The Morphology Of Protostellar Environments

Details The Morphology Of Protostellar Environments The Morphology Of Protostellar Environments

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7550w&link_type=abstract

HST Proposal ID #7550

Computer Science

Hst Proposal Id #7550 Young Stars And Circu

Scientific paper

This proposal requests archival WFPC2 images of the circumstellar environments of T Tauri stars. We shall examine differences in the scattered light images of T Tau, HL Tau, and HH-30 as probes of different stages of star formation seen from different viewing angles. The scattered light images of T Tau and HL Tau exhibit the characteristics of light reaching the observer via scattering off the walls of a cavity carved by jets in the natal dust cloud. T Tau is viewed along a cavity axis; HL Tau is viewed at higher inclination and shows evidence of multiple cavities. Previous modeling efforts of HH-30 assumed that circumstellar material forms a disk-like structure, suggesting that this object is more evolved than T Tau and HL Tau. We shall investigate whether this is indeed true, since the ``disk'' parameters adopted in the previous analysis mimic those of infalling envelopes with cavities. We shall model scattered light images using 3D Monte Carlo radiation transfer codes that calculate the emergent flux and polarization images. We shall also compare emergent spectral energy distributions with published optical through far IR spectra for each object. Thus the modeling effort will use imaging, polarimetry, and spectroscopy to derive a consistent picture for the circumstellar environments of these young stellar objects.

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