13 publication(s) trouvée(s)
Article scientifique
Maia variables and other anomalies among pulsating stars
High-precision photometry from TESS has revealed over 500 stars, located between the δ Scuti and β Cephei instability strips, which …
Article scientifique
Diurnal and seasonal variations of the occurrence of ionospheric irregularities over Nigeria from GNSS data
We investigate the occurrence of ionospheric irregularities in Nigeria during 2014, using the Global Navigation Satellite System (GNSS) total electron …
Article scientifique
Structural influences on groundwater circulation in the Makgadikgadi salt pans of Botswana? Implications for martian playa environments
Across the surface of Mars, evidence of past lacustrine and evaporitic environments has been found within basins and craters, where …
Article scientifique
Response of the American equatorial ionization anomaly to 2016 Arctic sudden stratospheric warming events
Apart from the rapid ionospheric response to geomagnetic forcing originating from the Sun during extreme space weather events, forcing from …
Article scientifique
Relationship between geomagnetic storms and occurrence of ionospheric irregularities in the west sector of Africa during the peak of the 24th solar cycle
The study of ionospheric irregularities is important since many technological systems might be influenced by the ionosphere. In this work, …
Article scientifique
Irregularities in the African ionosphere associated with total electron content anomalies observed during high solar activity levels
In this paper, we investigate anomalies in total electron content (TEC) from 7 stations of the Africa Geodetic Reference Frame …
Article scientifique
QM/MM Study of the H2 Formation on the Surface of a Water Ice Grain Doped With Formaldehyde: Molecular Dynamics and Reaction Kinetics
Formaldehyde has been widely observed in the icy mantle of interstellar grains. H2CO may be formed from successive hydrogenations of …
Article scientifique
In Praise of Mistakes
Mistakes are a key driver of scientific progress. We should do all we can to eliminate them, partly to keep …
Article scientifique
Asteroseismic Observations of Hot Subdwarfs
There are a number of reasons for studying hot subdwarf pulsation; the most obvious being that these stars remain a …
Article scientifique
Spots and Flares in Hot Main Sequence Stars Observed by Kepler, K2, and TESS
About 22,000 Kepler stars, 7,000 K2 stars, and nearly 60,000 TESS stars from sectors 1–24 have been classified according to …
Article scientifique
The Hot Limit of Solar-like Oscillations From Kepler Photometry
Kepler short-cadence photometry of 2347 stars with effective temperatures in the range 6000 – 10000 K was used to search …
Article scientifique
Pulsation in Intermediate-Mass Stars
A new perspective of pulsation in stars within the δ Scuti instability strip has recently emerged as a result of …
Article scientifique
The AGN Nature of LINER Nuclear Sources
Low-ionization nuclear emission-line regions (LINERs) are specially interesting objects since not only they represent the most numerous local Active Galactic …