AAS 197, January 2001
Session 92. Star Formation in Nearby Galaxies
Oral, Wednesday, January 10, 2001, 10:30am-12:00noon, Royal Palm 3/4

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[92.06] HST/VLA Imaging of a Possible Tidal Dwarf Galaxy in the Southern Arm of the Antennae

I. Saviane, R.M. Rich (UCLA), J.E. Hibbard (NRAO)

We present photometry of the star formation regions in a possible dwarf spheroidal galaxy at the end of the Southwest tail of NGC 4038/9 (the ``Antennae''). This object probably formed in situ from gas ejected during the merger, and may evolved to be a gravitationally bound, free floating galaxy. Our photometry obtained using WFPC2 on board HST reaches to V=28 and clearly shows evidence for young (few Myr old) stellar populations, with OB stars but no obvious massive star clusters. We compare the location of the star forming regions with HI observed at the VLA.

Based on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc. under NASA contract No. NAS5-26555. Support for this work was provided by NASA through grant number GO-6669 from the Space Telescope Science Institute.

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