M. Crosta
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View article: Pattern functions of the Astrometric Gravitational Wave Antenna
Pattern functions of the Astrometric Gravitational Wave Antenna Open
Since the first detection of gravitational waves (GWs), the field of experimental gravitation is steadily working on improving the current detectors as well as developing new instruments in order to expand the range of observable frequenci…
View article: Exploring Milky Way rotation curves with Gaia DR3: a comparison between ΛCDM, MOND, and general relativistic approaches
Exploring Milky Way rotation curves with Gaia DR3: a comparison between ΛCDM, MOND, and general relativistic approaches Open
With the release of Gaia DR3, we extend the comparison between dynamical models for the Milky Way rotation curve initiated in the previous work. Utilising astrometric and spectro-photometric data for 719143 young disc stars within | z | < …
View article: Constraints on Testing Post-Newtonian Gravity with Scanning Space Astrometry
Constraints on Testing Post-Newtonian Gravity with Scanning Space Astrometry Open
High-precision astrometry has the capability of testing General Relativity in the framework of the parametrized post-Newtonian formalism (PPN). Accurate measurements of gravitational light deflection over the entire celestial sphere open u…
View article: Exploring Milky Way rotation curves with Gaia DR3: a comparison between $Λ$CDM, MOND, and General Relativistic approaches
Exploring Milky Way rotation curves with Gaia DR3: a comparison between $Λ$CDM, MOND, and General Relativistic approaches Open
With the release of Gaia DR3, we extend the comparison between dynamical models for the Milky Way rotation curve initiated in the previous work. Utilising astrometric and spectro-photometric data for 719143 young disc stars within $|z|<1$ …
View article: Geometry-driven and dark-matter-sustained Milky Way rotation curves with <i>Gaia</i> DR3
Geometry-driven and dark-matter-sustained Milky Way rotation curves with <i>Gaia</i> DR3 Open
Thanks to Gaia DR2, we proved for the first time that a general relativistic Milky Way rotation curve is statistically indistinguishable from its state-of-the-art dark matter analogue. Those results supported the ansatz that gravitational …
View article: A new kinematic model of the Galaxy: analysis of the stellar velocity field from <i>Gaia</i> Data Release 3
A new kinematic model of the Galaxy: analysis of the stellar velocity field from <i>Gaia</i> Data Release 3 Open
This work presents the results of a kinematic analysis of the Galaxy that uses a new model as applied to the newest available Gaia data. We carry out the Taylor decomposition of the velocity field up to second order for 18 million high lum…
View article: A new kinematic model of the Galaxy: analysis of the stellar velocity field from Gaia Data Release 3
A new kinematic model of the Galaxy: analysis of the stellar velocity field from Gaia Data Release 3 Open
This work presents the results of a kinematic analysis of the Galaxy that uses a new model as applied to the newest available Gaia data. We carry out the Taylor decomposition of the velocity field up to second order for 18 million high lum…
View article: THE DATE OF FOUNDATION OF AUGUSTA TAURINORUM (TORINO) BY CROSS-CHECKING ASTRONOMY, ARCHAEOLOGY AND GROMATICS
THE DATE OF FOUNDATION OF AUGUSTA TAURINORUM (TORINO) BY CROSS-CHECKING ASTRONOMY, ARCHAEOLOGY AND GROMATICS Open
The paper dates the foundation of the city Augusta Turinorum (Turin) by applying an interdisciplinary and cross-checking method that relies on astronomy, archaeology and philology. The foundation procedure em-ployed in the Hellenistic/Roma…
View article: Differential astrometry with <i>Gaia</i>
Differential astrometry with <i>Gaia</i> Open
Aims. In this paper, we develop a differential astrometric framework that is appropriate for a scanning space satellite such as Gaia. We apply it to the first of the GAREQ fields – the Gaia Relativistic Experiment on Jupiter’s quadrupole –…
View article: Post-Newtonian gravity and <i>Gaia</i>-like astrometry
Post-Newtonian gravity and <i>Gaia</i>-like astrometry Open
Context. Relativistic models of light propagation adopted for high-precision astrometry are based on the parametrised post-Newtonian formalism, which provides a framework for examining the effects of a hypothetical violation of general rel…
View article: On the principle of Astrometric Gravitational Wave Antenna
On the principle of Astrometric Gravitational Wave Antenna Open
The direct detection of gravitational waves by ground-based optical interferometers has opened a new window in astronomy. Nevertheless, as these detectors are a combination of two Michelson-Morley like baselines, their sensitivity for dete…
View article: Astrometric Precision Tests on TESS Data
Astrometric Precision Tests on TESS Data Open
Astrometry at or below the microarcsec level with an imaging telescope assumes that the uncertainty on the location of an unresolved source can be an arbitrarily small fraction of the detector pixel, given a sufficient photon budget. This …
View article: Theia: Faint objects in motion or the new astrometry frontier
Theia: Faint objects in motion or the new astrometry frontier Open
In the context of the ESA M5 (medium mission) call we proposed a new satellite mission, Theia, based on relative astrometry and extreme precision to study the motion of very faint objects in the Universe. Theia is primarily designed to stu…
View article: Gaia Early Data Release 3: The astrometric solution
Gaia Early Data Release 3: The astrometric solution Open
Gaia Early Data Release 3 (Gaia EDR3) contains results for 1.812 billion sources in the magnitude range G = 3 to 21 based on observations collected by the European Space Agency Gaia satellite during the first 34 months of its operational p…
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 results for 1.812 billion sources in the magnitude range G = 3–21 based on observations collected by the European Space Agency Gaia satellite during the first 34 months of its operat…
View article: On testing CDM and geometry-driven Milky Way rotation curve models with Gaia DR2
On testing CDM and geometry-driven Milky Way rotation curve models with Gaia DR2 Open
Flat rotation curves (RCs) in disc galaxies provide the main observational support to the hypothesis of surrounding dark matter (DM). Despite of the difficulty in identifying the DM contribution to the total mass density in our Galaxy, ste…
View article: Shedding light on the Milky Way rotation curve with Gaia DR2
Shedding light on the Milky Way rotation curve with Gaia DR2 Open
We present the first attempt to apply the relativistic kinematics delivered by Gaia to trace the Milky Way (MW) rotation curves within a general relativistic scenario. In particular; we have tested an axially symmetric, stationary and asym…
View article: Dating the foundation of Augusta Taurinorum ex sole. The augustean propaganda and the role of Astronomy
Dating the foundation of Augusta Taurinorum ex sole. The augustean propaganda and the role of Astronomy Open
The essay presents the results of a joint study of astronomy and archeology that has allowed to define the foundation date of the city of Turin as a Roman colony, called Iulia Augusta Taurinorum. This multidisciplinary research represents …
View article: Parallaxes of Southern Extremely Cool objects III: 118 L and T dwarfs
Parallaxes of Southern Extremely Cool objects III: 118 L and T dwarfs Open
We present new results from the Parallaxes of Southern Extremely Cool dwarfs program to measure parallaxes, proper motions and multiepoch photometry of L and early T dwarfs. The observations were made on 108 nights over the course of 8 yr …
View article: Gaia Data Release 2: The astrometric solution
Gaia Data Release 2: The astrometric solution Open
Gaia Data Release 2 (Gaia DR2) contains results for 1693 million sources in the magnitude range 3 to 21 based on observations collected by the European Space Agency Gaia satellite during the first 22 months of its operational phase. We des…
View article: <i>Gaia</i> Data Release 2
<i>Gaia</i> Data Release 2 Open
Context. Gaia Data Release 2 ( Gaia DR2) contains results for 1693 million sources in the magnitude range 3 to 21 based on observations collected by the European Space Agency Gaia satellite during the first 22 months of its operational pha…
View article: Application of time transfer functions to Gaia's global astrometry. Validation on DPAC simulated Gaia-like observations
Application of time transfer functions to Gaia's global astrometry. Validation on DPAC simulated Gaia-like observations Open
A key objective of the ESA Gaia satellite is the realization of a quasi-inertial reference frame at visual wavelengths by means of global astrometric techniques. This requires an accurate mathematical and numerical modeling of relativistic…
View article: The astronomical garden of Venus and Mars-NG915: the pivotal role of Astronomy in dating and deciphering Botticelli's masterpiece
The astronomical garden of Venus and Mars-NG915: the pivotal role of Astronomy in dating and deciphering Botticelli's masterpiece Open
This essay demonstrates the key role of Astronomy in Botticelli's "Venus and Mars-NG915" painting, to date only very partially understood. Worthwhile coincidences among the principles of the Ficinian philosophy, the historical characters i…