238 citations · 879 across the 16 of their papers we have counts for
16 papers
Asteroseismic detection of a predominantly toroidal magnetic field in the deep interior of the main-sequence F star KIC 9244992
Masao Takata, Simon J. Murphy, Donald W. Kurtz +2
An asteroseismic analysis has revealed a magnetic field in the deep interior of a slowly-rotating main-sequence F star KIC9244992, which was observed by the Kepler spacecraft for f…
Detecting active latitudes of Sun-like stars using asteroseismic a-coefficients
Othman Benomar, Masao Takata, Michael Bazot +3
We introduce a framework to measure the asphericity of Sun-like stars using , and coefficients, and constrain their latitudes of magnetic activity. Systematic erro…
Asteroseismology of the dip structure in period-spacings of rapidly rotating gamma Doradus stars caused by the coupling between core and envelope oscillations
Takato Tokuno, Masao Takata
Recent asteroseismic observations by the space mission have revealed the dip fine structure in the period-spacing versus period diagram of rapidly rotating Doradus…
Multi-cavity gravito-acoustic modes in stars: A general analytical resonance condition
C. Pinçon, M. Takata
Asteroseismology has proven to be a powerful method for probing stellar interiors. Analytical descriptions of the global oscillation modes, in combination with pulsation codes, hav…
Bayesian rotation inversion of KIC 11145123
Yoshiki Hatta, Takashi Sekii, Othman Benomar +1
A scheme of Bayesian rotation inversion, which allows us to compute the probability of a model of a stellar rotational profile, is developed. The validation of the scheme with simp…
The two-dimensional internal rotation of KIC11145123
Yoshiki Hatta, Takashi Sekii, Masao Takata +1
The two-dimensional internal rotation of KIC11145123 has been inferred via asteroseismology. Based on the Optimally Localized Averaging method and a simple three-zone modeling of t…
Non-standard modeling of a possible blue straggler star, KIC 11145123
Yoshiki Hatta, Takashi Sekii, Masao Takata +1
Non-standard modeling of KIC 11145123, a possible blue straggler star, has been asteroseismically carried out based on a scheme to compute stellar models with the chemical composit…
Rotation of the convective core in Dor stars measured by dips in period spacings of g modes coupled with inertial modes
Hideyuki Saio, Masao Takata, Umin Lee +2
The relation of period spacing () versus period () of dipole prograde g modes is known to be useful to measure rotation rates in the g-mode cavity of rapidly rotating Do…
On the first Sct--roAp hybrid pulsator and the stability of p and g modes in chemically peculiar A/F stars
Simon J. Murphy, Hideyuki Saio, Masahide Takada-Hidai +4
Strong magnetic fields in chemically peculiar A-type (Ap) stars typically suppress low-overtone pressure modes (p modes) but allow high-overtone p modes to be driven. KIC 11296437…
Star Formation Timescales of the Halo Populations from Asteroseismology and Chemical Abundances
Tadafumi Matsuno, Wako Aoki, Luca Casagrande +9
We combine asteroseismology, optical high-resolution spectroscopy, and kinematic analysis for 26 halo red giant branch stars in the \textit{Kepler} field in the range of $-2.5<[\ma…
Asteroseismic detection of latitudinal differential rotation in 13 Sun-like stars
O. Benomar, M. Bazot, M. B. Nielsen +7
The differentially rotating outer layers of stars are thought to play a role in driving their magnetic activity, but the underlying mechanisms that generate and sustain differentia…
Spectroscopic and asteroseismic analysis of the remarkable main-sequence A star KIC 11145123
Masahide Takada-Hidai, Donald W. Kurtz, Hiromoto Shibahashi +4
A spectroscopic analysis was carried out to clarify the properties of KIC 11145123 -- the first main-sequence star with a determination of core-to-surface rotation -- based on spec…
Shape of a slowly rotating star measured by asteroseismology
Laurent Gizon, Takashi Sekii, Masao Takata +6
Stars are not perfectly spherically symmetric. They are deformed by rotation and magnetic fields. Until now, the study of stellar shapes has only been possible with optical interfe…
Nearly-uniform internal rotation of solar-like main-sequence stars revealed by space-based asteroseismology and spectroscopic measurements
O. Benomar, M. Takata, H. Shibahashi +2
The rotation rates in the deep interior and at the surface of 22 main-sequence stars with masses between and are constrained by combining asteroseismol…
Asteroseismic measurement of slow, nearly-uniform surface-to-core rotation in the main sequence F star KIC 9244992
Hideyuki Saio, Donald W. Kurtz, Masao Takata +4
We have found a rotationally split series of core g-mode triplets and surface p-mode multiplets in a main sequence F star, KIC 9244992. Comparison with models shows that the star h…
Asteroseismic measurement of surface-to-core rotation in a main sequence A star, KIC 11145123
Donald W. Kurtz, Hideyuki Saio, Masao Takata +3
We have discovered rotationally split core g-mode triplets and surface p-mode triplets and quintuplets in a terminal age main sequence A star, KIC 11145123, that shows both Sct…