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CERN Document Server Намерени са 2,035 записа  1 - 10следващкрай  отиване на запис: Търсенето отне 5.16 секунди. 
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Gaia Early Data Release 3 - The celestial reference frame (Gaia-CRF3) / Gaia Collaboration
Gaia-CRF3 is the celestial reference frame for positions and proper motions in the third release of data from the Gaia mission, Gaia DR3 (and for the early third release, Gaia EDR3, which contains identical astrometric results). The reference frame is defined by the positions and proper motions at epoch 2016.0 for a specific set of extragalactic sources in the (E)DR3 catalogue. [...]
arXiv:2204.12574.- 2022-11-01 - 31 p. - Published in : Astron. Astrophys. 667 (2022) A148 Fulltext: document - PDF; 2204.12574 - PDF;
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Gaia Data Release 3: The extragalactic content / Gaia Collaboration
The Gaia Galactic survey mission is designed and optimized to obtain astrometry, photometry, and spectroscopy of nearly two billion stars in our Galaxy. Yet as an all-sky multi-epoch survey, Gaia also observes several million extragalactic objects down to a magnitude of G~21 mag. [...]
arXiv:2206.05681.- 2023-06-01 - 33 p. - Published in : Astron. Astrophys. 674 (2023) A41 Fulltext: 2206.05681 - PDF; document - PDF;
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Gaia Data Release 3 - Summary of the content and survey properties / Gaia Collaboration
Context. We present the third data release of the European Space Agency’s Gaia mission, Gaia DR3. [...]
arXiv:2208.00211.- 2023-06-01 - 22 p. - Published in : Astron. Astrophys. 674 (2023) A1 Fulltext: PDF;
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Gaia Data Release 3 - Stellar multiplicity, a teaser for the hidden treasure / Gaia Collaboration
Context.TheGaiaDR3 catalogue contains, for the first time, about 800 000 solutions with either orbital elements or trend parameters for astrometric, spectroscopic, and eclipsing binaries, and combinations of these three.Aims.With this paper, we aim to illustrate the huge potential of this large non-single-star catalogue.Methods.Using the orbital solutions and models of the binaries, we have built a catalogue of tens of thousands of stellar masses or lower limits thereof, some with consistent flux ratios. Properties concerning the completeness of the binary catalogues are discussed, statistical features of the orbital elements are explained, and a comparison with other catalogues is performed.Results.Illustrative applications are proposed for binaries across the Hertzsprung-Russell Diagram (HRD). [...]
arXiv:2206.05595.- 2023-06 - 57 p. - Published in : Astron. Astrophys. 674 (2023) A34 Fulltext: PDF;
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Gaia Data Release 3: Chemical cartography of the Milky Way / Gaia Collaboration
Gaia DR3 opens a new era of all-sky spectral analysis of stellar populations thanks to the nearly 5.6 million stars observed by the RVS and parametrised by the GSP-spec module. The all-sky Gaia chemical cartography allows a powerful and precise chemo-dynamical view of the Milky Way with unprecedented spatial coverage and statistical robustness. [...]
arXiv:2206.05534.- 2023-06 - 49 p. - Published in : Astron. Astrophys. 674 (2023) A38 Fulltext: 2206.05534 - PDF; Publication - PDF;
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Euclid. IV. The NISP Calibration Unit / Euclid Collaboration
The near-infrared calibration unit (NI-CU) on board Euclid's Near-Infrared Spectrometer and Photometer (NISP) is the first astronomical calibration lamp based on light-emitting diodes (LEDs) to be operated in space. [...]
arXiv:2405.13494. - 21.
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Euclid: Constraining linearly scale-independent modifications of gravity with the spectroscopic and photometric primary probes / Euclid Collaboration
The future Euclid space satellite mission will offer an invaluable opportunity to constrain modifications to Einstein's general relativity at cosmic scales. We focus on modified gravity models characterised, at linear scales, by a scale-independent growth of perturbations while featuring different testable types of derivative screening mechanisms at smaller non-linear scales [...]
arXiv:2306.12368.- 2024-10-01 - 22 p. - Published in : Astron. Astrophys. 690 (2024) A133 Fulltext: 2306.12368 - PDF; Publication - PDF; document - PDF;
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Euclid. I. Overview of the Euclid mission / Euclid Collaboration
The current standard model of cosmology successfully describes a variety of measurements, but the nature of its main ingredients, dark matter and dark energy, remains unknown. [...]
arXiv:2405.13491. - 94.
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Euclid preparation. Sensitivity to non-standard particle dark matter model / Euclid Collaboration
The Euclid mission of the European Space Agency will provide weak gravitational lensing and galaxy clustering surveys that can be used to constrain the standard cosmological model and its extensions, with an opportunity to test the properties of dark matter beyond the minimal cold dark matter paradigm. [...]
arXiv:2406.18274 ; TTK-24-26. - 31.
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Planck 2015 results. X. Diffuse component separation: Foreground maps / Planck Collaboration
Planck has mapped the microwave sky in nine frequency bands between 30 and 857 GHz in temperature and seven bands between 30 and 353 GHz in polarization. In this paper we consider the problem of diffuse astrophysical component separation, and process these maps within a Bayesian framework to derive a consistent set of full-sky astrophysical component maps. [...]
arXiv:1502.01588.- 2016-09-20 - 63 p. - Published in : Astron. Astrophys. 594 (2016) A10 Fulltext: PDF; External link: Preprint
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