Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aj....112..235i&link_type=abstract
Astronomical Journal v.112, p.235
Astronomy and Astrophysics
Astronomy
22
Infrared: Stars, Ism: Molecules
Scientific paper
Near Infrared spectroscopic observations of highly reddened stars in the Galactic Plane compiled by Stephenson [AJ, 103,263 (1992)] are presented. We observed nine highly reddened stars and detected the 3.4 μm absorption feature in the spectra of five stars. The 3.4 μm absorption depth and the visual extinction show a positive correlation. The observed strength of this feature is τ3.4/Av˜0.003, similar to previous results by Pendleton et al. [ApJ, 437, 683 (1994)] for lines of sight other than the Galactic Center. One star shows the 3.1 μm absorption feature which is probably of molecular cloud origin, but no 3. absorption feature. This is consistent with Brooke et al. [ApJ, 459, 209 (1996)] who find that the spectra of objects embedded in or located behind molecular cloud material consistently show a 3.1 μm ice band, but never show a 3.4 μm band which resembles the diffuse interstellar medium band. These results support the hypothesis that the 3.4 μm absorption feature is caused by organic materials ubiquitously distributed in the diffuse interstellar medium. Although these stars were originally selected from an I band objective prism survey for the absence of molecular features in their spectra, we detected the CO absorption feature near 2.3 μm in all nine stars we observed. Consequently, these stars are likely to be moderately to highly reddened stars of late spectral type.
Goto Miwa
Imanishi Masatoshi
Jones Terry Jay
Kobayashi Naoto
Nagata Tetsuya
No associations
LandOfFree
Near Infrared Spectroscopy of Highly Reddened Stars in the Galactic Plane 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 Near Infrared Spectroscopy of Highly Reddened Stars in the Galactic Plane, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Near Infrared Spectroscopy of Highly Reddened Stars in the Galactic Plane will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1116173