J/A+A/566/A26 Jet models for the quasar NRAO150 (Molina+, 2014)
Evidence for internal rotation and a helical magnetic field in the jet of the
quasar NRAO150.
Molina S.N., Agudo I., Gomez J.L., Krichbaum T.P., Marta-Vidal I., Roy A.L.
<Astron. Astrophys. 566, A26 (2014)>
=2014A&A...566A..26M 2014A&A...566A..26M
ADC_Keywords: QSOs ; Polarization
Keywords: galaxies: active - galaxies: jets - quasars: general -
galaxies: groups: individual: NRAO150 - techniques: polarimetric -
techniques: interferometric
Abstract:
We present the results of the study of the relativistic jet of the
quasar NRAO150.
Our study confirm that the jet is seen at an extremely small angle to
the line of sight and there is not a clear region to be identify as
the core of the jet. The innermost regions of the jet show a
counter-clockwise jet position angle swing at a high angular rate.
We have studied the kinematic of the emission features into the
innermost regions by fitting a model which explain the jet position
angle swing as a rotation of the jet material following the toroidal
magnetic field.
This could be the first direct evidences about the helical structure
of the magnetic field into the innermost regions of relativistic jets.
Description:
We present the model-fit parameters of 8, 15, 22, 43 and 86 GHz VLBI
images.
Objects:
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RA (2000) DE Designation(s)
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03 59 29.75 +50 57 50.2 NRAO150 = QSO B0355+508
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
modelfit.dat 82 81 List of model-fits parameters of NRAO150
(tables 3-7)
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Byte-by-byte Description of file: modelfit.dat
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Bytes Format Units Label Explanations
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1- 2 I2 GHz Freq [8/86] Total intensity VLBI image frequency
4- 13 A10 "date" Date Observing epoch (between 2006 and 2010)
15- 16 A2 --- Comp Name of emission component
(Q0, Q1, Q2, Q3, Q5 or Qn)
18- 22 F5.2 Jy Flux Flux density
24- 27 F4.2 Jy e_Flux rms uncertainty on Flux density
29- 33 F5.2 mas oRA Relative right ascension
35- 38 F4.2 mas e_oRA rms uncertainty on oRA
40- 44 F5.2 mas oDE Relative declination
46- 49 F4.2 mas e_oDE rms uncertainty on oDE
51- 52 A2 --- l_Size [≤ ] Limit flag on Size
54- 57 F4.2 mas Size [0.02/2.5] Angular size of emission feature
59- 62 F4.2 mas e_Size ? rms uncertainty on Size
64- 67 F4.1 % Pol [0.2/16]? Degree of polarization
69- 71 F3.1 % e_Pol ? rms uncertainty on Pol
73- 77 F5.1 deg PolPA [-180/180[? Electric vector position angle
79- 82 F4.1 deg e_PolPA ? rms uncertainty on EVPA
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Acknowledgements:
Sol N. Molina, smolina(at)iaa.es
(End) Patricia Vannier [CDS] 17-Apr-2014