The small fraction of dark matter in the galaxy NGC1052-DF4 has worried the astronomical community for several years. Now a team of researchers from the Instituto de Astrofísica de Canarias (IAAC) the University of La Laguna (ULL) the University of New South Wales, the Insituto de Astrofísica de Andalucia, and NASA’S Ames Research Center have found a mechnism which can esplain it. This finding, which is to be published in the scientific journal The Astrophysical Journal, manages to make this phenomenon fit with accepted models of formation and evolution of galaxies.
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.
A mechanism for removing dark matter from galaxies has been foundAdvertised on
A new stellar site for the formation of very heavy elements
The recently discovered phosphorus-rich stars pose a challenge to stellar evolution and nucleosynthesis (that is, the formation of chemical elements in stellar interiors) theory, as none of the existing models can explain their extremely peculiar chemical abundances pattern. Apart from the large phosphorus (P) enhancement, such stars also show enhancement in other light (O, Mg, Si, Al) and heavy (e.g., Ce) elements. Thanks to the Spanish Service Time at the Nordic Optical Telescope, we have recently obtained high-resolution optical spectra of two optically bright phosphorus-rich starsAdvertised on
A Plague of Magnetic Spots Among the Hot Stars of Globular Clusters
For more than six decades, the quest to understand the formation of hot (about 20,000−30,000 K) extreme horizontal branch (EHB) stars in Galactic globular clusters has remained one of the most elusive in stellar evolutionary theory. Here we report on two discoveries that challenge the idea of the stable luminosity of EHB stars. The first mode of EHB variability is periodic and cannot be ascribed to either binary evolution or pulsation. Instead, we attribute it here to the presence of magnetic spots: superficial chemical inhomogeneities whose projected rotation induces the variability. TheAdvertised on
Colouring asteroid Bennu
The main objective of the NASA OSIRIS-REx mission is the collection of material from the surface of primitive asteroid (101955) Bennu, and to bring it back to the Earth. To provide general context to the results obtained from the analysis of this sample it is fundamental to carry out an extensive study of the surface of the asteroid. To do that, the spacecraft is provided, among other instruments, with an optical camera (MapCam) equipped with 4 color filters b’, v, w, and x, centered at 473, 550, 698, and 847 nm, respectively. This set-up allowed to do color studies, i.e., to analyze how theAdvertised on
Astrophysical Technology for early detection of diabetic foot neuropathy
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
The IAC renews its WiFi network platform
The Instituto de Astrofísica de Canarias (IAC) has finished, during October, with the help of FEDER funds, the renewal of the whole platform of the Wifi network of its facilities. The new technology, provided by Aruba, will allow higher speeds, improving the quality of the signal and increasing the security of the users. This is a project which has been steadily implemented centre by centre and, during the health crisis, it has been given a push forward in the Teide Observatory and in the Roque de los Muchachos Observatory, and completed in record time, mainly due to the absence of personnelAdvertised on