2001PASP..113..697B

Query : 2001PASP..113..697B

2001PASP..113..697B - Publ. Astron. Soc. Pac., 113, 697-702 (2001/June-0)

Spectroscopy of massive stars in NGC 6822 and M33.

BIANCHI L., CATANZARO G., SCUDERI S. and HUTCHINGS J.B.

Abstract (from CDS):

We present blue spectra of massive stars in the Local Group galaxies NGC 6822 and M33. For all the targets, selected from our previous Hubble Space Telescope WFPC2 photometry, no previous spectroscopic studies exist, to our knowledge, except for a bright Wolf-Rayet star in NGC 6822. Photospheric parameters Teff and gravity are derived by a model fit of the Balmer lines and multiband (UV to optical) photometry combined and are compared with evolutionary models. Inferred masses range from ~7 to ~40 M☉ in the sample. From the spectroscopy, we classify the Wolf-Rayet star in NGC 6822 as WN3(-4), with no hydrogen. We estimate its progenitor mass of ~40±10 M☉. For two stars in the NGC 6822 sample, our data are not sufficient to establish whether they are foreground stars toward NGC 6822 or they belong to the galaxy.

Abstract Copyright: ∼

Journal keyword(s): galaxies: individual (NGC 6822, M33) - Stars: Atmospheres - Stars: Early-Type - Stars: Fundamental Parameters - Stars: Wolf-Rayet

Nomenclature: Table 2: [BCS2001] M33-NNNN N=7.

Simbad objects: 23

goto Full paper

goto View the references in ADS

Number of rows : 23
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 [BCS2001] M33-4204 * 01 33 28.9 +30 33 23   19.36 19.29     ~ 1 0
3 [BCS2001] M33-485 * 01 33 31.9 +30 39 23   22.06 22.16     ~ 1 0
4 [RW93] Star 117 * 01 33 50.2 +30 32 26   18.60 18.63     ~ 5 0
5 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
6 [BCS2001] M33-2337 * 01 33 51.1 +30 39 01   18.84 18.96     ~ 1 0
7 [BCS2001] M33-2417 * 01 33 51.8 +30 39 32   18.67 18.78     ~ 1 0
8 [BCS2001] M33-1407 * 01 33 52.2 +30 39 59   19.30 19.38     ~ 1 0
9 [BCS2001] M33-2979 * 01 33 56.0 +30 31 27   19.34 19.57     ~ 1 0
10 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
11 [BSM2001] LB-f1-739 * 19 44 48.830 -14 43 59.13   19.15 19.08     ~ 2 0
12 [BSM2001] LB-f1-156 * 19 44 49.7886460752 -14 45 39.469620996   19.58 19.44     ~ 2 0
13 [BSM2001] LB-f1-68 * 19 44 51.660 -14 45 00.61   19.80 19.67     ~ 2 0
14 [BSM2001] LB-f1-282 * 19 44 52.4262176136 -14 44 30.296802264   19.25 19.08     ~ 2 0
15 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1661 0
16 [BSM2001] CTIO-1761 * 19 45 08.3703488208 -14 44 47.109445080   17.95 17.05     ~ 2 0
17 [BSM2001] LB-f2-131 * 19 45 08.4993519912 -14 43 58.993855068   20.58 20.33     ~ 2 0
18 [BSM2001] CTIO-709 * 19 45 09.4791897816 -14 45 21.546110664   19.02 17.89     ~ 2 0
19 [BSM2001] LB-f2-90 * 19 45 12.0080511624 -14 45 26.202655152   17.86 16.80     ~ 2 0
20 [BSM2001] CTIO-931 * 19 45 12.2301409344 -14 43 17.992936704   17.84 16.86     ~ 2 0
21 [BSM2001] LB-f2-75 * 19 45 13.560 -14 45 12.66   18.93 18.82     ~ 2 0
22 [BSM2001] LB-f2-117 * 19 45 13.6352533560 -14 43 44.428984644   20.41 19.42     ~ 2 0
23 [BSM2001] CTIO-897 * 19 45 16.611 -14 43 37.51   19.71 18.89     ~ 2 0

To bookmark this query, right click on this link: simbad:objects in 2001PASP..113..697B and select 'bookmark this link' or equivalent in the popup menu