2014ApJ...791..123W


C.D.S. - SIMBAD4 rel 1.7 - 2020.04.06CEST12:03:25

2014ApJ...791..123W - Astrophys. J., 791, 123 (2014/August-3)

A study of dynamical processes in the Orion KL region using ALMA–Probing molecular outflow and inflow.

WU Y., LIU T. and QIN S.-L.

Abstract (from CDS):

This work reports high spatial resolution observations toward the Orion KL region with high critical density lines of CH3 CN (124-114) and CH3OH (8_-1, 8–70, 7_), as well as a continuum at ∼1.3 mm band. The observations were made using the Atacama Large Millimeter/Submillimeter Array with a spatial resolution of ∼1.''5 and sensitivity of about 0.07 K and ∼0.18 K for continuum and line, respectively. The observational results showed that the gas in the Orion KL region consists of jet-propelled cores at the ridge and dense cores east and south of the region that are shaped like a wedge ring. The outflow has multiple lobes, which may originate from an explosive ejection, and is not driven by young stellar objects. Four infrared bubbles were found in the Spitzer/IRAC emissions. These bubbles, the distributions of the previously found H2jets, the young stellar objects, and molecular gas suggest that BN is the explosive center. The burst time was estimated to be ≤ 1300 yr. At the same time, signatures of gravitational collapse toward Source I and the hot core were detected with material infall velocities of 1.5 km/s and ∼0.6 km/s, corresponding to mass accretion rates of 1.2x10–3 M/yr and 8.0x10–5 M/yr, respectively. These observations may support the belief that high-mass stars form via the accretion model, similar to their low-mass counterparts.

Abstract Copyright:

Journal keyword(s): ISM: jets and outflows - ISM: kinematics and dynamics - stars: individual: (Orion BN-KL, Source I) - stars: pre-main sequence

Nomenclature: Table 1: [WLQ2014] MMN (Nos MM1-MM7).

Status at CDS:  

Simbad objects: 28

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Number of rows : 28

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 LDN 1448 DNe 03 22.5 +30 35           ~ 463 0
2 MLLA 602 * 05 35 13.9700 -05 22 31.900           ~ 53 0
3 [RLK73] IRc 3N IR 05 35 14.01 -05 22 30.1           ~ 5 0
4 [RLK73] IRc 3S IR 05 35 14.02 -05 22 30.8           ~ 5 0
5 [WLQ2014] MM7 cor 05 35 14.05 -05 22 45.0           ~ 1 0
6 [WLQ2014] MM3 cor 05 35 14.05 -05 22 37.0           ~ 1 0
7 [WLQ2014] MM6 cor 05 35 14.10 -05 22 27.4           ~ 3 0
8 [WLQ2014] MM5 cor 05 35 14.11 -05 22 28.9           ~ 3 0
9 V* V2254 Ori Or* 05 35 14.113 -05 22 22.73           B 282 2
10 [RLK73] IRc 20 IR 05 35 14.16 -05 22 29.8           ~ 12 0
11 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 1977 1
12 [RLK73] IRc 6 IR 05 35 14.18 -05 22 26.7           ~ 36 0
13 [GD77] A IR 05 35 14.19 -05 22 34.0           ~ 58 0
14 [FW2011] J053514.253-052227.820 IR 05 35 14.253 -05 22 27.82           ~ 6 0
15 [FW2011] J053514.278-052230.647 IR 05 35 14.278 -05 22 30.65           ~ 68 0
16 [WLQ2014] MM2 cor 05 35 14.28 -05 22 37.0           ~ 2 0
17 [RLK73] IRc 17 IR 05 35 14.28 -05 22 20.1           ~ 7 0
18 [CBA97] 8 * 05 35 14.33 -05 22 25.2           ~ 13 0
19 [WLQ2014] MM4 cor 05 35 14.35 -05 22 30.9           ~ 8 0
20 NAME Ori N Y*O 05 35 14.35371 -05 22 32.8820           ~ 102 0
21 [RLK73] IRc 16W IR 05 35 14.39 -05 22 22.7           ~ 5 0
22 [RLK73] IRc 16N IR 05 35 14.45 -05 22 21.6           ~ 4 0
23 JCMTSE J053514.4-052232 Y*? 05 35 14.488 -05 22 32.10           ~ 46 0
24 [RLK73] IRc 16S IR 05 35 14.49 -05 22 23.7           ~ 5 0
25 NAME Orion Core ? 05 35 14.5 -05 22 30           ~ 174 0
26 [RLK73] IRc 2 IR 05 35 14.51548 -05 22 30.5943           ~ 568 1
27 [WLQ2014] MM1 cor 05 35 14.54 -05 22 31.4           ~ 1 0
28 QSO B0605-0834 QSO 06 07 59.69923743 -08 34 49.9781718     18.5 17.70   ~ 389 1

    Equat.    Gal    SGal    Ecl

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2020.04.06-12:03:25

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