MOA-2010-BLG-523: 'FAILED PLANET' = RS CVn STAR

Journal Article · Fri Feb 15 00:00:00 EST 2013 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/763/2/141· OSTI ID:22167101

Gould, A.; Yee, J. C.; Pinsonneault, M. H.; Dong, Subo; Gaudi, B. S.; Hung, L. -W. ^[1]; Bond, I. A. ^[2]; Udalski, A. ^[3]; Han, C. ^[4]; Jorgensen, U. G. ^[5]; Greenhill, J. ^[6]; Tsapras, Y. ^[7]; Bensby, T. ^[8]; Allen, W. ^[9]; Almeida, L. A.; Jablonski, F. ^[10]; Bos, M. ^[11]; Christie, G. W. ^[12]; DePoy, D. L. ^[13]; Lee, C. -U. ^[14] ; Consortium, MiNDSTEp; others, and

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1. Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210 (United States)
2. Institute for Information and Mathematical Sciences, Massey University, Private Bag 102-904, Auckland 1330 (New Zealand)
3. Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa (Poland)
4. Department of Physics, Chungbuk National University, Cheongju 361-763 (Korea, Republic of)
5. Niels Bohr Institutet, Kobenhavns Universitet, Juliane Maries Vej 30, DK-2100 Copenhagen (Denmark)
6. University of Tasmania, School of Mathematics and Physics, Private Bag 37, Hobart, TAS 7001 (Australia)
7. Las Cumbres Observatory Global Telescope Network, 6740B Cortona Dr, Goleta, CA 93117 (United States)
8. Lund Observatory, Department of Astronomy and Theoretical Physics, Box 43, SE-221 00 Lund (Sweden)
9. Vintage Lane Observatory, Blenheim (New Zealand)
10. Divisao de Astrofisica, Instituto Nacional de Pesquisas Espaciais, Avenida dos Astronautas, 1758 Sao Jose dos Campos, 12227-010 SP (Brazil)
11. Molehill Astronomical Observatory, North Shore (New Zealand)
12. Auckland Observatory, Auckland (New Zealand)
13. Department of Physics and Astronomy, Texas A and M University, College Station, TX 77843-4242 (United States)
14. Korea Astronomy and Space Science Institute, 776 Daedukdae-ro, Yuseong-gu, Daejeon 305-348 (Korea, Republic of)

The Galactic bulge source MOA-2010-BLG-523S exhibited short-term deviations from a standard microlensing light curve near the peak of an A {sub max} {approx} 265 high-magnification microlensing event. The deviations originally seemed consistent with expectations for a planetary companion to the principal lens. We combine long-term photometric monitoring with a previously published high-resolution spectrum taken near peak to demonstrate that this is an RS CVn variable, so that planetary microlensing is not required to explain the light-curve deviations. This is the first spectroscopically confirmed RS CVn star discovered in the Galactic bulge.

• OSTI ID: 22167101
• Journal Information: Astrophysical Journal, Vol. 763, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
DIAGRAMS
GRAVITATIONAL LENSES
MONITORING
PLANETS
RESOLUTION
SPECTRA
STARS
STARSPOTS