VLA observations of high-velocity H I associated with the Herbig-Haro objects 7-11

Details VLA observations of high-velocity H I associated with the Herbig-Haro objects 7-11 VLA observations of high-velocity H I associated with the Herbig-Haro objects 7-11

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...365..261r&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 365, Dec. 10, 1990, p. 261-268. Research supported by the Universidad Nacio

Astronomy and Astrophysics

Astrophysics

37

Emission Spectra, H I Regions, Herbig-Haro Objects, Stellar Winds, Hyperfine Structure, Reflection Nebulae, Very Large Array (Vla)

Scientific paper

The continuum and H I emission from the HH 7-11 region has been observed with the VLA at 21 cm. A total of 58 sources are detected in the region in the continuum, most of them background objects. Several of these sources are almost certainly associated with the HH 7-11 region, and their nature is discussed. At the velocity of the ambient cloud, H I emission regions around SVS 3 and BD + 30 549 deg are detected which are the illuminating stars of NGC 1333, the reflection nebula to the northeast of HH 7-11. It is suggested that these zones are photodissociated H I regions. The H I emission at + or - 20 km/s maps two apparently independent bipolar outflows associated with HH 7-11 and with HH 12. At higher velocities, the high-velocity bipolar H I emission associated with HH 7-11 can still be detected. The 40 km/s redshifted H I emission is more compact than the 20 km/s redshifted H I emission, as expected for a decelerating outflow.

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