The SAGA so far: reading the history of the Galaxy with asteroseismology

¹ Research School of Astronomy & Astrophysics, The Australian National University, ACT, Australia
² Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Denmark
³ Institute of Space Sciences, Campus UAB, Fac. Ciéncies, E-08193 Bellaterra, Spain
⁴ Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006, Australia
⁵ Lund Observatory, Department of Astronomy and Theoretical Physics, SE-22100 Lund, Sweden

^a e-mail: luca.casagrande@anu.edu.au
^b † Stromlo Fellow
^c http://www.mso.anu.edu.au/saga

Published online: 23 September 2015

Abstract

Asteroseismology has the capability of delivering stellar properties which would otherwise be inaccessible, such as radii, masses and thus ages of stars. When this information is coupled with classical determinations of stellar parameters, such as metallicities, effective temperatures and angular diameters, powerful new diagnostics for stellar and Galactic studies can be obtained. The ongoing Strömgren survey for Asteroseismology and Galactic Archaeology (SAGA) is pursuing such a goal, by determining photometric stellar parameters for stars with seismic oscillations measured by the Kepler satellite. As the survey continues and expands in sample size, SAGA will provide an unprecedented opportunity to constrain theories of the evolution of the Milky Way disc.