2005A&A...441..303Z


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.14CEST18:46:54

2005A&A...441..303Z - Astronomy and Astrophysics, volume 441, 303 (2005/10-1)

A detailed spectroscopy of the carbon-rich star BD+57deg2161.

ZACS L., SCHMIDT M.R., MUSAEV F.A., GALAZUTDINOV G.A. and SPERAUSKAS J.

Abstract (from CDS):

An LTE abundance analysis based on high-resolution spectra is presented for the carbon-rich star BD+57° 2161, whose evolutionary status is unknown. With [C/Fe]=+0.4dex and a mean s-process overabundance of [s/Fe]≃+1.5 dex the peculiar atmospheric composition of BD+57° 2161 is confirmed. The 12C/13C abundance ratio was found to be about 10. The mild iron deficiency, [Fe/H]=-0.2, supports the idea that BD+57° 2161 could be an old-disk-population object. Radial-velocity measurements confirm the binary nature of the star. Therefore the peculiar chemical composition could be due to the mass transfer from the secondary - AGB star in the past. Orbital parameters are estimated for another star of this group, BD+75° 348.

Abstract Copyright:

Journal keyword(s): stars: evolution - stars: atmospheres - stars: abundances - stars: chemically peculiar - stars: individual: BD+57° 2161 - stars: individual: BD+75° 348

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 BD+75 348 C* 08 46 11.6378906707 +74 32 31.237557585   10.63 9.54     C3,0_Ba4 36 0
2 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2136 0
3 BD+57 2161 Pe* 20 14 07.7503937767 +58 06 19.420419723   11.3 9.68     C4,1_CH3_Ba4 25 0
4 HD 196944 Pe* 20 40 46.0790261041 -06 47 50.650812411   9.01 8.40 8.08   CEMP-s 86 0
5 HD 201626 Pe* 21 09 59.2669493692 +26 36 55.010503706 9.73 9.26 8.16 7.34 6.82 C-H2IV: 139 0

    Equat.    Gal    SGal    Ecl

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2020.08.14-18:46:54

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