Daniel C. Kiminki, Henry A. Kobulnicky, Ian Ewing, Megan M. Bagley Kiminki, Michael Lundquist, Michael Alexander, Carlos Vargas-Alvarez, Heather Choi, Calen B. Henderson
We report the discovery and orbital solutions for two new OB binaries in the
Cygnus OB2 Association, MT311 (B2V+B3V) and MT605 (B0.5V+B2.5:V). We also
identify the system MT429 as a probable triple system consisting of a tight
eclipsing 2.97 day B3V+B6V pair and a B0V at a projected separation of 138 AU.
We further provide the first spectroscopic orbital solutions to the eclipsing,
double-lined, O-star binary MT696 (O9.5V+B1:V), the double-lined, early B
binary MT720 (B0-1V+B1-2V), and the double-lined, O-star binary MT771
(O7V+O9V). These systems exhibit orbital periods between 2.8 days and 12.3
days, with the majority having P<6 days. The two new binary discoveries and six
spectroscopic solutions bring the total number of known massive binaries in the
central region of the Cygnus OB2 Association to 20, with all but one having
full orbital solutions.
View original:
http://arxiv.org/abs/1112.3383
No comments:
Post a Comment