Spectroscopic Studies of the Two Eros Candidate Microlensed Stars

Details Spectroscopic Studies of the Two Eros Candidate Microlensed Stars Spectroscopic Studies of the Two Eros Candidate Microlensed Stars

1994-11-14

arxiv.org/abs/astro-ph/9411051v1

Astronomy and Astrophysics

Astrophysics

5 pages, uuencoded compressed PS file, including 1 figure. submitted to Astronomy and Astrophysics, 28 July, 1994

Scientific paper

Low resolution spectroscopy, and UBVRI photometry, have been obtained for the two EROS microlensing candidates. Radial velocities indicate that both stars are members of the Large Magellanic Cloud. The spectrum and the colours of EROS1, the first candidate, reveal that it is a moderately reddened main-sequence B star with H emission lines. The presence of H absorption lines seems to be more the signature of a normal star than that of a cataclysmic variable. As to EROS2, the second candidate, its spectrum and photometry are those of an unreddened normal main-sequence A star, but it cannot be totally excluded that they represent those of a nova in the pre-outburst phase. Although it is not yet possible to exclude intrinsic stellar variations, the interpretation in terms of microlensing effects remain the most natural one.

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