Detection of a Circumstellar Gas around DM Tauri: A Protoplanetary Disk around a Single Star?

Details Detection of a Circumstellar Gas around DM Tauri: A Protoplanetary Disk around a Single Star? Detection of a Circumstellar Gas around DM Tauri: A Protoplanetary Disk around a Single Star?

Aug 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...449..894h&link_type=abstract

Astrophysical Journal v.449, p.894

Astronomy and Astrophysics

Astronomy

16

Ism: Molecules, Stars: Individual Constellation Name: Dm Tauri, Radio Lines: Ism, Stars: Circumstellar Matter, Stars: Pre-Main-Sequence

Scientific paper

Sensitive molecular line observations carried out with the Nobeyama 45 m telescope have resulted in the detection of the 12CO (J = 1-0) and 13CO (J = 1-0) emission centered on the young, classical T Tauri star, DM Tau. The derived peak antenna temperatures are 0.3 K in 12CO and 0.1 K in 13CO. No C18O emission was detected at an upper limit (3 σ) of 45 mK. The emission feature has a line width of 1.7 km s-1 and is centered at VLSR = 5.9 km s-1, which coincides well with the reported radial velocity for DM Tau (5.9±2.1 km s-1). The 13CO profile shows a symmetric double peak, suggesting a Keplerian rotating disk. These observations suggest that the molecular gas is associated with and is most probably gravitationally bound to DM Tau. The derived radius of the gaseous disk is about 1000 AU using an optically thick disk model and a Keplerian rotating disk model. The gaseous mass is between 7 × 10-4 and 1 × 10-3 Msun from the 13CO intensity and the upper limit of C18O intensity. Our results suggest that molecular gas is depleted from the standard gas-to-dust mass ratio or that mass distribution in the disk is steeper than the standard law, r-1.5, although our observations cannot detect emission from an optically thick gaseous component inward of r < 100 AU, if the emission comes from a Keplerian rotating disk.

Affiliated with

Also associated with

No associations

Rating

Detection of a Circumstellar Gas around DM Tauri: A Protoplanetary Disk around a Single Star? 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 Detection of a Circumstellar Gas around DM Tauri: A Protoplanetary Disk around a Single Star?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection of a Circumstellar Gas around DM Tauri: A Protoplanetary Disk around a Single Star? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1269379