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A Keck/HIRES Doppler Search for Planets Orbiting Metal-Poor Dwarfs | | A. Sozzetti
; D. W. Latham
; G. Torres
; R. P. Stefanik
; A. P. Boss
; B. W. Carney
; J. B. Laird
; | | Date: |
11 Nov 2004 | | Subject: | astro-ph | | Affiliation: | 1,2), D. W. Latham , G. Torres , R. P. Stefanik , A. P. Boss , B. W. Carney , and J. B. Laird ( University of Pittsburgh; Harvard-Smithsonian Center for Astrophysics; Carnegie Institution of Washington; University of North Carolina; Bowling Green | | Abstract: | We present results from our ongoing spectroscopic search for giant planets within 1 AU around a well-defined sample of metal-poor stars with HIRES on the Keck 1 telescope. We have achieved an rms radial velocity precision of $sim 8$ m/s over a time-span of 1.5 years. The data collected so far build toward evidence of the absence of very short-period ($< 1$ month) giant planets. However, about 7% of the stars in our sample exhibits velocity trends indicative of the existence of companions. We place preliminary upper limits on the detectable companion mass as a function of orbital period, and compare them with the performance of ESA’s future space-borne high-precision astrometric observatory Gaia. | | Source: | arXiv, astro-ph/0411285 | | Services: | Forum | Review | PDF | Favorites | |
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