Detection of the unusual 3.5 mu m feature in the Herbig Be star MWC 297

Details Detection of the unusual 3.5 mu m feature in the Herbig Be star MWC 297 Detection of the unusual 3.5 mu m feature in the Herbig Be star MWC 297

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...377..994t&link_type=abstract

Astronomy and Astrophysics, v.377, p.994-998 (2001)

Astronomy and Astrophysics

Astrophysics

6

Infrared: Stars, Ism Dust, Stars: Individual: Mwc 297, Stars: Circumstellar Matter

Scientific paper

We present spectroscopic observations of MWC 297 with medium spectral resolution in the 2.1-4.1 mu m region, that show the unusual emission band at 3.53 mu m as well as gaseous emission lines of the Brackett, Pfund and Humphrey series of hydrogen. A unique aspect of the measured 3.53 mu m emission band is the fact that, within our detection limit, it is not accompanied by the 3.3 and 3.4 mu m emission band. We suggest that the 3.53 mu m feature could be emitted by highly dehydrogenized carbonaceous dust particles that were processed under the influence of the strong radiation field of the central star.

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