CP2 stars as viewed by the uvby Hbeta system

A new statistical parallax method using the Maximum Likelihood principle is presented, allowing the simultaneous determination of a luminosity calibration, kinematic characteristics and spatial distribution of a given sample. This method has been developed for the exploitation of the Hipparcos data...

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Detalles Bibliográficos
Autores: Masana Fresno, Eduard, Jordi i Nebot, Carme, Maitzen, H. M (Hans Michael), 1943-, Torra Roca, Jorge
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:1998
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/9206
Acceso en línea:https://hdl.handle.net/2445/9206
Access Level:acceso abierto
Palabra clave:Estels
Fotometria astronòmica
Stars: chemically peculiar
Stars: fundamental parameters
Stars: early type
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spelling CP2 stars as viewed by the uvby Hbeta systemMasana Fresno, EduardJordi i Nebot, CarmeMaitzen, H. M (Hans Michael), 1943-Torra Roca, JorgeEstelsFotometria astronòmicaStars: chemically peculiarStars: fundamental parametersStars: early typeA new statistical parallax method using the Maximum Likelihood principle is presented, allowing the simultaneous determination of a luminosity calibration, kinematic characteristics and spatial distribution of a given sample. This method has been developed for the exploitation of the Hipparcos data and presents several improvements with respect to the previous ones: the effects of the selection of the sample, the observational errors, the galactic rotation and the interstellar absorption are taken into account as an intrinsic part of the formulation (as opposed to external corrections). Furthermore, the method is able to identify and characterize physically distinct groups in inhomogeneous samples, thus avoiding biases due to unidentified components. Moreover, the implementation used by the authors is based on the extensive use of numerical methods, so avoiding the need for simplification of the equations and thus the bias they could introduce. Several examples of application using simulated samples are presented, to be followed by applications to real samples in forthcoming articles.EDP Sciences1998info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/9206Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a http://dx.doi.org/10.1051/aas:1998140Astronomy and Astrophysics Supplement Series, 1998, vol. 128, núm. 1, p. 265-275.http://dx.doi.org/10.1051/aas:1998140(c) The European Southern Observatory, 1998info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/92062026-05-27T06:46:51Z
dc.title.none.fl_str_mv CP2 stars as viewed by the uvby Hbeta system
title CP2 stars as viewed by the uvby Hbeta system
spellingShingle CP2 stars as viewed by the uvby Hbeta system
Masana Fresno, Eduard
Estels
Fotometria astronòmica
Stars: chemically peculiar
Stars: fundamental parameters
Stars: early type
title_short CP2 stars as viewed by the uvby Hbeta system
title_full CP2 stars as viewed by the uvby Hbeta system
title_fullStr CP2 stars as viewed by the uvby Hbeta system
title_full_unstemmed CP2 stars as viewed by the uvby Hbeta system
title_sort CP2 stars as viewed by the uvby Hbeta system
dc.creator.none.fl_str_mv Masana Fresno, Eduard
Jordi i Nebot, Carme
Maitzen, H. M (Hans Michael), 1943-
Torra Roca, Jorge
author Masana Fresno, Eduard
author_facet Masana Fresno, Eduard
Jordi i Nebot, Carme
Maitzen, H. M (Hans Michael), 1943-
Torra Roca, Jorge
author_role author
author2 Jordi i Nebot, Carme
Maitzen, H. M (Hans Michael), 1943-
Torra Roca, Jorge
author2_role author
author
author
dc.subject.none.fl_str_mv Estels
Fotometria astronòmica
Stars: chemically peculiar
Stars: fundamental parameters
Stars: early type
topic Estels
Fotometria astronòmica
Stars: chemically peculiar
Stars: fundamental parameters
Stars: early type
description A new statistical parallax method using the Maximum Likelihood principle is presented, allowing the simultaneous determination of a luminosity calibration, kinematic characteristics and spatial distribution of a given sample. This method has been developed for the exploitation of the Hipparcos data and presents several improvements with respect to the previous ones: the effects of the selection of the sample, the observational errors, the galactic rotation and the interstellar absorption are taken into account as an intrinsic part of the formulation (as opposed to external corrections). Furthermore, the method is able to identify and characterize physically distinct groups in inhomogeneous samples, thus avoiding biases due to unidentified components. Moreover, the implementation used by the authors is based on the extensive use of numerical methods, so avoiding the need for simplification of the equations and thus the bias they could introduce. Several examples of application using simulated samples are presented, to be followed by applications to real samples in forthcoming articles.
publishDate 1998
dc.date.none.fl_str_mv 1998
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/9206
url https://hdl.handle.net/2445/9206
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a http://dx.doi.org/10.1051/aas:1998140
Astronomy and Astrophysics Supplement Series, 1998, vol. 128, núm. 1, p. 265-275.
http://dx.doi.org/10.1051/aas:1998140
dc.rights.none.fl_str_mv (c) The European Southern Observatory, 1998
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The European Southern Observatory, 1998
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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