The unexpected ultraviolet variability of Herbig-Haro object 1

Details The unexpected ultraviolet variability of Herbig-Haro object 1 The unexpected ultraviolet variability of Herbig-Haro object 1

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...292l..75b&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 292, May 15, 1985, p. L75-L78.

Astronomy and Astrophysics

Astrophysics

18

Herbig-Haro Objects, Interstellar Matter, Shock Waves, Stellar Spectra, Ultraviolet Spectra, Carbon, Iue, Nebulae, Pre-Main Sequence Stars

Scientific paper

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.

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