Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....92..119r&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 92, July 1986, p. 119-124.
Astronomy and Astrophysics
Astronomy
26
Bow Waves, Herbig-Haro Objects, Shock Wave Propagation, Stellar Spectra, Emission Spectra, High Resolution, Interstellar Gas, Stellar Models
Scientific paper
Long-slit, high-resolution spectroscopy of the Herbig-Haro oject HH 32 has shown that the emission-line profiles in all four condensations A, B, C, and D show high- and low-velocity components. The spatial maxima of these two components are always arranged in a 'double-layer' pattern, with the maximum of the high-velocity component 0.6-1.0 arcsecs closer to the central star (AS 353A) than the low-velocity maximum. A study of the emission-line profiles predicted from a model of a radiating bow shock shows that such a double-layer structure appears naturally for this type of flow. In this case both the high-velocity and the low-velocity components come from the post-shock gas, in agreement with the theoretical prediction that it should be very difficult to detect the pre-shock gas observationally. The present results agree qualitatively well with observations of HH 32, strengthening the case for a bow-shock interpretation of this Herbig-Haro object. It is shown that the double-layer effect will be more easily observable for bow shocks which move at a relatively large angle with respect to the plane of the sky (i.e., for Herbig-Haro objects which have large radial velocities).
Bohm Karl-Heinz
Raga Alejandro C.
Solf Josef
No associations
LandOfFree
A new test of bow-shock models of Herbig-Haro objects does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A new test of bow-shock models of Herbig-Haro objects, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A new test of bow-shock models of Herbig-Haro objects will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1654634