The jet of Mrk 501 The jet of Mrk 501 from millions of from millions of Schwarzschild radii Schwarzschild radii down to a few hundreds down to a few hundreds Marcello Giroletti Marcello Giroletti INAF Istituto di Radioastronomia INAF Istituto di Radioastronomia and and G. Giovannini, G. Taylor, B. G. Giovannini, G. Taylor, B. Cotton Cotton M.Perez Torres, P. Edwards, M. M.Perez Torres, P. Edwards, M. Chiaberge Chiaberge
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The jet of Mrk 501 from millions of Schwarzschild radii down to a few hundreds
The jet of Mrk 501 from millions of Schwarzschild radii down to a few hundreds. Marcello Giroletti INAF Istituto di Radioastronomia and G. Giovannini, G. Taylor, B. Cotton M.Perez Torres, P. Edwards, M. Chiaberge. Outline. Introduction Observations & results High sensitivity: HSA - PowerPoint PPT Presentation
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The jet of Mrk 501 from The jet of Mrk 501 from millions of Schwarzschild radii millions of Schwarzschild radii
down to a few hundredsdown to a few hundreds
Marcello GirolettiMarcello GirolettiINAF Istituto di RadioastronomiaINAF Istituto di Radioastronomia
andandG. Giovannini, G. Taylor, B. CottonG. Giovannini, G. Taylor, B. Cotton
M.Perez Torres, P. Edwards, M. ChiabergeM.Perez Torres, P. Edwards, M. Chiaberge
Outline
IntroductionObservations & results
− High sensitivity: HSA− High resolution: VSOP1 & Global mm-VLBI Array
Open questions & perspectivesSummary
Markarian 501
BL Lac @ z = 0.034, HBL high energy:
− detected by EGRET and TeV Cherenkov
− highly active/variable− SSC models require high
(>10) Doppler factor radio
− S5 GHz = 1 Jy
− VLA: two sided− pc scales: one sided-jet,
twisting
Alb
ert
et a
l. 20
07C
assa
ro e
t al
. 19
99
High Sensitivity Array (HSA)
The High Sensitivity Array:− VLBA (10x25m)− phased VLA (27x25m)− Arecibo (300m)− Green Bank (110m)− Effelsberg (100m)− 7x more sensitive than the