A statistical analysis of Hα-Ca II relation for solar-type stars of different activity levels
Based on our large spectral database obtained at CASLEO Argentinian Observatory, we analyzed the relation between simultaneous measurements of Hα and Ca ii H+K fluxes. Although the correlation between both proxies is positive for the solar case, in 2007 our group found that while some stars exhibit...
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2011
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17439213_v7_nS286_p324_Buccino http://hdl.handle.net/20.500.12110/paper_17439213_v7_nS286_p324_Buccino |
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paper:paper_17439213_v7_nS286_p324_Buccino2023-06-08T16:28:07Z A statistical analysis of Hα-Ca II relation for solar-type stars of different activity levels late-type line: profiles methods: statistical stars: activity Based on our large spectral database obtained at CASLEO Argentinian Observatory, we analyzed the relation between simultaneous measurements of Hα and Ca ii H+K fluxes. Although the correlation between both proxies is positive for the solar case, in 2007 our group found that while some stars exhibit correlations between Hα and the Ca ii lines, the slopes change from star to star, including cases where no correlation was found. To discern if this flux-flux relation depends on the level of activity of the star and if it is associated with the distribution of active regions in the stellar atmosphere, in this work we analyze the relation between Hα-Ca ii fluxes for the whole set of 44 G dwarf stars and individually for a subset of several solar-type stars of different level of activity. © 2012 International Astronomical Union. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17439213_v7_nS286_p324_Buccino http://hdl.handle.net/20.500.12110/paper_17439213_v7_nS286_p324_Buccino |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
late-type line: profiles methods: statistical stars: activity |
| spellingShingle |
late-type line: profiles methods: statistical stars: activity A statistical analysis of Hα-Ca II relation for solar-type stars of different activity levels |
| topic_facet |
late-type line: profiles methods: statistical stars: activity |
| description |
Based on our large spectral database obtained at CASLEO Argentinian Observatory, we analyzed the relation between simultaneous measurements of Hα and Ca ii H+K fluxes. Although the correlation between both proxies is positive for the solar case, in 2007 our group found that while some stars exhibit correlations between Hα and the Ca ii lines, the slopes change from star to star, including cases where no correlation was found. To discern if this flux-flux relation depends on the level of activity of the star and if it is associated with the distribution of active regions in the stellar atmosphere, in this work we analyze the relation between Hα-Ca ii fluxes for the whole set of 44 G dwarf stars and individually for a subset of several solar-type stars of different level of activity. © 2012 International Astronomical Union. |
| title |
A statistical analysis of Hα-Ca II relation for solar-type stars of different activity levels |
| title_short |
A statistical analysis of Hα-Ca II relation for solar-type stars of different activity levels |
| title_full |
A statistical analysis of Hα-Ca II relation for solar-type stars of different activity levels |
| title_fullStr |
A statistical analysis of Hα-Ca II relation for solar-type stars of different activity levels |
| title_full_unstemmed |
A statistical analysis of Hα-Ca II relation for solar-type stars of different activity levels |
| title_sort |
statistical analysis of hα-ca ii relation for solar-type stars of different activity levels |
| publishDate |
2011 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17439213_v7_nS286_p324_Buccino http://hdl.handle.net/20.500.12110/paper_17439213_v7_nS286_p324_Buccino |
| _version_ |
1768546557515268096 |