OGLE-2005-BLG-153: 微引力透镜发现与表征一个极低质量双星系统
太阳与恒星天体物理
2015-05-19 v2
摘要
双星的质量函数和统计特性为恒星形成过程提供了重要的诊断依据。尽管其重要性，但由于观测对象亮度微弱带来的困难，低质量端的质量函数仍然知之甚少。在此，我们报告通过微引力透镜发现并表征了一个由刚超过氢燃烧极限的极低质量恒星组成的双透镜系统。结合爱因斯坦半径和微透镜视差的联合测量，我们测得双星成分的质量分别为 和 。这一发现表明，微引力透镜将提供一种测量所有银河系极低质量双星种群质量函数的方法，该方法不受种群光度引起的偏差影响。
引用
@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}
}
备注
6 pages, 3 figures, 1 table