Molecular content of the circumstellar disk in AB Aur: First detection of SO in a circumstellar disk

Details Molecular content of the circumstellar disk in AB Aur: First detection of SO in a circumstellar disk Molecular content of the circumstellar disk in AB Aur: First detection of SO in a circumstellar disk

2010-09-28

arxiv.org/abs/1009.5597v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

5 pages, 4 figure

Scientific paper

Very few molecular species have been detected in circumstellar disks surrounding young stellar objects. We are carrying out an observational study of the chemistry of circumstellar disks surrounding T Tauri and Herbig Ae stars. First results of this study are presented in this note. We used the EMIR receivers recently installed at the IRAM 30m telescope to carry a sensitive search for molecular lines in the disks surrounding AB Aur, DM Tau, and LkCa 15. We detected lines of the molecules HCO+, CN, H2CO, SO, CS, and HCN toward AB Aur. In addition, we tentatively detected DCO+ and H2S lines. The line profiles suggest that the CN, HCN, H2CO, CS and SO lines arise in the disk. This makes it the first detection of SO in a circumstellar disk. We have unsuccessfully searched for SO toward DM Tau and LkCa 15, and for c-C3H2 toward AB Aur, DM Tau, and LkCa 15. Our upper limits show that contrary to all the molecular species observed so far, SO is not as abundant in DM Tau as it is in AB Aur. Our results demonstrate that the disk associated with AB Aur is rich in molecular species. Our chemical model shows that the detection of SO is consistent with that expected from a very young disk where the molecular adsorption onto grains does not yet dominate the chemistry.

Affiliated with

Also associated with

No associations

Rating

Molecular content of the circumstellar disk in AB Aur: First detection of SO in a circumstellar disk 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 Molecular content of the circumstellar disk in AB Aur: First detection of SO in a circumstellar disk, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Molecular content of the circumstellar disk in AB Aur: First detection of SO in a circumstellar disk will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-694579