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dc.contributor.author
Rodriguez Ledesma, María V.
dc.contributor.author
Mundt, Reinhard
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Pintado, Olga Ines
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dc.contributor.author
Boudreault, Steve
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Hessman, Frederic
dc.contributor.author
Herbst, William
dc.date.available
2017-10-10T17:10:42Z
dc.date.issued
2013-02
dc.identifier.citation
Rodriguez Ledesma, María V.; Mundt, Reinhard; Pintado, Olga Ines; Boudreault, Steve; Hessman, Frederic; et al.; The spectral type of CHS 7797 - an intriguing very low mass periodic variable in the Orion Nebula Cluster; EDP Sciences; Astronomy and Astrophysics; 551; 2-2013; 1-6; A44
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/26366
dc.description.abstract
Aims: We present the spectroscopic characterization of the unusual high-amplitude very low mass pre-main-sequence periodic variable CHS 7797. Methods: This study is based on optical medium-resolution (R = 2200) spectroscopy in the 6450 − 8600 Å range, carried out with GMOS-GEMINI -S in March 2011. Observations of CHS 7797 have been carried out at two distinct phases of the 17.8 d period, namely at maximum (I ≈ 17.4 mag) and four days before maximum (I ≈ 18.5 mag). Four different spectral indices were used for the spectral classification at these two phases, all of them well-suited for spectral classification of young and obscured late M dwarfs. In addition, the gravity-sensitive Na I (8183/8195 Å) and K I (7665/7699 Å) doublet lines were used to confirm the young age of CHS 7797. Results: From the spectrum obtained at maximum light we derived a spectral type (SpT) of M 6.05 ± 0.25, while for the spectrum taken four days before maximum the derived SpT is M 5.75 ± 0.25. The derived SpTs confirm that CHS 7797 has a mass in the stellar-substellar boundary mass range. In addition, the small differences in the derived SpTs at the two observed phases may provide indirect hints that CHS 7797 is a binary system of similar mass components surrounded by a tilted circumbinary disk, a system similar to KH 15D.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
EDP Sciences
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Stars: Low-Mass
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Pre Main Sequence Stars
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Brown Dwarfs
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Stars: Variable, Binary
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Spectroscopy
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Otras Ciencias Físicas
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dc.subject.classification
Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
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dc.title
The spectral type of CHS 7797 - an intriguing very low mass periodic variable in the Orion Nebula Cluster
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-08-07T17:38:10Z
dc.journal.volume
551
dc.journal.pagination
1-6; A44
dc.journal.pais
Francia
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dc.description.fil
Fil: Rodriguez Ledesma, María V.. Max-Planck-Institut fur Astronomie; Alemania. Georg-August-Universität; Alemania
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Fil: Mundt, Reinhard. Max-Planck-Institut fur Astronomie; Alemania
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Fil: Pintado, Olga Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina
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Fil: Boudreault, Steve. Instituto de Astrof´ısica de Canarias; España. Universidad de la Laguna; España
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Fil: Hessman, Frederic. Georg-August-Universität; Alemania
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Fil: Herbst, William. Wesleyan University; Estados Unidos
dc.journal.title
Astronomy and Astrophysics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/201219748
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2013/03/aa19748-12/aa19748-12.html
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