2019AJ....157...29H

Query : 2019AJ....157...29H

2019AJ....157...29H - Astron. J., 157, 29-29 (2019/January-0)

Winds of massive stars: high-resolution X-ray spectra of stars in NGC 3603.

HUENEMOERDER D.P., SCHULZ N.S. and NICHOLS J.S.

Abstract (from CDS):

The cluster NGC 3603 hosts some of the most massive stars in the Galaxy. With a modest 50 ks exposure with the Chandra High Energy Grating Spectrometer, we have resolved emission lines in spectra of several of the brightest cluster members, which are of WNh and O spectral types. This observation provides our first definitive high-resolution spectra of such stars in this nearby starburst region. The stars studied have broadened X-ray emission lines, some with blueshifted centroids, and are characteristic of massive stellar winds with terminal velocities around 2000-3000kms–1. X-ray luminosities and plasma temperatures are very high for both the WNh and O-stars studied. We conclude that their X-rays are likely the result of colliding winds.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): stars: early-type - stars: massive - stars: winds, outflows - stars: Wolf-Rayet - X-rays: stars

Simbad objects: 21

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Number of rows : 21
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 Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
2 * tet01 Ori C SB* 05 35 16.4662967280 -05 23 22.921811880 4.20 5.15 5.13 4.91 4.73 O7Vp 1479 1
3 RMC 136 Cl* 05 38 42.396 -69 06 03.36   5.81 5.40     ~ 2236 2
4 RMC 136a Cl* 05 38 43.3 -69 06 08           ~ 158 2
5 HD 50896 WR* 06 54 13.0439608392 -23 55 42.023319852 5.74 6.63 6.91 7.74   WN4b 794 0
6 V* Z Pup Mi* 07 32 38.0640798624 -20 39 29.219695524   12.48 7.20 9.23   M4e 156 0
7 HD 93162 WR* 10 44 10.3890266112 -59 43 11.106500520 7.90 8.55 8.80 8.66   O2.5If*/WN6+OB 374 0
8 NGC 3603 OpC 11 14 57.9 -61 14 32           ~ 1136 1
9 Cl* NGC 3603 MTT 68 LP? 11 14 59.5001601864 -61 14 33.889242336   16.31 14.72 13.64 12.05 O2If 9 0
10 Cl* NGC 3603 BLW A2 * 11 15 07.31 -61 15 38.8   13.51 12.53     O3V 20 0
11 Cl* NGC 3603 BLW A1 WR* 11 15 07.31 -61 15 38.4   12.32 11.18     WN6h 73 0
12 HD 97950 Cl* 11 15 07.346 -61 15 38.52 9.64 9.83 9.03 9.69   ~ 198 2
13 Cl* NGC 3603 BLW A3 * 11 15 07.35 -61 15 38.4   14.07 12.95     O3III(f*) 21 0
14 Cl* NGC 3603 MDS B WR* 11 15 07.4080492426 -61 15 38.613880686   12.34 11.33     WN6h 44 0
15 Cl* NGC 3603 MDS C WR* 11 15 07.5851367565 -61 15 38.027795970   12.94 11.89     WN6h 49 0
16 NGC 3603 47 * 11 15 09.3526936584 -61 16 02.077865112 13.49 13.71 12.67     O4IV(f) 23 0
17 NGC 3603 4 PM* 11 15 21.3283045032 -61 15 04.418942004   16.17 14.61     O4III 11 0
18 HD 104994 WR* 12 05 18.7204232424 -62 03 10.140656832 9.95 10.94 10.93 11.03   WN3p-w 170 0
19 NAME Arches Cluster Cl* 17 45 50.5 -28 49 28           ~ 792 0
20 HD 193793 WR* 20 20 27.9757908696 +43 51 16.286840244 6.90 7.25 6.85 4.58   WC7pd+O5.5fc 754 0
21 HD 197406 WR* 20 41 21.5485520640 +52 35 15.142636896 10.42 10.87 10.30     WN8h+B3IV/BH 200 0

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