Download presentation
Presentation is loading. Please wait.
1
BLACK HOLE Movie courtesy Wolfgang Steffen, University Guadalajara, Mexico
2
QUASAR-MICROQUASAR ANALOGY The scales of length and time are proportional to M BH R sh = 2GM BH /c 2 ; T M BH The maximum color temperature of the accretion disk is T col M/ 10M ) -1/4 MICROQUASARS HAD TO WAIT THE ERA OF HIGH ENERGY ASTROPHYSICS QUASAR MICROQUASAR BASED ON PHYSICS, NOT JUST ON MORPHOLOGY Mirabel & Rodriguez, Nature 1998
3
SUPERLUMINAL MOTIONS IN QSOs & AGN OBSERVED IN ~ 30 QSOs & AGN IN RADIO & OPTICAL WAVES PROPER MOTION SEEN IN YEARS V app UP TO 20c WHAT IS THE NATURE ? “PLASMONS” OR SHOCKS ?
4
A SUPERLUMINAL EJECTION IN A QSO AT THE TIME OF A SUDDEN DIP IN THE 20-100 KeV FLUX 1 arcsec VLA V app = 1.3c DISTANCE = 12.5 Kpc cm THE PLASMA THAT RADIATES IN THE HARD X-RAYS IS BLOWN IN SUPERLUMINAL JETS
5
SUPERLUMINAL MOTIONS IN THE GALAXY 1)MOVE ON THE PLANE OF THE SKY ~10 3 TIMES FASTER 2)JETS ARE TWO-SIDED WHICH ALLOWS TO SOLVE EQUATIONS 3)BETTER AGN AT <100 Mpc. e.g. Collimation @ 30-100 R sh in M87 (Biretta) WITH SAME BULK LORENTZ FACTORS AS IN QSOs Mirabel & Rodriguez, 1994
6
GRS 1915+105: EJECTION EVENTS VLA (Rodriguez & Mirabel, 1999) Fireballs (Mezaros & Rees) versus Cannonballs (Daar & De Rujula) Also with MERLIN (Fender et al. 01) Bulk = (1 –
7
RELATIVISTIC ABERRATION IN ANTISYMMETRIC TWIN JETS Relativistic upper limit: D < 14 kpc Same bulk Lorentz factors as in QSOs: 2-10
8
RELATIVISTIC METHOD FOR DISTANCES IN ASTRONOMY IF ANTISYMMETRIC, THE VELOCITY, DIRECTION OF THE JETS, & DISTANCE TO THE SOURCE CAN BE FOUND. BUT SPECTRAL LINES SO FAR DIFFICULT TO DETECT, EXCEPT SS 433 WHERE H, He, AND Fe LINES ARE FOUND IF THE JETS ARE DOMINATED BY ELECTRON-PROTON PLASMA: FROM PROPER MOTIONS FROM DOPPLER FACTOR OF ION LINES
9
LARGE-SCALE JETS (W50/SS433) CHANDRA : ARC-SEC TWO-SIDED JET OUTFLOW (Migliari & Fender) Material half a year downstream is reheated to T > 10 7 K and re-accelerated ASCA: HADRONIC JETS WITH V = 0.26c IN THE X-RAYS Small scale version of Cygnus A ? POTENTIAL SOURCES OF TeV NEUTRINOS (Waxman et al.; Guetta et al.) >10 16 eV protons interact with synchrotron photons 1-100 TeV neutrino emission VLA cm: Dubner, Goss, Mirabel) ROSAT X-rays: (Brinkmann,Aschenbach, Kawai) 1 o = 60 pc
10
RECENT HIGHLIGHT FROM CHANDRA (Presented at the fourth Microquasar workshop in Corsega…next in China) MOVING X-RAY JETS IN THE QSO XTE J1550-564 (Corbel et al) mas/day V app = (0.34-0.93)c Possible deceleration Synchrotron spectrum
11
~20 QUASARS IN THE GALAXY (Mirabel & Rodriguez, ARAA 1999)
12
HORIZON IS THE BASIC CONCEPT THAT DEFINES A “BLACK HOLE” But because an horizon cannot be “seen” or “touch” it is not possible to “demonstrate” the existence of a black hole…however during simultaneous multiwavelength observations we found… A STRIKING ABSCENCE OF EVIDENCE FOR A MATERIAL SURFACE IN A COMPACT OBJECT THAT HAS MASS
13
à neutrons t combustion > t chute
14
ACCRETION – JET CONNECTION MATTER RADIATING IN X-RAYS GOES BEYOND THE HORIZON ? JETS APPEAR ~5 MIN AFTER DISAPPEARANCE OF THE INNER DISK ABSENCE OF EVIDENCE FOR A MATERIAL SURFACE T M BH
15
QSO 3C 120 AS A SCALE-UP QSO THE JETS ALSO APPEAR SHORTLY AFTER SUDDEN X-RAY DIPS Marscher et al. Nature 2002 T QSO / T QSO ~ 5x10 5 whereas M QSO / M QSO ~ 5x10 6 But these differences are small compared with data uncertainties
16
ACCRETION AND EJECTION IN 3C 120 Marscher et al. Nature 2002
Similar presentations
© 2024 SlidePlayer.com. Inc.
All rights reserved.