2003A&A...403..605W


C.D.S. - SIMBAD4 rel 1.7 - 2020.04.05CEST21:50:26

2003A&A...403..605W - Astronomy and Astrophysics, volume 403, 605-611 (2003/5-4)

The RCW 114 nebula: An old supernova remnant or a WR wind-blown bubble?

WELSH B.Y., SALLMEN S., JELINSKY S. and LALLEMENT R.

Abstract (from CDS):

We present medium resolution spectra (R∼7km/s) of the interstellar NaI D1 & D2 absorption lines observed towards 7 early-type stars with distances ranging from 221 to ∼1.5kpc in the line-of-sight to the RCW 114 nebula. Our observed pattern of absorption is in conflict with the findings of Bedford et al. (1984MNRAS.210..693B) who placed an upper limit to the distance to this nebula of <200pc. Instead, our spectral data are consistent with a marked increase in NaI absorption complexity occuring only for sight-lines with distances >1kpc. A similar pattern of absorption behavior is seen for the SiII λ1304Å interstellar line observed in the ultraviolet towards four of the aforementioned stars. We propose a scenario in which the absorption components with velocities ←10km/s seen towards RCW 114 are caused by an expanding stellar wind-blown bubble associated with the Wolf-Rayet (WR) star, HD 156385 (d∼1.5kpc), and that the Hα and [SII] nebular emission probably arises in shocked filamentary gas associated with a pre-existing evolved supernova remnant cavity produced by the high-mass progenitor of the present WR star.

Abstract Copyright:

Journal keyword(s): ISM: bubbles - ISM: supernova remnants

Status at CDS:  

Simbad objects: 8

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Number of rows : 8

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 HD 156385 WR* 17 19 29.9012727857 -45 38 23.874796927 6.55 6.97 6.92 8.11   WC7 151 0
2 HD 156575 * 17 20 37.6187508445 -46 02 46.445303227 6.91 9.43 8.99 8.65   B1Ib/II 32 0
3 * iot Ara Be* 17 23 16.0749238495 -47 28 05.514575023 4.32 5.14 5.25 5.12 5.20 B2(V)nne 135 0
4 HD 157243 * 17 24 13.0872972 -44 09 45.273534 4.66 5.039 5.108     B5/6III 57 0
5 SNR G343.0-06.0 SNR 17 25.0 -46 30           ~ 25 0
6 HD 157698 * 17 27 03.5734532295 -47 08 11.519165765 6.62 7.087 7.151     B7III 25 0
7 HD 157832 Be* 17 27 54.8113464489 -47 01 34.399141463 5.81 6.636 6.663     B2ne 52 1
8 HD 158042 ** 17 29 00.86267 -43 58 26.1072 5.8 6.245 6.291     B5III 31 0

    Equat.    Gal    SGal    Ecl

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2020.04.05-21:50:26

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