FM17p.04 — The Stellar Observations Network Group - first results

Date & Time

Aug 10th at 6:00 PM until 6:00 PM




Rating ( votes)

Author(s): Victoria Antoci1, Frank Grundahl1, Joergen Christensen-Dalsgaard1, Hans Kjeldsen1

Institution(s): 1. Stellar Astrophysics Centre, Aarhus University

SONG - the Stellar Observations Network Group is a Danish-led project set to design and build a global network of 1-m telescopes to carry out detailed studies of solar-like stars using asteroseismology and to discover and characterise exo-planets and their star system. Here we present more than 100 nights of high-precision radial velocity measurements from 2014 of the subgiant mu Herculis. Preliminary analyses of the largest ground-based data set ever obtained for such as star clearly show the detection of stochastically excited pressure modes. The high quality of our data allows unique extraction of individual modes over many orders in the frequency spectrum, leading to studies of rotation, convection, near-surface effects, core structure using mixed modes and stellar activity.