Accession Number:

ADA497440

Title:

WIYN Open Cluster Study. XXXVI. Spectroscopic Binary Orbits in NGC 188

Descriptive Note:

Journal article

Corporate Author:

WISCONSIN UNIV-MADISON DEPT OF ASTRONOMY

Report Date:

2009-04-01

Pagination or Media Count:

19.0

Abstract:

We present 98 spectroscopic binary orbits resulting from our ongoing radial velocity survey of the old 7 Gyr open cluster NGC 188. All but 13 are high-probability cluster members based on both radial velocity and proper motion membership analyses. Fifteen of these member binaries are double lined. Our stellar sample spans a magnitude range of 10.8 less or equal V less or equal 16.5 1.14-0.92 solar mass and extends spatially to 17 pc approximately 13 core radii. All of our binary orbits have periods ranging from a few days to on the order of 10exponent 3 days, and thus are hard binaries that dynamically power the cluster. For each binary, we present the orbital solutions and place constraints on the component masses. Additionally, we discuss a few binaries of note from our sample, identifying a likely blue straggler - blue straggler binary system 7782, a double-lined binary with a secondary star which is underluminous for its mass 5080, two potential eclipsing binaries 4705 and 5762, and two binaries which are likely members of a quadruple system 5015a and 5015b.

Subject Categories:

  • Astrophysics
  • Celestial Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE