M. Riello
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View article: Metal-poor stars with disc-like orbits
Metal-poor stars with disc-like orbits Open
We used photometric metallicity estimates for about 700 000 stars in the surroundings of the Sun, with very accurate distances and 3D motions measures from Gaia DR3, to explore the properties of the metal-poor (−2.0 < [Fe/H] ≤ −1.5; MP) an…
View article: WINGS: A WIde-field nearby Galaxy-cluster survey: III. Deep near-infrared photometry of 28 nearby clusters
WINGS: A WIde-field nearby Galaxy-cluster survey: III. Deep near-infrared photometry of 28 nearby clusters Open
This is the third paper in a series devoted to the WIde-field Nearby Galaxy-cluster Survey (WINGS).WINGS is a long-term project aimed at gathering wide-field, multiband imaging and spectroscopy of galaxies in a complete sample of 77 X-ray …
View article: Metal-poor stars with disc-like orbits. Traces of the Galactic Disc at very early epochs?
Metal-poor stars with disc-like orbits. Traces of the Galactic Disc at very early epochs? Open
We use photometric metallicity estimates for about 700000 stars in the surroundings of the Sun, with very accurate distances and 3-D motions measures from Gaia DR3, to explore the properties of the metal-poor (-2.0<[Fe/H]<= -1.5; MP) and v…
View article: Photometric metallicity for 694 233 Galactic giant stars from <i>Gaia</i> DR3 synthetic Strömgren photometry
Photometric metallicity for 694 233 Galactic giant stars from <i>Gaia</i> DR3 synthetic Strömgren photometry Open
We used two previous calibrations and the standardised synthetic photometry in the v , b , and y Strömgren passbands from Gaia DR3 BP / RP spectra to obtain photometric metallicities for a selected sample of 694 233 old Galactic giant star…
View article: Photometric metallicity for 694233 Galactic giant stars from Gaia DR3 synthetic Stromgren photometry. Metallicity distribution functions of halo sub-structures
Photometric metallicity for 694233 Galactic giant stars from Gaia DR3 synthetic Stromgren photometry. Metallicity distribution functions of halo sub-structures Open
We use the calibrations by Calamida et al. and by Hilker et al., and the standardised synthetic photometry in the v, b, and y Stromgren passbands from Gaia DR3 BP/RP spectra, to obtain photometric metallicities for a selected sample of 694…
View article: <i>Gaia</i>Data Release 3
<i>Gaia</i>Data Release 3 Open
Context. Gaia Data Release 3 ( Gaia DR3) time series data may contain spurious signals related to the time-dependent scan angle. Aims. We aim to explain the origin of scan-angle-dependent signals and how they can lead to spurious periods, …
View article: <i>Gaia</i>Data Release 3
<i>Gaia</i>Data Release 3 Open
Context. Gaia has been in operations since 2014, and two full data releases (DR) have been delivered so far: DR1 in 2016 and DR2 in 2018. The third Gaia data release expands from the early data release (EDR3) in 2020, which contained the f…
View article: Gaia Data Release 3: Gaia scan-angle dependent signals and spurious periods
Gaia Data Release 3: Gaia scan-angle dependent signals and spurious periods Open
Context: Gaia DR3 time series data may contain spurious signals related to the time-dependent scan angle. Aims: We aim to explain the origin of scan-angle dependent signals and how they can lead to spurious periods, provide statistics to i…
View article: <i>Gaia</i>Data Release 3
<i>Gaia</i>Data Release 3 Open
Context. The Gaia third Data Release (GDR3) presents a catalogue of 474 026 stars (detected by processing a sample of about 30 million late-type stars) with variability induced by magnetic activity. About 430 000 of these stars are newly d…
View article: <i>Gaia</i>Data Release 3
<i>Gaia</i>Data Release 3 Open
Context. Blue (BP) and Red (RP) Photometer low-resolution spectral data are one of the exciting new products in Gaia Data Release 3 ( Gaia DR3). These data have also been used to derive astrometry and integrated photometry in Gaia Early Da…
View article: <i>Gaia</i>Data Release 3
<i>Gaia</i>Data Release 3 Open
Context. As part of Gaia Data Release 3 ( Gaia DR3), epoch photometry has been released for 1.2 million sources centred on M 31. This is a taster for Gaia Data Release 4 where all the epoch photometry will be released. Aims. In this paper,…
View article: Gaia Data Release 3: The Gaia Andromeda Photometric Survey
Gaia Data Release 3: The Gaia Andromeda Photometric Survey Open
Context. As part of Gaia Data Release 3 (Gaia DR3), epoch photometry has been released for 1.2 million sources centred on M31. This is a taster for Gaia Data Release 4 where all the epoch photometry will be released. Aims. In this paper th…
View article: <i>Gaia</i>Data Release 3
<i>Gaia</i>Data Release 3 Open
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 o…
View article: <i>Gaia</i>Data Release 3
<i>Gaia</i>Data Release 3 Open
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…
View article: Gaia Data Release 2. Observations of solar system objects
Gaia Data Release 2. Observations of solar system objects Open
Context. The Gaia spacecraft of the European Space Agency (ESA) has been securing observations of solar system objects (SSOs) since the beginning of its operations. Data Release 2 (DR2) contains the observations of a selected sample of 14,…
View article: Gaia Data Release 2. Observational Hertzsprung-Russell diagrams
Gaia Data Release 2. Observational Hertzsprung-Russell diagrams Open
Context. Gaia Data Release 2 provides high-precision astrometry and three-band photometry for about 1.3 billion sources over the full sky. The precision, accuracy, and homogeneity of both astrometry and photometry are unprecedented.: Aims.…
View article: Gaia Data Release 2. Variable stars in the colour-absolute magnitude diagram
Gaia Data Release 2. Variable stars in the colour-absolute magnitude diagram Open
The ESA Gaia mission provides a unique time-domain survey for more than 1.6 billion sources with G ≲ 21 mag. Aims. We showcase stellar variability in the Galactic colour-absolute magnitude diagram (CaMD). We focus on pulsating, eruptive,…
View article: Internal calibration of <i>Gaia</i> BP/RP low-resolution spectra
Internal calibration of <i>Gaia</i> BP/RP low-resolution spectra Open
Context. The full third Gaia data release will provide, for the first time, the calibrated spectra obtained with the blue and red Gaia slitless spectrophotometers (BP and RP, respectively). Gaia is a very complex mission and cannot be cons…
View article: <i>Gaia</i> Early Data Release 3
<i>Gaia</i> Early Data Release 3 Open
Context. Since July 2014, the Gaia mission has been engaged in a high-spatial-resolution, time-resolved, precise, accurate astrometric, and photometric survey of the entire sky. Aims. We present the Gaia Science Alerts project, which has b…
View article: Gaia Photometric Science Alerts
Gaia Photometric Science Alerts Open
Since July 2014, the Gaia mission has been engaged in a high-spatial-resolution, time-resolved, precise, accurate astrometric, and photometric survey of the entire sky. Aims: We present the Gaia Science Alerts project, which has been in op…
View article: <i>Gaia</i> Early Data Release 3
<i>Gaia</i> Early Data Release 3 Open
Context. The unprecedented astrometric precision of the Gaia mission relies on accurate estimates of the locations of sources in the Gaia data stream. This is ultimately performed by point spread function (PSF) fitting, which in turn requi…
View article: Gaia Early Data Release 3: Modelling and calibration of Gaia's point and line spread functions
Gaia Early Data Release 3: Modelling and calibration of Gaia's point and line spread functions Open
Context: The unprecedented astrometric precision of the Gaia mission relies on accurate estimates of the locations of sources in the Gaia data stream. This is ultimately performed by point spread function (PSF) fitting, which in turn requi…
View article: Gaia Early Data Release 3: Photometric content and validation
Gaia Early Data Release 3: Photometric content and validation Open
Gaia Early Data Release 3 contains astrometry and photometry results for about 1.8 billion sources based on observations collected by the ESA Gaia satellite during the first 34 months of operations. This paper focuses on the photometric co…
View article: <i>Gaia</i>Early Data Release 3
<i>Gaia</i>Early Data Release 3 Open
Context. Gaia Early Data Release 3 ( Gaia EDR3) contains astrometry and photometry results for about 1.8 billion sources based on observations collected by the European Space Agency Gaia satellite during the first 34 months of its operatio…
View article: Large-amplitude variables in Gaia Data Release 2. Multi-band variability characterization
Large-amplitude variables in Gaia Data Release 2. Multi-band variability characterization Open
The second data release (DR2) of Gaia provides mean photometry in three bands for $\sim$1.4 billion sources, but light curves and variability properties are available for only $\sim$0.5 million of them. Here, we provide a census of large-a…
View article: <i>Gaia</i> Data Release 2
<i>Gaia</i> Data Release 2 Open
\n Contains fulltext :\n 219285.pdf (Publisher’s version ) (Open Access)\n
View article: Electromagnetic counterparts to gravitational wave events from <i>Gaia</i>
Electromagnetic counterparts to gravitational wave events from <i>Gaia</i> Open
The recent discoveries of gravitational wave events and in one case also its electromagnetic (EM) counterpart allow us to study the Universe in a novel way. The increased sensitivity of the LIGO and Virgo detectors has opened the possibili…
View article: OUP accepted manuscript
OUP accepted manuscript Open
\n Contains fulltext :\n 219281.pdf (Publisher’s version ) (Open Access)\n
View article: Gaia Data Release 2: Mapping the Milky Way disc kinematics
Gaia Data Release 2: Mapping the Milky Way disc kinematics Open
Context. The second Gaia data release (Gaia DR2) contains high-precision positions, parallaxes, and proper motions for 1.3 billion sources as well as line-of-sight velocities for 7.2 million stars brighter than GRVS=12 mag. Both samples pr…
View article: Gaia Data Release 2 Specific characterisation and validation of all-sky Cepheids and RR Lyrae stars
Gaia Data Release 2 Specific characterisation and validation of all-sky Cepheids and RR Lyrae stars Open
Context. The Gaia second Data Release (DR2) presents a first mapping of full-sky RR Lyrae stars and Cepheids observed by the spacecraft during the initial 22 months of science operations.