News

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.

  • One method for detecting extrasolar planets, used on the CoRoT and Kepler missions, both dedicated also to the Asteroseismology observations, is calculating the extent to which a star's light dims when a planet transits in front of it.Photograph courtesy
    When scientists realised that observing and analysing oscillations in the Sun could provide information about its interior, it was only a matter of time before Helioseismology was put to work on other stars
    Advertised on
  • Turbulence caused by convection beneath the surface of the Sun and other stars produces acoustic vibrations that can be observed through movements on the surface and the resulting variations in brightness. Photograph courtesy of: HAO
    When we look at the Sun we cannot penetrate beyond its outer surface, the photosphere, which emits the photons that make up the radiation we can see. So how can we find out what is inside it?
    Advertised on
  • First results of Herschel and the HerMES extragalactic survey.
    ESA's Herschel Space Observatory was launched on 14 May 2009. After a short commissioning and performance verification period, the science demonstration observations started in September 2009. Herschel is now carrying out routine science observations. The three instruments (SPIRE, PACS and HIFI) are working extremely well. The IAC is part of the SPIRE and PACS instrument consortia and has contributed flying hardware and software. The first results of the many Herschel Key Projects were presented at the ESLAB 2010 symposium in ESTEC (May 2010) and have been published in July 2010 in a special
    Advertised on
  • Recent observations of the rotation curve of M31 show a rise of the outer part that cannot be understood in terms of standard dark matter models or perturbations of the galactic disk by M31?s satellites. Here, we propose an explanation of this dynamical feature based on the in?uence of the magnetic ?eld within the thin disk. We have considered standard mass models for the luminous mass distribution, a Navarro?Frenk?White model to describe the dark halo, and we have added up the contribution to the rotation curve of a magnetic ?eld in the disk, which is described by an axisymmetric pattern
    Advertised on
  • We present a visual determination of the number of bright points (BPs) existing in the quiet Sun, which are structures thought to trace intense kG magnetic concentrations. The measurement is based on a 0farcs1 angular resolution G-band movie obtained with the Swedish Solar Telescope at the solar disk center. We find 0.97 BPs Mm-2, which is a factor 3 larger than any previous estimate. It corresponds to 1.2 BPs per solar granule. Depending on the details of the segmentation, the BPs cover between 0.9% and 2.2% of the solar surface. Assuming their field strength to be 1.5 kG, the detected BPs
    Advertised on