2012A&A...539A.130M


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.09CEST07:58:45

2012A&A...539A.130M - Astronomy and Astrophysics, volume 539A, 130-130 (2012/3-1)

Subarcsecond SMA observations of the prototype class 0 object VLA 1623 at 1.3 mm: a single protostar with a structured outflow cavity?

MAURY A., OHASHI N. and ANDRE P.

Abstract (from CDS):

We present 1.3-mm subarcsecond SMA observations of the prototypical Class 0 protostar VLA1623. We report the detection of 1.3-mm continuum emission both from the central protostellar component VLA1623 and two additional sources, Knot-A and Knot-B, which have been already detected at longer wavelengths. Knot-A and Knot-B are both located along the western cavity wall opened by the protostellar outflow from VLA1623. Our SMA observations moreover show that these two continuum sources are associated with bright, high-velocity 12CO(2-1) emission, slightly shifted downstream of the outflow propagation direction with respect to the 1.3-mm continuum emission peaks. The alignment of Knot-A and Knot-B along the protostellar outflow cavity, the compactness of their 1.3-mm continuum emission, and the properties of the associated CO emission suggest that these two sources trace outflow features due to shocks along the cavity wall, rather than protostellar objects. While it was considered as one of the best examples of a close protobinary system so far, the present analysis suggests that the prototypical Class 0, VLA1623, is single on the scales a>100AU probed by our SMA observations. Moreover, we present here the second robust case of compact millimeter continuum emission produced by interactions between the protostellar jet and the envelope of a Class 0 protostar, which suggests a high occurrence of these outflow features during the embedded phase.

Abstract Copyright:

Journal keyword(s): stars: formation - techniques: interferometric - stars: low-mass - dust, extinction -ISM: individual objects: VLA1623 - matter circumstellar

Simbad objects: 11

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Number of rows : 11

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 2MASS J08254384-5100326 Y*O 08 25 43.85 -51 00 32.7           ~ 298 1
2 QSO B1514-24 BLL 15 17 41.8135246339 -24 22 19.482167214   15.13 14.00 13.95   ~ 647 3
3 QSO B1622-253 QSO 16 25 46.89164010 -25 27 38.3267989   21.3 20.6 19.60   ~ 303 1
4 CRBR 2316.0-1626 Y*? 16 26 17.46816 -24 23 12.9552           ~ 21 0
5 NAME VLA 1623-243 Y*O 16 26 26.42 -24 24 30.0           ~ 374 0
6 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3037 0
7 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1042 1
8 NAME SH 2-68 FIR 1 cor 18 29 49.63 +01 15 21.9           ~ 236 2
9 QSO B1921-293 BLL 19 24 51.05595514 -29 14 30.1210524   18.71 18.21 15.07   ~ 690 0
10 LDN 663 DNe 19 36 55 +07 34.4           ~ 558 0
11 LDN 1157 DNe 20 39 06.4 +68 02 13           ~ 485 0

    Equat.    Gal    SGal    Ecl

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2020.08.09-07:58:45

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