2023MNRAS.520.4646K

Query : 2023MNRAS.520.4646K

2023MNRAS.520.4646K - Mon. Not. R. Astron. Soc., 520, 4646-4663 (2023/April-2)

A low-mass hub-filament with double centre revealed in NGC 2071-North.

KONYVES V., WARD-THOMPSON D., SHIMAJIRI Y., PALMEIRIM P. and ANDRE P.

Abstract (from CDS):

We present the first analysis in NGC 2071-North as a resolved hub-filament featuring a double centre. This ∼1.5 × 1.5 pc2 scale filament hub contains ∼500 M⊙. Seen from Planck, magnetic field lines may have facilitated the gathering of material at this isolated location. The energy balance analysis, supported by infalling gas signatures, reveals that these filaments are currently forming stars. Herschel 100 $\mu$m emission concentrates in the hub, at IRAS 05451+0037 and LkHα 316, and presents diffuse lobes and loops around them. We suggest that such a double centre could be formed, because the converging locations of filament pairs are offset, by 2.3 arcmin (0.27 pc). This distance also matches the diameter of a hub ring, seen in column density and molecular tracers, such as HCO+ (1-0) and HCN (1-0), that may indicate a transition and the connection between the hub and the radiating filaments. We argue that all of the three components of the emission star LkHα 316 are in physical association. We find that a ∼0.06-pc-sized gas loop, attached to IRAS 05451+0037, can be seen at wavelengths all the way from the Panoramic Survey Telescope and Rapid Response System (Pan-STARRS)-i to Herschel 100 $\mu$m. These observations suggest that both protostars at the double hub centre are interacting with the cloud material. In our 13CO data, we do not seem to find the outflow of this region that was identified in the 1980s with much lower resolution.

Abstract Copyright: © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): galaxies: star formation - ISM: clouds - ISM: individual objects: NGC 2071-North - ISM: structure

Simbad objects: 30

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Number of rows : 30
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 Perseus Cloud SFR 03 35.0 +31 13           ~ 1553 0
2 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
3 NAME Barnard's Loop HII 05 27.5 -03 58           ~ 131 1
4 NAME Ori A MoC 05 38 -07.1           ~ 3187 0
5 NAME Horsehead Nebula DNe 05 40 59.0 -02 27 30           ~ 555 0
6 NGC 2023 RNe 05 41 37.9 -02 15 52           ~ 657 1
7 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1498 0
8 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1198 1
9 LDN 1630 DNe 05 45.5 -00 59           ~ 392 0
10 NAME HH 24-26 MoC 05 46 07.34 -00 13 31.3           ~ 36 0
11 M 78 RNe 05 46 45.8 +00 04 45   8.0       ~ 397 0
12 NAME LDN 1630N Cl* 05 46 47.0 +00 09 50           ~ 15 1
13 NGC 2071 RNe 05 47 10 +00 18.0           ~ 661 1
14 HH 71 HH 05 47 20.6 +00 40 44           ~ 6 0
15 HH 471A HH 05 47 35.1 +00 38 47           ~ 2 0
16 EM* LkHA 316 TT* 05 47 35.7628470408 +00 38 39.905526732     14.8     K6e 35 1
17 2MASS J05473897+0038362 Y*O 05 47 38.9640881664 +00 38 36.226771116           ~ 12 0
18 HH 473 HH 05 47 40.6 +00 37 59           ~ 3 0
19 NAME NGC 2071-North PoC 05 47 42.3 +00 38 40           ~ 17 0
20 IRAS 05451+0037 Y*O 05 47 45.0013267080 +00 38 41.903322468           ~ 40 0
21 HH 474 HH 05 47 46.3 +00 39 05           ~ 3 0
22 LDN 1622 DNe 05 54 28 +01 48.2           ~ 110 0
23 NAME Mon R2 IRS 1 cor 06 07 46.20 -06 23 09.5           B0 65 0
24 NAME Mon R2 HII 06 07 47.58 -06 22 42.6           ~ 789 2
25 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 887 0
26 NAME Musca Cld 12 23 -71.3           ~ 258 0
27 LDN 1746 DNe 17 11.3 -27 22           ~ 157 0
28 NAME the Pipe Nebula DNe 17 30 -25.0           ~ 442 1
29 NAME Serpens South molecular cloud MoC 18 30 -02.0           ~ 116 0
30 NAME Aql Region reg 18 31.1 -02 10           ~ 456 0

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