Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...19112107s&link_type=abstract
American Astronomical Society, 191st AAS Meeting, #121.07; Bulletin of the American Astronomical Society, Vol. 29, p.1404
Astronomy and Astrophysics
Astronomy
Scientific paper
We construct synthetic images and long-slit spectra of protostellar jets modeled as steady-state x-winds. Assuming uniform ionization fractions and electron temperatures, we calculate non-LTE level populations for five-level atoms. Synthetic images in the [S II]lambda 6716/6731 and [O I]lambda 6300/6364 lines have approximately the same surface brightness distribution as observed jets. Thus, observed jets may be optical illusions at their base, since x-winds become highly focused only at large distances from the source. Long-slit spectra taken with the slit placed along the central axis of the jet, or slightly diplaced from it, provide strong evidence in support of the x-wind theory. In both the models and the actual objects, wide line-profiles, containing both large positive and negative velocities, are often seen at the base of the flow, indicative of a wide-angle wind. As one progresses uo the length of the slit, the line profiles narrow to straddle the projected velocity of a well-collimated jet.
Glassgold Alfred E.
Shang Hsien
Shu Frank H.
No associations
LandOfFree
Synthetic Images and Long-Slit Spectra of Protostellar Jets 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 Synthetic Images and Long-Slit Spectra of Protostellar Jets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synthetic Images and Long-Slit Spectra of Protostellar Jets will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1178587