2014A&A...563L...1M


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.08CEST03:59:19

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/*>

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 [CMG2014] MM3 mm 03 28 55.500 +31 14 34.75           ~ 8 0
2 [JCC87] IRAS 2A Y*O 03 28 55.55 +31 14 36.7           ~ 390 3
3 [CMG2014] MM1 Y*O 03 28 55.580 +31 14 37.06           ~ 6 0
4 [CMG2014] MM2 Y*O 03 28 55.710 +31 14 35.33           ~ 7 0
5 V* DM Tau Or* 04 33 48.7335659850 +18 10 09.974471722 14.30 14.82 14.00     M2Ve 510 0
6 IRAS 04368+2557 Y*O 04 39 53.97816 +26 03 09.6804           ~ 237 0
7 NAME VLA 1623-243 Y*O 16 26 26.42 -24 24 30.0           ~ 373 0

    Equat.    Gal    SGal    Ecl

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2020.07.08-03:59:19

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