Infrared observations of an eclipsing binary T Tauri star

Details Infrared observations of an eclipsing binary T Tauri star Infrared observations of an eclipsing binary T Tauri star

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop.3469a&link_type=abstract

Spitzer Proposal ID #3469

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Scientific paper

The eclipsing T Tauri star KH 15D has a period of 48 days with eclipses of 3.5 magnitudes lasting for 20 days. The properties of this star can be explained if it is an eccentric binary T Tauri star with semi-major axis 0.28 AU and eccentricity 0.7 surrounded by a precessing ring of dust at 2-3 AU which is gradually eclipsing both stars. We wish to make infrared observations of this system to (a) constrain the inclination and width of the ring; (b) constrain the size of the dust within the ring to confirm evidence for grain-growth; (c) look for the presence of PAH, silicates or other mid-infrared features which may constrain the presence of smaller dust grains within the system. We will use our observations to measure the surface density of the edge of the ring which may be shaped by a shepherding planet.

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