Spectroscopic and polarimetric observations of NGC 1333 and the surrounding dark cloud complex.
Abstract
Spectroscopy and polarimetry of several very red stars, noted on Near Infrared Photographic Sky Survey photographs in the region of NGC 1333, have yielded a 'map' suggesting the extent of polarization arising from a two-cloud structure in the region. Spectral types and color indices of the stars make it possible to infer that grain radii in the clouds exceed typical interstellar medium values and, further, that they increase with optical depth into the cloud. The present observations indicate that the cloud structure is far more extensive than previously realized.
- Publication:
-
The Astronomical Journal
- Pub Date:
- December 1980
- DOI:
- 10.1086/112842
- Bibcode:
- 1980AJ.....85.1638T
- Keywords:
-
- Cosmic Dust;
- Interstellar Matter;
- Polarimetry;
- Stellar Spectrophotometry;
- Emission Spectra;
- H Alpha Line;
- H Beta Line;
- Histograms;
- Interstellar Magnetic Fields;
- Late Stars;
- Polarized Light;
- Sky Surveys (Astronomy);
- Star Distribution;
- Astrophysics