Zobrazeno 1 - 6
of 6
pro vyhledávání: '"Cincunegui, Carolina"'
We study the spectroscopic binary system Gl 375. We employ medium resolution echelle spectra obtained at the 2.15 m telescope at the Argentinian observatory CASLEO and photometric observations obtained from the ASAS database. We separate the composit
Externí odkaz:
http://arxiv.org/abs/0708.2065
Publikováno v:
Mon.Not.Roy.Astron.Soc.378:1007-1018,2007
We study the sodium D lines (D1: 5895.92 \AA; D2: 5889.95 \AA) in late-type dwarf stars. The stars have spectral types between F6 and M5.5 (B-V between 0.457 and 1.807) and metallicity between [Fe/H] = -0.82 and 0.6. We obtained medium resolution ech
Externí odkaz:
http://arxiv.org/abs/0704.0812
Publikováno v:
Astronomy & Astrophysics, Volume 461, Issue 3, January III 2007, pp.1107-1113
Several late-type stars present activity cycles resembling the Solar one. This fact has been observed mostly in stars ranging from F to K, i.e., in stars with a radiative core and an outer convective layer. This work aims at studying whether an activ
Externí odkaz:
http://arxiv.org/abs/astro-ph/0703514
Publikováno v:
Astron.Astrophys.469:309-317,2007
The main chromospheric activity indicator is the S index, which is esentially the ratio of the flux in the core of the Ca II H and K lines to the continuum nearby, and is well studied basically for stars from F to K. Another usual chromospheric proxy
Externí odkaz:
http://arxiv.org/abs/astro-ph/0703511
The main chromospheric activity indicator is the S index, which is esentially the ratio of the flux in the core of the Ca II H and K lines to the continuum nearby, and is well studied basically for stars from F to K. Another usual chromospheric proxy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35568bcdf6dbf40015312e09fd6f9311
Autor:
Cincunegui, Carolina, D, Pablo J.
Publikováno v:
The Astrophysical Journal; May 2001, Vol. 552 Issue: 2 p877-888, 12p
