Exploring The Frequency Of Close-In Jovian Planets Around M Dwarfs

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dc.creatorEndl, Michael
dc.creatorCochran, William D.
dc.creatorKuerster, Martin
dc.creatorPaulson, Diane B.
dc.creatorWittenmyer, Robert A.
dc.creatorMacQueen, Phillip J.
dc.creatorTull, Robert G.
dc.date2006-06-06
dc.date.accessioned2026-07-07T10:39:13Z
dc.date.available2026-07-07T10:39:13Z
dc.descriptionWe discuss our high precision radial velocity results of a sample of 90 M dwarfs observed with the Hobby-Eberly Telescope and the Harlan J. Smith 2.7 m Telescope at McDonald Observatory, as well as the ESO VLT and the Keck I telescopes, within the context of the overall frequency of Jupiter-mass planetary companions to main sequence stars. None of the stars in our sample show variability indicative of a giant planet in a short period orbit, with a < 1 AU. We estimate an upper limit of the frequency f of close-in Jovian planets around M dwarfs as < 1.27% (at the 1 sigma confidence level). Furthermore, we determine the efficiency of our survey to have noticed planets in circular orbits as 98% for companions with m sin i > 3.8 M_Jup and a < 0.7 AU. For eccentric orbits (e=0.6) the survey completeness is 95% for all planets with m sin i > 3.5 M_Jup and a < 0.7 AU. Our results point toward a generally lower frequency of close-in Jovian planets for M dwarfs as compared to FGK-type stars. This is an important piece of information for our understanding of the process of planet formation as a function of stellar mass.
dc.description20 pages (preprint), 5 figures, accepted in Astrophysical Journal
dc.identifierhttps://arxiv.org/abs/astro-ph/0606121
dc.identifierhttp://arxiv.org/abs/astro-ph/0606121
dc.identifierAstrophys.J.649:436-443,2006
dc.identifierdoi:10.1086/506465
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/180950
dc.subjectAstrophysics
dc.titleExploring The Frequency Of Close-In Jovian Planets Around M Dwarfs
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