Skip to main content Accessibility help
×
Home

MERLIN observations of WR 147 (WN8(h)+B0.5V)

  • Sarah K. Watson (a1), Richard J. Davis (a1) and Peredur M. Williams (a2)

Extract

WR147 was first discovered to be a strong radio, X-ray and infra-red emission source by Caillault et al. (1985). It was classified as a WN8 type star with a very large mass loss rate and unusual radio emission (α < 0) for a thermal source. This unusual behaviour was explained by MERLIN (Moran et al. 1989) and VLA (Churchwell et al. 1992) observations in which it was resolved into two components: a ‘thermal’ source associated with the Wolf-Rayet star and a non-thermal component ∼ 600 mas to the north. Churchwell et al. showed that the southern component had the expected spectral index of α ≃ 0.6 for free-free emission from a stellar wind. They also showed that the northern component had a spectral index of α ≃ −0.5 and was therefore a non-thermal source, now thought to be due to a colliding wind region.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      MERLIN observations of WR 147 (WN8(h)+B0.5V)
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      MERLIN observations of WR 147 (WN8(h)+B0.5V)
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      MERLIN observations of WR 147 (WN8(h)+B0.5V)
      Available formats
      ×

Copyright

References

Hide All
Caillault, J.-P., Chanan, G.A., Helfand, D.J., et al. 1985, Nature 313, 376
Churchwell, E.B, Bieging, J.H., van der Hucht, K.A., Williams, P.M., et al. 1992, ApJ 393, 329
Moran, J.P., Davis, R.J., Spencer, R.E., Bode, M.F., et al. 1989, Nature 340, 449
Niemela, V.S, Shara, M.M., Wallace, D.J., Zurek, D.R., et al. 1998, AJ 115, 2047
Williams, P.M., Dougherty, S.M., Davis, R.J., van der Hucht, K.A., et al. 1997, MNRAS 289, 10

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed