Zobrazeno 1 - 10
of 22 573
pro vyhledávání: '"PARALLAXES"'
Borrowed from optics, the concept of parallax identifies the apparently relative position of objects according to the lines of sight determined by the viewer's standpoint. This concept proves particularly useful in opening new insights into the work
Autor:
Anne Raulin, Susan Carol Rogers
Anthropological inquiry developed around the study of the exotic. Now that we live in a world that seems increasingly familiar, putatively marked by a spreading sameness, anthropology must re-envision itself. The emergence of diverse national traditi
We present astrometric results from a Hubble Space Telescope (HST) campaign aimed at determining precise distances for cold Y-type brown dwarfs. Combining observations from a dedicated HST/WFC3 program with archival data, we derive astrometric soluti
Externí odkaz:
http://arxiv.org/abs/2412.16679
A recent investigation highlighted peculiar trends between the radii derived from surface brightness-colour relations (SBCRs) combined with Gaia DR3 parallaxes with respect to asteroseismic scaling relation radii from K2 data. [...] We investigated o
Externí odkaz:
http://arxiv.org/abs/2412.11606
We compared stellar radii derived from asteroseismic scaling relations with those estimated using two independent surface brightness-colour relations (SBCRs) and Gaia DR3 parallaxes. We cross-matched asteroseismic and astrometric data for over 6,400
Externí odkaz:
http://arxiv.org/abs/2409.10050
Autor:
Scholz, Ralf-Dieter
Publikováno v:
A&A 685, A162 (2024)
Hypervelocity stars (HVSs) unbound to the Galaxy can be formed with extreme stellar interactions. Observational evidence comes from measurements of radial velocities (RVs) of objects crossing the Galactic halo and of tangential velocities based on hi
Externí odkaz:
http://arxiv.org/abs/2402.10714
Autor:
Bailer-Jones, C. A. L.
The accuracy of stellar distances inferred purely from parallaxes degrades rapidly with distance. Proper motion measurements, when combined with some idea of typical velocities, provide independent information on stellar distances. Here I build a dir
Externí odkaz:
http://arxiv.org/abs/2311.00374
We have developed a method to determine the most reliable distances for a large group of planetary nebulae. For this purpose, we analyze the distances obtained from \textit{Gaia} parallaxes and three determinations of statistical distances. The most
Externí odkaz:
http://arxiv.org/abs/2403.04606