1999A&A...345L..43H


Query : 1999A&A...345L..43H

1999A&A...345L..43H - Astronomy and Astrophysics, volume 345, L43-46 (1999/5-3)

A double system of ionized jets in IRAS 20126+4104.

HOFNER P., CESARONI R., RODRIGUEZ L.F. and MARTI J.

Abstract (from CDS):

We have imaged the 7mm and 3.6cm continuum emission from the high mass (proto)star system IRAS 20126+4104 with the VLA. The 7mm emission appears unresolved with a synthesized beam of 1.7"x1.0", and comparison with 3mm and 1.3mm fluxes indicates a spectral index of about 3, so that emission from dust with an absorption coefficient proportional to ν is suggested. The 3.6cm emission consists of two elongated structures of approximate size 0.8"x≤0.2", the northern source being coincident with the millimeter emission. The position angle of both sources is identical to the large scale molecular outflow seen in HCO+(1-0). We discuss explanations for the origin of the 3.6cm continuum emission and although a cluster of three ultracompact HII regions provides a feasible model, we favor the interpretation of thermal ionized jets, based on the morphology of the emission, the velocity distribution of water masers coincident with the northern source, and the CH3CN emission which is oriented perpendicular to the 3.6cm continuum emission. In this case the measured fluxes are consistent with ionization caused by either shocks or stellar UV photons.

Abstract Copyright:

Journal keyword(s): stars: formation - ISM: HII regions - ISM: jets and outflows

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2673 2
2 LDN 1551 DNe 04 31 30.0 +18 12 30           ~ 789 1
3 NAME HH 80-81 HH 18 19 06 -20 51.4           ~ 204 0
4 NAME HH 80-81 IRS HII 18 19 11.8 -20 47 35           ~ 137 0
5 QSO B2005+40 QSO 20 07 44.9449261536 +40 29 48.603352020   18.5 19 20.3   ~ 281 1
6 IRAS 20126+4104 Y*O 20 14 25.8816769656 +41 13 36.879427236           B2.5-B0.5 415 0
7 NAME I20126N cor 20 14 26.029 +41 13 32.60           ~ 7 1

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2022.05.20-18:45:40

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