The Proper Motions of the Warm Molecular Hydrogen Gas in Herbig-Haro 1
The Astrophysical Journal1997Vol. 486(1), pp. L55–L58
Citations Over TimeTop 10% of 1997 papers
Abstract
We have measured the proper motions of three molecular hydrogen (v = 1-0 2.121 μm) knots in the Herbig-Haro 1 object using a 4.4 yr baseline (1992-1997). The HH 1F knot, which probably corresponds to the tip of the working surface of HH 1, has a proper motion of 0.19 ± 0.10 (arcsec yr-1) and a position angle of 315+ 29−25 deg. This motion is comparable to that determined in the atomic emission lines of Hα and [S II] λλ 6717/31, and confirms that the warm molecular H2 gas is partaking of the same motion as the atomic/ionic gas.
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