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Title:
GSS 30 - an infrared reflection nebula in the Ophiuchus dark cloud [ Erratum: 1986ApJ...301..502C ]
Authors:
Castelaz, M. W.; Hackwell, J. A.; Grasdalen, G. L.; Gehrz, R. D.; Gullixson, C.
Affiliation:
AA(Wyoming, University, Laramie, WY), AB(Wyoming, University, Laramie, WY), AC(Wyoming, University, Laramie, WY), AD(Wyoming, University, Laramie, WY), AE(Wyoming, University, Laramie, WY)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 290, March 1, 1985, p. 261-272. NSF-supported research. (ApJ Homepage)
Publication Date:
03/1985
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
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
DOI:
10.1086/162980
Bibliographic Code:
1985ApJ...290..261C

Abstract

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.

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