VLBI observations of 3C 279 at 230GHz Virtual Observatory Resource

Authors
  1. Lu R.-S.
  2. Fish V.L.
  3. Akiyama K.
  4. Doeleman S.S.
  5. Algaba J.C.
  6. Bower G.C.,Brinkerink C.
  7. Chamberlin R.
  8. Crew G.
  9. Cappallo R.J.
  10. Dexter M.
  11. Freund R.,Friberg P.
  12. Gurwell M.A.
  13. Ho P.T.P.
  14. Honma M.
  15. Inoue M.
  16. Jorstad S.G.,Krichbaum T.P.
  17. Loinard L.
  18. MacMahon D.
  19. Marrone D.P.
  20. Marscher A.P.,Moran J.M.
  21. Plambeck R.
  22. Pradel N.
  23. Primiani R.
  24. Tilanus R.P.J.
  25. Titus M.,Weintroub J.
  26. Wright M.
  27. Young K.H.
  28. Ziurys L.M.
  29. Published by
    CDS
Abstract

We report results from five day very long baseline interferometry (VLBI) observations of the well-known quasar 3C 279 at 1.3mm (230GHz) in 2011. The measured nonzero closure phases on triangles including stations in Arizona, California, and Hawaii indicate that the source structure is spatially resolved. We find an unusual inner jet direction at scales of ~1pc extending along the northwest-southeast direction (P.A.=127{deg}+/-3{deg}), as opposed to other (previously) reported measurements on scales of a few parsecs showing inner jet direction extending to the southwest. The 1.3mm structure corresponds closely with that observed in the central region of quasi-simultaneous super-resolution Very Long Baseline Array images at 7mm. The closure phase changed significantly on the last day when compared with the rest of observations, indicating that the inner jet structure may be variable on daily timescales. The observed new direction of the inner jet shows inconsistency with the prediction of a class of jet precession models. Our observations indicate a brightness temperature of ~8x10^10^K in the 1.3mm core, much lower than that at centimeter wavelengths. Observations with better uv coverage and sensitivity in the coming years will allow the discrimination between different structure models and will provide direct images of the inner regions of the jet with 20-30{mu}as (5-7 light months) resolution.

Keywords
  1. quasars
  2. millimeter-astronomy
  3. submillimeter-astronomy
  4. interferometry
Bibliographic source Bibcode
2013ApJ...772...13L
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/772/13
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/772/13
Document Object Identifer DOI
doi:10.26093/cds/vizier.17720013

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http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/772/13
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History

2015-02-25T12:04:37Z
Resource record created
2015-02-25T12:04:37Z
Created
2023-07-27T06:38:58Z
Updated

Contact

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CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
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cds-question@unistra.fr