Multiple Companions to HD 154857 and HD 160691

Simple item page
dc.creatorMcCarthy, Chris
dc.creatorButler, R. Paul
dc.creatorTinney, C. G.
dc.creatorJones, Hugh R. A.
dc.creatorMarcy, Geoffrey W.
dc.creatorCarter, Brad
dc.creatorPenny, Alan J.
dc.creatorFischer, Debra A.
dc.date2004-09-14
dc.date.accessioned2026-07-07T11:42:22Z
dc.date.available2026-07-07T11:42:22Z
dc.descriptionPrecise Doppler measurements from the AAT/UCLES spectrometer reveal two companions to both HD 154857 and HD 160691. The inner companion to HD 154857 has a period of 398 d, an eccentricity of 0.51, and a minimum mass of 1.8 M_Jupiter An outer companion has a period much longer than 2 years and is currently detected only as a linear trend of 14 m/s per year. The inner companion to HD 160691, previously announced from AAT data, has a period of 645 d, an eccentricity of 0.20, and a minimum mass of 1.7 M_Jupiter. For the outer planet, whose orbit is less well constrained, a two Keplerian fit yields a period of 8.2 yr, an eccentricity of 0.57, and a minimum mass of 3.1 M_Jupiter. With these orbital parameters, its maximum separation from the star of 0.4 arcsec makes it a viable target for direct imaging.
dc.description7 pages text, 5 Figures, 3 tables. Total size: 19 pages. Accepted for Dec 10 2004 ApJ. Also available at: http://tauceti.sfsu.edu/~chris/papers/
dc.identifierhttps://arxiv.org/abs/astro-ph/0409335
dc.identifierhttp://arxiv.org/abs/astro-ph/0409335
dc.identifierAstrophys.J.617:575-579,2004
dc.identifierdoi:10.1086/425214
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/200863
dc.subjectAstrophysics
dc.titleMultiple Companions to HD 154857 and HD 160691
dc.typetext

Files

Collections

arXiv