Results 21 to 30 of about 1,006,206 (194)

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

Visual Binary Stars with Partially Missing Data: Introducing Multiple Imputation in Astrometric Analysis [PDF]

Publications of the Astronomical Society of the Pacific, 2019
Nine figures, six tables, 23 pages including three appendices. Accepted for publication in PASP.
Claveria, Ruben M., Mendez, Rene A., Silva, Jorge F., Orchard, Marcos E.   +3 more
openaire   +2 more sources

A New Catalog of Am-type Chemically Peculiar Stars Based on LAMOST

The Astrophysical Journal Supplement Series, 2023
A total of about 21,600 Am candidates were detected with the MKCLASS code based on the low-resolution spectra of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope Data Releases 8 (v1.0), 9 (v0), and 10 (v0), which greatly expands the database
Xiao-man Tian, Zhi-hua Wang, Li-ying Zhu, Xiao-Ling Yang   +3 more
doaj   +1 more source

EL CVn-type binaries - discovery of 17 helium white dwarf precursors in bright eclipsing binary star systems [PDF]

, 2014
The star 1SWASP J024743.37−251549.2 was recently discovered to be a binary star in which an A-type dwarf star eclipses the remnant of a disrupted red giant star (WASP 0247−25 B).
Southworth, J., West, Richard G., Pulley, D., Simpson, E.K., Hadigal, S., Wheatley, P.J., West, R.G., Owen, C., Heber, U., Wheatley, Peter J., Bochinski, J., Cameron, A. Collier, West, R. G., Faillace, G., Simpson, E. K., Anderson, D.R., Marsh, T. R., Marsh, Tom, Maxted, P. F. L., Haswell, C. A., Smalley, B., Sebastian, D., Breedt, E., Hebb, L., Busuttil, R., Bloemen, S., Collier Cameron, A., Geier, S., Haswell, C.A., Maxted, P.F.L., Kolb, U., Marsh, T.R., Wheatley, P. J., Anderson, D. R., Smith, D.   +34 more
core   +1 more source

Astrometric detection of binary asteroids [PDF]

, 2023
Binary asteroids probe thermal-radiation effects on the main-belt asteroids' evolution. We discuss the possibility of detecting binary minor planet systems by the astrometric wobble of the center-of-light around the center-of-mass.
Ofek, Eran O., Segev, Noam, Polishook, David   +2 more
core   +1 more source

Astrometric Mass Ratios of 248 Long-period Binary Stars Resolved in Hipparcos and Gaia EDR3

The Astronomical Journal, 2021
Abstract Using the absolute astrometric positions and proper motions for common stars in the Hipparcos and Gaia catalogs separated by 24.75 yr in the mean epoch, we compute mass ratios for long-period, resolved binary systems without any astrophysical assumptions or dependencies, except the presence of inner binary subsystems that may ...
Valeri V. Makarov, Claus Fabricius
openaire   +3 more sources

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

Astrometric Observations of Wide Southern Double Stars – II [PDF]

, 2007
Astrometric CCD observations have been made of wide (~3 to 60 arcsec) southern double stars selected from the Washington Double Star catalogue (WDS). Southern double stars have not been well studied in the past; typically they had not been measured since
Christina Bauera, Graeme L. Whitea, Paul A. Jonesb, Jones, Paul A., Hons, Alex, Jones, Paul A., Blank, David L., White, Graeme L., David L. Blanka, Blank, David L, Bauer, Christina, Alex Honsa   +11 more
core   +1 more source

New spectroscopic binary companions of giant stars and updated metallicity distribution for binary systems [PDF]

, 2016
We report the discovery of 24 spectroscopic binary companions to giant stars. We fully constrain the orbital solution for 6 of these systems. We cannot unambiguously derive the orbital elements for the remaining stars because the phase coverage is ...
Vanzi, L., Wittenmyer, R., Drass, H, L. Vanzi, Jenkins, J., Wittenmyer, R. A., Bluhm, P., Rojo, P, Bluhm, P, Voss, J., Vuckovic, M, Wittenmyer, RA, Soto, M., Vuckovic, M., H. Drass, Vanzi, Leonardo, Jenkins, James Stewart, Jones, M. I., C. H. F. Melo, Rojo, P., Olivares, F., Drass, H., Jones, MI, P. Rojo, Soto, M. G, Melo, CHF, R. A. Wittenmyer, F. Olivares, M. Vučković, Mennickent, R. E., Jenkins, J. S., Jones Fernández, Matías Ignacio, Melo, C. H. F., Vanzi, L, Soto, M. G., Olivares, F, M. G. Soto, J. Vos, P. Bluhm, Drass, Holger, J. S. Jenkins, R. E. Mennickent, Mennickent, RE, Melo, C., Jenkins, JS, Mennickent, R., Voss, J, Vos, J., M. I. Jones, Soto, MG   +49 more
core   +1 more source

Gravitoastronomy with neutron stars [PDF]

, 2004
Recent advances in gravitational wave detectors mean that we can start to make astrophysically important statements about the physics of neutron stars based on observed upper limits to their gravitational luminosity.
Woan, G., Graham Woan
core   +1 more source