2008A&A...477..907P

Query : 2008A&A...477..907P

2008A&A...477..907P - Astronomy and Astrophysics, volume 477907-915 (2008/1-3)

β Cephei stars in the ASAS-3 data. I. Long-term variations of periods and amplitudes.

PIGULSKI A. and POJMANSKI G.

Abstract (from CDS):

We analyse V-filter ASAS-3 photometry of 41 known β Cephei-type stars. The ASAS-3 photometry is combined with the archival data, if available, to determine long-term stability of periods and amplitudes of excited modes. Frequencies of modes are derived by means of Fourier periodograms with consecutive prewhitening. The results are examined in the context of detection threshold. We detected amplitude changes in three β Cephei stars, BW Cru, V836 Cen, and V348 Nor. Period changes were found in KK Vel and V836 Cen. Our analysis shows that intrinsic period changes are more common among multiperiodic stars, apparently because they are caused by some kind of mode interaction. In addition, we found new modes for seven stars, and for ten others we provide new solutions or remove ambiguities in the detected frequencies. One candidate hybrid β Cephei/SPB star, HD133823, is discovered.

Abstract Copyright: ∼

Journal keyword(s): stars: early-type - stars: oscillations - surveys

VizieR on-line data: <Available at CDS (J/A+A/477/907): stars.dat lc1.dat>

Simbad objects: 59

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Number of rows : 59
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Bol 203 GlC 00 43 55.82 +41 32 35.0 17.955 17.645 16.825 16.280 15.735 ~ 41 0
2 * del Cet bC* 02 39 28.9568473856 +00 19 42.631195332 2.97 3.85 4.07     B2IV 395 0
3 HD 37371 Or* 05 38 09.9005786376 -00 11 01.167279252   8.69 8.64 9.47   A0IV 38 0
4 * bet CMa bC* 06 22 41.9853527 -17 57 21.307352 0.77 1.73 1.97 2.11 2.35 B1II-III 748 0
5 * 27 CMa Be* 07 14 15.2117197408 -26 21 09.028965559 3.76 4.45 4.65 4.64 4.73 B4Ve_sh 240 0
6 V* V350 Pup bC* 07 30 34.0740522576 -34 05 26.146528476 6.7 7.55 7.62     B1/2Ib/II 48 0
7 HD 71913 Pu* 08 28 43.0049609928 -34 43 53.818406760 6.75 7.57 7.68 8.61   B1/2II 36 0
8 V* KK Vel bC* 09 07 42.5207085395 -44 37 56.750000545 6.03 6.76 6.80     B2II/III 68 0
9 V* IL Vel bC* 09 17 31.1516725008 -52 50 19.476373704 8.51 9.13 9.16     B2III 44 0
10 HD 90288 bC* 10 23 56.9130221208 -57 27 52.421282964 7.05 8.02 8.17     B2III/IV 42 0
11 V* V401 Car bC* 10 35 30.0530262192 -58 12 08.180867304 8.83 9.57 9.50 9.89 9.36 B5 64 0
12 V* V403 Car bC* 10 35 40.7035044864 -58 12 44.280907776 7.93 8.75 8.73 9.48 8.65 B1III 63 1
13 NGC 3293 OpC 10 35 50.3 -58 14 04           ~ 327 0
14 HD 92024 Pu* 10 36 08.3339354160 -58 13 04.358647920 8.11 8.90 9.00 9.63 8.94 B1III 71 0
15 V* V1228 Cen bC* 11 33 18.0211695240 -63 06 16.213109580 9.07 9.77 9.62 9.95   B1III 31 0
16 CPD-62 2707 bC? 12 22 12.8654135976 -63 20 47.806965096 9.43 10.09 10.07 10.16   B2III 25 0
17 V* FG Cru bC* 12 37 47.7404382288 -62 19 22.877762700 10.15 10.60 10.17 10.16   OB 16 0
18 V* KZ Mus bC* 12 39 19.1644392600 -71 37 18.461864856 8.49 9.09 9.02     B2III 53 0
19 V* FL Cru bC* 12 53 18.6984441864 -64 01 23.978592912 12.42 12.48 11.52 11.39   OB- 14 0
20 NGC 4755 OpC 12 53 39.2 -60 22 07           ~ 300 0
21 CPD-59 4550 bC* 12 53 46.9935752640 -60 18 35.656553808 9.63 10.49 10.29     B1.5Vn 35 0
22 CPD-59 4564 bC* 12 53 57.5386794336 -60 24 58.092625152 8.45 9.12 9.06 9.64   B2III 65 0
23 V* V856 Cen bC* 12 57 36.2574706704 -49 46 50.094145848 7.66 8.36 8.33     B2II/III 49 0
24 V* V1259 Cen bC* 13 02 20.2591601376 -63 28 23.444471028   12.10 11.42 11.29   OB- 12 0
25 * alf Vir bC* 13 25 11.57937 -11 09 40.7501 -0.20 0.74 0.97 1.06 1.30 B1V 877 1
26 * nu. Cen bC* 13 49 30.2765077433 -41 41 15.750707249 2.31 3.188 3.386     B2V 213 0
27 V* V836 Cen bC* 14 46 25.7601403800 -37 13 20.082887904 7.04 7.88 8.05     B2 124 0
28 HD 133823 bC? 15 09 54.5953566408 -65 30 22.612602132 8.98 9.64 9.59     B3II 23 0
29 V* V349 Nor bC* 16 15 26.4194409792 -52 55 14.518386840 8.34 8.921 8.770     B2II/III 38 0
30 CD-50 10368 bC? 16 18 57.9251587872 -51 03 29.744082180 10.3 10.77 10.29 10.29   B2II 20 0
31 * sig Sco bC* 16 21 11.3157134 -25 35 34.051476 2.32 3.02 2.89 1.69 1.58 B1III+B1:V 898 0
32 HD 147985 bC? 16 26 56.7425350368 -43 47 57.155390448 7.45 8.03 7.92     B1/2II/III 35 0
33 HD 328862 bC? 16 44 08.8986364200 -47 19 04.486886580 9.89 10.40 10.18 10.20   B3 29 0
34 CPD-46 8213 * 16 46 30.2421031488 -47 01 10.392834792 11.03 11.44 10.89     ~ 12 1
35 HD 328906 bC? 16 49 38.6234223792 -44 31 41.185389756   12.34 11.25     B2 8 0
36 HD 152077 Pu* 16 53 13.9941030528 -43 44 57.962732496 8.74 9.83 9.45 9.62   B2Iab/b 33 0
37 NGC 6231 OpC 16 54 14.4 -41 48 53           ~ 562 0
38 HD 152477 Pu* 16 55 53.6490838344 -48 08 51.966884940 9.5 9.66 9.10 8.73 9.314 B1Ib 30 0
39 HD 155336 bC? 17 12 18.3554946312 -33 06 03.118922352 9.18 9.69 9.43 9.75   B1/2Ib 29 0
40 HD 156327 WR* 17 18 23.0613730 -34 24 30.630847 9.88 9.95 9.32 9.67   WC7+B0III 124 0
41 HD 156662 bC? 17 21 06.0895034592 -45 58 55.615119960 7.35 9.15 9.13 8.70   B2III 39 0
42 V* V2371 Oph bC* 17 24 34.8186518040 -26 55 29.006488236 9.33 9.61 9.07 9.59   B1/2Ib 34 0
43 HD 164340 bC* 18 02 32.9452043448 -40 05 16.419321528 8.2 9.16 9.25     B0/0.5(III) 46 0
44 HD 165582 bC? 18 08 07.5308918544 -34 34 32.356542576 8.58 9.56 9.74 9.88   B1Ib 26 0
45 V* V4382 Sgr bC* 18 08 44.9162594688 -22 09 38.446869420 7.2 7.93 7.94 8.86   B1/2II 47 0
46 V* V4159 Sgr bC* 18 11 47.6009546952 -16 53 38.165198028 7.57 8.29 8.16 9.01 8.703 B1Ib 52 0
47 HD 167743 V* 18 17 16.0871449272 -15 27 06.130469052   10.02 9.71     B2Ib 22 0
48 HD 168050 bC* 18 18 38.4896028552 -19 06 10.712669580   10.29 9.91     B3/5Ib 9 0
49 ASAS J182610-1704.3 EB* 18 26 10.3382552688 -17 04 20.761103568 10.38 10.70 10.17 10.18   OB- 11 0
50 LS IV -15 46 V* 18 26 16.9396739664 -15 15 42.816321504 10.65 11.09 10.64 10.74   OB 15 0
51 BD-14 5057 V* 18 27 25.8638508696 -14 42 07.923690288 10.17 10.54 10.09     B 13 0
52 HD 180642 bC* 19 17 14.8038514896 +01 03 33.904495728 7.83 8.47 8.29     B1.5II-III 107 0
53 V* V372 Sge bC* 20 09 39.5945322600 +21 04 43.634595144   8.26 8.34     B0.5III-IV 46 0
54 V* BW Vul bC* 20 54 22.3947588600 +28 31 19.190976132 5.47 6.40 6.54     B2IIIv 301 0
55 V* SY Equ bC* 21 23 28.8086293896 +09 55 54.920417808 7.37 8.33 8.53     B0.5IIIn 92 0
56 * bet Cep bC* 21 28 39.5968513 +70 33 38.574681 2.05 3.01 3.23 3.33 3.55 B0.5IIIs 756 0
57 V* HN Aqr bC* 22 37 38.2846689672 -18 39 51.268772880   11.293 11.426 11.813   B 70 0
58 * 12 Lac bC* 22 41 28.6495065456 +40 13 31.609736580 4.24 5.080 5.229     B1.5III 369 0
59 * 16 Lac bC* 22 56 23.6299283136 +41 36 13.948480440 4.61 5.436 5.587     B2IVs 325 0

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