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The Future of Astrometry in Space [PDF]
Frontiers in Astronomy and Space Sciences, 2018 This contribution focuses on the importance of astrometry and on its future developments. Over the centuries astrometry has greatly contributed to the advance of the knowledge of the Universe.
Antonella Vallenari
exaly +8 more sources
Precise radio astrometry and new developments for the next generation of instruments [PDF]
Astronomy and Astrophysics Review, 2020 We present a technique-led review of the progression of precise radio astrometry, from the first demonstrations, half a century ago, until to date and into the future. We cover the developments that have been fundamental to allow high accuracy and precision astrometry to be regularly achieved. We review the opportunities provided by the next-generation
María J Rioja, Richard Dodson
exaly +3 more sources
Astrometry of circumstellar masers [PDF]
, 2002 The circumstellar masers around evolved stars offer an interesting possibility to measure stellar parameters through VLBI astrometry. In this paper the application of this technique is discussed, including the accuracy and the uncertainties of the method.
Wouter Vlemmings, H. J. van Langevelde
arxiv +7 more sources
ELSA and the frontiers of astrometry [PDF]
EAS Publications Series, 2010 ELSA stands for the ambitious goal of `European Leadership in Space Astrometry'. In this closing contribution I will examine how the ELSA network has advanced this goal. I also look ahead to the time when the Gaia data will be published and consider what needs to be done to maintain European leadership.
Brown, Anthony G. A.
arxiv +7 more sources
Masses, bulk densities, and macroporosities of asteroids (15) Eunomia, (29) Amphitrite, (52) Europa, and (445) Edna based on Gaia astrometry [PDF]
A&A 658, A65 (2022), 2021 Gaia Data Release 2 (DR2) includes milliarcsecond-accuracy astrometry for 14,099 asteroids. We explore the practical impact of this data for the purpose of asteroid mass and orbit estimation by estimating the masses individually for four large asteroids. We use various combinations of Gaia astrometry and/or Earth-based astrometry so as to determine the
L. Siltala, M. Granvik
arxiv +3 more sources
Microarcsecond Astrometry: Science Highlights from Gaia [PDF]
Annual Review of Astronomy and Astrophysics, Vol. 59, 2021,
pp:59-115, 2021 Access to microarcsecond astrometry is now routine in the radio, infrared, and optical domains. In particular the publication of the second data release from the Gaia mission made it possible for every astronomer to work with easily accessible, high-precision astrometry for 1.7 billion sources to 21st magnitude over the full sky.
Anthony G. A. Brown
arxiv +3 more sources
Improved astrometry for the Bohannan & Epps catalogue [PDF]
, 2012 Aims: Accurate astrometry is required to reliably cross-match 20th-century catalogues against 21st-century surveys. The present work aims to provide such astrometry for the 625 entries of the Bohannan & Epps (BE74) catalogue of H$\alpha$ emission-line stars.
Howarth, Ian D.
arxiv +3 more sources
The First VERA Astrometry Catalog [PDF]
Publication of the Astronomical Society of Japan, 2020 We present the first astrometry catalog from the Japanese VLBI (very long baseline interferometer) project VERA (VLBI Exploration of Radio Astrometry).
Hiroshi Imai +2 more
exaly +2 more sources
Planetary and Space Science, 2023 PRAIA - Package for the Reduction of Astronomical Images Automatically - is a suite of astrometric and photometric tasks designed to cope with huge amounts of heterogeneous observations with fast processing, no human intervention, minimum parametrization and yet maximum possible accuracy and precision.
arxiv +3 more sources
True Masses of the Long-period Companions to HD 92987 and HD 221420 from Hipparcos–Gaia Astrometry [PDF]
Astronomical Journal, 2021 The extensive time span of modern radial velocity surveys has made the discovery of long-period substellar companions more common in recent years; however, measuring the true masses of these objects remains challenging.
Alexander Venner +2 more
exaly +2 more sources