# Summary of K2 Program GO5075

Title: Testing asteroseismology with bright red giants using K2 timeseries and interferometry

PI: Boyajian, Tabetha Suzanne (Yale University)
CoIs: 

We propose to observe a small number of bright nearby red giant stars taken from the Hipparcos catalogue, for which we will obtain additional ground-based interferometric observations and high-resolution spectra to determine precise values of the angular diameter 0, T eff, log (g), and surface composition. These additional constraints, coupled with the oscillation spectrum derived from K2 observations and the available parallax information, will provide the most stringent tests possible of the asteroseismic techniques used to determine masses, radii and ages of stars, as well as the physical processes governing the evolution of red giants and the Galaxy.

# Targets requested by this program that have been observed (9)
EPIC ID, RA (J2000) [deg], Dec (J2000) [deg], magnitude, Investigation IDs
211514553, 136.242085, 13.343948, 7.198, GO5075_LC|GO5104_LC
211743326, 123.248871, 16.514319, 5.837, GO5057_LC|GO5075_LC|GO5104_LC
211811597, 134.191623, 17.48135, 7.48, GO5075_LC|GO5089_LC|GO5104_LC
211974750, 125.000428, 19.850969, 7.517, GO5075_LC|GO5104_LC
211976270, 130.458673, 19.874169, 6.719, GO5007_LC|GO5033_LC|GO5048_LC|GO5057_LC|GO5075_LC|GO5104_LC
211982221, 133.480559, 19.967133, 6.516, GO5075_LC|GO5089_LC|GO5104_LC|GO5023_LC|GO5064_LC
211984704, 130.026741, 20.007789, 6.196, GO5007_LC|GO5033_LC|GO5048_LC|GO5075_LC|GO5104_LC|GO5023_LC
211993818, 126.204921, 20.152995, 7.218, GO5045_LC|GO5057_LC|GO5075_LC|GO5089_LC|GO5104_LC|GO5023_LC
212091650, 134.271444, 21.860447, 6.81, GO5075_LC|GO5089_LC