2021ApJ...908..175C

Query : 2021ApJ...908..175C

2021ApJ...908..175C - Astrophys. J., 908, 175-175 (2021/February-3)

The extraordinary outburst in the massive protostellar system NGC 6334 I-MM1: spatiokinematics of water masers during a contemporaneous flare event.

CHIBUEZE J.O., MacLEOD G.C., VORSTER J.M., HIROTA T., BROGAN C.L., HUNTER T.R. and VAN ROOYEN R.

Abstract (from CDS):

Following an eruptive accretion event in NGC 6334I-MM1, flares in the various maser species, including water masers, were triggered. We report the observed relative proper motion of the highly variable water masers associated with the massive star-forming region, NGC 6334I. High velocity H2O maser proper motions were detected in five maser clusters, CM2-W2 (bow-shock structure), MM1-W1, MM1-W3, UCHII-W1, and UCHII-W3. The overall average of the derived relative proper motion is 85 km s–1. This mean proper motion is in agreement with the previous results from VLA multiepoch observations. Our position as well as the velocity variance and covariance matrix analyses of the maser proper motions show its major axis to have a position angle of -79.°4, cutting through the dust cavity around MM1B and being aligned in the northwest-southeast direction. We interpret this as the axis of the jet driving the CM2 shock and the maser motion. The complicated proper motions in MM1-W1 can be explained by the combined influence of the MM1 northeast-southwest bipolar outflow, the CS(6-5) north-south collimated bipolar outflow, and the radio jet. The relative proper motions of the H2O masers in UCHII-W1 are likely not driven by the jets of the MM1B protostar but by MM3-UCHII. Overall, the post-accretion burst relative proper motions of the H2O masers trace shocks of jet motion.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Stellar jets - Star-forming regions - Astrophysical masers - Long baseline interferometry - Shocks

VizieR on-line data: <Available at CDS (J/ApJ/908/175): table1.dat>

Simbad objects: 21

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Number of rows : 21
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Per B SyG 04 37 04.37535450 +29 40 13.8179631   21.7       ~ 533 2
2 MMB G192.600-00.048 Y*O 06 12 54.0100 +17 59 23.200           ~ 430 0
3 MCG-02-24-007 LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 1077 1
4 [BHC2016] MM5 mm 17 20 53.040 -35 47 09.93           ~ 4 0
5 [HBM2006b] I-SMA4 mm 17 20 53.099 -35 47 03.32           ~ 18 0
6 [BHC2016] MM2 mm 17 20 53.188 -35 46 59.32           ~ 47 0
7 2MASS J17205320-3547265 Y*O 17 20 53.205 -35 47 26.52           ~ 6 0
8 NAME NGC 6334-I Cl* 17 20 53.35 -35 47 01.5           ~ 373 0
9 [BHC2016] CM2 Rad 17 20 53.384 -35 46 55.68           ~ 12 0
10 [BHC2016] MM1G mm 17 20 53.387 -35 46 57.27           ~ 4 0
11 [BHC2016] MM1 cor 17 20 53.415 -35 46 57.88           ~ 121 0
12 [BHC2016] MM1B mm 17 20 53.419 -35 46 57.84           ~ 17 0
13 [BHC2016] MM1F mm 17 20 53.435 -35 46 56.91           ~ 5 0
14 NAME NGC 6334F (C) HII 17 20 53.45 -35 47 02.6           ~ 244 1
15 [BHC2016] MM1C mm 17 20 53.450 -35 46 58.28           ~ 6 0
16 [BHC2016] MM9 cor 17 20 53.896 -35 46 59.10           ~ 6 0
17 QSO B1730-130 Bla 17 33 02.70578907 -13 04 49.5482119   18 19.50 18.78 17.39 ~ 1198 1
18 MMB G358.931-00.030 SFR 17 43 10.02 -29 51 45.8           ~ 70 0
19 [BHT2019] G358.93-00.03 MM1 mm 17 43 10.1014 -29 51 45.693           ~ 37 0
20 IRAS 20231+3440 HII 20 25 07.2435401472 +34 50 05.260444728           ~ 21 1
21 NAME Cep A HW 2 Y*O 22 56 17.9 +62 01 49           B0.5 243 0

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