astro-ph

The Initial Mass Function of the Orion Nebula Cluster across the H-burning limit

Nicola Da Rio (1), Massimo Robberto (2), Lynne A. Hillenbrand (3), Thomas Henning (4), Keivan G. Stassun (5) ((1) ESA/ESTEC, (2) STScI, (3) Caltech (4) MPIA, (5) Vanderbilt)
I-bandを使って有効温度を導出して、ONCのIMFを計算した。フィールド星との区別もうまくできているらしい。でも、それって・・・本当に?どうやって?
http://arxiv.org/abs/1112.2711

High resolution imaging of young M-type stars of the solar neighborhood: Probing the existence of companions down to the mass of Jupiter

P. Delorme, A. M. Lagrange, G. Chauvin, M. Bonavita, S. Lacour, M. Bonnefoy, D. Ehrenreich, H. Beust
http://arxiv.org/abs/1112.3008