WorldCat Identities

Brown, Anthony G. A.

Overview
Works: 13 works in 19 publications in 1 language and 93 library holdings
Genres: Conference papers and proceedings 
Roles: Editor, Contributor, htt, Other, Author
Publication Timeline
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Most widely held works by Anthony G. A Brown
Astrometry and astrophysics in the Gaia sky : proceedings of the 330th Symposium of the International Astronomical Union held in Nice, France, April 24-28, 2017 by International Astronomical Union( Book )

4 editions published between 2017 and 2018 in English and held by 53 WorldCat member libraries worldwide

Astrometry has historically been fundamental to all the fields of astronomy, driving many revolutionary scientific results. ESA's Gaia mission is astrometrically, photometrically and spectroscopically surveying the full sky, measuring around a billion stars to magnitude 20, to allow stellar distance and age estimations with unprecedented accuracy. With the complement of radial velocities, it will provide the full kinematic information of these targets, while the photometric and spectroscopic data will be used to classify objects and astrophysically characterize stars. IAU Symposium 330 reviews the first 2.5 years of Gaia activities and discusses the scientific results derived from the first Gaia data release (GDR1). This significant increase in the precision of the astrometric measurements has sharpened our view of the Milky Way and the physical processes involved in stellar and galactic evolution. To many, the Gaia revolution heralds a transformation comparable to the impact of the telescope's invention four centuries ago
GAIA : at the frontiers of astrometry by Centre International d'Études Pédagogiques( )

3 editions published between 2010 and 2021 in English and held by 24 WorldCat member libraries worldwide

The Symposium "Gaia : at the frontiers of astrometry", held in Sèvres (Hauts de Seine, France) from 7 to 11 June 2010, was the closing conference of the European Marie Curie ELSA network (European Leadership in Space Astrometry). Gaia, selected as one of the cornerstones of the European Space Agency (ESA) Science Program in October 2000 and planned for launch in 2012, has been conceived in the wake of the success of the Hipparcos satellite, the first space astrometry mission, launched by ESA in 1989. Combining the power of discovery of a systematic and repeated survey of the sky with three complementary instruments (astrometric, photometric and spectroscopic) and extreme accuracy astrometry, Gaia will provide an unprecedented stereoscopic map of our Galaxy and the nearby universe. The objectives of the Symposium were to present the results obtained in the framework of the ELSA network on the various aspects of the preparation of the data analysis and scientific exploitation of the Gaia mission. The science expected from Gaia has been put in the 2015 context, and progresses on parallel or connected topics have been presented : progress on other astrometric satellites, performance of light detectors in astronomy, processing of massive data sets, especially in astronomy, real-time classification of transients, access to massive data sets, and propects for ground-based observations in complement to astrometry
The merger that led to the formation of the Milky Way's inner stellar halo and thick disk by Amina Helmi( )

1 edition published in 2018 in English and held by 2 WorldCat member libraries worldwide

Gaia Data Release 1 summary of the astrometric, photometric, and survey properties( )

1 edition published in 2016 in English and held by 2 WorldCat member libraries worldwide

High precision astrometry mission for the detection and characterization of nearby habitable planetary systems with the Nearby Earth Astrometric Telescope (NEAT) by Fabien Malbet( )

1 edition published in 2011 in English and held by 2 WorldCat member libraries worldwide

The mass of the young planet Beta Pictoris b through the astrometric motion of its host star by I. A. G Snellen( )

1 edition published in 2018 in English and held by 2 WorldCat member libraries worldwide

Three-dimensional motions in the Sculptor dwarf galaxy as a glimpse of a new era by D Massari( )

1 edition published in 2017 in English and held by 2 WorldCat member libraries worldwide

Gaia Data Release 2 observations of solar system objects by F Spoto( )

1 edition published in 2018 in English and held by 1 WorldCat member library worldwide

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 14,099 SSOs. These asteroids have been already identified and have been numbered by the Minor Planet Center repository. Positions are provided for each Gaia observation at CCD level. As additional information, complementary to astrometry, the apparent brightness of SSOs in the unfiltered G band is also provided for selected observations. Aims: We explain the processing of SSO data, and describe the criteria we used to select the sample published in Gaia DR2. We then explore the data set to assess its quality. Methods: To exploit the main data product for the solar system in Gaia DR2, which is the epoch astrometry of asteroids, it is necessary to take into account the unusual properties of the uncertainty, as the position information is nearly one-dimensional. When this aspect is handled appropriately, an orbit fit can be obtained with post-fit residuals that are overall consistent with the a-priori error model that was used to define individual values of the astrometric uncertainty. The role of both random and systematic errors is described. The distribution of residuals allowed us to identify possible contaminants in the data set (such as stars). Photometry in the G band was compared to computed values from reference asteroid shapes and to the flux registered at the corresponding epochs by the red and blue photometers (RP and BP). Results: The overall astrometric performance is close to the expectations, with an optimal range of brightness G similar to 12 - 17. In this range, the typical transit-level accuracy is well below 1 mas. For fainter asteroids, the growing photon noise deteriorates the performance. Asteroids brighter than G similar to 12 are affected by a lower performance of the processing of their signals. The dramatic improvement brought by Gaia DR2 astrometry of SSOs is demonstrated by comparisons to the archive data and by preliminary tests on the detection of subtle non-gravitational effects
Astrometry and astrophysics in the Gaia sky( Book )

1 edition published in 2018 in English and held by 1 WorldCat member library worldwide

Gaia Data Release 2 summary of the contents and survey properties( )

1 edition published in 2018 in English and held by 1 WorldCat member library worldwide

The Gaia mission: science, organization and present status by L Lindegren( Book )

1 edition published in 2008 in English and held by 1 WorldCat member library worldwide

"The ESA space astrometry mission Gaia will measure the positions, parallaxes and proper motions of the 1 billion brightest stars on the sky. Expected accuracies are in the 7 25 uas range down to 15 mag and sub-mas accuracies at the faint limit (20 mag). The astrometric data are complemented by low-resolution spectrophotometric data in the 330 1000 nm wavelength range and, for the brighter stars, radial velocity measurements. The scientific case covers an extremely wide range of topics in galactic and stellar astrophysics, solar system and exoplanet science, as well as the establishment of a very accurate, dense and faint optical reference frame. With a planned launch around 2012 and an (extended) operational lifetime of 6 years, final results are expected around 2021. We give a brief overview of the science goals of Gaia, the overall project organisation, expected performance, and some key technical features and challenges."
Open clusters and ob associations: a review by Anthony G. A Brown( )

1 edition published in 2001 in English and held by 1 WorldCat member library worldwide

The hyades : distance, structure and dynamics by Anthony G. A Brown( )

2 editions published in 1997 in English and held by 1 WorldCat member library worldwide

 
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Audience level: 0.77 (from 0.70 for Astrometry ... to 0.99 for Astrometry ...)

Astrometry and astrophysics in the Gaia sky : proceedings of the 330th Symposium of the International Astronomical Union held in Nice, France, April 24-28, 2017 Astrometry and astrophysics in the Gaia sky
Covers
GAIA : at the frontiers of astrometryAstrometry and astrophysics in the Gaia sky
Languages
English (19)