A High-Resolution Proper Motion Study of the Ionized Gas Near Sgr A*

Details A High-Resolution Proper Motion Study of the Ionized Gas Near Sgr A* A High-Resolution Proper Motion Study of the Ionized Gas Near Sgr A*

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7842s&link_type=abstract

HST Proposal ID #7842

Physics

Hst Proposal Id #7842 Interstellar And Intergalactic Media

Scientific paper

We propose to observe the inner 0.5 pc { 12'' at the Galactic center distance} of the Galaxy in Paschen Alpha at high spatial resolution with Camera 1 of NICMOS in order to study the detailed morphology and transverse motion of ionized gas near Sgr A*. Proper motions in the ionized gas within 0.5'' of Sgr A* will be measured for the first time and will provide a measure of the influence of gravitational versus non- gravitational forces. Structures observed in the ionized gas as a result of wind-wind collisions, evidence of infall and outflow, as well as kinematic and spatial correlations to stellar proper motions {NICMOS proposal 7225} will yield unprecedented understanding of the environment of black hole candidate, Sgr A*. The two epochs proposed here to derive proper motions will be combined with observations from approved proposal 7320 to increase the time baseline of the proper motion measurement.

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