Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.1604k&link_type=abstract
American Astronomical Society Meeting 205, #16.04; Bulletin of the American Astronomical Society, Vol. 36, p.1363
Astronomy and Astrophysics
Astronomy
Scientific paper
We present mid-IR N-band (λ (eff) = 10.16 μ m) observations of a carefully selected sample of single young stars found in the Taurus-Auriga molecular cloud. To understand early circumstellar disk evolution, we must distinguish between evolutionary effects of star+disk systems and dynamical effects of any possible companions. Combining observations at 10.16 μ m with those at 2.2 μ m (K-band), we probe a region in the disks between 0.05-2.0 AU. Analyzing the relationship between the K-N color index and the rotation period of the central star, we can investigate the role circumstellar disks play in regulating the angular momentum of the star in the pre-main sequence stage. Previous work in the Taurus cloud (Edwards et al. 1993; Bouvier et al. 1993) suggests that slowly rotating T Tauri stars possess optically-thick inner accretion disks, while rapidly rotating stars lack such disks. We extend these results with 10 micron observations of weak-emission T Tauri stars in Taurus and compare our results to those of Stassun et al. (2001) for youngstars in the Orion Nebula Cluster.
Herbst Tom
Kundurthy Praveen
Meyer Michael R.
Robberto Massimo
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