New Infrared Veiling Measurements and Constraints on Accretion Disk Models for Classical T Tauri Stars

Astronomy and Astrophysics – Astronomy

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

50

Accretion, Accretion Disks, Infrared: Stars, Stars: Pre-Main-Sequence

Scientific paper

We analyze K-band infrared (IR) spectra of 14 classical and nine naked T Tauri stars. Using five lines of CO, we determine v sin i and show that IR and optical measurements agree well. From this we conclude that K-band absorption lines generally form in the stellar photosphere. Using line equivalent widths, we measure K-band veiling for classical T Tauri stars in our sample. Accretion disk models constrained by existing stellar and accretion parameters yield testable predictions for K-band veiling. In the context of these models, we examine sources of IR emission from the disk. The importance of disk reprocessing of emission from the accretion shock as material strikes the stellar surface is shown. We then show that current models constrained by the most recent estimates of mass accretion have a difficult time reproducing many of our high-veiling results. We suggest that dust out of the plane of the accretion disk (possibly in the magnetospheric flow itself) may account for much of the emission missing in the models.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

New Infrared Veiling Measurements and Constraints on Accretion Disk Models for Classical T Tauri Stars 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 New Infrared Veiling Measurements and Constraints on Accretion Disk Models for Classical T Tauri Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New Infrared Veiling Measurements and Constraints on Accretion Disk Models for Classical T Tauri Stars will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1234962

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.