Probing Wind/Jet Dynamics in Young Stars: Forbidden Emission Line Profiles

Details Probing Wind/Jet Dynamics in Young Stars: Forbidden Emission Line Profiles Probing Wind/Jet Dynamics in Young Stars: Forbidden Emission Line Profiles

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000noao.prop..409m&link_type=abstract

NOAO Proposal ID #2000B-0409

Computer Science

Scientific paper

We propose to obtain very high-resolution spectra with HET of forbidden emission in low- and high-mass pre-main sequence stars. The low-velocity forbidden emission lines, ubiquitous in young stars, provide direct probes of the kinematic structure of low-velocity outflow in these objects. The wind is intimately related to and generated by accretion disks, though detailed models (ranging from tightly- constrained X-winds to more extended disk winds and photoevaporation) have not been rigorously tested; previous observations have had insufficient resolution to resolve the low-velocity emission. At the resolution available with HET, we will be able to detect signatures of Keplerian rotation in the line profiles if they are indeed formed in a disk wind. We will also compare line profile structure in low- and high- mass stars, enabling us to assess whether the same outflow phenomena occur at all masses, and to identify kinematic signatures of circumstellar disks in high-mass stars.

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