Bibcode
Bradley, P. A.; Guzik, J. A.; Miles, L. F.; Uytterhoeven, K.; Jackiewicz, J.; Kinemuchi, K.
Referencia bibliográfica
The Astronomical Journal, Volume 149, Issue 2, article id. 68, 13 pp. (2015).
Fecha de publicación:
2
2015
Número de citas
74
Número de citas referidas
68
Descripción
The light curves of 2768 stars with effective temperatures and surface
gravities placing them near the gamma Doradus (γ Dor)/delta Scuti
(δ Sct) instability region were observed as part of the Kepler
Guest Observer program from Cycles 1 through 5. The light curves were
analyzed in a uniform manner to search for γ Dor, δ Sct, and
hybrid star pulsations. The γ Dor, δ Sct, and hybrid star
pulsations extend asteroseismology to stars slightly more massive
(1.4–2.5 M⊙) than our Sun. We find 207 γ Dor,
84 δ Sct, and 32 hybrid candidate stars. Many of these stars are
cooler than the red edge of the γ Dor instability strip as
determined from ground-based observations made before Kepler. A few of
our γ Dor candidate stars lie on the hot side of the ground-based
γ Dor instability strip. The hybrid candidate stars cover the
entire region between 6200 K and the blue edge of the ground-based
δ Sct instability strip. None of our candidate stars are hotter
than the hot edge of the ground-based δ Sct instability strip. Our
discoveries, coupled with the work of others, show that Kepler has
discovered over 2000 γ Dor, δ Sct, and hybrid star
candidates in the 116 square degree Kepler field of view. We found
relatively few variable stars fainter than magnitude 15, which may be
because they are far enough away to lie between spiral arms in our
Galaxy, where there would be fewer stars.