Astronomy and Astrophysics – Astronomy
Scientific paper
May 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997pasp..109..549w&link_type=abstract
Publications of the Astronomical Society of the Pacific, v.109, p.549-553
Astronomy and Astrophysics
Astronomy
24
Stars: Pre-Main Sequence, Stars: Formation
Scientific paper
Using deep, narrow-band images of the main $\rho$ Oph dark cloud centered on the wavelengths of H$\alpha$ and [S~II], we present evidence for three new Herbig-Haro objects. This increases the total number in the cloud to five. In addition, positions for 5 candidate Herbig-Haro objects are given. Relatively high [S~II]/H$\alpha$ ratios indicate low excitation conditions for all of these nebulae. We list potential exciting stars for each Herbig-Haro object and candidate by identifying nearby young stellar objects with strong infrared excesses and/or millimeter continuum emission. The location of most of these nebulae near the cloud edges underscores the important role that extinction by dust plays in the $\rho$ Oph cloud in masking the presence of Herbig-Haro objects. Among the newly identified Herbig-Haro objects is a jet-like string of emission nebulae emanating from the classical T Tauri star SR~4. [S~II] emission is also found coincident with a knot of strong molecular hydrogen emission associated with the highly-collimated VLA~1623 molecular outflow. Indeed, the low excitation nature of all of the objects in our study, coupled with the high extinction of the cloud, suggests that a deep survey for shocked molecular hydrogen at $\lambda$=2.122 $\mu$m would be the best way to search for evidence of strong winds from the large population of young stellar objects in the cloud. (SECTION: Interstellar Medium and Nebulae)
Fanetti T. M.
Friel Eileen D.
Schwartz Richard D.
Wilking Bruce A.
No associations
LandOfFree
Herbig-Haro Objects in the \rho Ophiuchi Cloud 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 Herbig-Haro Objects in the \rho Ophiuchi Cloud, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Herbig-Haro Objects in the \rho Ophiuchi Cloud will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1247425