This artist's concept shows a dusty planet-forming disk in orbit around a whirling young star. Image credit: NASA/JPL-Caltech
This artist's concept shows a dusty planet-forming disk in orbit around a whirling young star. Image credit: NASA/JPL-Caltech
"Planemos" May Give Rise to Planets, Moons
Scientific American | June 06, 2006 | David Biello
Posted on 06/06/2006 2:08:11 AM EDT by SunkenCiv
http://www.freerepublic.com/focus/f-chat/1644108/posts
It is very hard to catch up with Astronomy these days. New things are coming out every day.
Are Debris Disks and Massive Planets Correlated? [abstract]Using data from the Spitzer Space Telescope Legacy Science Program "Formation and Evolution of Planetary Systems" (FEPS), we have searched for debris disks around 9 FGK stars (2-10 Gyr), known from radial velocity (RV) studies to have one or more massive planets. Only one of the sources, HD 38529, has excess emission above the stellar photosphere; at 70 micron the signal-to-noise ratio in the excess is 4.7 while at wavelengths < 30 micron there is no evidence of excess. The remaining sources show no excesses at any Spitzer wavelengths. Applying survival tests to the FEPS sample and the results for the FGK survey published in Bryden et al. (2006), we do not find a significant correlation between the frequency and properties of debris disks and the presence of close-in planets. We discuss possible reasons for the lack of a correlation.
Amaya Moro-Martin, John M. Carpenter, Michael R. Meyer,
Lynne A. Hillenbrand, Renu Malhotra, David Hollenbach,
Joan Najita, Thomas Henning, Jinyoung S. Kim,
Jeroen Bouwman, Murray D. Silverstone, Dean C. Hines,
Sebastian Wolf, Illaria Pascucci, Eric E. Mamajek,
Jonathan Lunine
