Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apj...634l.173m&link_type=abstract
The Astrophysical Journal, Volume 634, Issue 2, pp. L173-L176.
Astronomy and Astrophysics
Astronomy
11
Stars: Binaries: Spectroscopic, Stars: Individual: Constellation Name: Im Pegasi
Scientific paper
We present the first detection of the secondary of the spectroscopic binary system IM Pegasi (HR 8703), the guide star for the NASA-Stanford relativity gyroscope mission Gravity Probe B. In support of this mission, high-resolution echelle spectra of IM Peg have been obtained on an almost nightly basis. Applying the technique of least-squares deconvolution, we achieve very high signal-to-noise ratio line profiles and detect the orbit of the secondary of the system. Combining almost 700 new radial velocity measurements of both the primary and secondary of the system with previous measurements, we derive improved orbital parameters of the IM Peg system. Using these estimates along with the previously determined range of orbital inclination angles for the system, we find that the primary of IM Peg is a giant of mass 1.8+/-0.2 Msolar, while the secondary is a dwarf of mass 1.0+/-0.1 Msolar.
Berdyugina Svetlana V.
Carter Brad D.
Donati Jean-Francois
Eaton Joel A.
Fischer Debra Ann
No associations
LandOfFree
A Sun in the Spectroscopic Binary IM Pegasi, the Guide Star for the Gravity Probe B Mission does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A Sun in the Spectroscopic Binary IM Pegasi, the Guide Star for the Gravity Probe B Mission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Sun in the Spectroscopic Binary IM Pegasi, the Guide Star for the Gravity Probe B Mission will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1031211