Results 41 to 50 of about 51,217 (241)
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 +3 more
core +3 more sources
Astronomy & Astrophysics, 2023 Binary systems constitute a valuable astrophysics tool for testing our understanding of stellar structure and evolution. Systems containing at least one oscillating component are interesting in this regard because asteroseismology offers independent ...
P. G. Beck +25 more
semanticscholar +1 more source
The Astrophysical Journal, 2023 Soon after Gaia Data Release 3 (DR3) in 2022 June, some candidates (and one confirmed) of detached black hole (BH)–luminous companion (LC) binaries have been reported.
Minori Shikauchi +3 more
doaj +1 more source
An astrometric and spectroscopic study of the $\delta$ Scuti variable HD21190 and its wide companion CPD -83$^{\circ}$ 64B [PDF]
, 2017 Although pulsations of $\delta$ Scuti type are not expected among Ap stars from a theoretical point of view, previous observations of the known $\delta$ Scuti star HD21190 indicated a spectral classification F2 III SrEuSi:, making it the most evolved Ap ...
Aliçavuş, F. Kahraman +6 more
core +2 more sources
Differential Astrometry of Sub-arcsecond Scale Binaries at the Palomar Testbed Interferometer [PDF]
, 2003 We have used the Palomar Testbed Interferometer to perform very high precision differential astrometry on the 0.25 arcsecond separation binary star HD 171779.
Lane, B. F., Muterspaugh, M. W.
core +1 more source
Modeling Multi-Wavelength Stellar Astrometry. II. Determining Absolute Inclinations, Gravity Darkening Coefficients, and Spot Parameters of Single Stars with SIM Lite [PDF]
, 2010 We present a novel technique to determine the absolute inclination of single stars using multi-wavelength sub-milliarcsecond astrometry. The technique exploits the effect of gravity darkening, which causes a wavelength-dependent astrometric displacement ...
Aufdenberg +26 more
core +2 more sources
Orbits and masses in the young triple system TWA 5 [PDF]
, 2013 We aim to improve the orbital elements and determine the individual masses of the components in the triple system TWA 5. Five new relative astrometric positions in the H band were recorded with the adaptive optics system at the Very Large Telescope ...
Correia, S. +3 more
core +1 more source
A spectro-astrometric study of southern pre-main sequence stars [PDF]
Astronomy & Astrophysics, 2002 We present spectro-astrometric observations for 28 southern pre-main sequence (PMS) stars and investigate their circumstellar environment down to AU scales. The structures detected in the ``position spectra'' include: (1) almost all the known binary companions in our sample (Sz 68, Sz 41, HO Lup, VW Cha, S CrA, AS 205), (2) companion candidates which ...
Takami, Michihiro +2 more
openaire +3 more sources
The New Version of the Binary Star Database (BDB)
Open Astronomy, 2012 The Binary star database contains data on about 100 000 stellar systems of multiplicity 2 to 22, taken from a large variety of published catalogues for all types of binary stars: visual, orbital, astrometric, interferometric, spectroscopic, photometric ...
Kaygorodov P. +4 more
doaj +1 more source