|
|
|
Visitors' Seminar: OGLE
Visitors' Seminar
Date: |
June 26th 2007 |
Venue: |
New 2nd floor meeting room |
Speaker: Lukasz Wyrzykowski
|
University of Cambridge
|
Title:
|
Microlensing, Variable Stars and other projects with the OGLE Project
|
Abstract:
I present several projects I have been involved in within the Optical
Gravitational Lensing Experiment (OGLE) which is long term photometry
monitoring survey using dedicated 1.3m telescope in the Las Campanas
Observatory in Chile.
Detection of microlensing events is one of main purposes of the OGLE.
Currently it detects several hundreds events every year in real-time,
including non-standard events. These, co called 'exotic' events, e.g.
binary lens or variable baseline events, require special modeling
effort, but can provide additional information about the event,
including the mass of the lensing object. Statistical studies of
microlensing events provide also hints on Galaxy halo Dark Matter contents.
As a by-product of long term monitoring survey hundreds of thousands of
variable stars were detected, classified and studied, including Cepheids
and eclipsing binaries.
OGLE is successful in finding extra-solar planets using two different
photometric methods: detecting planetary deviations to microlensing events
and searching for planetary transits. Up to date 9 planets were detected
with these methods.
The project is still on-going and the upgrade of the camera is already
taking place, so further planets are expected to be found in near
future.
|
