The first image of a new gaseous component in a planetary nebula.
False color image of the planetary nebula NGC 6778. In blue, the emission associated with weak lines of ion O++ recombination, taken with the OSIRIS tunable filter blue instrument in the GTC. In green, emission of the same ion in the excited lines by coll
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Jorge García Rojas: jogarcia_ext [at] iac.es (jogarcia_ext[at]iac[dot]es)
Accretion disks around compact objects are expected to enter an unstable phase at high luminosity. One instability may occur when the radiation pressure generated by accretion modifies the disk viscosity, resulting in the cyclic depletion and refilling of the inner disk on short timescales. Such a scenario, however, has only been quantitatively verified for a single stellar-mass black hole. Although there are hints of these cycles in a few isolated cases, their apparent absence in the variable emission of most bright accreting neutron stars and black holes has been a continuing puzzle. Here
Thanks to images obtained by the James Webb Telescope (JWST), an international scientific team in which the Instituto de Astrofísica de Canarias (IAC) participates has been able to verify that galaxies in the early universe are usually flat and elongated, and not round or spiral like the nearest galaxies. International research has found, by analysing high-resolution, infrared images of the JWST, that flattened oval disc and tube-shaped galaxies were much more common when the universe was between 600 million and 6 billion years old. In contrast, the nearest galaxies have clearly defined
The first Canary Earth Observation Satellite, belonging to the Instituto de Astrofísica de Canarias (IAC), has successfully passed all the pre-launch technical tests, and is on the way to the United States for launch from California before the end of the year. ALISIO-1 ( Advanced Land-Imaging Satellite for Infrared Observations) is the first Canary satellite which will orbit the Earth, in the framework of the ALISIO space programme, led by the IAC and coordinated by the IACTEC-Space group. In 2018, the team gained its first success after the launch of an atmospheric sounding balloon with