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Long-term stellar activity variations and their effect on radial-velocity measurements
(Oxford Univ Press, England, 2021)
Long-term stellar activity variations can affect the detectability of long-period and Earth-analogue extrasolar planets. We have,
for 54 stars, analysed the long-term trend of five activity indicators: logR
HK, the ...
Magnetic Activity Cycles in the Exoplanet Host Star ǫ Eridani
(IOP Publishing, 2013-02-01)
The active K2 dwarf ǫ Eri has been extensively characterized, both as a young solar analog and more recently as an exoplanet host star. As one of the nearest and brightest stars in the sky, it provides an unparalleled ...
Possible Chromospheric Activity Cycles in AD Leo
(IOP Publishing, 2014-01)
AD Leo (GJ 388) is an active dM3 flare star that has been extensively observed both in the quiescent and flaring states. Since this active star is near the fully convective boundary, studying its long-term chromospheric ...
Análise de campo magnético e de atividade cromosférica em estrelas subgigantes observadas por espectropolarimetria
(Universidade Federal do Rio Grande do NorteBrasilUFRNFísica Bacharelado, 2019)
Hα Moreton waves observed on December 06, 2006: A 2D case study
(Edp Sciences S A, 2013-04)
Context. We present high temporal resolution observations of a Moreton wave event detected with the Hα Solar Telescope for
Argentina (HASTA) in the Hα line 656.3 nm, on December 6, 2006.
Aims. The aim is to contribute ...
Halpha Moreton waves observed on December 06, 2006. A 2D case study
(EDP Sciences, 2013-04)
We present high temporal resolution observations of a Moreton wave event detected with the Hα Solar Telescope for Argentina (HASTA) in the Hα line 656.3 nm, on December 6, 2006. The aim is to contribute to the discussion ...
A Burst with Double Radio Spectrum Observed up to 212 GHz
(Springer, 2013-06)
We study a solar flare that occurred on 10 September 2002, in active region NOAA 10105, starting around 14:52 UT and lasting approximately 5 minutes in the radio range. The event was classified as M2.9 in X-rays and 1N in ...
A Burst with Double Radio Spectrum Observed up to 212 GHz
(SpringerDordrechtHolanda, 2013)