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Title:
The peculiar object HD 44179 /'The red rectangle'/
Authors:
Cohen, M.; Anderson, C. M.; Cowley, A.; Coyne, G. V.; Fawley, W.; Gull, T. R.; Harlan, E. A.; Herbig, G. H.; Holden, F.; Hudson, H. S.; Jakoubek, R. O.; Johnson, H. M.; Merrill, K. M.; Schiffer, F. H.; Soifer, B. T.; Zuckerman, B.
Affiliation:
AA(California, University, Berkeley, Calif.), AB(California, University, Berkeley, Calif.), AC(Washburn Observatory, Madison, Wis.), AD(Dominion Astrophysical Observatory, Victoria, British Columbia, Canada), AE(Arizona, University, Tucson, Ariz.), AF(Kitt Peak National Observatory, Tucson, Ariz.), AG(Lick Observatory, Mount Hamilton, Calif.), AH(Lick Observatory, Mount Hamilton, Calif.), AI(Lick Observatory, Mount Hamilton, Calif.), AJ(California, University, San Diego, Calif.)
Publication:
Astrophysical Journal, vol. 196, Feb. 15, 1975, pt. 1, p. 179-189. (ApJ Homepage)
Publication Date:
02/1975
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL PHOTOGRAPHY, BINARY STARS, INFRARED ASTRONOMY, NEBULAE, STELLAR SPECTROPHOTOMETRY, ASTRONOMICAL PHOTOMETRY, INFRARED STARS, POLARIMETRY, RADIO ASTRONOMY, SKY SURVEYS (ASTRONOMY), UBV SPECTRA
Comment:
A&AA ID. AAA013.141.604
DOI:
10.1086/153403
Bibliographic Code:
1975ApJ...196..179C

Abstract

A strong infrared source detected in the AFCRL sky survey is confirmed, and is identified with the binary star HD 44179, embedded in a peculiar nebula. UBVRI and broad-band photometry between 2.2 and 27 microns are combined with blue, red, and near-infrared spectra, polarimetry and spectrophotometry of the star, and a range of direct and image-tube photographs of the nebula, to suggest a composite model of the system. In this model, the infrared radiation derives from thermal emission by dust grains contained in a disklike geometry about the central object, which appears to be of spectral type B9-A0 III and which may be in pre-main-sequence evolution. Two infrared emission features are found, peaking at 8.7 and 11.3 microns, the latter corresponding to the feature seen in the spectrum of the planetary nebula NGC 7027. The complex nebular structure is discussed on the basis of photographs through narrow-band continuum and emission-line filters. The polarization data support the suggestion of a disk containing some large particles. No radio continuum emission is detected.

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