2005A&A...429.1043B


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.24CET19:27:45

2005A&A...429.1043B - Astronomy and Astrophysics, volume 429, 1043-1049 (2005/1-3)

The field Am and ρ Puppis-like stars: Lithium and heavier elements.

BURKHART C., COUPRY M.F., FARAGGIANA R. and GERBALDI M.

Abstract (from CDS):

With observations at the Canada-France-Hawaii telescope, photospheric abundances of two evolved field Am stars, tau UMa and HR 178, have been determined for Li, Al, Si, S, Fe, Ni, and Eu by model abundance analysis. Thanks to these new determined abundances and the HIPPARCOS mission, making it possible to better estimate the evolutionary stage of field stars, one can consider the influence of evolution on the abundances of Am stars. No abundance trend for Al, Si, S, and Fe is found during Main Sequence evolution, up to its very last phases. The abundance of Li is, generally, cosmic. Large Li deficiencies may be observed in the very last phases (the ``hook'' region of the H-R diagram) and, too, on the red side of the Am phenomenon region where the ρ Puppis-like stars lie.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: chemically peculiar - stars: individual: τ UMa - stars: evolution

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 HD 3883 ** 00 41 36.0369780076 +24 37 44.432978078   6.333 6.046     kA5hF1mF2 116 0
2 * rho Pup dS* 08 07 32.6488235 -24 18 15.567946 3.43 3.24 2.81 2.46 2.25 F5IIkF2IImF5II 282 0
3 * tau UMa SB* 09 10 55.0404694887 +63 30 49.064336279   5.008 4.640     kA5hF0mF5II 218 1
4 * zet01 Lyr SB* 18 44 46.3573535 +37 36 18.417053 4.71 4.55 4.36 4.21 4.13 kA5hF0VmF3 188 0
5 * 15 Vul a2* 20 01 06.0484585 +27 45 12.863884   4.829 4.651     A4III 228 0
6 * gam Cap a2* 21 40 05.4564778 -16 39 44.307184 4.19 3.98 3.67 3.47 3.34 kF0hF1VmF2 189 0
7 * 32 Aqr SB* 22 04 47.4219684698 -00 54 22.846937982   5.519 5.271     A5IV 173 0

    Equat.    Gal    SGal    Ecl

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