Masses and Implications for Ages of Low-Mass Pre-Main Sequence Stars in Taurus and Ophiuchus
| hal.structure.identifier | Departement of Physics and Astronomy [SUNY] | |
| hal.structure.identifier | Departement of Astrophysics, American Museum of Natural History, NY | |
| dc.contributor.author | SIMON, Michal | |
| hal.structure.identifier | AMOR 2019 | |
| dc.contributor.author | GUILLOTEAU, S. | |
| dc.contributor.author | BECK, Tracy L. | |
| hal.structure.identifier | AMOR 2019 | |
| dc.contributor.author | CHAPILLON, E. | |
| hal.structure.identifier | AMOR 2019 | |
| dc.contributor.author | DUTREY, Anne | |
| hal.structure.identifier | AMOR 2019 | |
| dc.contributor.author | DI FOLCO, E. | |
| dc.contributor.author | FEIDEN, Gregory A. | |
| hal.structure.identifier | Laboratoire d'Astrophysique de Marseille [LAM] | |
| dc.contributor.author | GROSSO, N. | |
| dc.contributor.author | PRATO, L. | |
| dc.contributor.author | SCHAEFER, Gail. H. | |
| dc.date.issued | 2019 | |
| dc.identifier.issn | 0004-637X | |
| dc.description.abstractEn | The accuracy of masses of pre-main sequence (PMS) stars derived from their locations on the Hertzsprung-Russell Diagram (HRD) can be tested by comparison with accurate and precise masses determined independently. We present 29 single stars in the Taurus star-forming region (SFR) and 3 in the Ophiuchus SFR with masses measured dynamically to a precision of at least $10 \%$. Our results include 9 updated mass determinations and 3 that have not had their dynamical masses published before. This list of stars with fundamental, dynamical masses, M$_{dyn}$, is drawn from a larger list of 39 targets in the Taurus SFR and 6 in the Ophiuchus SFR. Placing the stars with accurate and precise dynamical masses on HRDs that do not include internal magnetic fields underestimates the mass compared to M$_{dyn}$ by about $30 \%$. Placing them on an HRD that does include magnetic fields yields mass estimates in much better agreement with M$_{dyn}$, with an average difference between M$_{dyn}$ and the estimated track mass of $0.01\pm0.02$~\msun. The ages of the stars, 3--10 MY on tracks that include magnetic fields, is older than the 1--3 MY indicated by the non-magnetic models. The older ages of T Tauri stars predicted by the magnetic models increase the time available for evolution of their disks and formation of the giant gas exoplanets. The agreement between our M$_{dyn}$ values and the masses on the magnetic field tracks provides indirect support for these older ages. | |
| dc.language.iso | en | |
| dc.publisher | American Astronomical Society | |
| dc.subject.en | Astrophysics - Solar and Stellar Astrophysics | |
| dc.subject.en | Astrophysics - Astrophysics of Galaxies | |
| dc.title.en | Masses and Implications for Ages of Low-Mass Pre-Main Sequence Stars in Taurus and Ophiuchus | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.3847/1538-4357/ab3e3b | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO] | |
| dc.identifier.arxiv | 1908.10952 | |
| bordeaux.journal | The Astrophysical Journal | |
| bordeaux.page | id. 42 | |
| bordeaux.volume | 884 | |
| bordeaux.issue | 1 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-02282440 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-02282440v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The%20Astrophysical%20Journal&rft.date=2019&rft.volume=884&rft.issue=1&rft.spage=id.%2042&rft.epage=id.%2042&rft.eissn=0004-637X&rft.issn=0004-637X&rft.au=SIMON,%20Michal&GUILLOTEAU,%20S.&BECK,%20Tracy%20L.&CHAPILLON,%20E.&DUTREY,%20Anne&rft.genre=article |
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