Results 11 to 20 of about 1,046,866 (182)

Binary Star Orbits. VI. The Interferometric-spectroscopic Binary 73 Leo

The Astronomical Journal
Discordances in radial-velocity measurements of 73 Leonis, made more than a century ago, gave rise to the first suggestion that this fifth-magnitude star was a binary system, but it was 40 yr before an accurate investigation of the object commenced, and ...
Brian D. Mason, R. Elizabeth M. Griffin, R. T. Zavala, Christian A. Hummel, Haley M. Hurowitz, Jonathan L. Hurowitz, William I. Hartkopf, Ellyn K. Baines, Stephen J. Williams, Rachel A. Matson   +9 more
doaj   +2 more sources

Absolute Dimensions of the Interferometric Binary HD 174881: A Test of Stellar Evolution Models for Evolved Stars

The Astrophysical Journal
We report high-resolution spectroscopic monitoring and long-baseline interferometric observations with the Palomar Testbed Interferometer (PTI) of the 215 day binary system HD 174881 (K1 II-III), composed of two giant stars.
Guillermo Torres, Andrew F. Boden, John D. Monnier, Gerard T. van Belle   +3 more
doaj   +3 more sources

A Spectroscopic and Interferometric Study of W Serpentis Stars. I. Circumbinary Outflow in the Interacting Binary W Serpentis

The Astrophysical Journal
W Serpentis is an eclipsing binary system and the prototype of the Serpentid class of variable stars. These are interacting binaries experiencing intense mass transfer and mass loss.
Katherine Shepard, Douglas R. Gies, Gail H. Schaefer, Narsireddy Anugu, Fabien R. Baron, Cyprien Lanthermann, John D. Monnier, Stefan Kraus, Theo ten Brummelaar   +8 more
doaj   +3 more sources

Modelling and observations of molecules in discs around young stars [PDF]

, 2013
This thesis contains a study of molecules within circumstellar discs around young stars. Firstly, the chemistry of a disc around a young, Class 0 protostar is modelled.
Ilee, John David
core   +6 more sources

Speckle Interferometry at SOAR in 2022

The Astronomical Journal, 2023
Results of the speckle-interferometry observations at the 4.1 m SOuthern Astrophysical Research Telescope obtained during 2022 are presented: 2508 measurements of 1925 resolved pairs or subsystems and 785 nonresolutions of 611 targets; 26 pairs are ...
Brian D. Mason, Andrei Tokovinin, Rene A. Mendez, Edgardo Costa   +3 more
doaj   +1 more source

Cosmic Explorer: A Next-Generation Ground-Based Gravitational-Wave Observatory

Galaxies, 2022
Cosmic Explorer is a concept for a new laser interferometric observatory in the United States to extend ground-based gravitational-wave astrophysics into the coming decades.
Evan D. Hall 
doaj   +1 more source

Mass Ratio of Single-line Spectroscopic Binaries with Visual Orbits Using Bayesian Inference and Suitable Priors

The Astronomical Journal, 2023
We present orbital elements for 22 single-line binaries, nine of them studied for the first time, determined from a joint spectroscopic and astrometric solution.
Jennifer Anguita-Aguero, Rene A. Mendez, Miguel Videla, Edgardo Costa, Leonardo Vanzi, Nicolas Castro-Morales, Camila Caballero-Valdes   +6 more
doaj   +1 more source

First speckle interferometric measurements of binary stars at the Observatorio Astrofísico Guillermo Haro [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT In this paper, we present the first multiband speckle interferometric measurements of binary stars performed using the 2.1 m telescope of the Observatorio Astrofísico Guillermo Haro, Cananea, Sonora, México. We describe here FICCO: Fast Imaging Camera for Cananea Observatory, a new instrument developed to perform speckle ...
C A Guerrero, F F Rosales-Ortega, G Escobedo, J Martínez, E Castillo, P García-Flores, M A Nieto-Suárez   +6 more
openaire   +1 more source

High Resolution Interferometric Observations of Eclipsing Binary Stars [PDF]

Symposium - International Astronomical Union, 1994
Eclipsing binary stars are of great importance in astronomy. Now, high angular resolution measurements of eclipsing stars with the Mark III Stellar Interferometer (Shao 1988) can determine not only all of the orbital parameters, but also the luminosities and color indices of the two components, and can yield precise information for the study of the ...
Xiaopei Pan, Michael Shao, M. Mark Colavita   +2 more
openaire   +1 more source

Wide binary stars in the Galactic field : a statistical approach [PDF]

, 2010
This thesis focuses on the statistical properties of wide binary (WB) star systems in the Galactic field. With projected separations larger than 200 AU and, consequently, having very low binding energies, WB are sensitive probes of the Galactic ...
Longhitano, Marco
core   +1 more source