A Mid-Infrared Spectral Survey of Galactic Wolf-Rayet Stars

Astronomy and Astrophysics – Astronomy

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

17

Infrared Radiation, Stars: Wolf-Rayet, Techniques: Spectroscopic

Scientific paper

We present 8-13 μm spectra at resolution R~600 of 29 northern Galactic Wolf-Rayet stars, including the first ever reported mid-infrared (MIR) spectrum for many. Among the subtypes of the stars studied were 14 WC, 13 WN, 1 WN/WC, and an additional reclassified WN. Lines of He I and He II, along with fine-structure lines of Ne II and S IV, are strongly present in 22 of the sources observed, while six of the sources exhibit the powerful emission of heated circumstellar carbon dust. We point out similarities between our spectra and Infrared Space Observatory (ISO) observations of several of the same sources and note an unresolved discrepancy between the two data sets for the WC6 star WR 146. We investigate the diagnostic power of MIR He I and He II lines for subtype discrimination and find the line ratio Wλ(9.7 μm He II)/Wλ(11.3 μm He I+He II) can provide moderate discrimination within the WN and WC types, though the small number of stars with corresponding line pairs detected made such assessment difficult.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

A Mid-Infrared Spectral Survey of Galactic Wolf-Rayet Stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A Mid-Infrared Spectral Survey of Galactic Wolf-Rayet Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Mid-Infrared Spectral Survey of Galactic Wolf-Rayet Stars will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1183614

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.