Query : 2001A&A...371...93X

2001A&A...371...93X - Astronomy and Astrophysics, volume 371, 93-96 (2001/5-3)

A new mechanism for soft X-ray excess in NGC 5548.

XIA T.-S. and ZHANG J.-L.

Abstract (from CDS):

Many active galaxies exhibit soft X-ray excess in the 0.2-2keV band with a photon index αs∼2.38±0.25, much higher than that of the hard X-ray (2-10keV) band with αh∼1.7. Different theoretical models have been proposed to reproduce and explain the spectra, but the complexity of all these models tends to make the situation even more confused. Here we present results using our newly-proposed synchro-curvature mechanism, which we show can reproduce the soft X-ray excess by a simple fitting process. Such a model may be helpful in considering the physical processes taking place in these objects.

Abstract Copyright:

Journal keyword(s): galaxies: individual: NGC 5548 - radiation mechanisms: non-thermal - magnetic fields - X-rays: galaxies

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 NGC 5548 Sy1 14 17 59.5400291832 +25 08 12.603122268   14.35 13.73     ~ 2646 0
2 Mrk 841 Sy1 15 04 01.1935384104 +10 26 15.780409692   14.50 14.27     ~ 635 0

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