Results 1 to 10 of about 210,825 (223)

The Gaia mission [PDF]

open access: yesAstronomy and Astrophysics, 2016
Gaia is a cornerstone mission in the science programme of the European Space Agency (ESA). The spacecraft construction was approved in 2006, following a study in which the original interferometric concept was changed to a direct-imaging approach. Both the spacecraft and the payload were built by European industry.
T. Prusti   +499 more
arxiv   +25 more sources

Gaia [PDF]

open access: yesAstronomische Nachrichten, 2015
A review of the Gaia mission and its science performance after one year of operations will be presented, and the contribution to reconstructing the history of the Milky Way will be outlined.Comment: 6 pages, 4 figures.
Bailer-Jones   +11 more
core   +6 more sources

Improving Distances to Binary Millisecond Pulsars with Gaia [PDF]

open access: yesThe Astrophysical Journal, 2023
Pulsar distances are notoriously difficult to measure, and play an important role in many fundamental physics experiments, such as pulsar timing arrays.
Abigail Moran   +4 more
doaj   +2 more sources

The Tycho-Gaia astrometric solution. How to get 2.5 million parallaxes with less than one year of Gaia data [PDF]

open access: yesA&A 574, A115 (2015), 2014
Context. The first release of astrometric data from Gaia will contain the mean stellar positions and magnitudes from the first year of observations, and proper motions from the combination of Gaia data with Hipparcos prior information (HTPM). Aims. We study the potential of using the positions from the Tycho-2 Catalogue as additional information for ...
Hobbs, David   +2 more
arxiv   +3 more sources

Selecting a Photometric System for Gaia: C, N, O and Alpha-Process Elements [PDF]

open access: hybridOpen Astronomy, 2003
The sensitivity of stellar spectra to C, N, O and α-process element abundances is discussed with the aim of taking this effect into account when selecting a photometric system for the Gaia orbiting observatory.
Tautvaišienė G.   +2 more
doaj   +2 more sources

Double stars and astrometric uncertainties in Gaia DR1 [PDF]

open access: yes, 2017
A significant number of double stars with separations up to 2.5 arcsec are present in the Gaia Data Release 1 astrometric catalogs. Limiting our analysis to a well-studied sample of 1124 doubles resolved by Hipparcos, provided with individual Tycho component photometry, and cross-matched with the TGAS catalog, we estimate a rate of at least 3% for ...
Fabricius, Claus   +2 more
arxiv   +3 more sources

A compilation of known QSOs for the Gaia mission [PDF]

open access: yes, 2018
Quasars are essential for astrometric in the sense that they are spatial stationary because of their large distance from the Sun. The European Space Agency (ESA) space astrometric satellite Gaia is scanning the whole sky with unprecedented accuracy up to a few muas level. However, Gaia's two fields of view observations strategy may introduce a parallax
Cao, Zi-huang   +3 more
arxiv   +3 more sources

Gaia archive [PDF]

open access: yes, 2016
The Gaia archive is being designed and implemented by the DPAC Consortium. The purpose of the archive is to maximize the scientific exploitation of the Gaia data by the astronomical community.
Brown, Anthony G. A., Hypki, Arkadiusz
core   +5 more sources

Gaia and the Mediterranean Sea [PDF]

open access: yesScientia Marina, 2001
The Earth is a self-organizing system liking a living organism. Lovelock proposed Gaia as a metaphor to designate the check and balance ofterrestrial temperatures: the Earth is never too hot so that the ocean could boil, and the Earth is never too cold ...
Kenneth J. Hsü
doaj   +4 more sources

The Hipparcos–Gaia Catalog of Accelerations: Gaia EDR3 Edition [PDF]

open access: yesThe Astrophysical Journal Supplement Series, 2021
We present a cross-calibration of Hipparcos and Gaia EDR3 intended to identify astrometrically accelerating stars and to fit orbits to stars with faint, massive companions.
Timothy D. Brandt
semanticscholar   +5 more sources

Home - About - Disclaimer - Privacy