MOA 2003‐BLG‐37: A Bulge Jerk‐Parallax Microlens Degeneracy

  • Park B
  • et al.
49Citations
Citations of this article
6Readers
Mendeley users who have this article in their library.

Abstract

We analyze the Galactic bulge microlensing event MOA 2003-BLG-37. Although the Einstein timescale is relatively short, t E = 43 days, the light curve displays deviations consistent with parallax effects due to the Earth's accelerated motion. We show that the χ 2 surface has four distinct local minima that are induced by the "jerk-parallax" degeneracy, with pairs of solutions having projected Einstein radii r̃ E = 1.76 and 1.28 AU, respectively. This is the second event displaying such a degeneracy and the first toward the Galactic bulge. For both events, the jerk-parallax formalism accurately describes the offsets between the different solutions, giving hope that when extra solutions exist in future events they can easily be found. However, the morphologies of the χ 2 surfaces for the two events are quite different, implying that much remains to be understood about this degeneracy.

Cite

CITATION STYLE

APA

Park, B. ‐G., DePoy, D. L., Gaudi, B. S., Gould, A., … Yock, P. C. M. (2004). MOA 2003‐BLG‐37: A Bulge Jerk‐Parallax Microlens Degeneracy. The Astrophysical Journal, 609(1), 166–172. https://doi.org/10.1086/420926

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free