SIMBAD references

2011A&A...528L..11G - Astronomy and Astrophysics, volume 528, L11-11 (2011/4-1)

Global e-VLBI observations of the gamma-ray narrow line Seyfert 1 PMN J0948+0022.

GIROLETTI M., PARAGI Z., BIGNALL H., DOI A., FOSCHINI L., GABANYI K.E., REYNOLDS C., BLANCHARD J., CAMPBELL R.M., COLOMER F., HONG X., KADLER M., KINO M., VAN LANGEVELDE H.J., NAGAI H., PHILLIPS C., SEKIDO M., SZOMORU A. and TZIOUMIS A.K.

Abstract (from CDS):

There is growing evidence of relativistic jets in radio-loud narrow-line Seyfert 1 (RL-NLS1) galaxies. We constrain the observational properties of the radio emission in the first RL-NLS1 galaxy ever detected in gamma-rays, PMN J0948+0022, i.e., its flux density and structure in both total intensity and polarization, its compactness, and variability. We performed three real-time e-VLBI observations of PMN J0948+0022 at 22GHz, using a global array including telescopes in Europe, East Asia, and Australia. These are the first e-VLBI science observations ever carried out with a global array, reaching a maximum baseline length of 12458km. The observations were part of a large multiwavelength campaign in 2009. The source is detected at all three epochs. The structure is dominated by a bright component, more compact than 55µas, with a fainter component at a position angle θ∼35°. Relativistic beaming is required by the observed brightness temperature of 3.4x1011K. Polarization is detected at a level of about 1%. The parameters derived by the VLBI observations, in addition to the broad-band properties, confirm that PMN J0948+0022 is similar to flat spectrum radio quasars. Global e-VLBI is a reliable and promising technique for future studies.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: Seyfert - galaxies: jets - instrumentation: high angular resolution - instrumentation: interferometers

Simbad objects: 8

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2011A&A...528L..11G and select 'bookmark this link' or equivalent in the popup menu


2019.10.16-00:56:36

© Université de Strasbourg/CNRS

    • Contact