2008A&A...488..935G


Query : 2008A&A...488..935G

2008A&A...488..935G - Astronomy and Astrophysics, volume 488, 935-941 (2008/9-4)

The red clump absolute magnitude based on revised Hipparcos parallaxes.

GROENEWEGEN M.A.T.

Abstract (from CDS):

Over the past decade the use of the red clump (RC) as distance indicator has increased in importance as this evolutionary phase is well populated and a good local calibration exists. The absolute calibration of the RC in the I and K band is investigated again based on the recently published revised Hipparcos parallaxes. A numerical model is developed that takes the various selection criteria and the properties of the Hipparcos catalogue into account. The biases involved in applying certain selections are estimated with this model. The absolute magnitudes that are found are MI=-0.22±0.03 and MK=-1.54±0.04 (on the 2MASS system). The I-band value is in good agreement with previous determinations, the K-band value is fainter than previously quoted, and this seems to be related to a selection bias whereby accurate K-magnitudes are only available for relatively few bright stars. Applying population corrections to the absolute K magnitude of RC stars in clusters supports the fainter magnitude scale.

Abstract Copyright:

Journal keyword(s): stars: distances - cosmology: distance scale

Simbad objects: 12

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Number of rows : 12
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3782 0
2 NGC 188 OpC 00 47 12 +85 14.6           ~ 885 0
3 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1031 0
4 IC 1613 GiC 01 04 54.2 +02 08 00   10.42 10.01 9.77   ~ 1188 2
5 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5609 1
6 NAME Fornax Dwarf Spheroidal G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1660 1
7 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16522 1
8 Cl Berkeley 39 OpC 07 46 48 -04 39.9           ~ 178 1
9 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13449 0
10 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4049 3
11 NGC 6791 OpC 19 20 53 +37 46.7   10.52 9.5     ~ 987 0
12 NAME Galactic Bulge reg ~ ~           ~ 4014 0

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2023.02.02-19:57:19

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