Searching for habitable exoplanets by using combined microlensing and radial velocity facilities

Details Searching for habitable exoplanets by using combined microlensing and radial velocity facilities Searching for habitable exoplanets by using combined microlensing and radial velocity facilities

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008phst..130a4008g&link_type=abstract

Physica Scripta, Volume 130, Issue , pp. 014008 (2008).

Mathematics

Logic

5

Scientific paper

The habitable planetary regime, where life as we know it from the Earth in principle can exist, has long been among the technically most difficult to search for the existence of exoplanets. It spans the inner and outer orbital range, where liquid water in principle can exist on a planetary surface (the habitable zone), and the planetary mass range from the lowest mass where an atmosphere is bound over biological timescales to the upper mass limit where a nebula gas-collapse transforms a solid planet into a gas planet. With a prober equipment, microlensing is sensitive to this regime for most stellar types, including solar-type stars, while the radial velocity technique complements the detection regime by being sensitive to such planets around the lowest mass stars. By combining microlensing with radial velocity measurements, it is possible to cover the complete habitable region from the ground. I outline here the theory that in principle will make it possible to perform an efficient survey throughout the habitable regime of the most common types of stars in our galaxy over the next few years, and describe how it can be done in practise for a relatively low cost.

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