Table 1
Stellar and nebular parameters for the WR nebulae observed with modern X-ray satellites.
| Star | WR nebula | Distancea | WR typea | v∞a | Radiusb | NHc | Sc | LXc | |
|
|
|||||||||
| (kpc) | (km s-1) | (arcmin) | (pc) | (× 1021 cm-2) | (erg cm-2 s-1 arcmin-2) | (× 1033 erg s-1) | |||
|
|
|||||||||
| WR 6 | S 308 | 1.5 | WN4 | 1800 | 20 | 8.8 | 0.62–1.1 | 3.5 × 10-15 | 2 |
| WR 16 | 2.37 | WN8h | 630 | 4.3 | 3 | 4.1 | <5.4 × 10-16 | <0.8 | |
| WR 40 | RCW 58 | 2.26 | WN8h | 840 | 4.9 | 3.2 | 5 | <2.2 × 10-15 | <6.5 |
| WR 136 | NGC 6888 | 1.26 | WN6 | 1750 | 8.6 | 3.2 | 3.1 | 1.2 × 10-14 | 3.5 |
Notes.
Distance, spectral type, and stellar wind velocity taken from van der Hucht (2001), except for the distance of WR 6 that was taken from the kinematic distance estimated by Chu et al. (2003).
Column density taken from Toalá et al. (2012) for S 308, Gosset et al. (2005) for RCW 58, and Zhekov & Park (2011) for NGC 6888. The observed X-ray surface brightness and luminosity of these sources have been scaled from these references to the distances used here and extended to the 0.3–1.5 keV energy range in all cases for consistency.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.