2001A&A...367..939C


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.24CEST04:18:23

2001A&A...367..939C - Astronomy and Astrophysics, volume 367, 939-942 (2001/3-1)

The core-wing anomaly of cool Ap stars. Abnormal Balmer Profiles.

COWLEY C.R., HUBRIG S., RYABCHIKOVA T.A., MATHYS G., PISKUNOV N. and MITTERMAYER P.

Abstract (from CDS):

The profiles of Hα in a number of cool Ap stars are anomalous. Broad wings, indicative of temperatures in the range 7000-8000K end abruptly in narrow cores. The widths of these cores are compatible with those of dwarfs with temperatures of 6000 K or lower. This profile has been known for Przybylski's star, but it is seen in other cool Ap stars. The Hβ profile in several of these stars shows a similar core-wing anomaly (CWA). In Przybylski's star, the CWA is probably present at higher Balmer members. We are unable to account for these profiles within the context of LTE and normal dwarf atmospheres. We conclude that the atmospheres of these stars are not ``normal''. This is contrary to a notion that has long been held.

Abstract Copyright:

Journal keyword(s): stars: chemically peculiar - stars: chromospheres - stars: oscillations

Simbad objects: 15

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Number of rows : 15

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 HD 965 * 00 14 04.0647520206 -00 02 00.101552192   8.94 8.57     ApSrEuCr 55 0
2 * 63 Tau SB* 04 23 25.0639692398 +16 46 38.158913556   5.957 5.625 7.04 5.33 A1m 272 0
3 * alf CMi SB* 07 39 18.11950 +05 13 29.9552 0.82 0.79 0.37 -0.05 -0.28 F5IV-V+DQZ 1765 0
4 * tau UMa SB* 09 10 55.0404694887 +63 30 49.064336279   5.008 4.640     kA5hF0mF5II 215 1
5 HD 83368 a2* 09 36 25.40686 -48 45 04.2549   6.480 6.232     A8VSrCrEu+F9V 257 0
6 V* V816 Cen dS* 11 37 37.0411005456 -46 42 34.875395453 8.99 8.79 8.03     F8/G0p 292 0
7 * bet Vir PM* 11 50 41.7182390 +01 45 52.991019 4.26 4.15 3.60 3.13 2.85 F9V 859 0
8 * gam Vir B Pe* 12 41 39.5425844770 -01 26 57.847656959   3.85 3.49     F0mF2V 213 0
9 V* PP Vir a2* 14 04 48.9378026422 +05 24 51.462293664   8.70 8.29     F0 69 0
10 * bet CrB a2* 15 27 49.7315305 +29 06 20.522375 4.08 3.97 3.68 3.50 3.45 F2VpSrCrEuSi 655 0
11 * 33 Lib a2* 15 29 34.7422042673 -17 26 27.375775287 7.22 7.07 6.69     F0VspEuGdSr 235 0
12 V* V694 CrA a2* 18 12 25.8347315452 -37 45 09.274292137   8.34 7.92     ApSrCrEu 103 0
13 * 10 Aql a2* 18 58 46.9239770705 +13 54 23.944546333 6.23 6.14 5.89     A7VpSrEu_Ksn 269 0
14 * gam Equ a2* 21 10 20.5001160337 +10 07 53.682085548 5.03 4.94 4.68 4.43 4.32 A9VpSrCrEu 516 0
15 V* BP Gru a2* 23 01 46.8212643426 -44 50 26.878058323   7.99 7.52     ApSrSi: 116 0

    Equat.    Gal    SGal    Ecl

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2020.10.24-04:18:24

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