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25 April 2024 |
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A Long-Period Jupiter-Mass Planet Orbiting the Nearby M Dwarf GJ849 | | R. Paul Butler
; John A. Johnson
; Geoffrey W. Marcy
; Jason T. Wright
; Steven S. Vogt
; Debra A. Fischer
; | | Date: |
6 Oct 2006 | | Abstract: | We report precise Doppler measurements of GJ849 (M3.5V) that reveal the presence of a planet with a minimum mass of 0.82 Mjup in a 5.16 year orbit. At a = 2.35 AU, GJ849b is the first planet discovered around an M dwarf to orbit beyond 0.21 AU, and is only the second Jupiter mass planet discovered around a star less massive than 0.5 Msun. This detection brings to 4 the number of M stars known to harbor planets. Based on the results of our survey of 1300 FGKM main--sequence stars we find that giant planets within 2.5 AU are ~3 times more common around GK stars than around M stars. Due to the GJ849’s proximity of 8.8 pc, the planet’s angular separation is 0."27, making this system a prime target for high--resolution imaging using adaptive optics and future space--borne missions such as the Space Interferometry Mission. We also find evidence of a linear trend in the velocity time series, which may be indicative of an additional planetary companion. | | Source: | arXiv, astro-ph/0610179 | | Services: | Forum | Review | PDF | Favorites | |
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