Other
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...193.9703m&link_type=abstract
American Astronomical Society, 193rd AAS Meeting, #97.03; Bulletin of the American Astronomical Society, Vol. 30, p.1391
Other
1
Scientific paper
Doppler surveys of main sequence stars have revealed 14 companions that are strong extrasolar planet candidates, as characterized by Msini < 5 Mjup. A plausible distinction between planets and more massive substellar companions appears in their mass distribution. Companions having Msini in the range 0.5--5 Mjup outnumber those between 5--50 Mjup by a factor of ~ 3, within 2 AU. The planets that orbit farther than 0.15 AU from their star all reside in non--circular orbits having e>0.05, i.e., more eccentric than Jupiter's orbit. Indeed, all but two of these planets have e>0.2 . This high occurrence of orbital eccentricity has lead to models in which Jupiter--like planets suffer gravitational interactions with a) other planets (Weidenschilling & Marzari 1996, Rasio & Ford 1996, Lin & Ida 1996, Levison et al. 1998), b) the disk (Artymowicz 1993) c) a companion star (Holman et al. 1996, Mazeh et al. 1996). In addition, almost all of the planets discovered to date orbit metal-rich stars, with [Fe/H]>0.0. We report two new planet candidates around two G--type main--seqeunce stars, HD210277 and HD168443. The values of Msini are 1.17 and 4.96 Mjup, respecitively, and the orbital periods are 437 d and 58 d. Both orbits have large eccentricities, e=0.45 and e=0.54, respectively, and both stars are single. Thus, the orbital eccentricities stem from internal dynamics that involve other planets or the protoplanetary disk. The velocities for HD168443 are not adequately fit with a model that includes only one planetary companion.
Butler Paul R.
Fischer Debra Ann
Marcy Geo? W.
Vogt Stefan
No associations
LandOfFree
Extrasolar Planets: Masses and Orbits 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 Extrasolar Planets: Masses and Orbits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extrasolar Planets: Masses and Orbits will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-997337