A Long-Period Jupiter-Mass Planet Orbiting the Nearby M Dwarf GJ849
Oct, 2006
12 pages
Published in:
- Publ.Astron.Soc.Pac. 118 (2006) 1685
e-Print:
- astro-ph/0610179 [astro-ph]
DOI:
View in:
Citations per year
Abstract: (arXiv)
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 Doppler-detected 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.- TECHNIQUES RADIAL VELOCITIES
- PLANETARY SYSTEM FORMATION
References(26)
Figures(0)