Poster
G. Catanzaro, V. Ripepi, S. Bernabei, M. Marconi, L. A. Balona, D. W. Kurtz, B. Smalley, H. Bruntt, R. Szabó, A. Grigahcène, M. J. P. F. G. Monteiro, J.-C. Suárez, K. Uytterhoeven
Abstract
We report spectroscopic observations for 19 δ Sct candidates observed by the Kepler satellite both in long and short cadence mode. For all these stars, by using spectral synthesis, we derive the effective temperature, the surface gravity and the projected rotational velocity. An equivalent spectral type classification has been also performed for all stars in the sample. These determinations are fundamental for modeling the frequency spectra that will be extracted from the Kepler data for asteroseismic inference. For all the 19 stars, we present also periodograms obtained from Kepler data. We find that all stars show peaks in both low- (γ Dor; g mode) and high-frequency (δ Sct; p mode) regions. Using the amplitudes and considering 5 d-1 as boundary frequency, we classified 3 stars as pure γ Dor, 4 as γ Dor-δ Sct hybrid, 5 as δSct-γDor hybrid, and 6 as pure δSct. The only exception is the star KIC05296877 which we suggest could be a binary.
Third Kepler Asteroseismology Workshop: 'Kepler Asteroseismology in Action'
Aarhus, Denmark
2010 June
