2010A&A...524A..71B


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.12CET08:27:57

2010A&A...524A..71B - Astronomy and Astrophysics, volume 524, A71-71 (2010/12-1)

The inner halo of M 87: a first direct view of the red-giant population.

BIRD S., HARRIS W.E., BLAKESLEE J.P. and FLYNN C.

Abstract (from CDS):

An unusually deep (V, I) imaging dataset for the Virgo supergiant M 87 with the Hubble Space Telescope ACS successfully resolves its brightest red-giant stars, reaching MI(lim)=-2.5. After assessing the photometric completeness and biasses, we use this material to estimate the metallicity distribution for the inner halo of M 87, finding that the distribution is very broad and likely to peak near [m/H]~=-0.4 and perhaps higher. The shape of the MDF strongly resembles that of the inner halo for the nearby giant E galaxy NGC 5128. As a byproduct of our study, we also obtain a preliminary measurement of the distance to M 87 with the TRGB (red-giant branch tip) method; the result is (m-M)0=31.12±0.14 (d=16.7±0.9Mpc). Averaging this result with three other recent techniques give a weighted mean d(M 87)=(16.4±0.5)Mpc.

Abstract Copyright:

Journal keyword(s): galaxies: stellar content - galaxies: halos - galaxies: individual: M 87

Simbad objects: 11

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Number of rows : 11

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10574 1
2 NGC 3377 GiP 10 47 42.400 +13 59 08.30 11.55 11.24 10.38     ~ 717 1
3 M 105 LIN 10 47 49.600 +12 34 53.87   10.56 9.76 9.12 8.18 ~ 1364 0
4 M 86 GiG 12 26 11.814 +12 56 45.49 10.32 9.83 8.90   7.50 ~ 995 1
5 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5655 0
6 IC 3388 GiG 12 28 28.0538936001 +12 49 25.297950754   15.4 14.73   13.73 ~ 59 0
7 NAME Virgo Region reg 12 30.8 +12 23           ~ 117 1
8 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6033 3
9 ACO 3526 ClG 12 48 51.8 -41 18 21           ~ 958 2
10 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 3894 3
11 NAME Local Group GrG ~ ~           ~ 6674 0

    Equat.    Gal    SGal    Ecl

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2019.11.12-08:27:57

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