X-ray variability in M87

Abstract

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 knot A appears to have decreased by 16% between 92Jun and 95Dec. Although the core variability is consistent with general expectations for AGN nuclei, the changes in knot A provide constraints on the x-ray emission process and geometry. Thus we predict that the x-ray morphology of knot A will differ significantly from the radio and optical structure.

9 pages latex plus 6 ps figs. To appear in Monthly Notices of the RAS

Cited by in corpus (27)

• A High Resolution X-ray Image of the Jet in M 87
• Low radiative efficiency accretion in the nuclei of elliptical galaxies
• Radiative efficiency, variability and Bondi accretion onto massive black holes: from mechanical to quasar feedback in brightest cluster galaxies
• Chandra X-ray Imaging and Spectroscopy of the M87 Jet and Nucleus
• A Chandra observation of the X-ray environment and jet of 3C31
• Inside the Bondi radius of M87
• Chandra observations of the X-ray jet in 3C66B
• ROSAT X-ray observations of 3CRR radio sources
• The Optical-Near-IR Spectrum of the M87 Jet From HST Observations
• HST observations of nearby radio-loud early-type galaxies
• High Energy gamma-rays From FR I Jets
• Month-Timescale Optical Variability in the M87 Jet
• On Multiwavelength Emission of Large-Scale Quasar Jets
• Hard X-ray emission from elliptical galaxies
• On the Magnetic Field in the Kiloparsec-Scale Jet of Radio Galaxy M 87
• M87: A Misaligned BL LAC?
• Variability and Proper Motion of X-ray Knots in the Jet of Centaurus A
• Detection of Superluminal Motion in the X-Ray Jet of M87
• Are Cen a and M87 Tev Gamma-Ray Sources?
• X-ray Emission from the Radio Jet in 3C 120
• Spectrum of two component flows around a super-massive black hole: an application to M87
• Probing the central black hole in M87 with gamma-rays
• FUV line emission, gas kinematics, and discovery of [Fe XXI] $\lambda$1354.1 in the sightline towards a filament in M87
• Direct time radio variability induced by non-axisymmetric standing accretion shock instability: implications for M87
• X-ray Images of Hot Accretion Flows
• The Large Scale X-ray Emission from M87
• Multifrequency Radiation of Extragalactic Large-Scale Jets