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Session 10 - Interstellar Medium and Star Formation.
Display session, Monday, June 08
Atlas Ballroom,

[10.06] Near-infrared Hubble Space Telescope Images of Nearby Protostars

T. Hancock, S. Terebey (Extrasolar Research Corp.), D. Van Buren, D. L. Padgett, M. Brundage (Jet Propulsion Lab)

Our HST NICMOS data provide striking images of protostars to give a new window onto the gravitational collapse phase of the star formation process.

The high spatial resolution achieved, 20 AU, reveals the full complexity of dynamical collapse: binary protostars, nebulosity showing infalling streamers, dust absorption lanes, and disks oriented at odd angles with respect to the large scale outflow.

One source contains a candidate giant planet, a low-luminosity source which appears to have been recently ejected from a binary protostar. Another protostar displays both a wide-angle outflow and a jet, thus providing a unifying link between protostars and Herbig-Haro jet sources.

These results are part of a near-infrared imaging survey of protostars in the Taurus and rho Ophiuchus molecular clouds using the NICMOS camera on the Hubble Space Telescope. The NICMOS images are being analyzed using a 3D Monte Carlo radiative transfer code to test theories of cloud collapse, constrain protostellar wind models, and delineate the early formation of protostellar disks.

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Program listing for Monday