The sudden appearance of CO emission in LHA 115-S 65

dc.creatorOksala, M. E.
dc.creatorKraus, M.
dc.creatorArias, María Laura
dc.creatorBorges Fernandes, M.
dc.creatorCidale, Lydia Sonia
dc.creatorMuratore, María Florencia
dc.creatorCuré, M.
dc.date2012-10-01
dc.date2019-11-01T14:02:58Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/84628
dc.identifierissn:1745-3925
dc.descriptionMolecular emission has been detected in several Magellanic Cloud B[e] supergiants. In this Letter, we report on the detection of CO band head emission in the B[e] supergiant LHA 115-S 65, and present a K-band near-infrared spectrum obtained with the Spectrograph for INtegral Field Observation in the Near-Infrared (SINFONI; R = 4500) on the ESO VLT UT4 telescope. The observed molecular band head emission in S65 is quite surprising in the light of a previous non-detection by McGregor, Hyland & McGinn, as well as a high-resolution (R = 50 000) Gemini/Phoenix spectrum of this star taken nine months earlier showing no emission. Based on analysis of the optical spectrum by Kraus, Borges Fernandes & de Aráujo, we suspect that the sudden appearance of molecular emission could be due to density buildup in an outflowing viscous disc, as seen for Be stars. This new discovery, combined with variability in two other similar evolved massive stars, indicates an evolutionary link between B[e] supergiants and luminous blue variables.
dc.descriptionFacultad de Ciencias Astronómicas y Geofísicas
dc.formatapplication/pdf
dc.formatL56-L60
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.rightsCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.subjectCiencias Astronómicas
dc.subjectBe
dc.subjectCircumstellar matter
dc.subjectOutflows
dc.subjectStars: emission-line
dc.subjectStars: individual: LHA115-S 65
dc.subjectStars: winds
dc.subjectSupergiants
dc.titleThe sudden appearance of CO emission in LHA 115-S 65
dc.typeArticulo
dc.typeArticulo


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