Computer Science
Scientific paper
Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8120o&link_type=abstract
HST Proposal ID #8120
Computer Science
Hst Proposal Id #8120 Young Stars And Circumstellar Material
Scientific paper
We propose to resolve the question of whether or not the circumstellar disks around young low mass stars in clusters containing O type stars are rapidly destroyed by photoevaporation. The answer will determine whether or not the conditions necessary for planet formation are common or rare in the massive star clusters where most stars are created. At the present there is a conundrum arising from the fact that most of the circumstellar disks survive in the Orion Nebula Cluster even though the theoretical models predict that the intense radiation field should have destroyed them in times short compared with the estimated age of the cluster. We propose to obtain STIS high resolution spectra which will allow direct measurement of any photoevaporative flow off disks around two young low mass stars near c Ori. These results will test existing theories for photoevaporation and directly tell us how long these disks can survive. Only the HST and STIS have the right combination o f spatial and spectral resolution to adequately reject the contaminating light from the Orion Nebula itself and allow clear determination of the emission coming from the young stellar object.
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