The orbits of the triple-star system 1 geminorum from phases differential astrometry and spectroscopy

Journal Article · Sat Mar 01 00:00:00 EST 2014 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/783/1/3· OSTI ID:22351394

Lane, Benjamin F. ^[1]; Muterspaugh, Matthew W. ^[2]; Griffin, R. F. ^[3]; Scarfe, C. D. ^[4]; Fekel, Francis C.; Williamson, Michael H. ^[5]; Eaton, Joel A. ^[6]; Shao, M.; Colavita, M. M. ^[7]; Konacki, Maciej ^[8]

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1. The Charles Stark Draper Laboratory, Inc., 555 Technology Square, Cambridge, MA 02139 (United States)
2. Department of Mathematical Sciences, College of Engineering, Tennessee State University, Boswell Science Hall, Nashville, TN 37209 (United States)
3. The Observatories, Institute of Astronomy, Madingley Road, Cambridge CB3 0HA (United Kingdom)
4. Department of Physics and Astronomy, University of Victoria, BC V8W 3P6 (Canada)
5. Center of Excellence in Information Systems, Tennessee State University, 3500 John A. Merritt Boulevard, Box 9501, Nashville, TN 37209 (United States)
6. 7050 Bakerville Road, Waverly, TN 37185 (United States)
7. Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States)
8. Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, Rabianska 8, 87-100 Torun (Poland)

We have used precise differential astrometry from the Palomar High-precision Astrometric Search for Exoplanet Systems project and radial-velocity measurements covering a time span of 40 yr to determine the orbital parameters of the 1 Geminorum triple system. We present the first detection of the spectral lines of the third component of the system, together with precise mass (0.5%) and distance (0.15%) determinations for this system. In addition, our astrometry allows us to make the first determination of the mutual inclination of the orbits.

• OSTI ID: 22351394
• Journal Information: Astrophysical Journal, Vol. 783, 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
DETECTION
DISTANCE
INCLINATION
MASS
ORBITS
RADIAL VELOCITY
SPECTROSCOPY
STARS