Extrasolar Terrestrial Planets: Can We Detect Them Already?

Details Extrasolar Terrestrial Planets: Can We Detect Them Already? Extrasolar Terrestrial Planets: Can We Detect Them Already?

2002-08-26

arxiv.org/abs/astro-ph/0208462v1

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures, to appear in Conference Proceedings "Scientific Frontiers in Research on Extrasolar Planets", Drake Deming

Scientific paper

With the example of Proxima Centauri we discuss the feasibility of detecting terrestrial planets (1 to a few M_Earth) using the high precision radial velocity (RV) technique. If a very high RV precision for M stars is achieved even planets with these extremely low masses become detectable. For Proxima Cen (M5V), one of the prime targets of our M-stars planet search program using the UVES spectrograph & iodine cell at the ESO VLT UT2, we obtain a long term RV precision of 2.5 m/s. Based on numerical simulations we determine that this level of precision would have already allowed us to detect planets with m sin i = 4 to 6 M_Earth inside the habitable zone of Proxima Cen.

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