We detect a transiting rocky planet with an orbital period of 1.467 days around the nearby red dwarf star Gliese 486. The planet Gliese 486 b is 2.81 Earth masses and 1.31 Earth radii, a composition similar to that of Venus or Earth, as determined from exquisite radial velocity data and photometric light curves. The host star is at a distance of 26 light-years, very bright, and observable from both hemispheres of Earth. The stellar and planet properties indicate that despite the hot surface temperatures it is possible that the planet conserved part of its original atmosphere, making it an ideal candidate for emission and transit spectroscopy studies with the next generation of ground- and space-based instruments.
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The Instituto de Astrofísica de Canarias is taking part in the workshop "Dark and Calm Skies for the present and future of Astronomy", which will be held in Brussels on Monday 10 July. The aim of the workshop is to present the current situation, needs and challenges of this area of science; to show the work carried out by the Committee on the Peaceful Uses of Outer Space (COPUOS), part of the United Nations General Assembly; and to analyse the perspective of the EU's space policy. The increase in light pollution and satellite constellations is one of the first issues to be discussed by SpainAdvertised on
Overlaps at the Frontiers of Astrophysics, Cosmology and Particle Physics at the XXXIII Canary Islands Winter School of Astrophysics The type of matter we are made of and we are familiar with accounts only for 5% of the Universe. The rest is the so called Dark Universe, made of something named dark matter (27%), and something named dark energy (68%), two big mysteries. This year the Winter School of Astrophysics of the Instituto de Astrofísica de Canarias (IAC) has gathered renowned researchers on three fundamental fields: Astrophysics, Cosmology and Particle Physics, which converge into theAdvertised on
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. HereAdvertised on