Jul 28, 2020
Link between magnetars and Fast radio bursts
An international campaign including ground-based and space telescopes, including the INTEGRAL satellite, discovered end of April 2020 very short pulses in both X-rays and radio waves coming from a compact object in the Galaxy, the magnetar SGR 1935+2154. The simultaneous observation of these signals is seen for the first time in this type of source and attests a connection between magnetars and Fast radio bursts, a class of radio sources whose origin is today poorly known.
Jun 04, 2020
On May 18th 2020, ESO formally closed the preliminary design review of the ELT/METIS thermal infrared instrument. Following this important milestone, the instrument enters into the final design phase (phase C) in which the its design will be frozen just before its building.
Jun 02, 2020
VLT/SPHERE observations of the star AB Aurigae pinpoint a giant planet in formation
Motivated by unusual features recently observed with the ALMA instrument in a proto-planetary disc around the star AB Aurigae, an international team of astrophysicists including a researcher from the Department of Astrophysics / Laboratory AIM of the CEA-Irfu of Paris-Saclay has just obtained a very sharp high-contrast image of a S-shasped sub-structure in the gaseous and dusty disc surrounding the star.
May 20, 2020
The fourth catalog of Fermi-LAT sources comes on line
The Fermi-LAT collaboration has published its fourth source catalog, named 4FGL. Based on eight years of data, it contains 5064 celestial objects emitting gamma rays at energies around 1 GeV, adding more than 2000 high-energy sources to the previous collection (published in 2015). More than one fourth of the objects are of unknown nature, calling for numerous follow-up studies.
Mar 13, 2020
The highest magnetic fileds of the Universe reproduced by numerical simulations
Magnetars are neutron stars endowed with the strongest magnetic fields observed in the Universe, but their origin remains controversial.
Feb 13, 2020
To measure cosmological parameters, the Euclid space telescope will use two main probes: gravitational lensing (Weak Gravitational Lensing) and galaxy distribution (Galaxy Clustering). These measurements will allow us to study dark energy and dark matter, which affect the growth of cosmic structures and the accelerated expansion of the Universe.
Jan 23, 2020
Arrived safely. The focal plane of the visible imager on the Euclid satellite has just been delivered by Irfu to the laboratory responsible for the instrument (MSSL/UK) to continue its integration into the satellite, which is scheduled to take off in 2022.  The first studies of this focal plane have been carried out at Irfu since 2010 and after almost 10 years of development and testing, it was fully tested by Irfu in 2019. This Focal Plane is composed of 36 CDDs totalizing more than 600 million pixels.
Jan 13, 2020
A collision of the Milky Way with a small galaxy accurately dated by the study of the star ν Indi
ν Indi is a bright star (visual magnitude mv = 5.3) visible with the naked-eye from the southern hemisphere. By using ground data (ESO telescopes), space data (Gaia and Tess missions) and by combining very diverse spectroscopic, astrometric, kinematic or asteroseismological information, an international team including two researchers from the Department of Astrophysics / AIM Laboratory of CEA-Saclay was able to determine the epoch, between 11.6 and 13.
Dec 21, 2019
The European Space Agency is shaping its science programme for the period 2035-2050
After the Horizon 2000 programme started in 1983, followed by its extension Horizon 2000 Plus, the European Space Agency (ESA) is committed until 2035 into the Cosmic Vision programme that includes the launches of Athena (2031) and LISA (2034). To plan its scientific priorities beyond this date, ESA has solicited the community through a call for ideas/projects.
Dec 04, 2019
The hot heart of the SN 1987A supernova
An international team, led by astronomers from Cardiff University, with the contribution of the Astrophysics Department of CEA-Irfu, may have spotted for the first time the compact remains of the last star explosion visible by eye that occurred on February 23, 1987 in a nearby galaxy, the Large Magellanic Cloud, only 160 000 light-years away.
Nov 26, 2019
Dense molecular filaments are the cradles of stars
An international team led by the Astrophysics Department-AIM Laboratory of CEA-Irfu has just obtained new clues about the origin of star mass distribution, combining observational data from the large interferometer ALMA and the APEX radio telescope operated by the European Austral Observatory (ESO) and the Herschel Space Observatory.
Nov 20, 2019
Microscope satellite consolidates the Einstein Equivalence Principle
Testing the equivalence principle, a fundamental principle of the general relativity developed by Albert Einstein from which the universality of free fall derives, that is the challenge undertaken by the Microscope spacecraft.
Nov 20, 2019
After a decade-long search, scientists have for the first time detected a gamma-ray burst in very-high-energy gamma light. This discovery was made in July 2018 by the H.E.S.S. collaboration using the  huge 28-m telescope of the H.E.S.S. array in Namibia. Surprisingly, this Gamma-ray burst, an extremely energetic flash following a cosmological cataclysm, was found to emit very-high-energy gamma-rays long after the initial explosion. This discovery was published in Nature.    
Oct 11, 2019
Sounding the cosmic dust around proto-stars
An international team led by researchers from the CEA Paris-Saclay Astrophysics Department (DAp) have probed for the first time the dust envelopes surrounding stars in formation (so-called Class 0 protostars) thanks to the large interferometer NOEMA (former Plateau de Bure, France). Surpisingly, the researchers discovered the presence of large grains whose size grows as one gets closer to the central star.
Oct 07, 2019
Lisa Bugnet is one of 35 young women researchers who won the L'Oréal-Unesco Fellowships for Women in Science in 2019. As an asteroseismologist at the Dynamic Laboratory of Stars, (Exo)planets and their Environment of the DAP/Irfu, she uses seismic waves emitted by stars to probe their heart and understand their evolution from birth to the end of their life.
Oct 06, 2019
Optical follow-up of gravitionnal waves
The first results of the space mission SVOM (for Space-based multi-band astronomical Variable Objects Monitor) have just fallen before the launch scheduled for the end of 2021. How is this possible? Quite simply because this ambitious Franco-Chinese mission, which aims at studying gamma-ray bursts of the Universe, is also developing a network of ground-based cameras able to detect the emission of visible light that follows the outbreak of these bursts, the most violent known explosions.
Aug 07, 2019
"Invisible" galaxies that question the models of the Universe evolution
A study conducted by astrophysicists of the Department of Astrophysics-AIM Laboratory of CEA-Irfu has revealed a large number of galaxies as massive as the Milky Way in the distant universe, thanks to the large interferometer ALMA (Atacama Large Millimeter/submillimeter Array) in Chile. These galaxies have hitherto remained invisible due to the attenuation of their brightness by interstellar dust.
Jul 19, 2019
The TESS satellite discovers a hot Saturn orbiting a sub-giant star
The TESS satellite, a NASA mission in orbit since one year, has just discovered a planet-like hot-Saturn with the method of transit in orbit around its host star, TOI-197, whose physical properties have been computed from asteroseismological measurements (study of the star's vibrations) and that with the same instrument. The planet discovered is a hot Saturn orbiting a star of mass close to that of the Sun but more advanced in the stellar evolution cycle.
Jul 08, 2019
The LISA experiment will be able to detect planets throughout the Galaxy
The recent detections of gravitational waves, tiny vibrations of space-time, have opened a new window in the observation of the Universe. Two researchers, including Camilla Danielski from the Astrophysics Department of CEA-Irfu, have just demonstrated that, when these waves are emitted by two dense stars in orbit, they can be disturbed if a planet is in orbit around this pair of stars.
Jun 30, 2019
A second life for the CEA VISIR camera
The first comprehensive planetary search campaign around the nearest star Alpha Centauri A has just been performed on the VLT telescope of the Southern European Observatory (ESO) using the NEAR infrared instrument (Near Earths in the AlphaCen Region). Based on the VISIR infrared camera built under the coordination of the Astrophysics Department of CEA-Irfu and in service at ESO since 2004, the NEAR instrument is designed to detect planets with the Earth's mass and above.
Mar 20, 2019
Two chimneys of hot gas found around the central back hole
Thanks to the X-ray satellites Chandra and XMM-Newton, an international team including the Department of Astrophysics of CEA-Irfu has just discovered the existence of two bubbles of hot gas escaping to distances of about 500 light-years, on both sides of the massive black hole environment, in the center of our galaxy.
Mar 04, 2019
The large ALMA interferometer reveals a population of galaxies not yet detected by the Hubble Space Telescope
An international team, led by researchers from the Department of Astrophysics/AIM Laboratory of CEA-Irfu has just highlighted a new population of very remote galaxies, which had so far escaped the deepest observations of the Universe. During the summer of 2016, at more than 5000 meters of altitude on the Chilean highlands, the antennas of the large interferometer ALMA (Atacama Large Millimeter/submillimeter Array) scrutinized for more than 20 hours one of the best studied regions of the sky.
Feb 28, 2019
By exploring a sample of 16 of the closest protostars, thanks to the interferometric array of the Institute of millimetric radio astronomy (IRAM), an international team of astronomers, led by researchers from the Department of Astrophysics-AIM Laboratory of CEA IRFU, has just shown that a majority of disks where planets will be formed are born much smaller than expected.
Jan 27, 2019
An international collaboration, involving the Astrophysics Department-Laboratory AIM of CEA irfu, participated in the study of an exoplanetary system, Kepler-107 and revealed an amazing distribution of its 4 planets of which two seem potentially resulting from a giant impact. Thanks to asteroseismology (the study of star vibrations) and the modeling of planetary transits, researchers have been able to determine the mass and radius of the central star and its planets with great precision.
Jan 21, 2019
On November 29, 2018, the first version of the ECU software for the ECLAIRs instrument was delivered. This computer, called Gamma Camera Management and Scientific Processing Unit, will be set on the Franco-Chinese SVOM satellite, designed to study gamma-ray bursts. It will allow the management of the ECLAIRs instrument and the detection of gamma-ray bursts by the SVOM mission in real time on board.
Nov 08, 2018
Outstanding results from this Japanese X-rays observatory
Despite a short period of activity, the japanese space agency (Jaxa) Hitomi satellite has shown its full potential by delivering relevant information’s on several celestial objects.
Nov 07, 2018
A prototype of the MXT camera arrived at the CNES in Toulouse on 25 October 2018. This is the Structural and Thermal Model (STM), which will be integrated into the telescope that will be sent to China to be mounted on the SVOM satellite Qualification Model. The objective of this model is to validate the thermo-mechanical design of the camera. It also makes it possible to check the manufacturing and assembly capacity of the various components, which represent more than 1,000 elements.
Oct 01, 2018
Impressing results from a large X-ray catalog of galaxy clusters
Using the ESA's XMM-Newton observatory, an international team, led by Marguerite Pierre of the Astrophysics Department of CEA-Irfu, has revealed the latest results of the XXL survey, the largest observation program X-ray produced to date by the XMM satellite. The second batch of data just published in a special issue of the journal Astronomy & Astrophysics, includes information on 365 galaxy clusters and 26,000 active galactic nuclei (AGN).
Sep 26, 2018
X-ray photons were detected for the first time in late August 2018 with an engineering model of the SVOM MXT focal plane. This is an important step towards the validation of the design of the detection chain. The MXT telescope, for Microchannel X-ray Telescope, will be flown on board the SVOM satellite, a collaborative project between France (CNES) and China (CAS, CNSA) to study gamma-ray bursts. It aims at detecting soft X-rays (0.
May 23, 2018
The European Spatial Agency retains the mission of exploration of galaxies
The SPICA infrared space telescope has been shortlisted by the European Space Agency (ESA) to participate in the final competition which will see in September 2021 the choice of the next mission of medium size ESA (M5 mission). SPICA is a large infrared telescope (diameter 2.5 m) fully cooled to a temperature of only a few degrees above absolute zero.


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