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Johannes Sahlmann (ESAC)
Wednesday 23 July 2014, 16:30-17:30
Astrometric planet search around the faintest and the brightest stars
- đ¤ Speaker: Johannes Sahlmann (ESAC)
- đ Date & Time: Wednesday 23 July 2014, 16:30 - 17:30
- đ Venue: Martin Ryle Seminar Room, Kavli Institute
Abstract
Measuring the positions of nearby stars can inform us on the presence and properties of extrasolar planets around them, because planets induce an orbital reflex motion of the host star. I will first show results from an ongoing astrometric planet search around very low-mass stars using an 8-metre optical telescope. For these faint targets, we achieve 0.1 milli-arcsecond precision, which allows us to measure accurate distances, to characterise elusive binaries, and to identify promising planet candidates. Second, I will discuss the potential for astrometric planet detection with ESA ’s Gaia mission and I will present a project that aims at exploiting this potential for the brightest stars in the sky.
Series This talk is part of the Exoplanet Seminars series.
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- Cosmology, Astrophysics and General Relativity
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- Martin Ryle Seminar Room, Kavli Institute
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