2002A&A...381..440S


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.24CET01:02:00

2002A&A...381..440S - Astronomy and Astrophysics, volume 381, 440-445 (2002/1-2)

An empirical method to estimate the LMC distance using B-stars in eclipsing binary systems.

SALARIS M. and GROENEWEGEN M.A.T.

Abstract (from CDS):

We present a new method to determine the distance to B-stars in eclipsing binary systems. The method is completely empirical, and it is based on the existence of a very tight linear relationship between the V-band ``zero magnitude angular diameter'' and the Stroemgren colour index c1 for B-stars; we have empirically calibrated this relationship using local single B-stars with accurate angular diameters, and B-stars in eclipsing binaries with precise radii and parallax determinations. By studying the differential behaviour of this relationship as predicted by theoretical stellar evolution models, we find that it is independent of the stellar metallicities for a range of [Fe/H] values between the solar one and that of young stars in the Magellanic Clouds. The method, which also provides the value of the reddening to the system, is discussed in detail, together with a thorough estimate of the associated errors. We conclude that accurate Stroemgren photometry obtainable with 1.5 m-class telescopes of the LMC eclipsing binaries HV 2274 and HV 982 will allow to obtain an empirical LMC distance with an accuracy of the order of 0.13mag.

Abstract Copyright:

Journal keyword(s): binaries: eclipsing - stars: distances - stars: individual: HD 24909, HD 161783, HD 218066, HV 982, HV 2274 - stars: fundamental parameters - Magellanic Clouds - distance scale

Simbad objects: 15

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Number of rows : 15

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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9656 1
2 * zet Phe Al* 01 08 23.0814982 -55 14 44.728914   3.908 4.014     B6V+B9V 222 0
3 V* IQ Per Al* 03 59 44.6764749090 +48 09 04.489098368   7.77 7.73     B9 143 0
4 SV* HV 2274 EB* 05 02 40.7806907576 -68 24 21.497024742 13.298 13.984 14.127 14.192 14.390 ~ 75 0
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15122 1
6 * gam Ori V* 05 25 07.86325 +06 20 58.9318 0.54 1.42 1.64 1.73 1.95 B2V 502 1
7 SV* HV 982 EB* 05 29 52.31 -69 09 22.6   14.76 14.648 14.99 14.761 ~ 45 0
8 * alf Leo PM* 10 08 22.31099 +11 58 01.9516 0.88 1.24 1.40 1.37 1.47 B8IVn 814 1
9 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 3055 0
10 V* GG Lup Al* 15 18 56.3758877921 -40 47 17.600335594   5.495 5.604 5.613   B7V 116 0
11 * del Sco SB* 16 00 20.00528 -22 37 18.1431 1.30 2.20 2.32 2.36 2.49 B0.3IV 699 0
12 V* V539 Ara Al* 17 50 28.3923147204 -53 36 44.664519556   5.60 5.71     B2/3Vnn 167 0
13 * alf Pav SB* 20 25 38.85705 -56 44 06.3230 1.03 1.791 1.918     B2IV 275 0
14 * alf Gru PM* 22 08 13.98473 -46 57 39.5078 1.11 1.58 1.71 1.75 1.83 B6V 291 0
15 HD 218066 Be* 23 04 02.2015433256 +63 23 48.645418835 7.50 7.97 7.6     B1.5Vn 268 0

    Equat.    Gal    SGal    Ecl

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2021.01.24-01:02:00

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