2008A&A...489.1209P


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.04CEST22:54:17

2008A&A...489.1209P - Astronomy and Astrophysics, volume 489, 1209-1212 (2008/10-3)

In search of RR Lyrae type stars in eclipsing binary systems OGLE052218.07-692827.4: an optical blend.

PRSA A., GUINAN E.F., DEVINNEY E.J. and ENGLE S.G.

Abstract (from CDS):

During the OGLE-2 operation, Soszynski et al. (2003AcA....53...93S) found 3 LMC candidates for an RR Lyr-type component in an eclipsing binary system. Two of those have orbital periods that are too short to be physically plausible and hence have to be optical blends. For the third, OGLE 052218.07-692827.4, we developed a model of the binary that could host the observed RR Lyr star. After being granted HST/WFPC2 time, however, we were able to resolve 5 distinct sources within a 1.3'' region that is typical of OGLE resolution, proving that OGLE 052218.07-692827.4 is also an optical blend. Moreover, the putative eclipsing binary signature found in the OGLE data does not seem to correspond to a physically plausible system; the source is likely another background RR Lyr star. There are still no RR Lyr stars discovered so far in an eclipsing binary system.

Abstract Copyright:

Journal keyword(s): methods: data analysis - methods: observational - stars: binaries: close - stars: binaries: eclipsing - stars: variables: RR Lyr - stars: individual: OGLE 052218.07-692827.4

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 OGLE LMC-SC11 11200 RR* 05 07 31.02 -69 30 10.4   19.70 19.41   18.86 ~ 5 0
2 OGLE LMC-SC7 192882 RR* 05 18 22.50 -69 18 17.1   17.98 17.84   17.73 ~ 7 0
3 OGLE LMC-SC6 433519 RR* 05 22 17.95 -69 28 27.3   19.01 18.62   18.09 ~ 7 0
4 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14867 1

    Equat.    Gal    SGal    Ecl

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2020.08.04-22:54:17

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