[FPSPACE] Theoretical planetary mass spectra - a predition for COROT
ljk4 at msn.com
Tue Feb 6 12:52:00 EST 2007
From: Christopher Broeg [view email]
Date: Mon, 5 Feb 2007 18:29:31 GMT (1410kb)
Theoretical planetary mass spectra - a predition for COROT
Authors: C. Broeg
Comments: 6 pages, 3 figures, MNRAS letter, accepted 2007 February 1
The satellite COROT will search for close-in exo-planets around a few
thousand stars using the transit search method. The COROT mission holds the
promise of detecting numerous exo-planets. Together with radial velocity
follow-up observations, the masses of the detected planets will be known.
We have devised a method for predicting the expected planetary populations
and compared it to the already known exo-planets. Our method works by
looking at all hydrostatic envelope solutions of giant gas planets that
could possibly exist in arbitrary planetary nebulae and comparing the
relative abundance of different masses. We have completed the first such
survey of hydrostatic equilibria in an orbital range covering periods of 1
to 50 days.
Statistical analysis of the calculated envelopes suggests division into
three classes of giant planets that are distinguished by orbital separation.
We term them classes G (close-in), H, and J (large separation). Each class
has distinct properties such as a typical mass range.
Furthermore, the division between class H and J appears to mark important
changes in the formation: For close-in planets (classes G and H) the concept
of a critical core-mass is meaningless while it is important for class J.
This result needs confirmation by future dynamical analysis.
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