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- Alejandro Suárez Mascareño: asm_ext [at] iac.es (asm_ext[at]iac[dot]es)
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Dormant black holes in X-ray transients can be identified by the presence of broad Hα emission lines from quiescent accretion discs. Unfortunately, short-period cataclysmic variables can also produce broad Hα lines, especially when viewed at high inclinations, and are thus a major source of contamination. Here we compare the full width at half maximum (FWHM) and equivalent width (EW) of the Hα line in a sample of 20 quiescent black hole transients and 354 cataclysmic variables (305 from SDSS I to IV) with secure orbital periods (Porb) and find that: (1) FWHM and EW values decrease with PorbAdvertised on -
The IAC's Educational Project with Robotic Telescopes (PETeR) offers a new edition of its online teacher training entitled ‘ Investigate the Universe with Robotic Telescopes’. This activity, organised in collaboration with the STEAM area of the regional Ministry of Education of the Canary Islands Government, aims to provide knowledge and tools to incorporate astronomy in the classroom through the use of professional robotic telescopes, the analysis of scientific data and active learning methodologies. PETeR is an educational project that gives schools free access to professional telescopesAdvertised on -
The PLATO (PLAnetary Transits and Oscillations of Stars) space mission, led by the European Space Agency (ESA), has recently completed one of the most delicate phases of its development: the integration of its main components, the 26 scientific cameras and the service module that houses all the instrument's acquisition, processing, and control electronics. This stage, carried out at the facilities of the aerospace company OHB in Germany, marks a fundamental step toward the launch scheduled for December 2026 from French Guiana aboard an Ariane 6 rocket. “Almost eight years after ESA gave theAdvertised on