14 citations · 17 across the 3 of their papers we have counts for
8 papers
Fractal signature as a rotational modulation and stellar noise classifier based on the active Kepler stars
Paulo Cleber Farias da Silva Filho, Jose Ribamar Dantas Silveira Junior, Bricio Warney de Freitas Alves +5
In this study, we report on the analysis of 701 stars in a solar vicinity defined in three categories namely subsolar, solar, and supersolar with rotation periods between 1 and 70…
Stellar age dependence of the nonextensive magnetic braking index: a test for the open cluster Per
Daniel B. de Freitas
Using a generalized function of the stellar spin-down law, we investigate the age dependence of the magnetic braking index (). Our survey includes 9 open clusters aged lower tha…
On the multiscale behaviour of stellar activity and rotation of the planet host Kepler-30
D. B. de Freitas, A. F. Lanza, F. O. da Silva Gomes +1
Kepler-30 is a unique target to study stellar activity and rotation in a young solar-like star accompanied by a compact planetary system. We use about 4 years of high-precision pho…
Non-extensive processes associated with heating of the Galactic disc
C. A. P. Viana, D. B. de Freitas
We analyse the mechanisms ruling galactic disc heating through the dynamics of space velocities , and , extracted from the Geneva-Copenhagen catalogue. To do this, we use…
Multifractal signatures of gravitational waves detected by LIGO
Daniel B. de Freitas, Mackson M. F. Nepomuceno, J. R. De Medeiros
We analyze the data from the 6 gravitational waves signals detected by LIGO through the lens of multifractal formalism using the MFDMA method, as well as shuffled and surrogate pro…
New Suns in the Cosmos V: Stellar rotation and multifractality in active \textit{Kepler} stars
D. B. de Freitas, M. M. F. Nepomuceno, L. D. Alves Rios +2
In the present study, high-precision time series photometry for the active \emph{Kepler} stars is described in the language of multifractals. We explore the potential of using the…