Results 1 to 10 of about 38,299 (194)
Micro-Arcsecond Radio Astrometry [PDF]
Annual Review of Astronomy and Astrophysics, 2013 Astrometry provides the foundation for astrophysics. Accurate positions are required for the association of sources detected at different times or wavelengths, and distances are essential to estimate the size, luminosity, mass, and ages of most objects ...
Honma, M., Reid, M. J.
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Flowdown of the TMT astrometry error budget(s) to the IRIS design [PDF]
, 2016 TMT has defined the accuracy to be achieved for both absolute and differential astrometry in its top-level requirements documents. Because of the complexities of different types of astrometric observations, these requirements cannot be used to specify ...
Andersen, David +11 more
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A focus on L dwarfs with trigonometric parallaxes [PDF]
, 2018 This is an author-created, un-copyedited version of an article published in Publications of the Astronomical Society of the Pacific. Under embargo until 14 May 2019. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the
A. Burgasser +46 more
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Emission-line stars in the LMC: the Armagh survey, and a metacatalogue [PDF]
, 2013 [Aims] Accurate astrometry is required to reliably cross-match 20th-century photographic catalogues against 21st-century digital surveys. The present work provides modern-era identifications and astrometry for the 801 emission-line objects "of stellar ...
Howarth, Ian D.
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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.
A Eckart +6 more
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The History of Astrometry [PDF]
, 2012 The history of astrometry, the branch of astronomy dealing with the positions of celestial objects, is a lengthy and complex chronicle, having its origins in the earliest records of astronomical observations more than two thousand years ago, and ...
Perryman, Michael
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24. Photographic Astrometry (Astrometrie Photographioue) [PDF]
Transactions of the International Astronomical Union, 1991 Despite some much publicized disappointments, the highlights of Astrometry during the past three year period are dominated by the successful launches of the ES A Hipparcos astrometric satellite and the NASA Hubble Space Telescope. For the past 15 to 20 years the research activities of many Commission members have been monopolized by the design and ...
openaire +1 more source
Orbital Parameter Determination for Wide Stellar Binary Systems in the Age of Gaia
, 2020 The orbits of binary stars and planets, particularly eccentricities and inclinations, encode the angular momentum within these systems. Within stellar multiple systems, the magnitude and (mis)alignment of angular momentum vectors among stars, disks, and ...
Dupuy, Trent J. +6 more
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Commission 8: Astrometry [PDF]
Proceedings of the International Astronomical Union, 2005 AbstractThis triennial report from Commission 8 covers astrometry-related matters for objects ranging from Solar system bodies out to Milky Way stars and QSOs at cosmological distances. This enormous range of distances is needed to establish, maintain, and improve the metric of the visible Universe--a very challenging effort since everything is moving.
Platais, Imants +9 more
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The Ray Tracing Analytical Solution within the RAMOD framework. The case of a Gaia-like observer [PDF]
, 2015 This paper presents the analytical solution of the inverse ray tracing problem for photons emitted by a star and collected by an observer located in the gravitational field of the Solar System.
Crosta, Mariateresa +3 more
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