ADDITIONAL MASSIVE BINARIES IN THE CYGNUS OB2 ASSOCIATION

Journal Article · Thu Mar 01 00:00:00 EST 2012 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/747/1/41· OSTI ID:22016316

Kiminki, Daniel C; Kobulnicky, Henry A; Ewing, Ian; Lundquist, Michael; Alexander, Michael; Vargas-Alvarez, Carlos; Choi, Heather ^[1]; Bagley Kiminki, Megan M ^[2]; Henderson, C B ^[3]

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1. Department of Physics and Astronomy, University of Wyoming, Laramie, WY 82070 (United States)
2. Department of Astronomy, University of Arizona, Tucson, AZ 85721 (United States)
3. Department of Astronomy, Ohio State University, Columbus, OH 43210 (United States)

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 1.5 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 two having full orbital solutions.

• OSTI ID: 22016316
• Journal Information: Astrophysical Journal, Vol. 747, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ASTROPHYSICS
BINARY STARS
MATHEMATICAL SOLUTIONS
RADIAL VELOCITY
SPECTROSCOPY