2013A&A...559A..52T


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.10CEST02:02:38

2013A&A...559A..52T - Astronomy and Astrophysics, volume 559A, 52-52 (2013/11-1)

Absence of hot gas within the Wolf-Rayet bubble around WR 16.

TOALA J.A. and GUERRERO M.A.

Abstract (from CDS):

We present the analysis of XMM-Newton archival observations towards the Wolf-Rayet (WR) bubble around WR16. Despite the closed bubble morphology of this WR nebula, the XMM-Newton observations show no evidence of diffuse emission in its interior as in the similar WR bubbles NGC6888 and S308. We use the present observations to estimate a 3-σ upper limit to the X-ray luminosity in the 0.3-1.5keV energy band equal to 7.4x1032erg/s for the diffuse emission from the WR nebula, assuming a distance of 2.37kpc. The WR nebula around WR16 is the fourth observed by the current generation of X-ray satellites and the second not detected. We also examine FUSE spectra to search for nebular O vi absorption lines in the stellar continuum of WR16. The present far-UV data and the lack of measurements of the dynamics of the optical WR bubble do not allow us to confirm the existence of a conductive layer of gas at T∼3x105K between the cold nebular gas and the hot gas in its interior. The present observations result in an upper limit of ne<0.6cm–3 on the electron density of the X-ray emitting material within the nebula.

Abstract Copyright:

Journal keyword(s): circumstellar matter - stars: massive - stars: Wolf-Rayet - ISM: bubbles - pulsars: individual: WR16

Simbad objects: 6

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Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5669 1
2 HD 50896 WR* 06 54 13.0440847499 -23 55 42.020318514 5.74 6.63 6.91 7.74   WN4b 736 0
3 HD 86161 WR* 09 54 52.9034376427 -57 43 38.273623332 7.94 8.65 8.36 8.93   WN8h 202 0
4 HD 96548 WR* 11 06 17.2033098417 -65 30 35.237611013 7.10 7.80 7.70 8.49   WN8h 388 0
5 HD 192163 WR* 20 12 06.5420067895 +38 21 17.783840972 7.12 7.49 7.50     WN6(h)-s 517 0
6 NGC 6888 ISM 20 12 07 +38 21.3   7.44       WN6b(h) 257 1

    Equat.    Gal    SGal    Ecl

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2020.07.10-02:02:38

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