Image of Alice in Wonderland at the Mad Hatter's tea party You are cordially invited to afternoon tea and biscuits wine and chocolate

Astronomy Tea Talks at Caltech

Mondays, Robinson 106
Tea:  4.00pm
Talk: 4.15pm

Organised by:

2007 - 2008 season:
25 February 2008 Jorg-Uwe Pott (WMKO/UCLA)

"New science with Large-Aperture Infrared Interferometry: First fringes on Galactic center stars and the near future of the Keck Interferometer"


The current results of our ongoing Galactic center (GC) observations
with optical long baseline interferometry (OLBI) at infrared
wavelengths (2 & 10 um) will be presented. Fringe detections with the
VLTI on the brightest GC stars have revealed indications of unusual
MIR-dust properties in the inner 0.2 parsec, probably due to the
extreme properties of the environments of the massive black hole at
the very center. Phase-referencing in the NIR now appears to be
feasible even in the GC for modern dual-field interferometers and
will increase the limiting sensitivity of existing arrays by several
magnitudes.
An outlook to the many opportunities in the field of GC research due
to the actual instrument upgrade of the Keck Interferometer (ASTRA)
will be given, as well as a glimpse to the future of extra-galactic
NIR interferometry.
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Last modified on 20th Jul 2011 by Johan Richard.  

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