The first stars to form after the Big Bang and the Dark Era were very massive and played a leading role during the reionization epoch. From that moment onwards photons could travel unhindered in space, bringing us information about distant objects. The main difference between the first stars and those seen at present is that the former were formed solely from hydrogen and helium, in the absence of metals. Metal-poor massive stars are therefore fundamental to our understanding of the early stages of the Universe. New observations with the Gran Telescopio CANARIAS(GTC) take us a step closer to understanding stars in the early Universe. This work has been published in the journal Astronomy & Astrophysics.
It may interest you
At present, the formation of galaxies is difficult to understand without the presence of a ubiquitous, but mysterious component, termed dark matter. Astronomers have measure how much dark matter there is around galaxies, and have found that it varies between 10 and 300 times the quantity of visible matter. However, a few years ago, the discovery of a very diffuse object, named Dragonfly 44, changed this view. It was found that this galaxy has 10,000 times more dark matter than the stars. Taken back by this finding, astronomers have made efforts to see whether this object is really anomalousAdvertised on
The researchers Juan A. Fernández-Ontiveros, of the Istituto Nazionale di Astrofisica (INAF) in Rome and Teo Muñoz-Darias, of the Instituto de Astrofísica de Canarias (IAC), have written an article in which they describe the different states of activity of a large sample of supermassive black holes in the centres of galaxies. They have classified them using the behaviour of their closest “relations”, the stellar mass black holes in X-ray binaries. The article has just been published in the journal Monthly Notices of the Royal Astronomical Society (MNRAS).Advertised on
Today, November 14th, World Diabetes Day, we celebrate that the prototype PINRELL (Prototype for INfraREd analysis of Lower Limbs) of the Medical Technology Programme (TECMED) of IACTEC, has passed the preliminary proofs of concept and is in the initialization phase for the start of clinical trials. The prototype has been developed in the programme of Medical Technology within IACTEC, the area of technological and business collaboration of the Instituto de Astrofísica de Canarias (IAC), which has economic support (Training Programme) and infrastructure support (the IACTEC building) from theAdvertised on