Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aipc..713..103r&link_type=abstract
THE SEARCH FOR OTHER WORLDS: Fourteenth Astrophysics Conference. AIP Conference Proceedings, Volume 713, pp. 103-106 (2004).
Astronomy and Astrophysics
Astrophysics
Infrared Excess, Debris Disks, Protoplanetary Disks, Exo-Zodiacal Dust, Pre-Main Sequence Objects, Young Stellar Objects And Protostars, Circumstellar Shells, Clouds, And Expanding Envelopes, Circumstellar Masers
Scientific paper
We present the first spatially resolved spectrum of scattered light from the TW Hydrae protoplanetary disk. This nearly face-on disk is optically thick, surrounding a classical T-Tauri star in the nearby 8 Myr old TW Hya association. Accretion of disk material onto the central star is still occurring, but there are signs that growth of planetary material has begun.
Our HST-STIS spectrum covers the optical bandpass from 5000 Å to 1 μm. After careful subtraction of a PSF star spectrum, spectra can be extracted between 37 AU and about 124 AU from the star. The scattered light spectra have the same color as the star (gray scattering) at all radii, except possibly the very innermost region. This likely indicates that either the scattering dust grains are much larger than 1 μm throughout the bulk of the disk or that the disk remains very optically thick out to 124 AU.
Malumuth Eliot
Roberge Aki
Weinberger Alycia J.
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