Building reliable models of M dwarf chromospheres: The spectral diagnostics

As part of an ongoing project to study how reliable are the chromospheric models constructed semi-empirically to fit the chromospheric spectrum of cold stars, in this paper we study how changes in the assumed chromospheric structure of dM and dMe stars affect the emitted spectrum. In this way, we st...

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Autor principal: Mauas, P.J.D.
Formato: JOUR
Materias:
Stars: atmospheres
Stars: chromospheres
Stars: late-type
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0004637X_v539_n2PART1_p858_Mauas
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_0004637X_v539_n2PART1_p858_Mauas
record_format dspace
spelling todo:paper_0004637X_v539_n2PART1_p858_Mauas2023-10-03T14:01:47Z Building reliable models of M dwarf chromospheres: The spectral diagnostics Mauas, P.J.D. Stars: atmospheres Stars: chromospheres Stars: late-type As part of an ongoing project to study how reliable are the chromospheric models constructed semi-empirically to fit the chromospheric spectrum of cold stars, in this paper we study how changes in the assumed chromospheric structure of dM and dMe stars affect the emitted spectrum. In this way, we study if a given set of features can wholly determine the atmospheric structure, how large are the indeterminations in the atmospheric parameters deduced, and to what extent the atmospheric model computed can be considered unique. We find that the profiles of the Ca II K line or the Na D lines can be used to determine the structure of the Tmin region and that the Ha profile can provide good information on the structure of the chromosphere. The Lyα flux, in turn, can be used to constrain the position of the transition region. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0004637X_v539_n2PART1_p858_Mauas
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Stars: atmospheres
Stars: chromospheres
Stars: late-type
spellingShingle Stars: atmospheres
Stars: chromospheres
Stars: late-type
Mauas, P.J.D.
Building reliable models of M dwarf chromospheres: The spectral diagnostics
topic_facet Stars: atmospheres
Stars: chromospheres
Stars: late-type
description As part of an ongoing project to study how reliable are the chromospheric models constructed semi-empirically to fit the chromospheric spectrum of cold stars, in this paper we study how changes in the assumed chromospheric structure of dM and dMe stars affect the emitted spectrum. In this way, we study if a given set of features can wholly determine the atmospheric structure, how large are the indeterminations in the atmospheric parameters deduced, and to what extent the atmospheric model computed can be considered unique. We find that the profiles of the Ca II K line or the Na D lines can be used to determine the structure of the Tmin region and that the Ha profile can provide good information on the structure of the chromosphere. The Lyα flux, in turn, can be used to constrain the position of the transition region.
format JOUR
author Mauas, P.J.D.
author_facet Mauas, P.J.D.
author_sort Mauas, P.J.D.
title Building reliable models of M dwarf chromospheres: The spectral diagnostics
title_short Building reliable models of M dwarf chromospheres: The spectral diagnostics
title_full Building reliable models of M dwarf chromospheres: The spectral diagnostics
title_fullStr Building reliable models of M dwarf chromospheres: The spectral diagnostics
title_full_unstemmed Building reliable models of M dwarf chromospheres: The spectral diagnostics
title_sort building reliable models of m dwarf chromospheres: the spectral diagnostics
url http://hdl.handle.net/20.500.12110/paper_0004637X_v539_n2PART1_p858_Mauas
work_keys_str_mv AT mauaspjd buildingreliablemodelsofmdwarfchromospheresthespectraldiagnostics
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