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dc.contributor.author
Maíz Apellániz, J.
dc.contributor.author
Negueruela, I.
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Barbá, R. H.
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Walborn, N. R.
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Pellerin, A.
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Simón Díaz, S.
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Sota, A.
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Marco, A.
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Alonso Santiago, J.
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Sanchez Bermudez, J.
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Gamen, Roberto Claudio
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dc.contributor.author
Lorenzo, J.
dc.date.available
2017-02-09T15:25:48Z
dc.date.issued
2015-07
dc.identifier.citation
Maíz Apellániz, J. ; Negueruela, I.; Barbá, R. H. ; Walborn, N. R.; Pellerin, A.; et al.; The little-studied cluster Berkeley 90. I. LS III +46 11: a very massive O3.5 If* + O3.5 If* binary; Edp Sciences; Astronomy And Astrophysics; 579; 7-2015; 108-120
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/12789
dc.description.abstract
Context. It appears that most (if not all) massive stars are born in multiple systems. At the same time, the most massive binaries are hard to find owing to their low numbers throughout the Galaxy and the implied large distances and extinctions.
Aims. We want to study LS III +46 11, identified in this paper as a very massive binary; another nearby massive system, LS III +46 12; and the surrounding stellar cluster, Berkeley 90.
Methods. Most of the data used in this paper are multi-epoch high S/N optical spectra, although we also use Lucky Imaging and archival photometry. The spectra are reduced with dedicated pipelines and processed with our own software, such as a spectroscopicorbit code, CHORIZOS, and MGB.
Results. LS III +46 11 is identified as a new very early O-type spectroscopic binary [O3.5 If* + O3.5 If*] and LS III +46 12 as another early O-type system [O4.5 V((f))]. We measure a 97.2-day period for LS III +46 11 and derive minimum masses of 38.80 ± 0.83 M and 35.60 ± 0.77 M for its two stars. We measure the extinction to both stars, estimate the distance, search for optical companions, and study the surrounding cluster. In doing so, a variable extinction is found as well as discrepant results for the distance. We discuss possible explanations and suggest that LS III +46 12 may be a hidden binary system where the companion is currently undetected.
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
Spectroscopic Binaries
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Extinction
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Interstellar Medium
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Early Type Stars
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Ls Iii +46 11 (Estrella)
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Open Clusters
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Aassociations
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Berkeley 90
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Astronomía
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Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
The little-studied cluster Berkeley 90. I. LS III +46 11: a very massive O3.5 If* + O3.5 If* binary
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-01-11T13:26:15Z
dc.journal.volume
579
dc.journal.pagination
108-120
dc.journal.pais
Francia
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dc.journal.ciudad
Paris
dc.description.fil
Fil: Maíz Apellániz, J. . Centro de Astrobiología (CSIC-INTA); España
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Fil: Negueruela, I.. Universidad de Alicante; España
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Fil: Barbá, R. H. . Universidad de la Serena; Chile
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Fil: Walborn, N. R.. Space Telescope Science Institute; Estados Unidos
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Fil: Pellerin, A.. State University Of New York; Estados Unidos
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Fil: Simón Díaz, S.. Instituto de Astrofísica de Canarias; España. Universidad de la Laguna; España
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Fil: Sota, A.. Consejo Superior de Investigaciones Cientificas. Instituto de Astrofísica de Andalucía; España
dc.description.fil
Fil: Marco, A.. Universidad de Alicante; España
dc.description.fil
Fil: Alonso Santiago, J.. Universidad de Alicante; España
dc.description.fil
Fil: Sanchez Bermudez, J.. Consejo Superior de Investigaciones Cientificas. Instituto de Astrofísica de Andalucía; España
dc.description.fil
Fil: Gamen, Roberto Claudio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; Argentina. Universidad Nacional de La Plata; Argentina
dc.description.fil
Fil: Lorenzo, J.. Universidad de Alicante; España
dc.journal.title
Astronomy And Astrophysics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/201526123
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.aanda.org/articles/aa/abs/2015/07/aa26123-15/aa26123-15.html
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