2000A&AS..144..203H


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.22CEST16:38:00

2000A&AS..144..203H - Astron. Astrophys., Suppl. Ser., 144, 203-209 (2000/June-1)

Metal abundances of field A and Am stars.

HUI-BON-HOA A.

Abstract (from CDS):

Detailed abundances of 9 field A and Am stars are derived for Mg, Ca, Sc, Cr, Fe, and Ni using high resolution spectroscopy. Most of our sample Am stars show the characteristic deficiencies of Ca and Sc on one hand, and the overabundances of the iron peak elements on the other, which is consistent with the predictions of the diffusion model for Main Sequence or slightly evolved stars. There seems to be a correlation between abundances of Ca and Sc and the effective temperature for stars of similar age: the abundance of Ca increases with increasing mass whereas that of Sc decreases. Two of our Am stars have a different abundance pattern: Ca is overabundant in the hot magnetic Am star o Peg and its abundance is nearly normal in the metallic giant star ρ Pup. The other objects of our sample have globally a solar composition except 28 And, which shows significant deficiencies for most the studied elements.

Abstract Copyright:

Journal keyword(s): stars: abundances - chemically peculiar

Simbad objects: 9

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Number of rows : 9

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 * 28 And dS* 00 30 07.3626822971 +29 45 05.592507696   5.467 5.214     A7III 203 0
2 * 9 Aur gD* 05 06 40.6313508866 +51 35 51.804886029       4.8   F2V 181 0
3 * 14 Aur dS* 05 15 24.3939839964 +32 41 15.363849904   5.217 5.000 6.45   A9V 190 0
4 * 6 Mon * 06 17 35.1249899399 -10 43 29.966835529   7.092 6.747     F0IV 44 0
5 V* RR Lyn EB* 06 26 25.8361134376 +56 17 06.356599597   5.76 5.54     kA3hA7VmF2 201 0
6 * rho Pup dS* 08 07 32.6488235 -24 18 15.567946 3.43 3.24 2.81 2.46 2.25 F5IIkF2IImF5II 283 0
7 * tau UMa SB* 09 10 55.0404694887 +63 30 49.064336279   5.008 4.640     kA5hF0mF5II 222 1
8 * 32 Aqr SB* 22 04 47.4219684698 -00 54 22.846937982   5.519 5.271     A5IV 173 0
9 * omi Peg * 22 41 45.3989328992 +29 18 27.554214525 4.77 4.78 4.79 4.75 4.77 A1IV 272 0

    Equat.    Gal    SGal    Ecl

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2021.04.22-16:38:00

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