Possible chromospheric activity cycles in II peg, UX Ari and V711 Tau

We study the Mount Wilson indices we obtained indirectly from IUE high and low resolution spectra of the RS CVn-type systems II Peg (K2IV), UX Ari (K0IV+G5V) and V711 Tau (K1IV+G5V), extensively observed by IUE from 1978 to 1996. We analyze the activity signatures, which correspond to the primary st...

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Guardado en:
Detalles Bibliográficos
Publicado: 2009
Materias:
Activity
Binaries close
Spectroscopic
Techniques
Ultraviolet
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0094243X_v1094_n_p640_Buccino
http://hdl.handle.net/20.500.12110/paper_0094243X_v1094_n_p640_Buccino
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_0094243X_v1094_n_p640_Buccino
record_format dspace
spelling paper:paper_0094243X_v1094_n_p640_Buccino2023-06-08T15:09:05Z Possible chromospheric activity cycles in II peg, UX Ari and V711 Tau Activity Binaries close Spectroscopic Techniques Ultraviolet We study the Mount Wilson indices we obtained indirectly from IUE high and low resolution spectra of the RS CVn-type systems II Peg (K2IV), UX Ari (K0IV+G5V) and V711 Tau (K1IV+G5V), extensively observed by IUE from 1978 to 1996. We analyze the activity signatures, which correspond to the primary star, with the Lomb-Scargle periodogram. From the analysis of V711 Tau data, we found a possible chromospheric cycle with a period of 18 years and a shorter ∼3 year cycle, which could be associated to a chromospheric flip-flop cycle. The data of II Peg also suggest a chromospheric cycle of ∼21 years and a flip-flop cycle of ∼9 years. Finally, we obtained a possible chromospheric cycle of ∼6 years for UX Ari. © 2009 American Institute of Physics. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0094243X_v1094_n_p640_Buccino http://hdl.handle.net/20.500.12110/paper_0094243X_v1094_n_p640_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 Activity
Binaries close
Spectroscopic
Techniques
Ultraviolet
spellingShingle Activity
Binaries close
Spectroscopic
Techniques
Ultraviolet
Possible chromospheric activity cycles in II peg, UX Ari and V711 Tau
topic_facet Activity
Binaries close
Spectroscopic
Techniques
Ultraviolet
description We study the Mount Wilson indices we obtained indirectly from IUE high and low resolution spectra of the RS CVn-type systems II Peg (K2IV), UX Ari (K0IV+G5V) and V711 Tau (K1IV+G5V), extensively observed by IUE from 1978 to 1996. We analyze the activity signatures, which correspond to the primary star, with the Lomb-Scargle periodogram. From the analysis of V711 Tau data, we found a possible chromospheric cycle with a period of 18 years and a shorter ∼3 year cycle, which could be associated to a chromospheric flip-flop cycle. The data of II Peg also suggest a chromospheric cycle of ∼21 years and a flip-flop cycle of ∼9 years. Finally, we obtained a possible chromospheric cycle of ∼6 years for UX Ari. © 2009 American Institute of Physics.
title Possible chromospheric activity cycles in II peg, UX Ari and V711 Tau
title_short Possible chromospheric activity cycles in II peg, UX Ari and V711 Tau
title_full Possible chromospheric activity cycles in II peg, UX Ari and V711 Tau
title_fullStr Possible chromospheric activity cycles in II peg, UX Ari and V711 Tau
title_full_unstemmed Possible chromospheric activity cycles in II peg, UX Ari and V711 Tau
title_sort possible chromospheric activity cycles in ii peg, ux ari and v711 tau
publishDate 2009
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0094243X_v1094_n_p640_Buccino
http://hdl.handle.net/20.500.12110/paper_0094243X_v1094_n_p640_Buccino
_version_ 1768546533813256192

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