Reminder: Today, PHYSICS COLLOQUIUM
Speaker: E. Lorenz, Max Planck Institute, Munich
Title: Physics Perspectives in the new Window for
Gamma-Ray Astronomy between 20 and 350 GeV
Date / Time: Wednesday, January 29, 2003, 16:45 h
(tea starts at 16:15 h)
Place / Room: HPH G4
Abstract:
In 2003 a number of large diameter Air Cherenkov telescopes
(CANGAROO, H.E.S.S., MAGIC, VERITAS) for very high energy
gamma-ray astronomy will start to take data. These high sensitivity
telescopes were designed for observations in the up to now
inaccesseable energy range between 20-350 GeV where fundamental
changes in gamma-ray emission from distant cosmic objects must
occur. Prospects for observations and some of the astrophysics
implications will be discussed.
With best regards,
C. Aurelio
--
-------------------------------
Secretary's office
Mrs. Cornelia Aurelio
Institute of Particle Physics
HPK G24
ETH Honggerberg
CH-8093 Zurich
Switzerland
Tel: +41 1 633 20 41
Fax: +41 1 633 10 67
http://www.ipp.phys.ethz.ch
Reminder: Today, PHYSICS COLLOQUIUM
Speaker: E. van Dishoeck, Leiden
Title: From Molecules to Planets
Date / Time: Wednesday, January 22, 2003, 16:45 h
(tea starts at 16:15 h)
Place / Room: HPH G4
Abstract:
Stars and planetary systems are born deep inside molecular clouds of
gas and dust. The detection of nearly 100 exo-solar planets around
nearby stars
shows that the formation of gas-rich giant planets is common. But
how do these planets form? Although it is commonly accepted that they
originate in
the circumstellar disks around young stars, little is known about
the physical and chemical processes in such regions. Only long
wavelength
observations are able to probe deep inside these stellar and
planetary nurseries. In this talk, an overview will be given of
recent developments in the
area of star- and planet formation, with emphasis on the wealth of
spectroscopic results. The evolution of the gas and dust from
molecular clouds to
protostars and forming planetary systems will be traced using recent
examples from submillimeter and mid-infrared telescopes. The need for
future
high sensitivity, high angular resolution observations such as will
be provided by the Atacama Large Millimeter Array and the James Webb
Space
telescope will be emphasized.
With best regards,
C. Aurelio
--
-------------------------------
Secretary's office
Mrs. Cornelia Aurelio
Institute of Particle Physics
HPK G24
ETH Honggerberg
CH-8093 Zurich
Switzerland
Tel: +41 1 633 20 41
Fax: +41 1 633 10 67
http://www.ipp.phys.ethz.ch
Reminder: Today, PHYSICS COLLOQUIUM
Speaker: J. Binney, Oxford
Title: Heating Cooling Flows
Date / Time: Wednesday, January 15, 2003, 16:45 h
(tea starts at 16:15 h)
Place / Room: HPH G4
Abstract:
The potential wells of massive galaxy clusters and elliptical
galaxies are filled with X-ray emitting gas. In the majority of
cases the cooling time at the centre is significantly less than the
Hubble time. This phenomenon is clearly key for
understanding galaxy formation. In the last two years data from
XMM-Newton and Chandra have at last undermined
confidence in the steady-state cooling-flow model that for two
decades was the standard paradigm. The observational and
theoretical case against the steady-state model will be presented
and our current understanding of cooling flows as dynamical
phenomena driven by AGN will be outlined.
With best regards,
C. Aurelio
--
-------------------------------
Secretary's office
Mrs. Cornelia Aurelio
Institute of Particle Physics
HPK G24
ETH Honggerberg
CH-8093 Zurich
Switzerland
Tel: +41 1 633 20 41
Fax: +41 1 633 10 67
http://www.ipp.phys.ethz.ch