The H2 velocity field in Herbig-Haro 7-11

Details The H2 velocity field in Herbig-Haro 7-11 The H2 velocity field in Herbig-Haro 7-11

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...406..553c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 406, no. 2, p. 553-562.

Astronomy and Astrophysics

Astronomy

42

Bow Waves, Herbig-Haro Objects, Hydrogen, Infrared Astronomy, Shock Waves, Velocity Distribution, Alignment, Emission Spectra, Fabry-Perot Interferometers

Scientific paper

The study reports Fabry-Perot images of the H2 1-0 S(1) emission line in Herbig-Haro 7-11 obtained with a velocity resolution of 25 km/s and a spatial resolution of 1.2 arcsec. The H2 line profiles peak at lower (absolute) radial velocity than the atomic lines and have smaller line widths (FWHM). In the vicinity of HH 11, the velocity extent of the H2 emission is greater than 200 km/s. It is suggested that the weak emission near HH 11 may be produced by H2 reformation pumping in fast shocks and that the extremely high velocity CO observed in the same region could have a similar origin. The H2 emission in HH7 has the velocity field expected for a radiating bow shock, with strong H2 emission at the apex of the bow shock.

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