Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...290..261c&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 290, March 1, 1985, p. 261-272. NSF-supported research.
Astronomy and Astrophysics
Astrophysics
80
Astronomical Spectroscopy, Brightness Distribution, Infrared Spectra, Polarimetry, Reflection Nebulae, Stellar Magnitude, Astronomical Maps, Astronomical Models, Hertzsprung-Russell Diagram, Hubble Diagram, Molecular Clouds, Optical Thickness, Surface Properties
Scientific paper
Surface brightness maps at I', H, K, L, and N, and polarimetric images at K and H of the object GSS 30 in the Ophiuchus dark cloud were made with the 2.3 m Wyoming infrared telescope. The images show that GSS 30 is a bi-lobed asymmetric reflection nebula detectable at H, K, and L. At H the nebulosity extends 22arcsec along the major axis, and the illuminating star has a magnitude of 11.17; at K it extends 45arcsec along the major axis, and the illuminating star has a magnitude of 8.88. A model is presented in which an accretion disk is seen nearly edge-on obscuring a star and polar reflection lobes. Density profiles and grain characteristics of the reflection nebula are briefly discussed.
Castelaz Michael W.
Gehrz Robert D.
Grasdalen Gary L.
Gullixson Craig
Hackwell John A.
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