Eclipsing binaries in the Galactic bulge: candidates for distance estimates

被引:9
作者
Groenewegen, MAT [1 ]
机构
[1] Katholieke Univ Leuven, Sterrekundig Inst, PACS, ICC, B-3001 Heverlee, Belgium
关键词
stars : distances; binaries : eclipsing; Galaxy : center;
D O I
10.1051/0004-6361:20052886
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The 222 000 I-band light curves of variable stars detected by the OGLE-II. survey in the direction of the Galactic Bulge have been searched for eclipsing binaries ( EBs). A previously developed code to analyze lightcurve shapes and identify long period variables ( LPVs) has been adapted to identify EBs. The parameters in the modified code have been optimised to recover a list of about 140 detached EBs in the Small Magellanic Cloud previously identified in the literature as particularly well suited for distance estimates ( and wich have periods >= 0.85 days). The power of the code is demonstrated by identifying 16 and 178 previously uncatalogued EBs in the SMC and LMC, respectively. Among the 222 000 variable stars in the direction of the Galactic Bulge 3053 EBs have been identified. Periods and phased lightcurves are presented.
引用
收藏
页码:559 / 563
页数:5
相关论文
共 28 条
[1]   The MACHO Project LMC variable star inventory .5. Classification and orbits of 611 eclipsing binary stars [J].
Alcock, C ;
Allsman, RA ;
Alves, D ;
Axelrod, TS ;
Becker, AC ;
Bennett, DP ;
Cook, KH ;
Freeman, KC ;
Griest, K ;
Lacy, CHS ;
Lehner, MJ ;
Marshall, SL ;
Minniti, D ;
Peterson, BA ;
Pratt, MR ;
Quinn, PJ ;
Rodgers, AW ;
Stubbs, CW ;
Sutherland, W ;
Welch, DL .
ASTRONOMICAL JOURNAL, 1997, 114 (01) :326-340
[2]   ACCURATE MASSES AND RADII OF NORMAL STARS [J].
ANDERSEN, J .
ASTRONOMY AND ASTROPHYSICS REVIEW, 1991, 3 (02) :91-126
[3]  
[Anonymous], APJ
[4]   The MOA catalogue of eclipsing binary stars in the Small Magellanic Cloud [J].
Bayne, G ;
Tobin, W ;
Pritchard, JD ;
Bond, I ;
Pollard, KR ;
Besier, SC ;
Noda, S ;
Sumi, T ;
Yanagisawa, T ;
Sekiguchi, M ;
Honda, M ;
Muraki, Y ;
Takeuti, M ;
Hearnshaw, JB ;
Kilmartin, PM ;
Dodd, RJ ;
Sullivan, DJ ;
Yock, PCM .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2002, 331 (03) :609-614
[5]   Eclipsing binaries as precise standard candles [J].
Clausen, JV .
NEW ASTRONOMY REVIEWS, 2004, 48 (09) :679-685
[6]  
GRISON P, 1995, ASTRON ASTROPHYS SUP, V109, P447
[7]   Long period variables in the Magellanic Clouds: OGLE+2MASS+DENIS [J].
Groenewegen, MAT .
ASTRONOMY & ASTROPHYSICS, 2004, 425 (02) :595-613
[8]  
GROENEWEGEN MAT, 2005, UNPUB A A
[9]   Forty eclipsing binaries in the Small Magellanic Cloud: fundamental parameters and Cloud distance [J].
Hilditch, RW ;
Howarth, ID ;
Harries, TJ .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2005, 357 (01) :304-324
[10]  
NIKOLAEV S, 2003, APJ, V601, P260