dc.creator | Buccino, Andrea Paola | |
dc.creator | Mauas, Pablo Jacobo David | |
dc.date.accessioned | 2017-07-28T16:18:37Z | |
dc.date.accessioned | 2018-11-06T14:14:10Z | |
dc.date.available | 2017-07-28T16:18:37Z | |
dc.date.available | 2018-11-06T14:14:10Z | |
dc.date.created | 2017-07-28T16:18:37Z | |
dc.date.issued | 2009-12 | |
dc.identifier | Buccino, Andrea Paola; Mauas, Pablo Jacobo David; Long-term chromospheric activity of non-eclipsing RS CVn-type stars chromospheric activity of non-eclipsing RS CVn-type stars; EDP Sciences; Astronomy and Astrophysics; 495; 1; 12-2009; 287-295 | |
dc.identifier | 0004-6361 | |
dc.identifier | http://hdl.handle.net/11336/21513 | |
dc.identifier | CONICET Digital | |
dc.identifier | CONICET | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1884228 | |
dc.description.abstract | Context: The IUE database provides a large number of UV high and low-resolution spectra of RS CVn-type stars from 1978 to 1996. In particular, many of these stars were monitored continuously during several seasons by IUE. Aims: Our main purpose is to study the short and long-term chromospheric acti- vity of the RS CVn systems most observed by IUE: HD 22468 (V711 Tau, HR 1099, K1IV+G5V), HD 21242 (UX Ari, K0IV+G5V) and HD 224085 (II Peg, K2IV). Methods: We first obtain the Mount Wilson index S from the IUE high and low- resolution spectra. Secondly, we analyse with the Lomb-Scargle periodogram the mean annual index S and the amplitude of the rotational modulation of the index S. Results: For HD 22468 (V711 Tau, HR 1099), we found a possible chromospheric cycle with a period of 18 years and a shorter cycle with a period of 3 years, which could be associated to a chromospheric "flip- flop" cycle. The data of HD 224085 (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 7 years for HD 21242 (UX Ari). | |
dc.language | eng | |
dc.publisher | EDP Sciences | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/0812.3827 | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2009/07/aa10985-08/aa10985-08.html | |
dc.relation | info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361:200810985 | |
dc.rights | https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ | |
dc.rights | info:eu-repo/semantics/openAccess | |
dc.subject | Astrophysics | |
dc.title | Long-term chromospheric activity of non-eclipsing RS CVn-type stars chromospheric activity of non-eclipsing RS CVn-type stars | |
dc.type | Artículos de revistas | |
dc.type | Artículos de revistas | |
dc.type | Artículos de revistas | |