1997A&A...326..976B

Query : 1997A&A...326..976B

1997A&A...326..976B - Astronomy and Astrophysics, volume 326976-981 (1997/10-3)

Wolf-Rayet stars detected in five associations of NGC 300.

BREYSACHER J., AZZOPARDI M., TESTOR G. and MURATORIO G.

Abstract (from CDS):

A search for WR stars in five associations of the Sc galaxy NGC 300 has permitted to better locate, in crowded regions, some of the already known objects and to discover six new WR stars. The on-line/off-line imaging technique was applied using the SUperb Seeing Imager (SUSI) of the ESO New Technology Telescope (NTT) installed at La Silla, Chile. Of the twelve WR stars identified up to now in these associations, three remain to be definitely confirmed by slit spectroscopy, however they have detection significances ≥8σ and can therefore be considered bona fide WR stars. It is argued that after the present survey most, possibly all, of the WR stars contained in the associations studied have been discovered. The average ``O/WR'' ratio of 2.6±0.8 obtained from the comparison of the numbers of WR and zero-age-main-sequence O5 stars is well in the range of the values found for other galaxies, in particular M 33 generally considered as a twin of NGC 300.

Abstract Copyright: ∼

Journal keyword(s): galaxies: individual: NGC300, M33 - star clusters - stellar content stars: evolution - stars: Wolf-Rayet.

VizieR on-line data: <Available at CDS (J/A+A/326/976): >

Nomenclature: Table 1: [BAT97] R (Nos I-V). Table 2, col(2): [BAT97] I N (Nos 1-2), [BAT97] II N (Nos 1-2), [BAT97] III N (No. 1), [BAT97] IV N (Nos 1-3), [BAT97] V N (Nos 1-4).

Simbad objects: 27

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Number of rows : 27
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 STWR 9 WR* 00 54 49.9 -37 38 21   19.4       WCwn+ 5 0
2 [BAT97] I As* 00 54 50.1 -37 38 30           ~ 2 0
3 [BAT97] I 2 WR* 00 54 50.2 -37 38 23   21.4       WNE 4 0
4 [S66b] 39 HII 00 54 50.34 -37 38 22.6     17.24     ~ 16 2
5 [PFP2004] J005451.1-373826 HII 00 54 51.15 -37 38 22.8     18.01     ~ 10 1
6 NGC 300 GiG 00 54 53.4465638304 -37 41 03.168402396 8.83 8.69 8.13 7.46   ~ 1614 2
7 [BAT97] II 1 WR* 00 55 02.940 -37 43 15.96   22.0       WC 4 0
8 [BAT97] II As* 00 55 03.4 -37 43 16           ~ 2 0
9 STWR 12 WR* 00 55 03.410 -37 42 42.14   22.3       WC7 5 0
10 [BL97] N300-H18 SNR 00 55 03.50 -37 42 46.0     17.44     ~ 22 2
11 [DCL88] 119A SNR 00 55 03.74 -37 43 18.3     16.70     ~ 19 2
12 [BAT97] III As* 00 55 03.8 -37 42 47           ~ 2 0
13 STWR 7 WR* 00 55 04.170 -37 43 18.91   20.2       WN7 6 0
14 [BAT97] V 1 WR* 00 55 12.0 -37 41 34     21.69     WC 2 0
15 [BAT97] IV 1 WR* 00 55 12.0 -37 41 16   19.2       WN 2 0
16 [DCL88] 137D HII 00 55.2 -37 41           ~ 2 0
17 [BAT97] IV As* 00 55 12.1 -37 41 19           ~ 1 0
18 STWR 13 WR* 00 55 12.3 -37 41 19     21.87     WC 3 0
19 STWR 5 WR* 00 55 12.39 -37 41 30.2   20.6       WC4/5 4 0
20 STWR 4 WR* 00 55 12.63 -37 41 39.4   19.0       WN3/6 5 0
21 [DCL88] 137B HII 00 55 12.70 -37 41 23.1           ~ 9 0
22 [DRW83] NGC 300 14 HII 00 55 12.79 -37 41 37.0     16.84     ~ 20 2
23 [BAT97] V As* 00 55 12.8 -37 41 36           ~ 1 0
24 [BAT97] V 3 WR* 00 55 12.9 -37 41 36   21.5       WN 1 0
25 [BAT97] V 4 WR* 00 55 13.1 -37 41 42   22.2       WN 2 0
26 [DCL88] 137C HII 00 55 13.86 -37 41 36.9     15.34     ~ 10 0
27 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1

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