1998A&A...340..397K


Query : 1998A&A...340..397K

1998A&A...340..397K - Astronomy and Astrophysics, volume 340397-401 (1998/12-2)

Spectroscopy of Be stars in the Small Magellanic Cloud cluster NGC 330.

KELLER S.C. and BESSELL M.S.

Abstract (from CDS):

The presence of an anomalously large population of Be stars in the young cluster NGC 330 in the SMC has been noted by Feast (1972MNRAS.159..113F), Bessell & Wood (1992, Lecture Notes in Physics 416, 271), Grebel (1992A&A...254L...5G) and most recently Keller et al. (1999A&AS..134..489K). We present results from follow-up medium resolution spectra of the bright Be stars identified in Keller et al. (1998, A&AS, in press) and in the spectroscopic study of Mazzali et al. (1996A&A...316..173M) We find that the study of Mazzali et al. has overestimated the number of Be stars within NGC 330. Many of the bright B type stars identified by Mazzali et al. as Be stars show no signs of emission after correction for the diffuse HII emission pervading the cluster field. In the study of Mazzali et al. (1996A&A...316..173M) evidence is presented suggesting that all Be stars in NGC 330 have a common inclination of their rotation axes to the line of sight. For our sample of Be stars we present the emission equivalent widths and observed rotational velocities. An examination of these quantities shows that there is no evidence of a preferential alignment of the rotational axes, rather we are observing a population with random rotational axis alignment and dis k size.

Abstract Copyright: ∼

Journal keyword(s): stars: emission-line, Be - galaxies: individual: SMC - galaxies: star clusters

Simbad objects: 31

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Number of rows : 31
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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 SV* HV 1669 EB* 00 55 54.4552210944 -72 28 08.770435140   15.12 14.97 15.19 15.212 B1IVe 26 0
3 Cl* NGC 330 ELS 123 * 00 56 03.70 -72 27 12.8   15.57 15.79   15.945 O9.5V 18 0
4 Cl* NGC 330 ARP 46 Em* 00 56 06.6504303432 -72 27 36.331899660   14.36 14.47 14.489 14.213 B1/B2II/IIIe 20 1
5 Cl* NGC 330 ROB B28 * 00 56 06.80 -72 28 34.9   15.52 15.71   15.997 B0Ve 7 0
6 LIN 298 Em* 00 56 07.1887075536 -72 28 13.823874444 12.85 13.44 13.43   13.230 B2III 18 0
7 Cl* NGC 330 ARP 3 * 00 56 09.4059802800 -72 27 58.864347972 13.33 14.09 14.22 14.568 14.36 B1II 29 0
8 Cl* NGC 330 ARP 2 EB* 00 56 09.4223722008 -72 28 09.469886916 15.07 15.23 14.28   13.13 K:II 30 0
9 Cl* NGC 330 ARP 45 s*b 00 56 10.0781111880 -72 27 32.553003924 13.2 14.15 14.29   14.444 B2IIe 26 0
10 Cl* NGC 330 ARP 4 * 00 56 10.6421166953 -72 28 13.713380885 14.7 15.66 15.82   16.014 B3 8 0
11 Cl* NGC 330 ARP 5 * 00 56 10.6600422240 -72 28 10.411755132 13.94 14.74 14.85 15.425 15.08 B2II 23 0
12 Cl* NGC 330 ARP 44 Be* 00 56 12.1320541032 -72 27 17.073630432 14.24 15.15 15.21   15.18 B2III 16 0
13 Cl* NGC 330 ARP 6 Be* 00 56 14.25 -72 28 30.0 14.94 15.81 15.90   15.82 B3III 18 0
14 LIN 303 Be* 00 56 14.9103329712 -72 28 47.666698428 14.41 15.28 15.35   15.29 B3II-III 18 0
15 Cl* NGC 330 KWBBE 235 Be* 00 56 16.0601059461 -72 27 59.129429273 14.8 15.60 15.76   15.711 B6e 13 0
16 Cl* NGC 330 ARP 7 Pu* 00 56 17.7291515496 -72 28 32.536424928   15.54 15.60   15.554 ~ 12 0
17 Cl* NGC 330 ARP 31 * 00 56 17.8429238712 -72 27 27.489080556   14.39 14.54 14.802 14.639 B2.5IIe 10 0
18 OGLE SMC-SC7 205947 Be* 00 56 18.1441803648 -72 27 13.655282940 14.58 15.45 15.51   15.49 B2IV 15 0
19 NGC 330 Cl* 00 56 18.55 -72 27 45.1 9.37 9.76 9.55   8.89 ~ 445 0
20 Cl* NGC 330 ARP III-222 Be? 00 56 18.5605819920 -72 26 45.343356468 13.80 13.92 13.98   13.71 A2II 16 0
21 Cl* NGC 330 ARP 28 Em* 00 56 20.1817386096 -72 27 02.160476712 14.68 15.53 15.73   15.90 B2III 17 0
22 Cl* NGC 330 ARP 9 sg* 00 56 22.5754411848 -72 28 35.812965036 11.903 12.474 12.366   12.27 A5I 24 0
23 Cl* NGC 330 ARP 15 Be* 00 56 23.0340876720 -72 27 54.067829184 14.06 15.06 14.98   15.24 B2III 16 0
24 Cl* NGC 330 ARP 14 s*b 00 56 24.8626714248 -72 27 41.928918516 12.07 12.85 12.93   12.972 B3Ib 26 0
25 Cl* NGC 330 ARP 27 Be* 00 56 25.4613952176 -72 27 07.167806172 14.38 15.32 15.36   15.34 B2III 22 0
26 Cl* NGC 330 ARP 13 * 00 56 25.8972816504 -72 27 53.471397096   14.52 14.71 14.967 14.883 B0.5Ve 20 0
27 Cl* NGC 330 ROB B11 * 00 56 28.6397409864 -72 26 45.918068388 15.30 15.51 15.48   15.46 A0III 9 0
28 Cl* NGC 330 ROB B4 * 00 56 30.9111011232 -72 28 19.264922580   15.41 15.58   15.769 B1.5IVe 12 0
29 Cl* NGC 330 ROB B5 Be* 00 56 31.1608391376 -72 27 58.053588156 14.53 15.36 15.45   15.34 B3III 21 0
30 Cl* NGC 330 ROB B6 Be* 00 56 32.2789984224 -72 27 50.302399032   15.44 17.45   15.32 B1III 20 0
31 Cl* NGC 330 ROB B7 * 00 56 32.4826263120 -72 27 38.362583628   15.53 15.69   15.863 B2III/IVe 7 0

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