Results 61 to 70 of about 4,968 (216)
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
Gaia Search for Stellar Companions of TESS Objects of Interest V
Astronomische Nachrichten, Volume 346, Issue 5, June 2025.ABSTRACT In this paper, we present the latest results of our ongoing multiplicity survey of (Community) TESS Objects of Interest, using astrometry and photometry from the latest data release of the ESA Gaia mission to detect stellar companions of these stars and to characterize their properties.
Markus Mugrauer +3 more
wiley +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
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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.
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Tycho Astrometry and Photometry [PDF]
Symposium - International Astronomical Union, 1986 The HIPPARCOS Star Mappers were designed to determine the satellite attitude by observation of stars with known positions. ESA has now enhanced them so that the continuous photon counts from two photo multipliers with B and V response will be recorded.
openaire +4 more sources
On the Age Distribution of Classical Cepheids in the Galaxy
Astronomische Nachrichten, Volume 346, Issue 5, June 2025.ABSTRACT We revisit the problem of the positive correlation between age and Galactocentric distance seen in Galactic Classical Cepheids, which at first sight may seem counter‐intuitive in the context of inside‐out galaxy formation. To explain it, we use the Besançon Galaxy Model and a simulation of star particles in the Galactic disc coupled with ...
Friedrich Anders +5 more
wiley +1 more source
arXiv: Astrophysics, 2005 General relativistic effects in astrophyiscal systems have been detected thanks to accurate astrometric measurements. We outline some keystones of astrometry such as stellar aberration (argument development during the years 1727-1872); Mercury's perihelion precession (1845-1916); solar disk oblateness (1966-2001); relativistic light deflection (1916 ...
openaire +3 more sources
Journal of Geophysical Research: Space Physics, Volume 130, Issue 5, May 2025.Abstract We analyze five large‐scale tail disturbances in comet C/2022 E3 (ZTF)'s ion tail using images from astrophotographers, tracking specific features within the tail to determine their speeds. We employ a heliosphere model to estimate when the comet crossed the heliospheric current sheet (HCS).
A. Wellbrock, G. H. Jones
wiley +1 more source
Symposium - International Astronomical Union, 1995 CCD transit telescopes are now determining star positions at faint magnitudes (i.e., down to V ∼ 17 mag) and with accuracies as good as ∼ ±150 mas. CCD parallaxes with errors ∼ ±1 mas are now being determined routinely in time periods less than 3 years.
R.C. Stone, C.C. Dahn
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Ecological Solutions and Evidence, Volume 6, Issue 2, April–June 2025.Venn Diagram of fish species captured by seining and electrofishing. The 10 most frequent species captured in the watershed are represented in the overlapping area as well as an outline of the state of Michigan with the Rouge River watershed highlighted. Both sides have a picture of method collection with a darter on the seining side and a trout on the
Olivia F. Williams +7 more
wiley +1 more source