MOA-2010-BLG-523:" Failed Planet"= RS CVn Star

A. Gould, J. C. Yee, I. A. Bond, A. Udalski, C. Han, U. G. Jorgensen, J. Greenhill, Y. Tsapras, M. H. Pinsonneault, Thomas Bensby, W. Allen, L. A. Almeida, M. Bos, G. W. Christie, D. L. DePoy, Subo Dong, B. S. Gaudi, L-W Hung, F. Jablonski, C-U LeeJ. McCormick, D. Moorhouse, J. A. Munoz, T. Natusch, M. Nola, R. W. Pogge, J. Skowron, G. Thornley, F. Abe, D. P. Bennett, C. S. Botzler, P. Chote, M. Freeman, A. Fukui, K. Furusawa, P. Harris, Y. Itow, C. H. Ling, K. Masuda, Y. Matsubara, N. Miyake, K. Ohnishi, N. J. Rattenbury, To. Saito, D. J. Sullivan, T. Sumi, D. Suzuki, W. L. Sweatman, P. J. Tristram, K. Wada, P. C. M. Yock, M. K. Szymanski, I. Soszynski, M. Kubiak, R. Poleski, K. Ulaczyk, G. Pietrzynski, L. Wyrzykowski, K. A. Alsubai, V. Bozza, P. Browne, M. J. Burgdorf, S. Calchi Novati, P. Dodds, M. Dominik, F. Finet, T. Gerner, S. Hardis, K. Harpsoe, F. V. Hessman, T. C. Hinse, M. Hundertmark, N. Kains, E. Kerins, C. Liebig, L. Mancini, M. Mathiasen, M. T. Penny, S. Proft, S. Rahvar, D. Ricci, K. C. Sahu, G. Scarpetta, S. Schaefer, F. Schoenebeck, C. Snodgrass, J. Southworth, J. Surdej, J. Wambsganss, R. A. Street, K. Horne, D. M. Bramich, I. A. Steele, M. D. Albrow, E. Bachelet, V. Batista, T. G. Beatty, J-P Beaulieu, C. S. Bennett, R. Bowens-Rubin, S. Brillant, J. A. R. Caldwell, A. Cassan, A. A. Cole, E. Corrales, C. Coutures, S. Dieters, D. Dominis Prester, J. Donatowicz, P. Fouque, C. B. Henderson, D. Kubas, J-B Marquette, R. Martin, J. W. Menzies, B. Shappee, A. Williams, J. van Saders, M. Zub

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The Galactic bulge source MOA-2010-BLG-523S exhibited short-term deviations from a standard microlensing light curve near the peak of an A(max) similar to 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.
    Original languageEnglish
    Article number141
    JournalAstrophysical Journal
    Volume763
    Issue number2
    DOIs
    Publication statusPublished - 2013

    Subject classification (UKÄ)

    • Astronomy, Astrophysics and Cosmology

    Free keywords

    • gravitational lensing: micro
    • planetary systems
    • starspots
    • stars:
    • variables: general

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