Joan R. Najita et al. 2009 ApJ 691 738 doi:10.1088/0004-637X/691/1/738
Joan R. Najita1, Greg W. Doppmann1, John S. Carr2, James R. Graham3 and J. A. Eisner3
Show affiliationsWe present high-resolution (R = 25,000-35,000) K-band spectroscopy of two young stars, MWC 480 and V1331 Cyg. Earlier spectrally dispersed (R = 230) interferometric observations of MWC 480 indicated the presence of an excess continuum emission interior to the dust sublimation radius, with a spectral shape that was interpreted as evidence for hot water emission from the inner disk of MWC 480. Our spectrum of V1331 Cyg reveals strong emission from CO and hot water vapor, likely arising in a circumstellar disk. In comparison, our spectrum of MWC 480 appears mostly featureless. We discuss possible ways in which strong water emission from MWC 480 might go undetected in our data. If strong water emission is in fact absent from the inner disk, as our data suggest, the continuum excess interior to the dust sublimation radius that is detected in the interferometric data must have another origin. We discuss possible physical origins for the continuum excess.
circumstellar matter; planetary systems: protoplanetary disks; stars: individual (MWC480, V1331 Cyg); stars: pre-main sequence
Issue 1 (2009 January 20)
Received 2008 July 18, accepted for publication 2008 September 15
Published 2009 January 19
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Domenico D'Alessandro 2003 J. Phys. A: Math. Gen. 36 9721
Sébastien Galtier and Eric Buchlin 2007 ApJ 656 560
J. A. Eisner and S. R. Kulkarni 2002 ApJ 574 426
Valerii V Ryazanov et al 2004 Phys.-Usp. 47 732
Zhao Ke et al 2006 Chinese Phys. 15 2338
Kenneth Hong and Edward Teo 2003 Class. Quantum Grav. 20 3269