Other
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop.3607d&link_type=abstract
Spitzer Proposal ID #3607
Other
Scientific paper
The unusual eclipsing object KH 15D is a weak-lined T Tauri star showing deep periodic eclipses, which must be produced by circumstellar matter. Although weak-lined T Tauri stars are not usually undergoing significant accretion, KH 15D has other spectroscopic properties normally associated with actively accreting stars. For example, it exhibits a rich spectrum of shocked molecular hydrogen emission, rivaled only by T Tauri itself. Moreover, the nature of the KH 15D eclipses is varying with time. The system has recently been explained as a spectroscopic binary in which a nodally-precessing circumbinary ring is gradually blocking the binary star. This model immediately calls for mid-IR observations to detect the thermal emission of the circumbinary ring, and verify its existence. We propose low spectral resolution observations using IRS and MIPS to detect thermal emission from the dusty ring which lies in the inner environment of the system, and high resolution long-wavelength spectroscopy to search for forbidden atomic lines, and rotational lines of molecular hydrogen, formed in the outer environment of the system.
Charbonneau David
Chiang Eugene
Deming Drake
Harrington Joseph
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