Search Publications
Gaia Data Release 3. Astrometric binary star processing
Arenou, Frédéric; Halbwachs, Jean-Louis; Teyssier, David +6 more
Context. The Gaia Early Data Release 3 contained the positions, parallaxes, and proper motions of 1.5 billion sources, some of which did not show a good fit to the `single star' model. Binarity is one of the causes of this.
Aims: Four million of these stars were selected and various models were tested to detect binary stars and to derive thei…
Gaia Data Release 3. Mapping the asymmetric disc of the Milky Way
Prusti, T.; Mazeh, T.; Zucker, S. +445 more
Context. With the most recent Gaia data release, the number of sources with complete 6D phase space information (position and velocity) has increased to well over 33 million stars, while stellar astrophysical parameters are provided for more than 470 million sources, and more than 11 million variable stars are identified.
Aims: Using the astr…
Gaia Data Release 3. External calibration of BP/RP low-resolution spectroscopic data
Gilmore, G.; Harrison, D. L.; Fouesneau, M. +46 more
Context.Gaia Data Release 3 contains astrometry and photometry results for about 1.8 billion sources based on observations collected by the European Space Agency (ESA) Gaia satellite during the first 34 months of its operational phase (the same period covered by Gaia early Data Release 3; Gaia EDR3). Low-resolution spectra for 220 million sources …
Gaia Data Release 3. Chemical cartography of the Milky Way
Prusti, T.; Mazeh, T.; Zucker, S. +447 more
Context. The motion of stars has been used to reveal details of the complex history of the Milky Way, in constant interaction with its environment. Nevertheless, to reconstruct the Galactic history puzzle in its entirety, the chemo-physical characterisation of stars is essential. Previous Gaia data releases were supported by a smaller, heterogeneo…
Gaia Data Release 3. Specific processing and validation of all-sky RR Lyrae and Cepheid stars: The RR Lyrae sample
Szabados, L.; Audard, M.; Andrae, R. +18 more
Context. RR Lyrae stars are excellent tracers of the oldest stars (ages ≳ 9-10 Gyr) and standard candles for measuring the distance to stellar systems that are mainly composed of an old stellar population. The Gaia Third Data Release (DR3) publishes a catalogue of full-sky RR Lyrae stars observed during the initial 34 months of science operations.…
Gaia Data Release 3. The Galaxy in your preferred colours: Synthetic photometry from Gaia low-resolution spectra
Prusti, T.; Mazeh, T.; Zucker, S. +442 more
Gaia Data Release 3 provides novel flux-calibrated low-resolution spectrophotometry for ≃220 million sources in the wavelength range 330 nm ≤ λ ≤ 1050 nm (XP spectra). Synthetic photometry directly tied to a flux in physical units can be obtained from these spectra for any passband fully enclosed in this wavelength range. We describe how synthetic…
The MUSE Hubble Ultra Deep Field surveys: Data release II
Feltre, Anna; Bacon, Roland; Tresse, Laurence +30 more
We present the second data release of the MUSE Hubble Ultra-Deep Field surveys, which includes the deepest spectroscopic survey ever performed. The MUSE data, with their 3D content, amazing depth, wide spectral range, and excellent spatial and medium spectral resolution, are rich in information. Their location in the Hubble ultra-deep field area, …
Gaia Data Release 3. Astrometric orbit determination with Markov chain Monte Carlo and genetic algorithms: Systems with stellar, sub-stellar, and planetary mass companions
Holl, B.; Sahlmann, J.; Sozzetti, A. +8 more
Context. The astrometric discovery of sub-stellar mass companions orbiting stars is exceedingly hard due to the required sub-milliarcsecond precision, limiting the application of this technique to only a few instruments on a target-per-target basis and to the global astrometry space missions HIPPARCOS and Gaia. The third Gaia data release (Gaia DR…
Gaia Data Release 3. All-sky classification of 12.4 million variable sources into 25 classes
Gavras, Panagiotis; Ábrahám, Péter; Gomel, Roy +31 more
Context. Gaia DR3 contains 1.8 billion sources with G-band photometry, 1.5 billion of which with GBP and GRP photometry, complemented by positions on the sky, parallax, and proper motion. The median number of field-of-view transits in the three photometric bands is between 40 and 44 measurements per source and covers 34 month…
Quasi-periodic eruptions from impacts between the secondary and a rigidly precessing accretion disc in an extreme mass-ratio inspiral system
Lupi, Alessandro; Miniutti, Giovanni; Giustini, Margherita +7 more
X-ray quasi-periodic eruptions (QPEs) represent a recently discovered example of extreme X-ray variability associated with supermassive black holes. These are high-amplitude bursts recurring every few hours that are detected in the soft X-ray band from the nuclei of nearby galaxies whose optical spectra lack the broad emission lines typically obse…