Details

Autor(en) / Beteiligte

• Algaba, J. C.
• Rani, B.
• Lee, S. S.
• Kino, M.
• Park, Jongho
• Kim, Jae-Young

Titel

Exploring the Morphology and Origins of the 4C 38.41 Jet

Ist Teil von

• The Astrophysical journal, 2019-12, Vol.886 (2), p.85

Ort / Verlag

Philadelphia: The American Astronomical Society

Erscheinungsjahr

2019

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• We study the properties of the innermost jet of the flat spectrum radio quasar 1633+382 (4C 38.41) based on very long baseline interferometry (VLBI) data from the radio monitoring observations of the Boston University VLBI program at 43 GHz. Analysis of the components suggests a semi-parabolic jet geometry with jet radius R following the relation R ∝ r0.7 with distance r, with indications of a jet geometry break toward a conical geometry. Brightness temperature falls with distance following TB ∝ r−2.1. Combining this information, magnetic field and electron densities are found to fall along the jet as B ∝ r−1.5 and n ∝ r−1.1, respectively, suggesting that the magnetic configuration in the jet may be dominated by the poloidal component. Our analysis of the jet structure suggests that the innermost jet regions do not follow a ballistic trajectory and, instead, match a sinusoidal morphology, which could be due to jet precession from a helical pattern or Kelvin-Helmholtz instabilities.