Echography of young stars reveals their evolution
| Autor: | Jaymie M. Matthews, Slavek M. Rucinski, Luca Fossati, A. F. J. Moffat, S. Pollack-Drs, Dimitar Sasselov, Konstanze Zwintz, T. A. Ryabchikova, Werner W. Weiss, A. Baglin, N. Themeßl, Ehsan Moravveji, M. Rainer, David B. Guenther, Conny Aerts, E. Poretti, D. Lorenz, Thomas G. Barnes, C. Cameron, Rainer Kuschnig |
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| Přispěvatelé: | Universität Insbruck, Space Research Institute of Austrian Academy of Sciences (IWF), Austrian Academy of Sciences (OeAW), Institute of Astronomy of the Russian Academy of Sciences (INASAN), Russian Academy of Sciences [Moscow] (RAS), Centre Hospitalier Universitaire de Nîmes (CHU Nîmes), Institut für Astrophysik [Wien], Universität Wien, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), School of engineering sciences, University of Southampton, INAF - Osservatorio Astronomico di Brera (OAB), Istituto Nazionale di Astrofisica (INAF), Department of Physics and Astronomy [Toronto], York University [Toronto] |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Physics
[PHYS]Physics [physics] Multidisciplinary Astronomy Molecular cloud FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Star (graph theory) Asteroseismology Accretion (astrophysics) Luminosity Stars Astrophysics - Solar and Stellar Astrophysics Homogeneous Gravitational collapse ComputingMethodologies_DOCUMENTANDTEXTPROCESSING Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Solar and Stellar Astrophysics (astro-ph.SR) Astrophysics::Galaxy Astrophysics ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Science Science, American Association for the Advancement of Science, 2014, 345 (6196), pp.550-553. ⟨10.1126/science.1253645⟩ Science, 2014, 345 (6196), pp.550-553. ⟨10.1126/science.1253645⟩ Science, 345, 6196, pp. 550-553 Science, 345, 550-553 |
| ISSN: | 0036-8075 1095-9203 |
| DOI: | 10.1126/science.1253645⟩ |
| Popis: | We demonstrate that a seismic analysis of stars in their earliest evolutionary phases is a powerful method to identify young stars and distinguish their evolutionary states. The early star that is born from the gravitational collapse of a molecular cloud reaches at some point sufficient temperature, mass and luminosity to be detected. Accretion stops and the pre-main sequence star that emerges is nearly fully convective and chemically homogeneous. It will continue to contract gravitationally until the density and temperature in the core are high enough to start nuclear burning of hydrogen. We show that there is a relationship between detected pulsation properties for a sample of young stars and their evolutionary status illustrating the potential of asteroseismology for the early evolutionary phases. 23 pages, 9 figures, includes Supplementary Material. Science, published in Science Express on July 3, 2014 |
| Databáze: | OpenAIRE |
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