Even though the conference planned by the Instituto de Astrofísica de Canarias (IAC) for celebration in La Palma has been postponed until mid-April 2021, the meeting is being held on-line from 5th to 9th October. In this workshop we will discuss a reference document for governments, city councils and companies so that they have a legal and technical basis to avoid the possible negative impact of the new technologies on the observation of the night sky and on biodiversity. Link to the programme: http://research.iac.es/congreso/quietdarksky2020/pages/program.php For thousands of years the
This section includes scientific and technological news from the IAC and its Observatories, as well as press releases on scientific and technological results, astronomical events, educational projects, outreach activities and institutional events.
Dark and quiet skies for science and societyAdvertised on
The CHEOPS mission measures the properties of one of the hottest and most extreme extrasolar planets
CHEOPS, the new exoplanet mission of the European Space Agency (ESA), in which the Instituto de Astrofísica de Canarias (IAC) is participating, has observed a nearby planetary system which contains one of the hottest and most extreme extrasolar planets known until now: WASP-189 b. The result, the first from this mission, is being published in Astronomy & Astrophysics.Advertised on
Astronomers find the first galaxy whose ultraviolet luminosity is comparable to that of a quasar
An international scientific team, led by researchers at the Centre for Astrobiology (CAB, CSIC-INTA) and with participation by the Instituto de Astrofísica de Canarias (IAC), have found the galaxy BOSS-EUVLG1. This is the galaxy with star formation but almost no dust, the most luminous of its type known up to now. It was found using observations made with the Gran Telescopio Canarias (GTC), at the Roque de los Muchachos Observatory, (Garafía, La Palma, Canary Islands), and with the ATACAMA Large Millimetre/submillimetre Array (ALMA), in Chile. The discovery was recently published in theAdvertised on
Large scale dynamical differences between active and non-active galaxies in the local Universe
Observational evidences suggest a co-evolution of the central supermassive black holes and their host galaxies. In some of them, the black hole is ingesting the material surrounding it at a very high rate, emitting a large quantity of energy. In those cases we say that the galaxy has an active nucleus (AGN). Studying the mechanisms which control the relation between the active nucleus and the rest of the galaxy is essential to understand how these objects form and evolve, and to be able to throw light on this question we need to compare active and non-active galaxies. Here, we first identifyAdvertised on
Is the Large Magellanic Cloud spiral arm a stable structure?
Some galaxies in the Universe display beautiful and appealing features known as "spiral arms". However, not all galaxies show spiral arms in the same manner. Among the variety of cases the Large Magellanic Cloud (LMC), a dwarf galaxy infalling towards the Milky Way, stands out. The LMC is the prototype of an entire family of galaxies, the Magellanic Spirals that are characterised by the presence of a barred stellar structure near their centres and a single spiral arm. Spiral patterns can form after galactic collisions, with subsequent star formation piling up in these arms. Nevertheless, weAdvertised on
The impact of strong recombination on temperature determination in planetary nebulae
The long-standing difference in chemical abundances determined from optical recombination lines and collisionally excited lines raises questions about our understanding of atomic physics, as well as the assumptions made when determining physical conditions and chemical abundances in astrophysical nebulae. Here, we study the recombination contribution of [O III] 4363 and the validity of the line ratio [O III] 4363/4959 as a temperature diagnostic in planetary nebulae with a high abundance discrepancy. We derive a fit for the recombination coefficient of [O III] 4363 that takes into accountAdvertised on