M87 at metre wavelengths

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NGC 4388 Sy 1 NGC 4407 M58 Sy 2 NGC 4567 NGC 4568 merging? NGC 4438 distorted disk LINER M90 Sy NGC 4402 M88 Sy 2
Conclusions: • Virgo A extended halo is an active and living source • Down to 25 MHz no previously unseen steep-spectrum features were detected • Steepening in the low-frequency end of the spectra can be connected to adiabatic expansion of the plasma bubble • Magnetic field strength ≃10 μG found in the flow regions, and of ≃7 μG in the halo regions • Pressure generated by the plasma and the magnetic fields less than what required to sustain the halo. Probably, thermal gas plays a role in sustaining the halo. • Synchrotron aging analysis provided a global halo age of ≃40 Myr • Estimate jet power P≃6−10e44 erg/s. 10 to 100 times higher than the X-ray luminosity due to cooling flow
Page 1 and 2: Leiden - 15/05/2012 M87 at metre wa
Page 3 and 4: M90 NGC4435 NGC4402 NGC4438 M86 M84
Page 6 and 7: Virgo A (3C274) Flux: ~1700 Jy @ 10
Page 14 and 15: M87 LBA map: RMS: 0.6 Jy/beam Beam:
Page 16 and 17: M87 - spectral index Low-freq Spect
Page 18 and 19: M87 - Core Spectral index analysis:
Page 20 and 21: Slope of injected electrons fixed t
Page 22 and 23: M87 - Results Discrepancy with dyna
Page 24 and 25: The Virgo Campaign 2011 LOFAR Obser
Page 26 and 27: The Virgo Campaign 2011 LOFAR Obser
Page 29: M88 NGC4402 M90 NGC4438 M58 NGC4388
Page 33 and 34: JP Model ⌫ b / 1 t 2 B 3
Page 35 and 36: M87 - Jet Power dU int dt = P ⌘ p
Page 37 and 38: The Calibration Vir A
Page 39: The Calibration Vir A Cyg A Cas A D

M87 at metre wavelengths

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