According to unified schemes for Active Galactic Nuclei, low-power, Fanaroff-Riley type I (FR I), radio galaxies are thought to be BL Lacs with their jets pointing at relatively large angles with respect to the line of sight. X-ray observations of FR I sources can test this scenario and constrain the presence of obscuring material around the nucleus. In this paper we discuss the X-ray properties of three FR I radio galaxies 3C 78, OH-342 and PKS 0620-52, observed with the BeppoSAX satellite in the 0.2-10 keV energy range. The narrow-field instruments on board BeppoSAX have detected extended thermal X-rap emission from a hot galactic corona (3C 78) and intracluster gas (OH-342 and PKS 0620-52). However, a detailed spectral analysis suggests that a non-thermal (likely nuclear) component can also significantly contribute to the total flux, especially in the case of 3C 78 and OH-342. This emission from the central region appears basically unabsorbed, in agreement with observations in other bands. The X-ray spectral luminosity of the nucleus of these three objects is correlated with the radio core luminosity, consistently with previous data on other FR I radio galaxies.

Trussoni, E., Vagnetti, F., Massaglia, S., Feretti, L., Parma, P., Morganti, R., et al. (1999). X-ray observations of low-power FR I radio galaxies. ASTRONOMY & ASTROPHYSICS, 348(2), 437-445.

X-ray observations of low-power FR I radio galaxies

VAGNETTI, FAUSTO;
1999

Abstract

According to unified schemes for Active Galactic Nuclei, low-power, Fanaroff-Riley type I (FR I), radio galaxies are thought to be BL Lacs with their jets pointing at relatively large angles with respect to the line of sight. X-ray observations of FR I sources can test this scenario and constrain the presence of obscuring material around the nucleus. In this paper we discuss the X-ray properties of three FR I radio galaxies 3C 78, OH-342 and PKS 0620-52, observed with the BeppoSAX satellite in the 0.2-10 keV energy range. The narrow-field instruments on board BeppoSAX have detected extended thermal X-rap emission from a hot galactic corona (3C 78) and intracluster gas (OH-342 and PKS 0620-52). However, a detailed spectral analysis suggests that a non-thermal (likely nuclear) component can also significantly contribute to the total flux, especially in the case of 3C 78 and OH-342. This emission from the central region appears basically unabsorbed, in agreement with observations in other bands. The X-ray spectral luminosity of the nucleus of these three objects is correlated with the radio core luminosity, consistently with previous data on other FR I radio galaxies.
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/05 - Astronomia e Astrofisica
English
Con Impact Factor ISI
Galaxies: active; Galaxies: individual: 3C 78; OH-342; PK0620-52; Galaxies: nuclei
http://adsabs.harvard.edu/abs/1999A%26A...348..437T
Trussoni, E., Vagnetti, F., Massaglia, S., Feretti, L., Parma, P., Morganti, R., et al. (1999). X-ray observations of low-power FR I radio galaxies. ASTRONOMY & ASTROPHYSICS, 348(2), 437-445.
Trussoni, E; Vagnetti, F; Massaglia, S; Feretti, L; Parma, P; Morganti, R; Fanti, R; Padovani, P
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/44723
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