{\it Hubble Space Telescope} Imaging of Herbig-Haro Object No. 2

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Session 62 -- Very Young Stars
Display presentation, Thursday, 9:20-4:00, Pauley Room

[62.07] {\it Hubble Space Telescope} Imaging of Herbig-Haro Object No. 2

R.D. Schwartz (U. of MO-St. Louis), M. Cohen (U.C.-Berkeley), B.F. Jones (U.C.-Santa Cruz), K.-H. Bohm (U. of Washington), J.C. Raymond, L.W. Hartmann (CfA), R. Mundt (MPI-Heidelberg), M.A. Dopita (MSSSO), A.S.B. Schultz (Washington U.)

Images of HH~2 obtained with the Planetary Camera of the Hubble Space Telescope are presented and discussed. The images, obtained in the emission lines of H$\alpha$, [S II], and [O III] at a scale of 0.044 arcsec pixel$^{-1}$, have been registered to within 11 mas, and the spherically-aberrated images have been restored with the Richardson-Lucy algorithm. The A and H complexes in HH 2, which appear as somewhat extended (2\asec - 3\asec), amorphous features on ground-based images, are found to resolve into a rich array of structures with sizes in the range 0.2\asec - 0.4\asec, embedded within faint extended emission. A wide range of excitation is evident throughout each complex. Although a few of the structures are suggestive of bow shock geometry, most of the features appear chaotic with complex excitation structure. It is tentatively suggested that the features in HH~2 may be the result of the fragmentation of a bow wave. This work was supported by STScI grant GO-2243.01.

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