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dc.date.accessioned | 2019-10-11T14:40:44Z | |
dc.date.available | 2019-10-11T14:40:44Z | |
dc.date.issued | 2007 | |
dc.identifier.uri | http://sedici.unlp.edu.ar/handle/10915/83151 | |
dc.description.abstract | Aims. Stars in the narrow mass range of about 2.5 and 3.5 M ⊙ can develop a thermally unstable He-burning shell during its ignition phase. We study, from the point of view secular stability theory, these so-called thermal micropulses and investigate their properties; the thermal pulses constitute a convenient conceptual laboratory to look thoroughly into the physical properties of a helium-burning shell during the whole thermally pulsing episode. Methods. Linear stability analyses were performed on a large number of 3 M⊙ star models toward the end of their core helium-burning and the beginning of the double shell burning phase. The stellar models were not assumed to be in thermal equilibrium. Results. The thermal mircopulses - and we conjecture all other thermal pulse episodes encountered by shell burning stars - can be understood as the nonlinear finite-amplitude realization of an oscillatory secular instability that prevails during the whole thermal pulsing episode. Hence, the cyclic nature of the thermal pulses can be traced back to a linear instability concept. | en |
dc.format.extent | 911-923 | es |
dc.language | en | es |
dc.subject | Stars: AGB and post-AGB | es |
dc.subject | Stars: interiors | es |
dc.subject | Stars: oscillations | es |
dc.title | Oscillatory secular modes: The thermal micropulses | en |
dc.type | Articulo | es |
sedici.identifier.other | doi:10.1051/0004-6361:20065739 | es |
sedici.identifier.other | eid:2-s2.0-34548057344 | es |
sedici.identifier.issn | 0004-6361 | es |
sedici.creator.person | Gautschy, A. | es |
sedici.creator.person | Althaus, Leandro Gabriel | es |
sedici.subject.materias | Ciencias Astronómicas | es |
sedici.description.fulltext | true | es |
mods.originInfo.place | Instituto de Astrofísica de La Plata | es |
mods.originInfo.place | Facultad de Ciencias Astronómicas y Geofísicas | es |
sedici.subtype | Articulo | es |
sedici.rights.license | Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) | |
sedici.rights.uri | http://creativecommons.org/licenses/by-nc-sa/4.0/ | |
sedici.description.peerReview | peer-review | es |
sedici.relation.journalTitle | Astronomy and Astrophysics | es |
sedici.relation.journalVolumeAndIssue | vol. 471, no. 3 | es |