Computer Science
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992hst..prop.3623l&link_type=abstract
HST Proposal ID #3623
Computer Science
Hst Proposal Id #3623
Scientific paper
We propose to use the HST Wide Field Camera to obtain deep images of the Galactic center with 0.1" (850 AU at 8.5 kpc) resolution at 1.03 micron wavelength. Recent observations have revealed a multitude of unusual phenomena at the center, suggesting that the Galactic center may be a low energy version of an active galactic nucleus and may harbor a massive collapsed object. Unambiguous delineation of the central star cluster, which would provide an important constraint on the central mass distribution, has been hampered by the inadequate angular resolution of ground-based observations. A 20 min. HST observation by us has already detected components of IRS16, which has been the focus of previous efforts to define the central star cluster. The proposed observation will map the structure of IRS16 in much greater detail. The resolution and sensitivity of the proposed observations can also detect and resolve individual K and M gaint stars of the central star cluster, despite the large visual extinction to the center; several late M giants may already be detected by the previous HST data. Understanding the nearest galactic nucleus will be important for the interpretation of more energetic active galactic nuclei.
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