Multiwavelength monitoring of the enigmatic Narrow-Line Seyfert 1 PMN J0948+0022 in March-July 2009
Idioma
en
Article de revue
Este ítem está publicado en
The Astrophysical Journal. 2009-12-10, vol. 707, p. 727-737
American Astronomical Society
Resumen en inglés
Following the recent discovery of gamma rays from the radio-loud narrow-line Seyfert 1 galaxy PMN J0948+0022 (z=0.5846), we started a multiwavelength campaign from radio to gamma rays, which was carried out between the end ...Leer más >
Following the recent discovery of gamma rays from the radio-loud narrow-line Seyfert 1 galaxy PMN J0948+0022 (z=0.5846), we started a multiwavelength campaign from radio to gamma rays, which was carried out between the end of March and the beginning of July 2009. The source displayed activity at all the observed wavelengths: a general decreasing trend from optical to gamma-ray frequencies was followed by an increase of radio emission after less than two months from the peak of the gamma-ray emission. The largest flux change, about a factor of about 4, occurred in the X-ray band. The smallest was at ultraviolet and near-infrared frequencies, where the rate of the detected photons dropped by a factor 1.6-1.9. At optical wavelengths, where the sampling rate was the highest, it was possible to observe day-scale variability, with flux variations up to a factor of about 3. The behavior of PMN J0948+0022 observed in this campaign and the calculated power carried out by its jet in the form of protons, electrons, radiation and magnetic field are quite similar to that of blazars, specifically of flat-spectrum radio quasars. These results confirm the idea that radio-loud narrow-line Seyfert 1 galaxies host relativistic jets with power similar to that of average blazars.< Leer menos
Palabras clave
galaxies: active
gamma rays: observations
infrared: galaxies
quasars: individual (PMN J0948+0022)
radio continuum: galaxies
ultraviolet: galaxies
X-rays: galaxies
Orígen
Importado de HalCentros de investigación
Publicaciones correspondientes
Mostrar publicaciones relacionadas por título, autor, creador y materia
-
Star Formation Efficiency at Intermediate Redshift
COMBES, F.; GARCÍA-BURILLO, S.; BRAINE, J. ...Communication dans un congrès -
Monitoring the Bidirectional Relativistic Jets of the Radio Galaxy 1946+708
TAYLOR, G. B.; CHARLOT, P.; VERMEULEN, R. C. ...(The Astrophysical Journal. vol. 698, n° 2, pp. 1282-1291, 2009)Article de revue