![]() Gaia DR3 includes the radial velocity of 33 million stars, a volume of information five times higher to the one the second data set of the mission provided in 2018. The expert adds that “this separation provides us with knowledge on the physical properties such as temperature, brightness and chemical composition, which is essential information for determining the age of the stars and deduce their origins”. As noted by Professor Carme Jordi, “for the first time, we can separate in detail the light we receive from the stars and that from other objects observed by Gaia”. One of the first scientific indications of the dataset now published are the light spectra of 220 million stars, which can be used to determine brightness, temperature, mass and chemical compositions with precision. The Gaia satellite, located 1.5 million away from the Earth in the opposite direction to the Sun in the Lagrange L2 point, has surveyed the sky through two telescopes which have provided scientific data to calculate the position, distance, speeds and physical features of nearly 2 billion stars. The largest low-resolution spectroscopy study ever This information will allow astronomers to rebuild the past and future evolution of the Galaxy over billions of years. Gaia is the ESA’s emblematic mission launched in December 2013 to create the most accurate and complete multi-dimensional map of our galaxy -the Milky Way-, with data on the position, speed and direction of motion, brightness, temperature and composition of nearly two billion galactic and extragalactic objects. Gaia Mission: the most accurate map of our galaxy For the moment, the Gaia mission exceeds the 2,850 days of sky observation, it has collected 100 terabytes of data and has documented 200-billion-star transits in its focal plane. Since the launch of Gaia in 2013, data sets have been released in 20, as well as a subgroup of the third data set in 2020. The published data of the Gaia Data Release 3 (DR3) were collected during thirty-four months, between Jand May 28, 2017. This new data release, which includes a total of 1.8 billion stars of the Milky Way, provides the international astronomic collective with an unprecedented perspective of stellar characteristics and their life cycle, as well as the structure and evolution of the Galaxy. The BSC user support team has collaborated in data storage and transfer to other processing centres involved in the project. On the other hand, the P圜OMPSs programming model and the dislib machine learning library developed by the BSC's Workflows and Distributed Computing group have been used in the software developed by the Gaia team to search for new open star clusters. Specifically, since the beginning of the project, BSC has contributed almost 58 million hours, and for this third release of data, it has contributed almost 33 million hours. The Barcelona Supercomputing Center-Centro Nacional de Supercomputación (BSC-CNS) has contributed to Gaia since its beginning, providing millions of hours of supercomputing in the MareNostrum supercomputer and programming models. ![]() Since its beginning, Gaia has counted on the participation of a team of astronomers and engineers of the Institute of Cosmos Sciences of the University of Barcelona (ICCUB) and the Institute of Space Studies of Catalonia (IEEC), led by researchers Carme Jordi, Xavier Luri and Francesca Figueras, from the Department of Quantum Physics and Astrophysics (UB-ICCUB-IEEC). ![]() The largest collection of astrophysical data for stars of the Milky Way, a catalogue of binary stars that surpasses all the scientific work from the past two centuries and the first low-resolution and radial velocity spectroscopy studies carried out to date: these are some of the scientific findings of the third catalogue release of the Gaia mission, published by the European Space Agency (ESA) on Monday, June 13. The new Gaia data catalogue includes information on the population of asteroids of the Solar System which is key for studying the origins of this planetary system Data on binary stars surpass the scientific work carried out during the last two centuries.For the first time, it includes data on low-resolution and radial velocity spectroscopy.The third release of the results of the European Space Agency Gaia mission presents the largest collection of astrophysical data on the Milky Way.
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