Exoplanets from the radial velocities of nearby stars----中国科学院紫金山天文台

Seminar Title	Exoplanets from the radial velocities of nearby stars

Speaker:	Prof. Hugh Jones

Affiliation:	(University of Hertfordshire)

When	Wednesday morning, Nov. 6, 10:00 a.m.

Where:	Hall 212, Astronomy Building
	Welcome to Attend

	( PMO Academic Committee & Academic Circulating committee)

Abstract: For most of human history extrasolar planets had a lot in common with dragons. Many people believed in them, but there were no confirmed cases. In 1995 some people's view of both changed with potential discoveries such as 51 Peg b and Nine Dragon Pillar. In 2000 with the discovery of the transit event in the star HD209458, exoplanets became widely accepted and have since been discovered in large numbers. Though still we are only barely sensitive to Solar System's like our own. Our knowledge about the exoplanets around the dominant population of stars, the low-mass stars or M dwarfs is even more cursory. Hence the discovery of terrestrial-like exoplanets around Proxima, Trappist-1 and Barnard's star is providing interesting insights into their prevalence and diversity. This talk will be focussed on efforts to constrain Solar System analogues around cool stars and Solar type stars despite their faintness and sustained activity and will emphasise (i) the combination of data from different experiments, (ii) the wavelength sensitivity of signals and (iii) new instrumentation.
Brief Biography:

Professor Hugh Jones began his research career as a PhD student based at the Royal Observatory of Edinburgh and partly at Space Telescope Science Institute in Baltimore. He was a European Commission research fellow in Tokyo then moved to Liverpool and since 2004 at the University of Hertfordshire. He has had close involvement in the discovery and characterisation of a significant fraction of the nearby brown dwarfs and extrasolar planets including the discovery of planet's orbiting the Sun's nearest neighbours, Proxima Centauri and Barnard's star.