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Dynamical Masses of Low Mass Stars in the Taurus and Ophiuchus Star Forming Regions

hal.structure.identifierDepartment of Astrophysics [New York]
hal.structure.identifierStony Brook University [SUNY] [SBU]
dc.contributor.authorSIMON, M.
hal.structure.identifierAMOR 2017
dc.contributor.authorGUILLOTEAU, S.
hal.structure.identifierAMOR 2017
dc.contributor.authorDI FOLCO, E.
hal.structure.identifierAMOR 2017
dc.contributor.authorDUTREY, Anne
hal.structure.identifierObservatoire astronomique de Strasbourg [ObAS]
dc.contributor.authorGROSSO, N.
dc.contributor.authorPIÉTU, V.
hal.structure.identifierAMOR 2017
dc.contributor.authorCHAPILLON, E.
dc.contributor.authorPRATO, L.
hal.structure.identifierGeorgia State University
dc.contributor.authorSCHAEFER, G. H.
dc.contributor.authorRICE, E.
hal.structure.identifierCentro de Radioastronomia y Astrofisica [CRyA]
dc.contributor.authorBOEHLER, Y.
dc.date.issued2017-06
dc.identifier.issn0004-6361
dc.description.abstractEnWe report new dynamical masses for 5 pre-main sequence (PMS) stars in the L1495 region of the Taurus star-forming region (SFR) and 6 in the L1688 region of the Ophiuchus SFR. Since these regions have VLBA parallaxes these are absolute measurements of the stars' masses and are independent of their effective temperatures and luminosities. Seven of the stars have masses $<0.6$ solar masses, thus providing data in a mass range with little data, and of these, 6 are measured to precision $< 5 \%$. We find 8 stars with masses in the range 0.09 to 1.1 solar mass that agree well with the current generation of PMS evolutionary models. The ages of the stars we measured in the Taurus SFR are in the range 1-3 MY, and $<1$ MY for those in L1688. We also measured the dynamical masses of 14 stars in the ALMA archival data for Akeson~\&~Jensen's Cycle 0 project on binaries in the Taurus SFR. We find that the masses of 7 of the targets are so large that they cannot be reconciled with reported values of their luminosity and effective temperature. We suggest that these targets are themselves binaries or triples.
dc.language.isoen
dc.publisherEDP Sciences
dc.subject.enAstrophysics - Solar and Stellar Astrophysics
dc.title.enDynamical Masses of Low Mass Stars in the Taurus and Ophiuchus Star Forming Regions
dc.typeArticle de revue
dc.identifier.doi10.3847/1538-4357/aa78f1
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.identifier.arxiv1706.03505
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageThe Astrophysical Journal, Volume 844, Issue 2, article id. 158, 14 pp. (2017)
bordeaux.peerReviewedoui
hal.identifierhal-01538699
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01538699v1
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