Lorentz Center - Magnetic Fields in Galaxies from 5 Jul 2004 through 8 Jul 2004
  Current Workshop  |   Overview   Back  |   Home   |   Search   |     

    Magnetic Fields in Galaxies
    from 5 Jul 2004 through 8 Jul 2004

Monday, July 5

Monday, July 5

09:00               Welcome Lorentz Center

09:10               Why this Workshop? – Peter Katgert

09:25               K. Subrahmanian: Nonlinear restrictions on the galactic dynamo

                        R. Beck: Observations of the large-scale field                                 

D. Sokoloff: Cosmological magnetic fields and galactic dynamo

10:45               Coffee/Tea in Common Roo

11:15               K. Otmianowska: Magnetic field evolution in interacting galaxies

                        M. Hanasz: Cosmic-ray driven dynamo in galactic disks

                        J. Brown: Observations of the galactic magnetic field from the IGPS

R. Stepanov: Reconstruction of the galactic magnetic field from combined

analysis of pulsar and extragalactic rotation measures

D. Mitra: How robust are pulsar and extragalactic rotation measures

12:45               Lunch at Gorlaeus Canteen

15:00               I. Patrickeyev: An iterative algorithm for RM-tomography of the galactic

magnetic field

                        W.Reich: Observational needs to trace galactic disk fields

                        M. Wolleben: A new polarization survey and a model for the galactic


15:50               Coffee/Tea

16:20               Plenary discussion on Models for and observations of the large-field


                        Possible questions:

·         What are the predictions of the current best models for their origin, evolution and the time-scales involved ?

·         What is the connection with the intergalactic (or intragalactic) field ?

·         What determines the strengths of the large- (and small-) scale fields in the models, and how does that compare to the observed values ?

·         Is there evidence for field asymmetries w.r.t. the galactic plane ?

·         Field reversals; are they real and, if so, what is their scale and origin?

·         What do we know about the magnetic field in the halo, and its connection to the field in the disk ?


17:30               Wine and Cheese Party (free of charge) in Common Room



Tuesday, July 6

09:00   C. Vogt: A Bayesian view on Faraday rotation maps

T. Ensslin: Galaxy cluster magnetic fields

            M. Brentjens: Application of RM-synthesis to the Perseus Cluster

M. Johnston-Hollit: Large-scale structure in magnetic fields as inferred by extra-galactic Faraday rotation measures

A.      Shukurov: The effects of spiral arms on the large-scale magnetic field

10:35   Coffee/Tea

11:00   J. Han: New model for galactic magnetic fields from pulsar RMs: new picture about B-fields and spiral arms

            J. Franco: Structuring a magentized thick gaseous disk

A.      Fletcher: Spiral arms and the orientation of the regular magnetic field in M51

R. Braun: RM-synthesis Observations of Spiral Galaxy Disks

A. Snodin: Detailed modelling of magnetic fields in the barred galaxy NGC 1365

12:45   Lunch

14:15   Plenary discussion on Relation between the large-scale field and the arms

            Possible questions:

·         How do the field and the gas flow interact, and what do the observations and models tell us about that interaction?

·         How well are the fields aligned with the spiral arms, and how does alignment come about?


15:00   E. Vasquez-S.: Turbulence in the ISM

            M. Korpi: On the role of the magnetorotational instability for cool and thin

galactic disks

16:00   Coffee/Tea

16:30   D. Sokoloff: Theory of the small-scale field in the ISM

            K. Subrahmanian: How does the fluctuation dynamo saturate

            J. Han: The spatial energy spectrum of galactic magnetic fields

            M. Haverkorn: Turbulence in the warm ionized medium of inner galactin plane


Wednesday, July 7

09:00   T. Landecker: What do radio observations tell us about the small-scale properties of the magneto-ionic medium

            M. Haverkorn: Observations of the small-scale field in the ISM

            K. Chyzy: Magnetic fields in the violent galactic environment

            F. Heitsch: Systematic effects in field measurements from polarimetry and Zeeman measurements

            J. Brown: Observational evidence for the non-isotropy of the small-scale field

            M. de Avillez: Global modelling of the ISM in star forming galaxies limitations,

predictions and tests


10:45   Coffee/Tea

11:15   E. Berkhuijsen: Filling factors and scale-heights of the DIG in the Milky Way

            M. de Avillez: Volume filling factors in the ISM - the role of the disk-halo-disk cycle

            F. Heitsch: The field-density relation in the diffuse ISM

M. Haverkorn: Depolarization canals as diagnostics of the magneto-ionized medium

W. Reich: Faraday screens and canals

R. Beck: Methods to determine field strengths and their problems, and some results on magnetic energy densities in galaxies

12:45   Lunch

15:00   T. Landecker: Recent results from the CGPS

            D. Schnitzeler: Information on magnetic fields from the single-frequency WENNS survey

            R. Kothes: A very large stellar wind bubble revealed by its Faraday rotation

            M. Brentjens: RM-synthesis: background

16:10   Coffee/Tea

16:40   Plenary discussion on the turbulent ISM and the properties of the small-

scale field

            Possible questions:

·         What are the predictions for the interaction between ‘dynamo’s’  and ISM-physics?

·         How can we best observe the results of the interaction between dynamo's and ISM-physics?

·         How do the energy input into the turbulent ISM, and the decay and build-up of the field compare?

·         How ubiquitious is turbulence in the warm ISM and what are its characteristics and typical scales?

·         Is energy balance between the field and any of the other ISM components predicted, and what do the observations tell us?

·         How well is the field coupled to the plasma?

·         How do we best determine the properties of the small-scale field (Faraday tomography, ‘canals’, etc.?)


18:30   Workshop Dinner at Einstein, downtown Leiden (free of charge)


Thursday, July 8

09:15   W. Reich: The impact of absolute calibration

            R. Beck: SKA and the magnetic universe

            G. de Bruyn: LOFAR and the magnetic universe

10:30   Coffee/Tea

11:00   Plenary discussion on future of models and observations

            Key Experiments

            Possible questions:

·         What new instruments and techniques will and/or should become available?

·         How can/must models be improved?

·         What are the crucial experiments to test the models?


12:45   Lunch

14:45   Wrapping up

15:45   End