Astrophysical Outflows and Associated Accretion Phenomena

Scientific Rationale

2008-10-04T06:37:00.000-07:00

Highly collimated supersonic jets and outflows are very frequent in several astrophysical environments. They are seen in young stellar objects (YSOs), proto-planetary nebulae, compact objects (like galactic black holes or microquasars, and X-ray binary stars), active galactic nuclei, and are also possibly associated to gamma-ray bursts (GRBs), the most energetic events in the Universe, and to ultra-high energy cosmic rays sources (UHECRs). Despite their different physical scales, all these outflow classes have strong morphological similarities, but questions like - what physics do they share? - or - can we find a universal mechanism of acceleration and collimation that operates in all classes? - remain a matter of debate.
The most accepted mechanism for their origin relies on a rotating accretion disk threaded by perpendicular large-scales magnetic fields and, though most of the systems producing jets contain an accretion disk around the central source, the real role that rotation and magnetic fields play on these processes is still not fully understood, nor the highly non-linear physical processes connected to these jet-disk systems in the large parameter space involved.
Recent years have been marked by worldwide reviving interest in the studies of magnetic disk accretion and outflows both because of their potential relation to several astrophysical phenomena that are not well understood yet like GRBs and UHECRs, and also because of the fast advance in multi-dimensional computational modeling of these systems and the large improvement in the observations with the building of new instrumentation and techniques that allow to resolve some outflows bases very near the sources and combine multi-wavelength data. We thus believe it is time to revive the discussion of the origin of the astrophysical jets and their effects on the astrophysical environments.
The main scientific goals of the meeting will focus on understanding the driving mechanisms of jets from proto-stars (including their possible crucial link with star and planet formation) to microquasars and AGNs trying to emphasize their differences/similarities; the basic physics of the accretion-jet process in magnetized disks, which is not fully understood yet in the large parameter space involved, including the transport of angular momentum and the development of reconnection and turbulent dynamo; cooling/heating processes, instabilities, shock structures and particle acceleration mechanisms in the jets; the impact of the jets on energy balance and turbulence feeding in the astrophysical environments; and the potential association of jet-accretion phenomena with GRBs and UHECRs.

Important Dates

2008-10-03T00:43:00.000-07:00

The ABSTRACT submission will be opened until MARCH 15, 2009

The EARLY REGISTRATiON will be opened until MAY 1, 2009.

Contact Addresses

2008-10-02T05:39:00.001-07:00

Contact and information about the IAU Joint Discussion 7 "Astrophysical Outflows and Associated Accretion Phenomena" may be obtained at iaujd.outflows@gmail.com

Contact and information about the General Assembly may be obtained at astronomy2009@jz.com.br

Registration

2008-10-02T05:38:00.004-07:00

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Invited Speakers

2008-10-02T05:38:00.003-07:00

T. Belloni "QPO-Jet relation in X-ray binaries and AGNs" (Italy)

P. L. Biermann “Is there an UHECRs-AGN connection?” (Germany) (TBC)

M. Birkinshaw “Extragalactic jet observations from radio to X-ray/acceleration” (UK)

S. Cabrit “Jet-accretion connection in YSOs” (France)

M. Camenzind “Theory of relativistic jets” (Germany)

E. de Gouveia Dal Pino “Magnetic Reconnection in accretion disks/coronae and jet launching” (Brazil)

A. Dutrey “ALMA and LOFAR in the context of accretion disks” (France)

A. Ferrari “Extragalactic jets simulations” (Italy)

J. Hawley “Numerical simulations of MHD accretion disks” (USA)

A. King “Jet-accretion disk physics: from transport to dynamo processes” (UK)

P. Meszaros “Jets in GRBs” (USA)

F. Mirabel “Accretion/Jet connection in black holes – observations” (Chile)

R. Narayan “Accretion disks theory” (USA)

A. Raga “YSO jet simulations” (Mexico)

T. Ray “YSO jets rotation and magnetic field observations” (Ireland)

L. F. Rodriguez “YSO radio and milimmetric observations” (Mexico)

B. Reipurth “YSO jets optical observations” (USA)

K. Shibata “Numerical MHD simulations of Astrophysical Jets” (Japan)

F. Shu “Star formation-jet connection” (Taiwan-US)

N. Soker “ Are jets rotating at the launching?” (Israel)

T. Storchi-Bergmann “AGN accretion disk observations” (Brazil)

Scientific Program

2008-10-02T05:38:00.001-07:00

Program Schedule

I: Invited Speaker
O: oral contribution

Thursday 6 August 09:00 - 17:30

09:00 Opening E. M. de Gouveia Dal Pino (Brazil) & A. Raga (Mexico)

09:05 - 10:30 session 1 “Jet/Accretion Disk systems: basic physics”
09:05 J. F. Hawley (USA) “Numerical simulations of MHD accretion disks” (I)
09:30 A. King (UK) “Accretion in Active Galactic Nuclei” (I)
09:55 E.T. Vishniac (Canada) “The Magnetorotational Dynamo in Accretion Disks” (O)
10:15 Panel/Poster Discussion

10:30 - 11:00 break and poster session

11:00 - 12:30 session 2 “Jet observations in all scales”
11:00 A. Dutrey (France) “Accretion Disks unveiled by the new Generation of cm to submm Arrays” (I)
11:20 T. Ray (Ireland) “Primeval Jets” (I)
11:40 T. M. Belloni (Italy) “QPO-Jet relation in X-ray binaries" (I)
12:00 T. Storchi-Bergmann (Brazil) “Outflows in nearby AGN and their relation with radio jets” (I)
12:20 Panel/Poster Discussion

12:30 - 14:00 lunch

14:00 - 15:30 session 3 “Jet launching”
14:00 K. Shibata (Japan) “Numerical MHD simulations of Astrophysical Jets: How are jets launched and accelerated ?” (I)
14:20 E. M. de Gouveia Dal Pino (Brazil) “The role of Magnetic Reconnection at the jet launching basis” (I)
14:40 N. Soker (Israel) “Are jets rotating at the launching?” (I)
15:00 H. Falcke , G. C. Bower , S. Markoff , C. F. Gammie , S. Doeleman (Netherlands/USA) “Jet-launching in action: new lessons from the Galactic Center black hole Sgr A*" (O)
15:15 Panel/Poster Discussion

15:30 - 16:00 break and poster session

16:00 - 17:30 session 4 “Jet Propagation and interaction with environment in all scales”
16:00 V. de Souza , P. L. Biermann (Brazil/Germany) “On the correlation of the highest energy cosmic rays with AGNs” (I)
16:20 A. Ferrari, P. Rossi, G. Bodo , A. Mignone (Italy) “High-resolution simulations of 3D relativistic magnetized jets” (I)
16:40 A. C. Raga (Mexico) “Variable jets from young stars” (I)
17:00 Panel/Poster Discussion

Friday 7 August 09:00 - 12:30

09:00 - 10:30 session 1 “Jets from YSOs”
09:00 L. F. Rodriguez (Mexico) “Radio and Millimeter Observations of YSOs” (I)
09:20 S. Lizano, F. H. Shu (Mexico/Taiwan/USA) “Connection between Star Formation and Jets” (I)
09:40 S. Cabrit, J. Ferreira , C. Dougados , P. Garcia (France/Portugal) “The Jet-accretion connection in YSOs” (I)
10:00 Panel/Poster Discussion

10:30 - 11:00 break and Poster Session

11:00 - 12:30 session 2 “Relativistic Jets: GRBs, BHs; AGNS; New generation instruments”
11:00 P. Meszaros, X. Wu (USA/China) “Jets in GRBs” (I)
11:20 F. Mirabel (Argentina/France) Accretion-Jet connection in black holes” (I)
11:40 M. C. B. Young , M. Elvis , G. Risalit (USA/Italy) “A New Understanding of the Relation Between X-ray and Optical Emission in Quasars” (O)
11:55 N. D. Kylafis (Greece) "Jets from Compact X-ray Sources" (O)

12:10 Panel Discussion: Summary and Concluding Remarks A. Raga & E. M. de Gouveia Dal Pino

12:30 Closure

Scientific Organizing Committee

2008-10-02T05:37:00.002-07:00

E. M. de Gouveia Dal Pino (Brazil) (chair)
A. Raga (México) (chair)
M. Birkinshaw (England)
S. Cabrit (France)
M. Camenzind (Germany)
A. Cerqueira (Brazil)
A. Ferrari (Italy)
F. Mirabel (Chile)
T. Ray (Ireland)
L. Felipe Rodriguez (México)
R. Narayan (USA)
K. Shibata (Japan)
J. Stone (USA)
T. Storchi-Bergmann (UFRGS, Brazil)