Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-01-14
Astrophys.J. 623 (2005) 952-966
Astronomy and Astrophysics
Astrophysics
Accepted for publication in ApJ (May 1, 2005 issue)
Scientific paper
10.1086/428828
We determine inner disk sizes and temperatures for four solar-type (1-2 M$_{\odot}$) classical T Tauri stars (AS 207A, V2508 Oph, AS 205A, and PX Vul) using 2.2 $\mu$m observations from the Keck Interferometer. Nearly contemporaneous near-IR adaptive optics imaging photometry, optical photometry, and high-dispersion optical spectroscopy are used to distinguish contributions from the inner disks and central stars in the interferometric observations. In addition, the spectroscopic and photometric data provide estimates of stellar properties, mass accretion rates, and disk co-rotation radii. We model our interferometric and photometric data in the context of geometrically flat accretion disk models with inner holes, and flared disks with puffed-up inner walls. Models incorporating puffed-up inner disk walls generally provide better fits to the data, similar to previous results for higher-mass Herbig Ae stars. Our measured inner disk sizes are larger than disk truncation radii predicted by magnetospheric accretion models, with larger discrepancies for sources with higher mass accretion rates. We suggest that our measured sizes correspond to dust sublimation radii, and that optically-thin gaseous material may extend further inward to the magnetospheric truncation radii. Finally, our inner disk measurements constrain the location of terrestrial planet formation as well as potential mechanisms for halting giant planet migration.
Akeson Rachel Lynn
Eisner Josh A.
Hillenbrand Lynne A.
Sargent Anneila I.
White Richard J.
No associations
LandOfFree
Observations of T Tauri Disks at Sub-AU Radii: Implications for Magnetospheric Accretion and Planet Formation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Observations of T Tauri Disks at Sub-AU Radii: Implications for Magnetospheric Accretion and Planet Formation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observations of T Tauri Disks at Sub-AU Radii: Implications for Magnetospheric Accretion and Planet Formation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-26908