2005A&A...443..929P


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.07CET04:46:02

2005A&A...443..929P - Astronomy and Astrophysics, volume 443, 929-943 (2005/12-1)

Galactic structure from the Calar Alto Deep Imaging Survey (CADIS).

PHLEPS S., DREPPER S., MEISENHEIMER K. and FUCHS B.

Abstract (from CDS):

We used 1627 faint (15.5≤R≤23) stars in five fields of the Calar Alto Deep Imaging Survey (CADIS) to estimate the structure parameters of the Galaxy. The results were derived by applying two complementary methods: first by fitting the density distribution function to the measured density of stars perpendicular to the Galactic plane, and second by modelling the observed colors and apparent magnitudes of the stars in the field, using Monte Carlo simulations. The best-fitting model of the Galaxy is then determined by minimising the C-statistic, a modified χ2. Our model includes a double exponential for the stellar disk with scaleheights h1 and h2 and a power law halo with exponent α. 24480 different parameter combinations have been simulated. Both methods yield consistent results: the best fitting parameter combination is α=3.0 (or α=2.5, if we allow for a flattening of the halo with an axial ratio of (c/a)=0.6), h1=300pc, h2=900pc, and the contribution of thick disk stars to the disk stars in the solar neighbourhood is found to be between 4 and 10%.

Abstract Copyright:

Journal keyword(s): Galaxy: structure

Simbad objects: 6

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Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 * mu. Cas SB* 01 08 16.39470 +54 55 13.2264 5.93 5.86 5.17 4.55 4.13 G5Vb 550 1
2 HD 23439A EB* 03 47 02.1134213149 +41 25 38.104505984   8.89 8.12 7.7   K2:V_Fe-1.3 220 0
3 HD 23439B SB* 03 47 02.6337938704 +41 25 42.244702950   11.72 10.96 8.2   K3Vp_Fe-1.0 108 2
4 HD 25329 PM* 04 03 14.9983565018 +35 16 23.806254921 9.75 9.37 8.50 7.75 7.23 K1VbFe-2 350 0
5 HD 103095 PM* 11 52 58.7683801554 +37 43 07.240082865 7.38 7.20 6.45 5.80 5.35 K1V_Fe-1.5 754 1
6 HD 120559 PM* 13 51 40.3897554726 -57 26 08.293465228 8.679 8.647 7.982 7.605 7.217 G7VFe-1.4CH-1 142 0

    Equat.    Gal    SGal    Ecl

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2021.03.07-04:46:02

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