Nearly Periodic Fluctuations in the Long Term X-ray Light Curves of the Blazars AO 0235 164 and 1ES 2321 419 - Astrophysics > Cosmology and Nongalactic AstrophysicsReportar como inadecuado




Nearly Periodic Fluctuations in the Long Term X-ray Light Curves of the Blazars AO 0235 164 and 1ES 2321 419 - Astrophysics > Cosmology and Nongalactic Astrophysics - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: We have performed a structure function analysis of the Rossi X-ray TimingExplorer All Sky Monitor data to search for variability in 24 blazars usingdata trains that each exceed 12 years. Although 20 of them show nominal periodsthough this technique, the great majority of these `periods- are clearlyrelated to yearly variations arising from the instrument.Nonetheless, anapparently real periodic component of about 17 days was detected for the blazarAO 0235+164 and it was confirmed by discrete correlation function andperiodogram analyses. For 1ES 2321+419 a component of variability with a nearperiodicity of about 420 days was detected by all of these methods. We discussseveral possible explanations for these nearly periodic components and concludethat they most likely arise from the intersections of a shock propagating downa relativistic jet that possesses a helical structure.



Autor: Bindu Rani 1, Paul J. Wiita 2,3, Alok C. Gupta 1 1 ARIES, India 2 Princeton, USA 3 GSU, Atlanta, USA

Fuente: https://arxiv.org/







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