X-ray variability and emission process of the radio jet in M87
نویسندگان
چکیده
منابع مشابه
X - ray Variability and Emission Process of the Radio Jet in M 87
We monitored the M87 jet with the ACIS-S detector on Chandra with 5 observations between 2002 Jan and 2002 Jul. Our goal was to determine the presence and degree of variability in morphology, intensity, and spectral parameters. We find strong variability of the core and HST-1, the knot lying 0.8 from the core. These observations were designed to constrain the X-ray emission process: whereas syn...
متن کاملX-ray Emission Diagnostics from the M87 Jet
The M87 jet is the nearest (16 Mpc, giving a scale of 1 = 78 pc) and highest surfacebrightness jet in the optical, radio and X-rays. As such it makes an excellent prototype for studying jet physics. The jet shows only modest differences in morphology between the optical and radio: in the optical the jet appears knottier and is more concentrated along the centerline (Sparks, Biretta & Macchetto ...
متن کاملX-ray Variability in M87
We present the evidence for X-ray variability from the core and from knot A in the M87 jet based on data from two observations with the Einstein Observatory High Resolution Imager (HRI) and three observations with the ROSAT HRI. The core intensity showed a 16% increase in 17 months ('79-'80); a 12% increase in the 3 years '92 to '95; and a 17% drop in the last half of 1995. The intensity of kno...
متن کاملSuperluminal Radio Features in the M87 Jet and the Site of Flaring Tev Gamma-ray Emission
Superluminal motion is a common feature of radio jets in powerful γ-ray emitting active galactic nuclei. Conventionally, the variable emission is assumed to originate near the central supermassive black-hole where the jet is launched on parsec scales or smaller. Here, we report the discovery of superluminal radio features within a distinct flaring X-ray emitting region in the jet of the nearby ...
متن کاملX-ray Emission from the Radio Jet in 3c 120
We report the discovery of X-ray emission from a radio knot at a projected distance of 25′′ from the nucleus of the Seyfert galaxy, 3C 120. The data were obtained with the ROSAT High Resolution Imager (HRI). Optical upper limits for the knot preclude a simple power law extension of the radio spectrum and we calculate some of the physical parameters for thermal bremsstrahlung and synchrotron sel...
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ژورنال
عنوان ژورنال: New Astronomy Reviews
سال: 2003
ISSN: 1387-6473
DOI: 10.1016/s1387-6473(03)00106-4