Extreme Magnification Microlensing Event OGLE-2008-BLG-279: Strong Limits on Planetary Companions to the Lens Star

J.C. Yee, A. Udalski, T. Sumi, S. Dong, S. Kozlowski, J.C. Bird, A.A. Cole, D. Higgins, J. Mccormick, L.A.G. Monard, D. Polishook, A. Shporer, O. Spector, M.K. Szymanski, M. Kubiak, G. Pietrzynski, I. Soszynski, O. Szewczyk, K. Ulaczyk, L. WyrzykowskiR. Poleski, W. Allen, M. Bos, G.W. Christie, D.L. Depoy, J.D. Eastman, B.S. Gaudi, A. Gould, C. Han, S. Kaspi, C.U. Lee, F. Mallia, A. Maury, D. Maoz, T. Natusch, B.G. Park, R.W. Pogge, R. Santallo, F. Abe, I.A. Bond, A. Fukui, K. Furusawa, J.B. Hearnshaw, S. Hosaka, Y. Itow, K. Kamiya, A.V. Korpela, P.M. Kilmartin, W. Lin, C.H. Ling, S. Makita, K. Masuda, Y. Matsubara, N. Miyake, Y. Muraki, M. Nagaya, K. Nishimoto, K. Ohnishi, Y.C. Perrott, N.J. Rattenbury, T. Sako, T. Saito, L. Skuljan, D.J. Sullivan, W.L. Sweatman, P.J. Tristram, P.C.M. Yock, M.D. Albrow, V. Batista, P. Fouque, J.P. Beaulieu, D.P. Bennett, A. Cassan, J. Comparat, C. Coutures, S. Dieters, J.G. Greenhill, K. Horne, N. Kains, D. Kubas, R. Martin, J. Menzies, J. Wambsganss, Andrew Williams, M. Zub

    Research output: Contribution to journalArticle

    45 Citations (Scopus)

    Abstract

    We analyze the extreme high-magnification microlensing event OGLE-2008-BLG-279, which peaked at a maximum magnification of A ~ 1600 on 2008 May 30. The peak of this event exhibits both finite-source effects and terrestrial parallax, from which we determine the mass of the lens, Ml = 0.64 ± 0.10 M , and its distance, Dl = 4.0 ± 0.6 kpc. We rule out Jupiter-mass planetary companions to the lens star for projected separations in the range 0.5-20 AU. More generally, we find that this event was sensitive to planets with masses as small as 0.2 M_Earth ~= 2 M_Mars with projected separations near the Einstein ring (~3 AU).
    Original languageEnglish
    Pages (from-to)2082-2090
    JournalThe Astrophysical Journal
    Volume703
    Issue number2
    DOIs
    Publication statusPublished - 2009

    Fingerprint Dive into the research topics of 'Extreme Magnification Microlensing Event OGLE-2008-BLG-279: Strong Limits on Planetary Companions to the Lens Star'. Together they form a unique fingerprint.

    Cite this