Chemical composition of semi-regular variable giants

Details Chemical composition of semi-regular variable giants Chemical composition of semi-regular variable giants

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007a%26a...464..709a&link_type=abstract

Astronomy and Astrophysics, Volume 464, Issue 2, March III 2007, pp.709-713

Astronomy and Astrophysics

Astrophysics

2

Stars: Variables: General, Stars: Abundances

Scientific paper

Aims:The aim of this work was to derive chemical abundances in 5 stars that were previously reported to be SRd variable stars from the halo population, and, in particular, to check if manganese does show significant underabundance in our program stars similar to that of TY Vir, first detected by Luck & Bond. Methods: Elemental abundances have been found through the LTE and NLTE analyses, applied to high-resolution (R˜50 000) spectra. Results: We have derived the abundances of 18 chemical elements in RX Vir, AB Leo, CK Vir, SV UMa, and TY Vir, and made the following conclusions. Conclusions: .RX Vir is a typical solar-like star. Its classification as a halo population SRd variable star should be ruled out. The remaining four stars of our program have chemical composition and fundamental parameters that confirm their status as metal-deficient halo giants. All studied SRd giants have relative-to-solar elemental abundances typical of the field halo stars of metallicity -1.8. There is only one exception, which is the relative manganese abundance. All SRd program stars show uniform [Mn/Fe] ratios that are typical of the stars with metallicity [Fe/H] ≈ -3.5. The reason for such a low manganese abundance in these stars is unknown.
Based on observations obtained at the Canada-France-Hawaii Telescope (CFHT), which is operated by the National Research Council of Canada, the Institute National des Sciences de l'Univers of the Centre National de la Recherche Scientifique of France, and the University of Hawaii.

Affiliated with

Also associated with

No associations

Rating

Chemical composition of semi-regular variable giants does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Chemical composition of semi-regular variable giants, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chemical composition of semi-regular variable giants will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-856737