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.

  • The spatial profiles of the observed and expected [O III] 4363 (orange and green, respectively), residuals from subtracting the expected collisional [O III] 4363 profile from the observed one (red), and the O II 4649 profile scaled (blue).
    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 account

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  • Noticia de prueba (inglés)
    Noticia de prueba (inglés)

    Publicación automática (comprobación)

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  • Photogram from an animation which shows the ultrahot Neptune orbiting its star Credit: Ricardo Ramirez, University of Chile
    The first “ultrahot Neptune” is discovered

    A team of astronomers from the University of Chile, in collaboration with the Instituto de Astrofísica de Canarias (IAC) and the University of La Laguna (ULL), has discovered the first “ultrahot Neptune”, which is in orbita round the nearby star LTT 9779. The planet is so close to its star that its year lasts only 19 hours, and the star’s radiation heats the planet to more than 1,700 degrees centigrade. At those temperaturas, the heavy elements such as iron can be ionized in the atmosphere and molecules can dissociate, which makes this a unique laboratory for studying the chemistry of

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  • Material exógeno Ryugu y Bennu
    Exogeneous material found on the surface of asteroids Ryugu and Bennu

    The two near-Earth asteroids Ryugu and Bennu, primary targets of the Hayabusa2 (JAXA) and OSIRIS-REx (NASA) space missions, keep surprising us. In two companion papers presented in Nature Astronomy, researchers have found exogenous bright material scattered across the asteroids’ surfaces. Members of the Solar System Group of the Instituto de Astrofísica de Canarias (IAC) have contributed to this discovery, in particular Dr. Eri Tatsumi, who is the first author of the paper presenting findings on Ryugu (Hayabusa2).

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  • Participants of the III Hispano-American Writers’ Festival during their visit to the Roque de los Muchachos Observatory. Credit: Juan Antonio González Hernández / IAC.
    Astronomy and Literature, together again in La Palma

    In the III Hispano-American Writers’ Festival, which is being celebrated in Los Llanos de Aridane (La Palma), three authors and two astrophysicists participated yesterday, Thursday, in a panel discussion on the theme “Looking at what no longer exists”. During the morning, a small group of those invited to the Festival, in which the Instituto de Astrofísica de Canarias is collaborating, visited the Roque de Los Muchachos Observatory in Garafía, satisfying the necessary health and security measures against COVID-19.

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  • Sunrise at equinox (19 Marzo 2019) from Lácara dolmen (La Nava de Santiago, Extremadura, Spain)
    The autumnal equinox from the Dolmen of Valdecaballeros

    Next Tuesday, September 22nd, at 13:30 UT the Earth will be at a specific point in its orbit round the Sun: the September equinox. The September and March equinoxes are the only days in the year when the Sun rises exactly in the east and sets exactly in the west, across the whole planet.

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