J. Rendtel
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View article: Improved High-resolution Fast Imager
Improved High-resolution Fast Imager Open
The improved High-resolution Fast Imager (HiFI+) is a multiwavelength imaging filtergraph, which was commissioned at the GREGOR solar telescope at Observatorio del Teide, Izaña, Tenerife, Spain, in March 2022 – followed by science verifica…
View article: Tau Herculids 2022: Rate, number density, population index and geometrical effects from visual data
Tau Herculids 2022: Rate, number density, population index and geometrical effects from visual data Open
We analysed visual observation data of the Tau Herculids collected between 2022 May 28 and June 1. The population index for the entire sample is 2.4. For the pre-peak period we find r=2.57+-0.23, the peak period yields r=2.38+-0.06. The ZH…
View article: Modeling the past and future activity of the Halleyids meteor showers
Modeling the past and future activity of the Halleyids meteor showers Open
We present a new numerical model of the Eta-Aquariid and Orionid meteor shower. Through the modelling of millions meteoroids released from comet 1P/Halley, we simulate the characteristics of each Eta-Aquariid and Orionid apparition between…
View article: Activity of the Eta-Aquariid and Orionid meteor showers
Activity of the Eta-Aquariid and Orionid meteor showers Open
\nAims. We present a multi-instrumental, multidecadal analysis of the activity of the Eta-Aquariid and Orionid meteor showers for the purpose of constraining models of 1P/Halley’s meteoroid streams.\nMethods. The interannual variability of…
View article: The Spectrometer/Telescope for Imaging X-rays (STIX)
The Spectrometer/Telescope for Imaging X-rays (STIX) Open
Aims. The Spectrometer Telescope for Imaging X-rays (STIX) on Solar Orbiter is a hard X-ray imaging spectrometer, which covers the energy range from 4 to 150 keV. STIX observes hard X-ray bremsstrahlung emissions from solar flares and ther…
View article: Increasing Geminid meteor shower activity
Increasing Geminid meteor shower activity Open
Mathematical modelling has shown that activity of the Geminid meteor shower should rise with time, and that was confirmed by analysis of visual observations 1985–2016. We do not expect any outburst activity of the Geminid shower in 2017, e…