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Context. Gaia is an ESA cornerstone mission launched on 19 December 2013 aiming to obtain the most complete and precise 3D map of our Galaxy by observing more than one billion sources. This paper is part of a series of documents explaining…

Astrometry from Gaia DR3 has produced a sample of $\sim$170,000 Keplerian orbital solutions, with many more anticipated in the next few years. These data have enormous potential to constrain the population of binary stars, giant planets,…

Solar and Stellar Astrophysics · Physics 2024-11-05 Kareem El-Badry , Casey Lam , Berry Holl , Jean-Louis Halbwachs , Hans-Walter Rix , Tsevi Mazeh , Sahar Shahaf

We provide a homogeneous library of high-resolution, high-S/N spectra for 48 bright AFGKM stars, some of them approaching the quality of solar-flux spectra. Our sample includes the northern Gaia benchmark stars, some solar analogs, and some…

Solar and Stellar Astrophysics · Physics 2018-04-25 K. G. Strassmeier , I. Ilyin , M. Weber

On the basis of recently computed nonlinear convective pulsation models of Galactic Cepheids, spanning wide ranges of input stellar parameters, we derive theoretical mass-dependent Period-Wesenheit relations in the Gaia bands, namely $G$,…

Solar and Stellar Astrophysics · Physics 2020-07-29 Marcella Marconi , Giulia De Somma , Vincenzo Ripepi , Roberto Molinaro , Ilaria Musella , Silvio Leccia , Maria Ida Moretti

The Gaia satellite was selected as a cornerstone mission of the European Space Agency (ESA) in October 2000 and confirmed in 2002 with a current target launch date of 2011. The Gaia mission will gather on the same observational principles…

Astrophysics · Physics 2007-05-23 L. Eyer , F. Mignard

We report on a comparison of spectroscopic analyses for hydrogen (DA) and helium atmosphere (DB) white dwarfs with Gaia Data Release 2 (DR2) parallaxes and photometry. We assume a reddening law and a mass-radius relation to connect the…

Solar and Stellar Astrophysics · Physics 2018-11-28 P. -E. Tremblay , E. Cukanovaite , N. P. Gentile Fusillo , T. Cunningham , M. Hollands

Debris disks are created and sculpted by planetary bodies in the orbital space they share. The properties of these disks, including mass, orbital extent, and morphology, can be indicators of their planetary shepherds. Recently, T. Pearce…

Earth and Planetary Astrophysics · Physics 2026-04-09 Elisabeth M. Penderghast , Benjamin C. Bromley , Scott J. Kenyon , Joan R. Najita

We combine Gaia Data Release 3 and artificial intelligence to enhance the current statistics of substellar companions, particularly within regions of the orbital period vs. mass parameter space that remain poorly constrained by the radial…

Earth and Planetary Astrophysics · Physics 2026-02-04 A. Abreu , J. Lillo-Box , A. M. Perez-Garcia , J. Sahlmann , J. H. J. de Bruijne , C. Cifuentes

Large, deep surveys must typically rely on multiband photometry rather than spectroscopy for determining the astrophysical properties (APs) of stars. Yet designing an optimal photometric system for a wide range of objects is complex,…

Astrophysics · Physics 2007-05-23 C. A. L. Bailer-Jones

We present a catalogue of white dwarf candidates selected from the second data release of $Gaia$ (DR2). We used a sample of spectroscopically confirmed white dwarfs from the Sloan Digital Sky Survey (SDSS) to map the entire space spanned by…

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. The Specific Object Study (SOS) pipeline, developed to…

Gaia Data Release 3 (Gaia DR3) contains the second release of the combined radial velocities. It is based on the spectra collected during the first 34 months of the nominal mission. The longer time baseline and the improvements of the…

We present a new processing of XP spectra for 220 million stars released in Gaia DR3. The new data model is capable of handling objects with Teff between 2000 and 50,000 K, and with log g between 0 and 10, including objects of multitude of…

Solar and Stellar Astrophysics · Physics 2025-03-06 Dylan Huson , Indiana Cowan , Logan Sizemore , Marina Kounkel , Brian Hutchinson

The Gaia Data Release 2 provides precise astrometry for nearly 1.5 billion sources across the entire sky, including several thousand asteroids. In this work, we provide evidence that reasonably large asteroids (diameter $>$ 20 km) have high…

Gaia Data Release 3 (DR3) contains the first release of magnitudes estimated from the integration of Radial Velocity Spectrometer (RVS) spectra for a sample of about 32.2 million stars brighter than G_RVS~14 mag (or G~15 mag). In this…

Nearby galaxies provide populations of stellar and non-stellar sources at a common distance and in quantifiable environments. All are observed through the Milky Way foreground, with varying degrees of contamination that depend on observed…

Astrophysics of Galaxies · Physics 2024-09-05 P. Barmby

Context. When low and intermediate-mass stars leave the Asymptotic Giant Branch (AGB) phase, and before they reach the Planetary Nebulae stage, they enter a very brief and rather puzzling stellar evolutionary stage named post-AGB. Aims. To…

Solar and Stellar Astrophysics · Physics 2024-08-28 Iker González-Santamaría , Minia Manteiga , Arturo Manchado , Eva Villaver , Ana Ulla , Carlos Dafonte

Masses and radii of stars can be derived by combining eclipsing binary light curves with spectroscopic orbits. In our previous work, we modeled the All-Sky Automated Survey for Supernovae (ASAS-SN) light curves of more than 30,000 detached…

Solar and Stellar Astrophysics · Physics 2023-06-07 D. M. Rowan , T. Jayasinghe , K. Z. Stanek , C. S. Kochanek , Todd A. Thompson , B. J. Shappee , W. Giles

The GAIA Galactic survey satellite will obtain photometry in 15 filters of over 10^9 stars in our Galaxy across a very wide range of stellar types. No other planned survey will provide so much photometric information on so many stars. I…

Astrophysics · Physics 2009-11-07 C. A. L. Bailer-Jones