Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/32880
Titolo: | First long-term activity study of AU Microscopii: a possible chromospheric cycle | Autori: | Ibañez, R. V. Buccino, A. P. Flores, M. Martinez, C. I. Maizel, D. MESSINA, Sergio Mauas, P. J. D. |
Data pubblicazione: | 2019 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 483 | Fascicolo: | 1 | Da pagina:: | 1159 | Abstract: | M stars are ideal targets to search for Earth-like planets. However, they usually have high levels of magnetic activity, which could affect their habitability and make difficult the detection of exoplanets orbiting around them. Unfortunately, long-term variability of dM stars has not been extensively studied, due to their low intrinsic brightness. For this reason, in 1999 we started the HKalpha project, which systematically observes the spectra of a large number of stars, in particular dM stars, at the Complejo Astronomico El Leoncito (CASLEO). In this work, we study the long-term activity of the young active dM1 star AU Microscopii. We analyze the Mount Wilson index S derived from CASLEO spectra obtained between 2004 and 2016, which we complement with the S-index derived from HARPS, FEROS and UVES public spectra. We also analyze the simultaneous photometric counterpart provided by the ASAS public database for this star between 2000 and 2009, and our own photometry. In both totally independent time series, we detect a possible activity cycle of period around 5 years. We also derived a precise rotation period for this star P rot = 4.85 days, consistent with the literature. This activity cycle reflects that an alphaOmega dynamo could be operating in this star. | URI: | http://hdl.handle.net/20.500.12386/32880 | URL: | https://academic.oup.com/mnras/article/483/1/1159/5212318 http://arxiv.org/abs/1901.01433v1 |
ISSN: | 0035-8711 | DOI: | 10.1093/mnras/sty3147 | Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
File in questo documento:
File | Descrizione | Dimensioni | Formato | |
---|---|---|---|---|
sty3147.pdf | Pdf editoriale | 555.94 kB | Adobe PDF | Visualizza/apri |
1901.01433.pdf | postprint | 453.1 kB | Adobe PDF | Visualizza/apri |
Page view(s)
32
controllato il 31-ago-2024
Download(s)
27
controllato il 31-ago-2024
Google ScholarTM
Check
Altmetric
Altmetric
Tutti i documenti in DSpace sono pubblicati ad Accesso Aperto, salvo diversa indicazione per alcuni documenti specifici.