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- W2003277621 abstract "High-resolution infrared maps and echelle spectroscopy of the emission from warm molecular hydrogen in the AS 353A/HH 32 outflow are presented. H2 v = 1-0 S(1) images are compared with high-quality optical [S II] ??6716,6731, H?, and I-band images; we find that H2 line emission envelopes the HH 32A bow shock, extending downwind beyond its western edge. The H2 v = 1-0 S(1) line profiles in HH 32 are all single peaked and Gaussian or triangular in shape. The lines are rather narrow, typically 20-30 km s-1 (including instrumental smoothing), with peaks that are redshifted by ?8-25 km s-1 relative to the source radial velocity. Although the H2 data infer low velocities, we nevertheless find that the data are consistent with the high-velocity bow shock models (V ? 300-350 km s-1; 0 ? 15°-30° to the line of sight) used to interpret earlier optical data. We also report the discovery of three new Herbig-Haro objects. Designated HH 332, these features are evident only in our [S II] and H? images and not in our I-band image (they are not detected in H2). They are therefore regarded as bona fide HH objects associated with a previously unknown outflow." @default.
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- W2003277621 date "1996-05-01" @default.
- W2003277621 modified "2023-10-14" @default.
- W2003277621 title "Near-Infrared and Optical Observations of an Obliquely Viewed Bow Shock: AS 353A/HH 32" @default.
- W2003277621 doi "https://doi.org/10.1086/177237" @default.
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