2023A&A...671A..35L


Query : 2023A&A...671A..35L

2023A&A...671A..35L - Astronomy and Astrophysics, volume 671A, 35 (2023/3-1)

SOLIS XVII. Jet candidate unveiled in OMC-2 and its possible link to the enhanced cosmic-ray ionisation rate.

LATTANZI V., ALVES F.O., PADOVANI M., FONTANI F., CASELLI P., CECCARELLI C., LOPEZ-SEPULCRE A., FAVRE C., NERI R., CHAHINE L., VASTEL C. and EVANS L.

Abstract (from CDS):

Context. The study of the early phases of star and planet formation is important to understand the physical and chemical history of stellar systems such as our own. In particular, protostars born in rich clusters are prototypes of the young Solar System.
Aims. In the framework of the Seeds Of Life In Space (SOLIS) large observational project, the aim of the present work is to investigate the origin of the previously inferred high flux of energetic particles in the protocluster FIR4 of the Orion Molecular Cloud 2 (OMC-2), which appears asymmetric within the protocluster itself.
Methods. Interferometric observations carried out with the IRAM NOEMA interferometer were used to map the silicon monoxide (SiO) emission around the FIR4 protocluster. Complementary archival data from the ALMA interferometer were also employed to help constrain excitation conditions. A physical-chemical model was implemented to characterise the particle acceleration along the protostellar jet candidate, along with a non-LTE analysis of the SiO emission along the jet.
Results. The emission morphology of the SiO rotational transitions hints for the first time at the presence of a collimated jet originating very close to the brightest protostar in the cluster, HOPS-108.
Conclusions. The NOEMA observations unveiled a possible jet in the OMC-2 FIR4 protocluster propagating towards a previously measured enhanced cosmic-ray ionisation rate. This suggests that energetic particle acceleration by the jet shock close to the protostar might be at the origin of the enhanced cosmic-ray ionisation rate, as confirmed by modelling the protostellar jet.

Abstract Copyright: © The Authors 2023

Journal keyword(s): ISM: molecules - ISM: jets and outflows - line: identification - molecular data - molecular processes - radio lines: ISM

Simbad objects: 16

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Number of rows : 16
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 3C 84 Sy2 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4017 3
2 QSO B0414-189 QSO 04 16 36.54444889 -18 51 08.3402457   18.89 18.0 18.51   ~ 176 1
3 EM* LkHA 101 Em* 04 30 14.4355820328 +35 16 23.983198932   17.91 15.71 13.33   F 356 1
4 ESO 362-21 Sy1 05 22 57.98464178 -36 27 30.8512953   15.26 14.62 14.48   ~ 838 2
5 QSO J0527+0331 BLL 05 27 32.70544208 +03 31 31.5165613     20.00 18.43   ~ 60 1
6 M 42 HII 05 35 17 -05 23.4           ~ 4083 0
7 GBS-VLA J053525.96-050543.3 Rad 05 35 25.96 -05 05 43.3           ~ 9 0
8 V* V2457 Ori Or* 05 35 26.97000 -05 09 54.4644         18.858 ~ 151 0
9 OMC 2 MoC 05 35 27 -05 10.1           ~ 450 1
10 HOPS 108 Y*O 05 35 27.07 -05 10 00.4           ~ 29 0
11 2MASS J05352762-0509337 Y*O 05 35 27.622 -05 09 33.78           ~ 96 0
12 QSO B0539-057 QSO 05 41 38.08336552 -05 41 49.4283917     20.4 20.70   ~ 261 1
13 NAME Orion Molecular Cloud MoC 05 56 -01.8           ~ 1101 1
14 EM* MWC 349 ** 20 32 45.499080 +40 39 36.74124   15.88 13.15 12.13   Bep 802 0
15 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2265 1
16 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 2856 2

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