Near-Infrared and Optical Observations of an Obliquely Viewed Bow Shock: AS 353A/HH 32

Details Near-Infrared and Optical Observations of an Obliquely Viewed Bow Shock: AS 353A/HH 32 Near-Infrared and Optical Observations of an Obliquely Viewed Bow Shock: AS 353A/HH 32

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...463..246d&link_type=abstract

Astrophysical Journal v.463, p.246

Astronomy and Astrophysics

Astronomy

28

Ism: Jets And Outflows, Ism: Individual Alphanumeric: As 353A/Hh 32, Ism: Kinematics And Dynamics, Shock Waves, Stars: Pre-Main-Sequence

Scientific paper

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] λλ6716,6731, Hα, 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; θ ˜ 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 Hα 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.

Affiliated with

Also associated with

No associations

Rating

Near-Infrared and Optical Observations of an Obliquely Viewed Bow Shock: AS 353A/HH 32 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 Near-Infrared and Optical Observations of an Obliquely Viewed Bow Shock: AS 353A/HH 32, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Near-Infrared and Optical Observations of an Obliquely Viewed Bow Shock: AS 353A/HH 32 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1356924