Spectroscopic Studies of the Two Eros Candidate Microlensed Stars
Abstract
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.
Cite
@article{arxiv.astro-ph/9411051,
title = {Spectroscopic Studies of the Two Eros Candidate Microlensed Stars},
author = {J. P. Beaulieu and R. Ferlet and Ph. Grison and A. Vidal-Madjar and J. P. Kneib and E. Maurice and L. Prevot and C. Gry and J. Guibert and O. Moreau and F. Tajahmady and E. Aubourg and P. Bareyre and S. Brehin and M. Gros and M. Lachieze-Rey and B. Laurent and E. Lesquoy and C. Magneville and A. Milsztajn and L. Moscoso and F. Queinnec and J. Rich and M. Spiro and L. Vigroux and S. Zylberajch and R. Ansari and F. Cavalier and M. Moniez},
journal= {arXiv preprint arXiv:astro-ph/9411051},
year = {2007}
}
Comments
5 pages, uuencoded compressed PS file, including 1 figure. submitted to Astronomy and Astrophysics, 28 July, 1994