Paper: astro-ph/0510416
Date: Fri, 14 Oct 2005 05:53:04 GMT (87kb)

Title: Observing solar-like oscillations: recent results

Authors: Timothy R. Bedding and Hans Kjeldsen

Comments: 6 pages, Invited review talk at the meeting on Stellar Pulsation and
Evolution, June 2005, Rome. Proceedings to appear in "Memorie della Societa'
Astronomica Italiana", Vol. 76/4, eds. A.R. Walker & G. Bono
\\
We review recent progress in observations of ground-based oscillations.
Excellent observations now exist for a few stars (alpha Cen A and B, mu Ara),
while there is some controversy over others (Procyon, eta Boo). We have reached
the stage where single-site observations are of limited value and where careful
planning is needed to ensure the future of asteroseismology.

\\ ( http://arXiv.org/abs/astro-ph/0510416 , 87kb)

Paper: astro-ph/0510415
Date: Thu, 13 Oct 2005 23:35:20 GMT (655kb)

Title: A proposed origin for chondrule-forming shocks in the solar nebula

Authors: Andrew F. Nelson (1,2,3), Maximilian Ruffert (1) ((1) U of Edinburgh,
(2) Louisiana State University, Dept of Physics, (3) LANL T6/X2)

Comments: This submission appears in the conference proceedings for "Chondrites
and the Protoplanetary Disk", ASP v341, p903
\\
We propose that the nebular shocks currently favored as a model to form
chondrules and other annealed silicates in the solar nebula originate in the
dynamical activity present in the envelope of forming Jovian planets. In
contrast to the classic `core accretion model', our 3D hydrodynamic simulations
show that this envelope is not a 1D hydrostatic structure but is instead
vigorously active and contains densities and temperatures that appear similar
in magnitude and spatial extent to those thought to be responsible for the
production of chondrules.

\\ ( http://arXiv.org/abs/astro-ph/0510415 , 655kb)