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| Paper: |
The Interstellar Medium Around 41 New Wolf-Rayet Stars in the Inner Galaxy |
| Volume: |
438, The Dynamic Interstellar Medium: A Celebration of the Canadian Galactic Plane Survey |
| Page: |
335 |
| Authors: |
Pineault, S.; Gonzalez Moreno, J. A. |
| Abstract: |
Wolf-Rayet (WR) and Of stars are massive stars displaying the most
powerful stellar winds, both in terms of mass-loss rate and wind velocity
(Lozinskaya 1992). At radio frequencies, the CGPS (Taylor et al. 2003) has made
it possible to study the interstellar
environment of a large number of these stars, all visible from the
northern hemisphere. In a recent near-infrared survey of the inner Galactic
plane, Shara et al. (2009) identified 41 new WR stars, 15 of type WN and
26 of type WC. We have used the SGPS (Haverkorn et al. 2006)
and VGPS (Stil et al. 2006) to search for evidence
of large-scale structures around these new WR stars. Using the radio
continuum data, we have found six structures of interest.
Three of these are previously known supernova remnants (SNR). With
the help of the Molonglo survey (Green et al. 1999), we have
carried out an analysis of the radio spectrum of these six objects in
order to determine the thermal or non-thermal nature of the emission.
Of the three new objects, two were bright enough for their spectral
index to be determined: one is a new SNR and the other one is a compact
shell displaying thermal emission. The 21 cm line data cube
is currently under study in an attempt to look for associated neutral
hydrogen. |
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