2109 20160701171658.0 10.1088/0067-0049/218/2/27 DOI ASTROimport-266 Van Reeth, T. 2015 Gravity-mode Period Spacings as a Seismic Diagnostic for a Sample of γ Doradus Stars from Kepler Space Photometry and High-resolution Ground-based Spectroscopy Gamma Doradus stars (hereafter γ Dor stars) are gravity-mode pulsators of spectral type A or F. Such modes probe the deep stellar interior, offering a detailed fingerprint of their structure. Four-year high-precision space-based Kepler photometry of γ Dor stars has become available, allowing us to study these stars with unprecedented detail. We selected, analyzed, and characterized a sample of 67 γ Dor stars for which we have Kepler observations available. For all the targets in the sample we assembled high-resolution spectroscopy to confirm their F-type nature. We found fourteen binaries, among which are four single-lined binaries, five double-lined binaries, two triple systems, and three binaries with no detected radial velocity variations. We estimated the orbital parameters whenever possible. For the single stars and the single-lined binaries, fundamental parameter values were determined from spectroscopy. We searched for period spacing patterns in the photometric data and identified this diagnostic for 50 of the stars in the sample, 46 of which are single stars or single-lined binaries. We found a strong correlation between the spectroscopic v{sin}i and the period spacing values, confirming the influence of rotation on γ Dor-type pulsations as predicted by theory. We also found relations between the dominant g-mode frequency, the longest pulsation period detected in series of prograde modes, v{sin}i, and {log} {T}{eff}. Tkachenko, A. Aerts, C. Pápics, P. I. Triana, S. A. Zwintz, K. Degroote, P. Debosscher, J. Bloemen, S. Schmid, V. S. De Smedt, K. Fremat, Y. Fuentes, A. S. Homan, W. Hrudkova, M. Karjalainen, R. Lombaert, R. Nemeth, P. Østensen, R. Van De Steene, G. Vos, J. Raskin, G. Van Winckel, H. The Astrophysical Journal Supplement Series 218 2 2015 27 http://esoads.eso.org/abs/2015ApJS..218...27V published in REFERD