Marvels-1 : a face-on double-lined binary star masquerading as a resonant planetary system and consideration of rare false positives in radial velocity planet searches
dc.contributor.author | Wright, Jason Thomas | pt_BR |
dc.contributor.author | Roy, Arpita | pt_BR |
dc.contributor.author | Mahadevan, Suvrath | pt_BR |
dc.contributor.author | Wang, Sharon Xuesong | pt_BR |
dc.contributor.author | Ford, Eric B. | pt_BR |
dc.contributor.author | Payne, Matthew John | pt_BR |
dc.contributor.author | Lee, Brian L. | pt_BR |
dc.contributor.author | Wang, Ji | pt_BR |
dc.contributor.author | Crepp, Justin R. | pt_BR |
dc.contributor.author | Gaudi, B. S. | pt_BR |
dc.contributor.author | Eastman, Jason | pt_BR |
dc.contributor.author | Pepper, J. | pt_BR |
dc.contributor.author | Ge, Jian | pt_BR |
dc.contributor.author | Fleming, S.W. | pt_BR |
dc.contributor.author | Ghezzi, Luan | pt_BR |
dc.contributor.author | González Hernández, Jonay I. | pt_BR |
dc.contributor.author | Cargile, Phillip A. | pt_BR |
dc.contributor.author | Stassun, Keivan G. | pt_BR |
dc.contributor.author | Wisniewski, J.P. | pt_BR |
dc.contributor.author | Ferreira, Letícia D. | pt_BR |
dc.contributor.author | Mello, Gustavo Frederico Porto de | pt_BR |
dc.contributor.author | Maia, Marcio Antonio Geimba | pt_BR |
dc.contributor.author | Costa, Luiz N. da | pt_BR |
dc.contributor.author | Ogando, Ricardo L.C. | pt_BR |
dc.contributor.author | Santiago, Basilio Xavier | pt_BR |
dc.contributor.author | Schneider, D.P. | pt_BR |
dc.contributor.author | Hearty, Frederick R. | pt_BR |
dc.date.accessioned | 2015-01-20T02:15:27Z | pt_BR |
dc.date.issued | 2013 | pt_BR |
dc.identifier.issn | 0004-637X | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/109076 | pt_BR |
dc.description.abstract | We 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.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | The astrophysical journal. Bristol. Vol. 770, no. 2 (June 2013), 119, 21 p. | pt_BR |
dc.rights | Open Access | en |
dc.subject | Estrelas binarias | pt_BR |
dc.subject | Binaries: spectroscopic | en |
dc.subject | Brown dwarfs | en |
dc.subject | Anãs marrons | pt_BR |
dc.subject | Óptica adaptiva | pt_BR |
dc.subject | Stars: individual (TYC 1240-945-1) | en |
dc.subject | Stars: low-mass | en |
dc.subject | Movimento estelar | pt_BR |
dc.subject | Fotometria estelar | pt_BR |
dc.subject | Espectros estelares | pt_BR |
dc.title | Marvels-1 : a face-on double-lined binary star masquerading as a resonant planetary system and consideration of rare false positives in radial velocity planet searches | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000900643 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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