Localizing Evidence of Gravitational waves by Observations of Light source Astrometric Signature: LEGOLAS
Abstract
Our understanding of Fundamental Physics benefits of modern techniques for high precision angular measurement. Among the crucial tests of General Relativity and competing theories is the detection of gravitational waves, which is the goal of advanced experiments (LISA, VIRGO, LIGO). Our investigation is focused on a novel concept based on observation of selected astro-nomical objects in our Galaxy, in particular close binary systems of high density components, e.g. neutron stars and white dwarves, expected to be sources of gravitational waves in the Low Frequency range, between 10-4 Hz and 10-1 Hz. The photons emitted by the bright companion during its orbit cross the strong gravitational field of the massive object with variable geometry, thus resenting a variable deflection, experienced by a remote observer as an apparent position variation. The proposed detection mechanism is based on astrometric observations by a dedicated space telescope, monitoring a selected sample of candidates, with microarcsec level precision on short term relative measurements. We discuss the characteristics and availability of potential candidates, the mission implemen-tation concept and its high level specifications.
- Publication:
-
38th COSPAR Scientific Assembly
- Pub Date:
- 2010
- Bibcode:
- 2010cosp...38.3826B