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The unexpected ultraviolet variability of Herbig-Haro object 1 (1985)

Bohm, K. H. ; Shull, J. M. ; Bohm-Vitense, E. ; [et al.]

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Publication Date: 2019-06-28

Description: The line fluxes of the C IV 1550 A and semiforbidden C III 1909 A emission lines in HH 1 are noted to have monotonically decreased by factors of 4-6 between 1979 and 1983, despite a lack of indications of optical range changes. The thickness of the shocked layers and preshock density can be estimated on the basis of these rapid changes, with results suggesting a clumpy medium that leads to truncated shock waves with column densities insufficient for the development of complete recombination zones.

Keywords: ASTROPHYSICS

Type: Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X); 292; L75-L78

Format: text

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