Evidence for CO depletion in the inner regions of gas-rich protoplanetary disks

Details Evidence for CO depletion in the inner regions of gas-rich protoplanetary disks Evidence for CO depletion in the inner regions of gas-rich protoplanetary disks

2008-10-19

arxiv.org/abs/0810.3417v2

Astronomy and Astrophysics

Astrophysics

v2: Letter format has been changed to Paper format; Change in the focus of the paper towards CO depletion; Major changes in te

Scientific paper

We investigate the physical properties and spatial distribution of Carbon Monoxide (CO) gas in the disks around the Herbig Ae/Be stars HD 97048 and HD 100546. Using high-spectral-resolution 4.588-4.715 $\mu$m spectra containing fundamental CO emission taken with CRIRES on the VLT, we probe the circumstellar gas and model the kinematics of the emission lines. By using spectro-astrometry on the spatially resolved targets, we constrain the physical size of the emitting regions in the disks. We resolve, spectrally and spatially, the emission of the $^{13}$CO v(1-0) vibrational band and the $^{12}$CO $v=1-0, v=2-1, v=3-2$ and $v=4-3$ vibrational bands in both targets, as well as the $^{12}$CO $v=5-4$ band in HD 100546. Modeling of the CO emission with a homogeneous disk in Keplerian motion, yields a best fit with an inner and outer radius of the CO emitting region of 11 and $\geq$ 100 AU for HD 97048. HD 100546 is not fit well with our model, but we derive a lower limit on the inner radius of 8 AU. The fact that gaseous [OI] emission was previously detected in both targets at significantly smaller radii suggests that CO may be effectively destroyed at small radii in the surface layers of these disks

Affiliated with

Also associated with

No associations

Rating

Evidence for CO depletion in the inner regions of gas-rich protoplanetary disks 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 Evidence for CO depletion in the inner regions of gas-rich protoplanetary disks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence for CO depletion in the inner regions of gas-rich protoplanetary disks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-232481