Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...610l.113g&link_type=abstract
The Astrophysical Journal, Volume 610, Issue 2, pp. L113-L116.
Astronomy and Astrophysics
Astronomy
8
Infrared: Ism, Ism: Abundances, Ism: Molecules
Scientific paper
We used high-resolution infrared spectra of the heavily embedded T Tauri star HL Tau to search for evidence of absorption due to the R0, R1, and R2 gas-phase CH4 ν3 lines near 3.3 μm. From this, we report a 3 σ upper limit of 1.3×1015 cm-2 for the CH4 gas column density toward HL Tau. Our results are compared to those found for CO gas toward this source and to the recent model for chemistry in the inner (10 AU) disks around T Tauri stars by Markwick et al. We find that the upper limit of methane ice+gas column density toward HL Tau, when compared to CO, is somewhat lower than but consistent with that measured toward other interstellar sources (~1%) but that it is much lower than that predicted in the Markwick et al. model and much less than the CH4/CO ratio (10%-80%) found in cometary volatiles. This has important implications for the processing of interstellar material and its incorporation into planetary bodies.
Brittain Sean
Gibb Erika Lynne
Haywood R.
Kulesa Craig
Rettig Terrence
No associations
LandOfFree
The Upper Limit for CH4 in the Protostellar Disk toward HL Tauri 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 The Upper Limit for CH4 in the Protostellar Disk toward HL Tauri, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Upper Limit for CH4 in the Protostellar Disk toward HL Tauri will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1857754