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dc.contributor.authorWright, Jason Thomaspt_BR
dc.contributor.authorRoy, Arpitapt_BR
dc.contributor.authorMahadevan, Suvrathpt_BR
dc.contributor.authorWang, Sharon Xuesongpt_BR
dc.contributor.authorFord, Eric B.pt_BR
dc.contributor.authorPayne, Matthew Johnpt_BR
dc.contributor.authorLee, Brian L.pt_BR
dc.contributor.authorWang, Jipt_BR
dc.contributor.authorCrepp, Justin R.pt_BR
dc.contributor.authorGaudi, B. S.pt_BR
dc.contributor.authorEastman, Jasonpt_BR
dc.contributor.authorPepper, J.pt_BR
dc.contributor.authorGe, Jianpt_BR
dc.contributor.authorFleming, S.W.pt_BR
dc.contributor.authorGhezzi, Luanpt_BR
dc.contributor.authorGonzález Hernández, Jonay I.pt_BR
dc.contributor.authorCargile, Phillip A.pt_BR
dc.contributor.authorStassun, Keivan G.pt_BR
dc.contributor.authorWisniewski, J.P.pt_BR
dc.contributor.authorFerreira, Letícia D.pt_BR
dc.contributor.authorMello, Gustavo Frederico Porto dept_BR
dc.contributor.authorMaia, Marcio Antonio Geimbapt_BR
dc.contributor.authorCosta, Luiz N. dapt_BR
dc.contributor.authorOgando, Ricardo L.C.pt_BR
dc.contributor.authorSantiago, Basilio Xavierpt_BR
dc.contributor.authorSchneider, D.P.pt_BR
dc.contributor.authorHearty, Frederick R.pt_BR
dc.date.accessioned2015-01-20T02:15:27Zpt_BR
dc.date.issued2013pt_BR
dc.identifier.issn0004-637Xpt_BR
dc.identifier.urihttp://hdl.handle.net/10183/109076pt_BR
dc.description.abstractWe have analyzed new and previously published radial velocity (RV) observations of MARVELS-1, known to have an ostensibly substellar companion in a ∼6 day orbit. We find significant (∼100ms-ˡ) residuals to the best-fit model for the companion, and these residuals are naïvely consistent with an interior giant planet with a P = 1.965 days in a nearly perfect 3:1 period commensurability (|Pb/Pc − 3| < 10 −4). We have performed several tests for the reality of such a companion, including a dynamical analysis, a search for photometric variability, and a hunt for contaminating stellar spectra. We find many reasons to be critical of a planetary interpretation, including the fact that most of the three-body dynamical solutions are unstable. We find no evidence for transits, and no evidence of stellar photometric variability. We have discovered two apparent companions to MARVELS-1 with adaptive optics imaging at Keck; both are M dwarfs, one is likely bound, and the other is likely a foreground object. We explore false-alarm scenarios inspired by various curiosities in the data. Ultimately, a line profile and bisector analysis lead us to conclude that the ∼100 m s-ˡ residuals are an artifact of spectral contamination from a stellar companion contributing ∼15%–30% of the optical light in the system. We conclude that origin of this contamination is the previously detected RV companion to MARVELS-1, which is not, as previously reported, a brown dwarf, but in fact a G dwarf in a face-on orbit.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofThe astrophysical journal. Bristol. Vol. 770, no. 2 (June 2013), 119, 21 p.pt_BR
dc.rightsOpen Accessen
dc.subjectBinaries: spectroscopicen
dc.subjectEstrelas binariaspt_BR
dc.subjectAnãs marronspt_BR
dc.subjectBrown dwarfsen
dc.subjectStars: individual (TYC 1240-945-1)en
dc.subjectÓptica adaptivapt_BR
dc.subjectMovimento estelarpt_BR
dc.subjectStars: low-massen
dc.subjectFotometria estelarpt_BR
dc.subjectEspectros estelarespt_BR
dc.titleMarvels-1 : a face-on double-lined binary star masquerading as a resonant planetary system and consideration of rare false positives in radial velocity planet searchespt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000900643pt_BR
dc.type.originEstrangeiropt_BR


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