WIYN OPEN CLUSTER STUDY. LX. SPECTROSCOPIC BINARY ORBITS IN NGC 6819

We present the current state of the WOCS radial-velocity (RV) survey for the rich open cluster NGC 6819 (2.5 Gyr) including 93 spectroscopic binary orbits with periods ranging from 1.5 to 8000 days. These results are the product of our ongoing RV survey of NGC 6819 using the Hydra Multi-Object Spect...

Full description

Saved in:
Bibliographic Details
Published in:The Astronomical journal 2014-08, Vol.148 (2), p.1-20
Main Authors: Milliman, Katelyn E, Mathieu, Robert D, Geller, Aaron M, Gosnell, Natalie M, Meibom, Soren, PLATAIS, IMANTS
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
Clumps
ECLIPSE
Open clusters
ORBITS
PHOTOMETRY
RADIAL VELOCITY
Spectrographs
SPECTROSCOPY
STARS
TELESCOPES
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present the current state of the WOCS radial-velocity (RV) survey for the rich open cluster NGC 6819 (2.5 Gyr) including 93 spectroscopic binary orbits with periods ranging from 1.5 to 8000 days. These results are the product of our ongoing RV survey of NGC 6819 using the Hydra Multi-Object Spectrograph on the WIYN 3.5 m telescope. We also include a detailed analysis of multiple prior sets of optical photometry for NGC 6819. Within a 1[degrees] field of view, our stellar sample includes the giant branch, the red clump, and blue straggler candidates, and extends to almost 2 mag below the main sequence (MS) turnoff. For each star observed in our survey we present all RV measurements, the average RV, and velocity variability information. Additionally, we discuss notable binaries from our sample, including eclipsing binaries (WOCS 23009, WOCS 24009, and WOCS 40007), stars noted in Kepler asteroseismology studies (WOCS 4008, WOCS 7009, and WOCS 8007), and potential descendants of past blue stragglers (WOCS 1006 and WOCS 6002). We find the incompleteness-corrected binary fraction for all MS binaries with periods less than 10 super(4) days to be 22% + or - 3% and a tidal circularization period of 6.2 super(+1.1) sub(-1.1) days for NGC 6819.
ISSN:0004-6256
1538-3881
1538-3881
DOI:10.1088/0004-6256/148/2/38