2019ApJ...871..137F


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.13CET06:48:00

2019ApJ...871..137F - Astrophys. J., 871, 137-137 (2019/February-1)

A 1000 au scale molecular outflow driven by a protostar with an age of <=4000 yr.

FURUYA R.S., KITAMURA Y. and SHINNAGA H.

Abstract (from CDS):

To shed light on the early phase of a low-mass protostar formation process, we conducted interferometric observations toward protostar GF 9-2 using the CARMA and SMA. The observations were carried out in the 12CO J=3-2 line and the continuum emission at wavelengths of 3.3 mm, 1.1 mm, and 850 µm with a spatial resolution of ≃400 au. All of the continuum images detected a single point-like source with a beam-deconvolved effective radius of 250 ± 80 au at the center of the previously known 1.1-4.5 M molecular cloud core. Compact emission is detected toward the object at the Spitzer MIPS and IRAC bands, as well as the four bands at the Wide-field Infrared Survey Explorer. Our spectroscopic imaging of the CO line revealed that the continuum source is driving a 1000 au scale molecular outflow, including a pair of lobes where a collimated "higher"-velocity (∼10 kms–1 with respect to the velocity of the cloud) red lobe exists inside a poorly collimated "lower"-velocity (∼5 kms–1) red lobe. These lobes are rather young (dynamical timescales of ∼500-2000 yr) and the least powerful (momentum rates of ∼10–8–10–6Mkms–1 yr–1 ) ones so far detected. A protostellar mass of M*≲0.06M was estimated using an upper limit of the protostellar age of τ* <= (4 ± 1) x 103 yr and an inferred nonspherical steady mass accretion rate of ∼1 x 10–5 M yr–1. Together with the results from an SED analysis, we discuss that the outflow system is driven by a protostar with a surface temperature of ∼3000 K, and that the natal cloud core is being dispersed by the outflow.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): ISM: evolution - ISM: individual: (GF9-2, L1082C, WISE J205129.83+601838) - ISM: jets and outflows - stars: formation - stars: protostars - submillimeter: ISM

Simbad objects: 15

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Number of rows : 15

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 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3463 3
2 3C 279 QSO 12 56 11.1664521013 -05 47 21.531840471   18.01 17.75 15.87   ~ 2635 2
3 6C 164218+690201 QSO 16 42 07.84850549 +68 56 39.7564973   19.723   19.219   ~ 278 1
4 3C 345 QSO 16 42 58.8100340220 +39 48 36.999540578   16.81 16.59 16.84   ~ 1530 2
5 4C 09.57 BLL 17 51 32.81857318 +09 39 00.7284829   17.46 16.78 15.57   ~ 785 1
6 ICRF J184916.0+670541 Sy1 18 49 16.07228978 +67 05 41.6802978     20 17.45   ~ 208 1
7 EM* MWC 349 Em* 20 32 45.6328 +40 39 36.143   15.88 13.15 12.13   Bep 689 1
8 3C 418.0 QSO 20 38 37.03473972 +51 19 12.6625810   21.30 20.00 18.9   ~ 261 0
9 LDN 1082 DNe 20 51.1 +60 11           ~ 33 0
10 NAME [BM89] L1082C DNe 20 51 27.4 +60 19 00           ~ 32 0
11 IRAS 20503+6006 FIR 20 51 29.82576 +60 18 38.5560           ~ 7 1
12 WISEA J205129.83+601838.4 IR 20 51 29.83 +60 18 38.4           ~ 1 0
13 NAME GF 9-2 * 20 51 30.1 +60 18 39           ~ 16 1
14 NAME BL Lac BLL 22 02 43.2913773726 +42 16 39.978417860   15.66 14.72     ~ 1975 1
15 3C 454.3 QSO 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2441 2

    Equat.    Gal    SGal    Ecl

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2019.11.13-06:48:00

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