Show simple item record

dc.contributor.author Muratore, M. F.
dc.contributor.author Kraus, M.
dc.contributor.author Oksala, M. E.
dc.contributor.author Arias, María Laura
dc.contributor.author Cidale, Lydia Sonia
dc.contributor.author Borges Fernandes, M.
dc.contributor.author Liermann, A.
dc.date.available 2017-03-21T18:30:54Z
dc.date.issued 2015-01
dc.identifier.citation Muratore, M. F.; Kraus, M.; Oksala, M. E.; Arias, María Laura; Cidale, Lydia Sonia; et al.; Evidence of the evolved nature of the B[e] star MWC 137; Iop Publishing; Astronomical Journal; 149; 1; 1-2015; 1-9
dc.identifier.issn 0004-6256
dc.identifier.uri http://hdl.handle.net/11336/14129
dc.description.abstract The evolutionary phase of B[e] stars is difficult to establish due to the un certainties in their fundamental parameters. For instance, possible classications for the Galactic B[e] starMWC 137 include pre- main-sequence and post-main-sequence phases, with a large range in luminosity. Our goal is to clarify the evolutionary stage of this peculiar object, and to study the CO molecular component of its circumstellar medium. To this purpose, we modeled the CO molecular bands using high-resolution K-band spectra. We nd that MWC137 is surrounded by a detached cool (T = 1900100 K) and dense (N = (31)1021 cm2) ring of CO gas orbiting the star with a rotational velocity, projected to the line of sight, of 84 2 kms1. We also nd that the molec- ular gas is enriched in the isotope 13C, excluding the classication of the star as a Herbig Be. The observed isotopic abundance ratio (12C=13C = 25 2) derived from our modeling is compatible with a proto-PN, main-sequence or supergiant evolutionary phase. However, based on some observable characteristics of MWC137, we propose that the supergiant scenario seems to be the most plausible. Hence, we suggest that MWC137 could be in an extremely short-lived phase, evolving from a B[e] supergiant to a blue supergiant with a bipolar ring nebula.
dc.format application/pdf
dc.language.iso eng
dc.publisher Iop Publishing
dc.rights info:eu-repo/semantics/openAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject Circumstellar matter
dc.subject Early type stars
dc.subject Emission lines
dc.subject MWC 137 (estrella)
dc.subject Be stars
dc.subject.classification Astronomía
dc.subject.classification Ciencias Físicas
dc.subject.classification CIENCIAS NATURALES Y EXACTAS
dc.title Evidence of the evolved nature of the B[e] star MWC 137
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion
dc.date.updated 2017-03-06T18:07:57Z
dc.journal.volume 149
dc.journal.number 1
dc.journal.pagination 1-9
dc.journal.pais Estados Unidos
dc.journal.ciudad Londres
dc.description.fil Fil: Muratore, M. F.. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; Argentina
dc.description.fil Fil: Kraus, M.. Astronomický ústav; República Checa
dc.description.fil Fil: Oksala, M. E.. Astronomický ústav; República Checa
dc.description.fil Fil: Arias, María Laura. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; Argentina
dc.description.fil Fil: Cidale, Lydia Sonia. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; Argentina
dc.description.fil Fil: Borges Fernandes, M.. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil
dc.description.fil Fil: Liermann, A.. Leibniz-Institut für Astrophysik Potsdam; Alemania
dc.journal.title Astronomical Journal
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-6256/149/1/13
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1088/0004-6256/149/1/13


Archivos asociados

This item appears in the following Collection(s)

Show simple item record

info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)