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

Details MOA 2003-BLG-37: A Bulge Jerk-Parallax Microlens Degeneracy MOA 2003-BLG-37: A Bulge Jerk-Parallax Microlens Degeneracy

2004-01-13

arxiv.org/abs/astro-ph/0401250v2

Astrophys.J. 609 (2004) 166-172

Astronomy and Astrophysics

Astrophysics

19 pages, 3 figures, 1 table, ApJ, in press, 1 July 2004

Scientific paper

10.1086/420926

We analyze the Galactic bulge microlensing event MOA-2003-BLG-37. Although the Einstein timescale is relatively short, t_e=43 days, the lightcurve displays deviations consistent with parallax effects due to the Earth's accelerated motion. We show that the chi^2 surface has four distinct local minima that are induced by the ``jerk-parallax'' degeneracy, with pairs of solutions having projected Einstein radii, \tilde r_e = 1.76 AU 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 chi^2 surfaces for the two events are quite different, implying that much remains to be understood about this degeneracy.

Affiliated with

Also associated with

No associations

Rating

MOA 2003-BLG-37: A Bulge Jerk-Parallax Microlens Degeneracy does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with MOA 2003-BLG-37: A Bulge Jerk-Parallax Microlens Degeneracy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and MOA 2003-BLG-37: A Bulge Jerk-Parallax Microlens Degeneracy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-633774