Blue lines as chromospheric diagnostics: The Al I lines at 3944 and 3961 Å

We present a simple atomic model for the synthesis of the Al I resonance lines, near the Ca II H and K lines. We study whether the computed profiles are influenced by the choice of the atomic parameters and find that, although several cross sections are not known accurately, the line profiles do not...

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Autores principales: Mauas, P.J.D., Borda, R.F., Luoni, M.L.
Formato: JOUR
Materias:
Atomic processes
Line: Formation
Line: Profiles
Stars: Chromospheres
Sun: Chromosphere
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00670049_v142_n2_p285_Mauas
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00670049_v142_n2_p285_Mauas
record_format dspace
spelling todo:paper_00670049_v142_n2_p285_Mauas2023-10-03T14:53:08Z Blue lines as chromospheric diagnostics: The Al I lines at 3944 and 3961 Å Mauas, P.J.D. Borda, R.F. Luoni, M.L. Atomic processes Line: Formation Line: Profiles Stars: Chromospheres Sun: Chromosphere We present a simple atomic model for the synthesis of the Al I resonance lines, near the Ca II H and K lines. We study whether the computed profiles are influenced by the choice of the atomic parameters and find that, although several cross sections are not known accurately, the line profiles do not depend on them and are therefore useful as diagnostics of the atmospheric structure. We study which transitions need not to be included in the model, in order to reduce as much as possible the computing time. We compare the profiles computed for a standard model of the quiet solar atmosphere with the observations and find very good agreement. We found that the inclusion of the proper line-blanketing opacity is fundamental for an accurate calculation of the ionization balance and that irradiation by UV lines originating in the transition region does not affect the AI I emission. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00670049_v142_n2_p285_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 Atomic processes
Line: Formation
Line: Profiles
Stars: Chromospheres
Sun: Chromosphere
spellingShingle Atomic processes
Line: Formation
Line: Profiles
Stars: Chromospheres
Sun: Chromosphere
Mauas, P.J.D.
Borda, R.F.
Luoni, M.L.
Blue lines as chromospheric diagnostics: The Al I lines at 3944 and 3961 Å
topic_facet Atomic processes
Line: Formation
Line: Profiles
Stars: Chromospheres
Sun: Chromosphere
description We present a simple atomic model for the synthesis of the Al I resonance lines, near the Ca II H and K lines. We study whether the computed profiles are influenced by the choice of the atomic parameters and find that, although several cross sections are not known accurately, the line profiles do not depend on them and are therefore useful as diagnostics of the atmospheric structure. We study which transitions need not to be included in the model, in order to reduce as much as possible the computing time. We compare the profiles computed for a standard model of the quiet solar atmosphere with the observations and find very good agreement. We found that the inclusion of the proper line-blanketing opacity is fundamental for an accurate calculation of the ionization balance and that irradiation by UV lines originating in the transition region does not affect the AI I emission.
format JOUR
author Mauas, P.J.D.
Borda, R.F.
Luoni, M.L.
author_facet Mauas, P.J.D.
Borda, R.F.
Luoni, M.L.
author_sort Mauas, P.J.D.
title Blue lines as chromospheric diagnostics: The Al I lines at 3944 and 3961 Å
title_short Blue lines as chromospheric diagnostics: The Al I lines at 3944 and 3961 Å
title_full Blue lines as chromospheric diagnostics: The Al I lines at 3944 and 3961 Å
title_fullStr Blue lines as chromospheric diagnostics: The Al I lines at 3944 and 3961 Å
title_full_unstemmed Blue lines as chromospheric diagnostics: The Al I lines at 3944 and 3961 Å
title_sort blue lines as chromospheric diagnostics: the al i lines at 3944 and 3961 å
url http://hdl.handle.net/20.500.12110/paper_00670049_v142_n2_p285_Mauas
work_keys_str_mv AT mauaspjd bluelinesaschromosphericdiagnosticsthealilinesat3944and3961a
AT bordarf bluelinesaschromosphericdiagnosticsthealilinesat3944and3961a
AT luoniml bluelinesaschromosphericdiagnosticsthealilinesat3944and3961a
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