Results 31 to 40 of about 30,911 (193)
Halometry from astrometry [PDF]
Journal of Cosmology and Astroparticle Physics, 2018 Halometry---mapping out the spectrum, location, and kinematics of nonluminous structures inside the Galactic halo---can be realized via variable weak gravitational lensing of the apparent motions of stars and other luminous background sources. Modern astrometric surveys provide unprecedented positional precision along with a leap in the number of ...
Van Tilburg, Ken +2 more
openaire +2 more sources
GIER: A Danish computer from 1961 with a role in the modern revolution of astronomy
, 2017 A Danish computer, GIER, from 1961 played a vital role in the development of a new method for astrometric measurement. This method, photon counting astrometry, ultimately led to two satellites with a significant role in the modern revolution of astronomy.
Høg, Erik
core +1 more source
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
core +2 more sources
Milky Way Star Clusters and Gaia: A Review of the Ongoing Revolution
Universe, 2022 The unprecedented quality of the astrometric measurements obtained with the ESA Gaia spacecraft have initiated a revolution in Milky Way astronomy. Studies of star clusters in particular have been transformed by the precise proper motions and parallaxes ...
Tristan Cantat-Gaudin
doaj +1 more source
Mining of the Milky Way Star Archive Gaia-DR2. Searching for Binary Stars in Planetary Nebulae
Proceedings, 2020 The aim of this work is to search for binary stars associated to planetary nebulae (ionized stellar envelopes in expansion), by mining the astronomical archive of Gaia DR2, that is composed by around 1.7 billion stellar sources.
Iker González-Santamaría +4 more
doaj +1 more source
Corrections to the Hipparcos proper motions in declination for 807 stars [PDF]
Serbian Astronomical Journal, 2008 We used the data on latitude variations obtained from observations with 10 classical photographic zenith tubes (PZT) in order to improve the Hipparcos proper motions in declinations µδ for 807 stars.
Damljanović G., Pejović N.
doaj +1 more source
Software and Techniques for VLBI Data Processing and Analysis
Universe, 2022 Very-long-baseline interferometry (VLBI) is a challenging observational technique, which requires in-depth knowledge about radio telescope instrumentation, interferometry, and the handling of noisy data.
Michael Janssen +2 more
doaj +1 more source
The Structure and Dynamics of Molecular Gas in Planet-forming Zones: A CRIRES Spectro-astrometric Survey [PDF]
, 2011 We present a spectro-astrometric survey of molecular gas in the inner regions of 16 protoplanetary disks using CRIRES, the high-resolution infrared imaging spectrometer on the Very Large Telescope.
Blake, Geoffrey A. +2 more
core +1 more source
COMMISSION 8: ASTROMETRY [PDF]
Proceedings of the International Astronomical Union, 2011 Gaia is continuing well with its development and construction and is expected to achieve parallax accuracies of about 10 to 300 μas for 6 to 20 mag. It is scheduled to launch in 2013. The ICRF2 was adopted by the IAU in 2009 as the new fundamental celestial reference frame.
Evans, Dafydd W. +9 more
openaire +2 more sources
Exploring the Interior Structure of (16) Psyche Through Basin‐Scale Collisions
Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.Abstract Asteroid (16) Psyche, the largest member of the M/X‐type asteroids, may be the leftover core of a differentiated planetesimal. As such (16) Psyche will be explored in detail by NASA's discovery‐class Psyche mission in 2029. This will be the first mission to orbit a metal‐rich asteroid, or any asteroid in the 100–500 km size range.
Namya Baijal +7 more
wiley +1 more source