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TraMoS project – III. Improved physical parameters, timing analysis and starspot modelling of theWASP-4b exoplanet system from 38 transit observations
(Oxford University Press on behalf of the Royal Astronomical Society, 2013)
We report 12 new transit observations of the exoplanetWASP-4b from the Transit Monitoring
in the South (TraMoS) project. These transits are combined with all previously published transit
data for this planet to provide ...
The CoRoT-7 planetary system: two orbiting super-Earths
(EDP SCIENCES S A, 2009)
We report on an intensive observational campaign carried out with HARPS at the 3.6 m telescope at La Silla on the star CoRoT-7. Additional simultaneous photometric measurements carried out with the Euler Swiss telescope ...
Análise wavelet e modelo de manchas em curvas de luz estelares dos telescópios espaciais Kepler e CoRoT
(Universidade Federal do Rio Grande do NorteBrasilUFRNPROGRAMA DE PÓS-GRADUAÇÃO EM FÍSICA, 2014-12-22)
Analogous to sunspots and solar photospheric faculae, which visibility is modulated by
stellar rotation, stellar active regions consist of cool spots and bright faculae caused by the magnetic
field of the star. Such ...
Rotação diferencial em estrelas do tipo solar
(Universidade Federal do Rio Grande do NorteBRUFRNPrograma de Pós-Graduação em FísicaFísica da Matéria Condensada; Astrofísica e Cosmologia; Física da Ionosfera, 2014-04-07)
Stellar differential rotation is an important key to understand hydromagnetic
stellar dynamos, instabilities, and transport processes in stellar interiors as well as for
a better treatment of tides in close binary and ...
Identification of a deep contact binary in the field of the globular cluster 47 Tuc
(Elsevier Science, 2014-01)
Three light curves of the eclipsing binary V95–47 Tuc were obtained in serval nights from December, 2010 to November, 2011. By analyzing the light curves with the 2010 version of the W-D code, the mass-ratio and the fill-out ...
Ground-based detection of G star super ares with NGTS
(Oxford University Press, 2018-07)
We present high cadence detections of two superflares from a bright G8 star (V = 11.56) with the Next Generation Transit Survey (NGTS). We improve upon previous superflare detections by resolving the flare rise and peak, ...
Rotação e atividade de estrelas F, G e K observadas pelos satélites CoRoT e Kepler
(BrasilUFRNPROGRAMA DE PÓS-GRADUAÇÃO EM FÍSICA, 2017-12-01)
The question of how singular the Sun appears to be when compared to a class of solar-like
stars in terms of their activity and rotation has been the subject of intense research over
the last three decades. Recently, CoRoT ...
Sobre a variabilidade fotométrica em estrelas anãs brancas
(Universidade Federal do Rio Grande do NorteBrasilUFRNPROGRAMA DE PÓS-GRADUAÇÃO EM FÍSICA, 2019-12-17)
Photometric variability can provide important information about white dwarfs, whether related
to rotation or the presence of companions - planetary, substellar or stellar-remnant. The high
photometric precision and the ...
Precision radial velocities of 15 M5–M9 dwarfs
(Royal Astronomical Society, 2014-02-20)
We present radial velocity measurements of a sample of M5V–M9V stars from our Red-Optical
Planet Survey, operating at 0.652–1.025 µm. Radial velocities for 15 stars, with rms precision
down to 2.5 m s−1 over a week-long ...