Physics
Scientific paper
Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8323r&link_type=abstract
HST Proposal ID #8323
Physics
Hst Proposal Id #8323 Stellar Ejecta
Scientific paper
Despite significant recent advances in the investigation of Herbig-Haro jets powered by young stars, a number of fundamental problems remain unsolved. Among these are the precise determination of the mass loss rate through a jet, and the nature of the flow behavior in the jet launch and collimation region. We have discovered a class of HH jets which are irradiated by the UV radiation from nearby OB stars and are therefore photoionized. Such jets hold the promise of a direct measurement of the mass flow rate through a jet. Furthermore, our observations show that the opaque envelopes that normally obscure jet sources have been removed from these objects. We propose to use HST to study the brightest of these irradiated jets, HH 444. STIS spectra will be used to measure the distribution of electron density, the mass flux through the jet, and the kinematics and excitation conditions in or near the jet collimation region which will constrain models of jet formation. We will also use WFPC2 to determine the sub- arcsecond structure of the jet so that we can correctly interpret the STIS spectra, to search for evidence of a circumstellar disk needed to fuel the jet, and to probe the nature of the asymmetry seen in this jet.
No associations
LandOfFree
Herbig-Haro Jets Irradiated by Massive OB Stars 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 Jets Irradiated by Massive OB Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Herbig-Haro Jets Irradiated by Massive OB Stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-993226