A Large Scale 12CO (J = 1 -- 0) Survey toward the Chamaeleon Region with NANTEN

Details A Large Scale 12CO (J = 1 -- 0) Survey toward the Chamaeleon Region with NANTEN A Large Scale 12CO (J = 1 -- 0) Survey toward the Chamaeleon Region with NANTEN

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001pasj...53.1071m&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.53, No. 6, pp. 1071-1080

Astronomy and Astrophysics

Astronomy

35

Ism: Clouds, Ism: Individual (Chamaeleon--Musca Dark-, Loud Complex), Ism: Molecules, Ism: Structure, Stars: Pre-Main Sequence

Scientific paper

We carried out a large-scale survey for molecular clouds in 12CO (J = 1 -- 0) emission toward the Chamaeleon region with the NANTEN 4-meter radio telescope at Las Campanas Observatory in Chile. The survey covered ~ 491 deg2 toward 284° <~ l <~ 320° and -34° <~ b <~ -6° at an 8' grid spacing. The total molecular mass in the observed area is estimated to be ~ 8300 Msolar. More than 60% of the total mass is concentrated in and around the previously known Cha I, II, and III dark clouds. Two cloud complexes having molecular hydrogen masses of ~ 430 Msolar and ~ 1300 Msolar, respectively, have been found at ~ 10° galactic-east of the Chamaeleon major clouds. We have identified a prominent filament extending from Cha I to the galactic-east direction, which is remarkably long (>~ 40 pc) compared with filamentary features found in other dark-cloud complexes. A correlation study between the CO distribution and isolated X-ray emitting T Tauri stars (TTSs) indicates that >~ 65% of the TTSs are located within 1 pc of the 12CO cloud boundaries. This suggests that low-density parental molecular gas still remains around the isolated TTSs, although the dense parts with density greater than 103 cm-3 have almost dissipated. This provides further support for the local formation of ``isolated'' T Tauri stars in small clouds.

Affiliated with

Also associated with

No associations

Rating

A Large Scale 12CO (J = 1 -- 0) Survey toward the Chamaeleon Region with NANTEN 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 A Large Scale 12CO (J = 1 -- 0) Survey toward the Chamaeleon Region with NANTEN, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Large Scale 12CO (J = 1 -- 0) Survey toward the Chamaeleon Region with NANTEN will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1373118