2010A&A...509A..70V


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.25CET20:38:42

2010A&A...509A..70V - Astronomy and Astrophysics, volume 509, A70-70 (2010/1-1)

The distance to the Andromeda galaxy from eclipsing binaries.

VILARDELL F., RIBAS I., JORDI C., FITZPATRICK E.L. and GUINAN E.F.

Abstract (from CDS):

The cosmic distance scale largely depends on distance determinations to galaxies of the Local Group. In this sense, the Andromeda galaxy (M31) is a key rung to better constrain the cosmic distance ladder. A project was started in 1999 to firmly establish a direct and accurate distance to M31 using eclipsing binaries (EBs). After the determination of the first direct distance to M31 from EBs, the second direct distance to an EB system is presented: M31VJ00443610+4129194. Light and radial velocity curves were obtained and fitted to derive the masses and radii of the components. The acquired spectra were combined and disentangled to determine the temperature of the components. The analysis of the studied EB resulted in a distance determination to M31 of (m-M)0=24.30±0.11mag. This result, when combined with the previous distance determination to M31, results in a distance modulus of (m-M)0=24.36±0.08mag (744±33kpc), fully compatible with other distance determinations to M31. With an error of only 4%, the obtained value firmly establishes the distance to this important galaxy and represents the fulfillment of the main goal of our project.

Abstract Copyright:

Journal keyword(s): binaries: eclipsing - stars: fundamental parameters - stars: distances - distance scale - galaxies: individual: M31

VizieR on-line data: <Available at CDS (J/A+A/509/A70): table1.dat>

Simbad objects: 9

goto Full paper

goto View the reference in ADS

Number of rows : 9

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 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11200 1
2 LGGS J004436.11+412919.7 EB* 00 44 36.10 +41 29 19.4   19.81 19.92     ~ 4 0
3 LGGS J004438.01+412923.9 EB* 00 44 38.00 +41 29 23.7   19.17 19.22     ~ 6 0
4 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5247 1
5 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5854 1
6 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15191 1
7 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2168 3
8 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0Va 2537 0
9 NAME Local Group GrG ~ ~           ~ 7181 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2010A&A...509A..70V and select 'bookmark this link' or equivalent in the popup menu


2021.02.25-20:38:42

© Université de Strasbourg/CNRS

    • Contact