.25           ~ 47 1

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