OGLE-2005-BLG-153: Microlensing Discovery and Characterization of A Very Low Mass Binary
Abstract
The mass function and statistics of binaries provide important diagnostics of the star formation process. Despite this importance, the mass function at low masses remains poorly known due to observational difficulties caused by the faintness of the objects. Here we report the microlensing discovery and characterization of a binary lens composed of very low-mass stars just above the hydrogen-burning limit. From the combined measurements of the Einstein radius and microlens parallax, we measure the masses of the binary components of and . This discovery demonstrates that microlensing will provide a method to measure the mass function of all Galactic populations of very low mass binaries that is independent of the biases caused by the luminosity of the population.
Keywords
Cite
@article{arxiv.1009.0344,
title = {OGLE-2005-BLG-153: Microlensing Discovery and Characterization of A Very Low Mass Binary},
author = {K. -H. Hwang and A. Udalski and C. Han and Y. -H. Ryu and I. A. Bond and J. -P. Beaulieu and M. Dominik and K. Horne and A. Gould and B. S. Gaudi and M. Kubiak and M. K. Szymanski and G. Pietrzynski and I. Soszynski and O. Szewczyk and K. Ulaczyk and L. Wyrzykowski and F. Abe and C. S. Botzler and J. B. Hearnshaw and Y. Itow and K. Kamiya and P. M. Kilmartin and K. Masuda and Y. Matsubara and M. Motomura and Y. Muraki and S. Nakamura and K. Ohnishi and C. Okada and N. Rattenbury and To. Saito and T. Sako and M. Sasaki and D. J. Sullivan and T. Sumi and P. J. Tristram and J. N. Wood and P. C. M. Yock and T. Yoshioka and M. Albrow and D. P. Bennett and D. M. Bramich and S. Brillant and J. A. R. Caldwell and J. J. Calitz and A. Cassan and K. H. Cook and E. Corrales and C. Coutures and M. Desort and S. Dieters and D. Dominis and J. Donatowicz and P. Fouque and J. Greenhill and K. Harpsoe and K. Hill and M. Hoffman and U. G. Jorgensen and S. Kane and D. Kubas and R. Martin and J. -B. Marquette and P. Meintjes and J. Menzies and K. Pollard and K. Sahu and I. Steele and C. Vinter and J. Wambsganss and A. Williams and K. Woller and M. Burgdorf and C. Snodgrass and M. Bode and D. L. Depoy and C. -U. Lee and B. -G. Park and R. W. Pogge},
journal= {arXiv preprint arXiv:1009.0344},
year = {2015}
}
Comments
6 pages, 3 figures, 1 table