2005A&A...432.1013D


Query : 2005A&A...432.1013D

2005A&A...432.1013D - Astronomy and Astrophysics, volume 432, 1013-1024 (2005/3-4)

A study of bright southern slowly pulsating B stars. III. Mode identification for singly-periodic targets in spectroscopy.

DE CAT P., BRIQUET M., DASZYNSKA-DASZKIEWICZ J., DUPRET M.A., DE RIDDER J., SCUFLAIRE R. and AERTS C.

Abstract (from CDS):

We present the results of the mode identification for a sample of 7 bright southern slowly pulsating B stars showing one pulsation frequency in the λλ 413nm SiII profiles. We combined the results from (1) the method of photometric amplitudes; (2) the moment method; and (3) the amplitude and phase variation across the profile to search for the l and m values of the modes best fitting the data. It is the first time that the applicability of these techniques is tested to a sample of main-sequence g-mode pulsators. Combining the moment method with the amplitude and phase variations across the observed line profile gives an improvement in spectroscopic identification of low degree l g-mode pulsations. Using the variations of the higher order even moments <v4> and <v6> of the moment method solutions can also help. For HD 181558, HD 24587, HD 140873 and HD 177863, the photometric and spectroscopic results are compatible and point towards (l,m)=(1,+1) sectoral modes. For HD 215573, HD 53921 and HD 92287, the results are inconclusive. Our proposed methodology for mode identification is also applicable to γ Doradus stars.

Abstract Copyright:

Journal keyword(s): stars: early-type - stars: variables: general - stars: oscillations - line: profiles

Simbad objects: 10

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Number of rows : 10
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 * tau08 Eri SB* 03 53 42.7017788445 -24 36 44.024190393   4.496 4.623     B6V 109 0
2 HD 53921 ** 07 03 15.09928 -59 10 41.1857           B9III+B8V 60 0
3 * 26 CMa Pu* 07 12 12.2148338369 -25 56 33.310655792 5.03 5.736 5.897     B2IV/V 77 0
4 V* NO Vel EB* 08 13 36.1533370747 -46 59 29.845770791 4.32 4.981 5.127     B3III 76 0
5 HR 5543 ** 14 52 51.0737484 -37 48 11.386959 4.11 4.855 5.015     B7IIIp 114 0
6 * 25 Ser SB* 15 46 05.6368725756 -01 48 15.077828916 4.96 5.37 5.39     B8IV/V 108 0
7 * nu. Pav SB* 18 31 22.4250858 -62 16 41.885313 4.14 4.53 4.64     B7III 62 0
8 HD 177863 SB* 19 07 08.3281460860 -18 44 17.402016979   6.243 6.293     B8V 70 0
9 HD 181558 Pu* 19 21 37.1136252032 -19 14 04.049964502 5.65 6.16 6.26     B5III 63 0
10 * ksi Oct Pu* 22 50 22.8150133339 -80 07 25.843285679 4.7 5.180 5.311     B6V 87 0

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2021.10.16-23:10:48

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