astro-ph coffee suggested papers for Tue, Nov 05, 2013 at 10:30:00 AM
astro-ph coffee will be held at the date and time above. Some suggested papers of interest are listed below.
We analyze high quality abundances data of solar neighborhood stars and show
that there are two distinct regimes of [alpha/Fe] versus age which we identify
as the epochs of the thick and thin disk formation. A tight correlation between
metallicity and [alpha/Fe] versus age is clearly identifiable on thick disk
stars, implying that this population formed from a well mixed ISM, over a time
scale of 4-5 Gyr. Thick disk stars vertical velocity dispersion correlate with
age, with the youngest object...
We present a large sample of stellar rotation periods for Kepler Objects of
Interest (KOIs), based on three years of public Kepler data. These were
measured by detecting periodic photometric modulation caused by star spots,
using an algorithm based on the autocorrelation function (ACF) of the light
curve, developed recently by McQuillan, Aigrain & Mazeh (2013). Of the 1919
main-sequence exoplanet hosts analyzed, robust rotation periods were detected
for 737. Comparing the detected stellar perio...
Stars hosting hot Jupiters are often observed to have high obliquities,
whereas stars with multiple co-planar planets have been seen to have low
obliquities. This has been interpreted as evidence that hot-Jupiter formation
is linked to dynamical disruption, as opposed to planet migration through a
protoplanetary disk. We used asteroseismology to measure a large obliquity for
Kepler-56, a red giant star hosting two transiting co-planar planets. These
observations show that spin-orbit misalignmen...
astroph.py v0.98.9 based on the
Updated 2013/11/05 09:26:38