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The ultraviolet continuum and the fluorescent H2 lines in low-excitation Herbig-Haro objectsLong-exposure IUE observations are used here to determine the spatial distribution of the fluorescent H2 line emission in the low-excitation objects HH 43 and HH 47. In HH 43, the spatial distribution of the fluorescent H2 line emission has a width equal to or smaller than the width of the point-spread function of IUE, while both the short-wavelength UV continuum and the optical forbidden S II lines show distributions which are wider by more than a factor of two. In HH 47, the results are qualitatively analogous, but the differences between the fluorescent HH 23 emission distribution on the one hand, and the UV continuum and optical forbidden S II distribution on the other, are smaller. These distributions indicate that the appropriate conditions for the formation of fluorscent H2 lines are fulfilled only in rather narrow regions for these low-excitation objects. A continuous energy distribution in HH 43 and HH 47 is found which differs only slightly from that in the high-excitation objects HH 1 and HH 2.
Document ID
19910048300
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Boehm, K. H.
(Washington Univ. Seattle, WA, United States)
Scott, D. M.
(Washington, University Seattle, United States)
Solf, J.
(Max-Planck-Institut fuer Astronomie Heidelberg, Federal Republic of Germany, United States)
Date Acquired
August 14, 2013
Publication Date
April 10, 1991
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 371
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
91A32923
Funding Number(s)
CONTRACT_GRANT: NSF AST-89-18458
CONTRACT_GRANT: NAS5-28731
CONTRACT_GRANT: NSF AST-87-17867
CONTRACT_GRANT: NAG5-45
Distribution Limits
Public
Copyright
Other

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