2002A&A...383L..31B


Query : 2002A&A...383L..31B

2002A&A...383L..31B - Astronomy and Astrophysics, volume 383, L31-34 (2002/3-1)

A spectroscopic search for variability of Be stars in the SMC.

BAADE D., RIVINIUS T., STEFL S. and KAUFER A.

Abstract (from CDS):

Two low-vsin(i) early-type Be stars in the area of the young cluster NGC 330 in the Small Magellanic Cloud (SMC) were monitored with the VLT and the UVES echelle spectrograph during 8 consecutive nights. Exposure times between 45 and 60 min yielded a signal-to-noise ratio of about 80. The temporal variance in the line profiles does not significantly differ from the one of the continuum in both sets of about two dozen spectra. Four more stars were observed only once or twice; their line profiles, too, were not asymmetric. This is in marked contrast to the Galaxy, where short-term line profile variability would normally have been detected with high probability in at least one out of any two randomly selected Be stars of early spectral sub-class and low vsini. Some possible repercussions on the understanding of the Be phenomenon are briefly discussed.

Abstract Copyright:

Journal keyword(s): stars: emission-line, Be - stars: variable: general - galaxies: individual: SMC

Simbad objects: 12

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Number of rows : 12
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10314 1
2 Cl* NGC 330 ARP 5 * 00 56 10.6600422240 -72 28 10.411755132 13.94 14.74 14.85 15.425 15.08 B2II 19 0
3 Cl* NGC 330 ARP 44 Be* 00 56 12.1320541032 -72 27 17.073630432 14.24 15.15 15.21   15.18 B2III 15 0
4 Cl* NGC 330 ARP 7 Pu* 00 56 17.7291515496 -72 28 32.536424928   15.54 15.60   15.554 ~ 11 0
5 OGLE SMC-SC7 205947 Be* 00 56 18.1441803648 -72 27 13.655282940 14.58 15.45 15.51   15.49 B2IV 14 0
6 NGC 330 Cl* 00 56 20.59 -72 27 12.5 9.37 9.76 9.55   8.89 ~ 387 0
7 Cl* NGC 330 ARP 27 Be* 00 56 25.4613952176 -72 27 07.167806172 14.38 15.32 15.36   15.34 B2III 21 0
8 Cl* NGC 330 ROB B5 Be* 00 56 31.1608391376 -72 27 58.053588156 14.53 15.36 15.45   15.34 B3III 20 0
9 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16153 1
10 * ome CMa Be* 07 14 48.6538664 -26 46 21.609714 2.90 3.64 3.82 3.80 3.90 B2.5Ve 341 0
11 * mu. Cen Be* 13 49 36.9886294 -42 28 25.429594 2.37 3.27 3.43 3.41 3.50 B2Vnpe 423 0
12 HD 120991 Be* 13 53 57.2397645360 -47 07 41.390612184 5.11 6.03 6.10 6.24 6.34 B2Ve 132 0

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2022.08.10-08:07:21

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