SIMBAD references

2014A&A...563L...1M - Astronomy and Astrophysics, volume 563, L1-1 (2014/3-1)

First results from the CALYPSO IRAM-PdBI survey. I. Kinematics of the inner envelope of NGC 1333-IRAS 2A.

MARET S., BELLOCHE A., MAURY A.J., GUETH F., ANDRE Ph., CABRIT S., CODELLA C. and BONTEMPS S.

Abstract (from CDS):

The structure and kinematics of Class 0 protostars on scales of a few hundred AU is poorly known. Recent observations have revealed the presence of Keplerian disks with a diameter of 150-180AU in L1527-IRS and VLA1623A, but it is not clear if such disks are common in Class 0 protostars. Here we present high-angular-resolution observations of two methanol lines in NGC1333-IRAS2A. We argue that these lines probe the inner envelope, and we use them to study the kinematics of this region. Our observations suggest the presence of a marginal velocity gradient normal to the direction of the outflow. However, the position velocity diagrams along the gradient direction appear inconsistent with a Keplerian disk. Instead, we suggest that the emission originates from the infalling and perhaps slowly rotating envelope, around a central protostar of 0.1-0.2M. If a disk is present, it is smaller than the disk of L1527-IRS, perhaps suggesting that NGC 1333-IRAS2A is younger.

Abstract Copyright:

Journal keyword(s): ISM: individual objects: NGC 1333-IRAS2A - ISM: kinematics and dynamics - ISM: molecules - stars: formation

VizieR on-line data: <Available at CDS (J/A+A/563/L1): list.dat fits/*>

Status at CDS:  

Simbad objects: 7

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2014A&A...563L...1M and select 'bookmark this link' or equivalent in the popup menu


2020.05.31-00:20:51

© Université de Strasbourg/CNRS

    • Contact