NASA's Origins of Solar Systems Program Astronomers discover...
The findings offer the best evidence yet that planets can sprout up in dense stellar environments.
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“Geologist [I'm Climate Change]”
Since: Mar 07
#1 Sep 17, 2012
Nice: I like that one.
The location in a relatively large cluster alters the tidal radius of scatteing for planets in a distant orbit only. For stars of solar mass the tidal scattering radius may be at the orbit distance of Uranus or Neptune.
Hot jupiter type planets appear typical for metal rich stars so this is not such a surprise. they also are orbiting well inside the tidal scattering radius, and random encounters would probably not drive the planets into the central star; (would require a more distant planet orbiting in plane to do this).
The important bit would be a survey to reveal more distant orbiting examples. such as analogues of the 55Cnc system.
Also note: the Hyades is a few million years older and is just as metal rich. It is also even closer. This would be an excellent target for a followup study. Particlularly as a result of the fact that 55cnc appears to be a hyades star.
Have a nice day: Ag
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