Nucleus and Inner Disk of M51

Details Nucleus and Inner Disk of M51 Nucleus and Inner Disk of M51

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7237s&link_type=abstract

HST Proposal ID #7237

Physics

Hst Proposal Id #7237 Galaxies

Scientific paper

M 51 is the nearest grand design spiral galaxy {9.5 Mpc, 0.15" corresponds to 8 pc} with strongly enhanced star formation along the spiral arms and evidence of a central low luminosity AGN. NICMOS will be used to probe dust-obscured HII regions using P-alpha and study the stellar population variations in the spiral arms and nuclear region. For the nucleus, P-alpha and broad band high resolution images will be used to study the HII and continuum near the central "accretion disk". The spiral arms in the inner disk will be imaged with a mosaic of 9 fields in broad band continuum and P-alpha. One spiral arm field SW of the nucleus will also be imaged in H2, and the CO-bands. The goal is to reveal the HII regions and molecular shocks in the highly obscured spiral arm star forming regions and to look for systematic offsets between the spiral arm H2, HII, and giant stars {CO-bands}. {Timing is such that no parallels should be done with WFPC2 or STIS.}

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