Results 21 to 30 of about 241,854 (224)

The Effects of Multiple Companions on the Efficiency of the SIM Planet Searches [PDF]

, 2005
The Space Interferometry Mission (SIM) is expected to make precise astrometric measurements that can be used to detect low mass planets around nearby stars.
Ford, Eric B.
core   +3 more sources

Weighing the Darkness. III. How Gaia Could, but Probably Will Not, Astrometrically Detect Free-floating Black Holes [PDF]

The Astrophysical Journal, 2023
The gravitational pull of an unseen companion to a luminous star is well known to cause deviations to the parallax and proper motion of a star. In a previous paper in this series, we argue that the astrometric mission Gaia can identify long-period ...
Jeff J. Andrews
doaj   +2 more sources

USNO Bright Star Catalog, version 1 [PDF]

, 2022
USNO Bright Star Catalog (UBSC) is a new astrometric catalog of 1423 brightest stars covering the entire sky, which is published online. It is nearly complete to $V=3$ mag except for three stellar systems. A combined astrometric solution of the Hipparcos
Finch, Charles T., Harris, Hugh C., Makarov, Valeri V., Munn, Jeffrey A., Subasavage, John P., Zacharias, Norbert   +5 more
core   +2 more sources

Unconstrained Astrometric Orbits for Hipparcos Stars with Stochastic Solutions [PDF]

, 2006
A considerable number of astrometric binaries whose positions on the sky do not obey the standard model of mean position, parallax and linear proper motion, were observed by the Hipparcos satellite.
A. Goldin, Falin J.-L., Halbwachs J.-L., V. V. Makarov   +3 more
core   +4 more sources

Astrometric orbits of SB9 stars [PDF]

, 2005
Hipparcos Intermediate Astrometric Data (IAD) have been used to derive astrometric orbital elements for spectroscopic binaries from the newly released Ninth Catalogue of Spectroscopic Binary Orbits (SB9).
A. Jorissen, Abt, Abt, Abt, Aikman, Barker, Batten, Beavers, Bertiau, Bopp, Bretz, Böhm-Vitense, C. Babusiaux, Carney, Chabrier, Christie, Crawford, D. Pourbaix, Duquennoy, Duquennoy, Eichhorn, Fekel, Franklin, Ginestet, Ginestet, Griffin, Griffin, Griffin, Griffin, Griffin, Griffin, Griffin, Griffin, Griffin, Griffin, Griffin, Griffin, Griffin, Griffin, Griffin, Griffin, Griffin, Griffin, Griffin, Grobben, Jackson, Jones, Keenan, Latham, Latham, Lehmann, Lindegren, Luck, Lucy, Luyten, McClure, McClure, Nidever, Pan, Parsons, Plummer, Pourbaix, Pourbaix, Pourbaix, Pourbaix, Pourbaix, Radford, Reimers, Ryabchikova, S. Jancart, Scarfe, Scarfe, Scarfe, Scargle, Spencer Jones, Taylor, Tokovinin, van Leeuwen, Wilson, Wolff, Wright, Wright, Young   +82 more
core   +2 more sources

Astrometric confirmation of young low-mass binaries and multiple systems in the Chamaeleon star-forming regions [PDF]

Astronomy & Astrophysics, 2012
33 pages, 22 figures, accepted for publication in A&A, 2nd version: typos and measurement unit added in Table ...
Andreas Seifahrt, Andreas Seifahrt, A. Bedalov, T. O. B. Schmidt, Markus Mugrauer, Nikolaus Vogt, Nikolaus Vogt, T. Roell, Ralph Neuhäuser   +8 more
openaire   +5 more sources

Seismic inference of 57 stars using full-length Kepler data sets [PDF]

EPJ Web of Conferences, 2017
We present stellar properties of 57 stars from a seismic inference using full-length data sets from Kepler (mass, age, radius, distances). These stars comprise active stars, planet-hosts, solar-analogs, and binary systems.
Creevey Orlagh, Metcalfe Travis S., Salabert David, Mathur Savita, Schultheis Mathias, García Rafael A., Thévenin Frédéric, Bazot Michaël, Xu Haiying   +8 more
doaj   +3 more sources

Interstellar medium, young stars, and astrometric binaries in Galactic archaeology spectroscopic surveys

, 2015
To appear in the conference proceedings: Multi-Object Spectroscopy in the Next Decade: Big Questions, Large Surveys and Wide Fields, Santa Cruz de La Palma, March 2-6 2015.
T. Zwitter, Janez Kos, M. Žerjal, G. Traven   +3 more
  +6 more sources

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, Minia Manteiga, Carlos Dafonte, Arturo Manchado, Ana Ulla   +4 more
doaj   +2 more sources

Astrometric study of 4 binary stars.

The Astronomical Journal, 1972
Completion of long-term astrometric plate series yields revised results on the orbits and parallaxes. The subdwarf 'i Cassiopeiae seems to be overluminous; the distance of the supergiant 6 Aurigae is near 600 pc. The unresolved companion in the red dwarf pair BD +6°398 is of very low mass, and the companion of BD +67°552 massive but probably ...
W. D. Heintz
openalex   +3 more sources