2007A&A...463.1093L


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.19CEST20:37:42

2007A&A...463.1093L - Astronomy and Astrophysics, volume 463, 1093-1109 (2007/3-1)

Statistical properties of a sample of periodically variable B-type supergiants. Evidence for opacity-driven gravity-mode oscillations.

LEFEVER K., PULS J. and AERTS C.

Abstract (from CDS):

We have studied a sample of 28 periodically variable B-type supergiants selected from the HIPPARCOS mission and 12 comparison stars covering the whole B-type spectral range. Our goal is to test if their variability is compatible with opacity-driven non-radial oscillations. We have used the NLTE atmosphere code FASTWIND to derive the atmospheric and wind parameters of the complete sample through line profile fitting. We applied the method to selected H, He, and Si line profiles, measured with the high resolution CES spectrograph attached to the ESO CAT telescope in La Silla, Chile. From the location of the stars in the (logTeff, logg) diagram, we suggest that variability of our sample supergiants is indeed due to the gravity modes resulting from the opacity mechanism. We find nine of the comparison stars to be periodically variable as well, and suggest them to be new αCyg variables. We find marginal evidence of a correlation between the amplitude of the photometric variability and the wind density. We investigate the wind momentum-luminosity relation for the whole range of B spectral type supergiants, and find that the later types (>B5) perfectly follow the relation for A supergiants. Additionally, we provide a new spectral type - Teff calibration for B supergiants. Our results imply the possibility of probing internal structure models of massive stars of spectral type B through seismic tuning of gravity modes.

Abstract Copyright:

Journal keyword(s): stars: atmospheres - stars: early-type - stars: fundamental parameters - stars: mass-loss - stars: oscillations - stars: variables: general

Simbad objects: 51

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Number of rows : 51

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10562 1
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9091 1
3 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5018 1
4 * bet Ori s*b 05 14 32.27210 -08 12 05.8981 -0.56 0.10 0.13 0.13 0.15 B8Iae 725 0
5 M 79 GlC 05 24 10.59 -24 31 27.3   9.21 8.16     ~ 690 0
6 HD 46769 * 06 35 15.8292648574 +00 53 24.802111917 5.43 5.84 5.86 5.78 5.81 B7Ib-II 78 0
7 HD 47240 Pu* 06 37 52.7036331811 +04 57 24.007346108 5.65 6.35 6.20 5.98 5.87 B1Ib 148 0
8 HD 51110 Pu* 06 55 11.7359561465 -21 52 18.928140065   8.59 8.71     B9Ib/II 17 0
9 * omi02 CMa s*b 07 03 01.4721150 -23 49 59.852308 2.14 2.94 3.02 3.01 3.10 B3Ia 304 0
10 HD 54764 Pu* 07 09 33.3635217792 -16 14 04.227700397 5.320 6.120 6.080 7.42   B1Ib/II 71 0
11 * eta CMa s*b 07 24 05.70228 -29 18 11.1798 1.65 2.37 2.45 2.38 2.44 B5Ia 353 0
12 * J Pup * 07 53 18.1579197 -48 06 10.563676 3.11 4.10 4.24 4.26 4.38 B0.5Ib 216 0
13 HD 68161 Pu* 08 09 09.5065659725 -48 41 03.874075915   5.544 5.654     B8III 34 0
14 HD 71913 Pu* 08 28 43.0050631022 -34 43 53.818153019 6.75 7.57 7.68 8.61   B1/2II 27 0
15 HD 75149 s*b 08 46 30.5468343288 -45 54 45.012400213 5.25 5.677 5.459 6.77   B5Iab 98 0
16 HD 80558 s*b 09 18 42.3559725873 -51 33 38.336390468 6.15 6.47 5.93 5.36 4.94 B6Ia 102 0
17 * phi Vel * 09 56 51.7416742 -54 34 04.039043 2.81 3.35 3.45 3.51 3.59 B5Ib 120 0
18 HD 89767 s*b 10 20 11.7403831405 -52 36 06.156531112 6.63 8.82 7.212 8.13   B0.5/1Iab 29 0
19 HD 91024 s*b 10 28 49.2605719580 -60 53 40.860179670 7.52 7.89 7.64 8.57   B8Iab 28 0
20 HD 91943 Pu* 10 35 42.0070286836 -58 11 34.375764723 5.91 6.74 6.70 7.70   B0.7Ib 94 0
21 HD 92964 s*b 10 42 40.5663586355 -59 12 56.727932428 5.12 5.78 5.51 5.30 5.00 B2.5Ia 136 0
22 HD 93619 Pu* 10 47 19.0742721963 -57 19 31.525630639 6.44 7.067 6.977 7.74   B0.5Ib 28 0
23 HD 94367 sg* 10 52 30.8460399674 -57 14 25.453435058 4.87 5.41 5.25     A0Ia 52 0
24 HD 94909 s*b 10 56 24.4659629041 -57 33 04.826803339 7.31 7.82 7.34 8.13   B0Ia 64 0
25 HD 96880 V* 11 08 24.5530220126 -59 24 45.390314843 7.51 8.03 7.57 8.50   B1Iab/b 42 0
26 V* V536 Car bC* 11 18 18.3434447400 -62 58 28.471352841 8.56 9.55 9.49 9.48   B2.5Ib/II 28 1
27 HD 102997 s*b 11 51 12.9876934298 -61 50 46.145650541 6.31 6.786 6.556 7.33   B5Ia 65 0
28 HD 105056 s*b 12 05 49.8805966991 -69 34 22.993604342 6.57 9.07 8.74 8.45   ON9.7Iae 118 1
29 HD 106068 * 12 12 21.9798375290 -62 57 02.787321889 5.90 6.28 5.98 5.64 5.39 B8Ia/ab 71 0
30 HD 106343 s*b 12 14 16.9255009123 -64 24 30.669505386 5.58 6.292 6.235     B1.5Ia 82 0
31 HD 108659 Pu* 12 29 31.1060539567 -66 51 37.756638264 7.25 7.63 7.36 8.28   B5Ib 26 0
32 HD 109867 s*b 12 38 52.3586203902 -67 11 34.977744461 5.5 6.263 6.265 7.45   B0.5/1Iab 92 0
33 HD 111904 V* 12 53 21.8939526500 -60 19 42.561485784 5.75 6.05 5.77 7.09   B9Iab 99 0
34 NGC 4755 OpC 12 53 39 -60 21.7           ~ 264 0
35 HD 111990 * 12 53 59.7990827718 -60 20 07.505578149 6.46 6.95 6.77 7.68   B1/2Ib 74 1
36 HD 115363 s*b 13 18 06.8645878178 -63 41 13.634362256 7.95 8.46 7.87 8.72   B1Ia+ 72 0
37 * v Cen * 14 20 19.5426210 -56 23 11.389952 4.04 4.47 4.35 4.20 4.06 B5Ib/II 73 0
38 HD 141318 Pu* 15 51 06.8044833762 -55 03 19.931264880 5.13 5.756 5.767 7.08   B2III 78 0
39 V* V372 Nor a2* 16 26 23.9156306935 -56 53 04.254155245   7.81 7.83     B8/9II 12 0
40 HD 148688 s*b 16 31 41.7695375461 -41 49 01.729591907 5.16 5.78 5.39 5.05 4.70 B1Iaeqp 152 0
41 * mu. Nor s*b 16 34 05.0202815 -44 02 43.128156 4.05 4.99 4.94 6.36   O9.7Iab 255 0
42 HD 154043 s*b 17 05 18.8802659494 -47 04 08.538992563 7.37 7.73 7.10 7.83   B2Iab 43 0
43 HD 157038 s*b 17 22 39.2179048420 -37 48 16.698784191 6.99 7.20 6.44 5.70 5.15 B3Iap 99 0
44 V* V2371 Oph bC* 17 24 34.8185131933 -26 55 29.009308029 9.33 9.61 9.07 9.59   B1/2Ib 24 0
45 * gam Ara Be* 17 25 23.6593111 -56 22 39.814775 2.25 3.21 3.34     B1Ib 251 0
46 * tet Ara * 18 06 37.8712898 -50 05 29.312523 2.73 3.58 3.66     B2Ib 173 0
47 V* V4382 Sgr bC* 18 08 44.9164167739 -22 09 38.446447549 7.2 7.93 7.94 8.86   B1/2II 37 0
48 M 16 OpC 18 18 48 -13 48.4   6.58 6.0     ~ 919 2
49 V* QR Ser bL* 18 18 58.6905343193 -13 59 28.459499667 7.92 8.55 8.28 9.07   O9.5III+B3-5V/III 74 0
50 HD 170938 s*b 18 32 37.7938285604 -15 42 05.894746307 8.58 8.84 7.99 7.28 6.45 B1Ia 66 0
51 * bet Cep bC* 21 28 39.5968513 +70 33 38.574681 2.05 3.01 3.23 3.33 3.55 B0.5IIIs 677 0

    Equat.    Gal    SGal    Ecl

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2019.10.19-20:37:42

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