Results 51 to 60 of about 51,217 (241)

An Astrometric Study of the Low-Mass Binary Star Ross 614

The Astronomical Journal, 2003
Long accepted as the quintessential low-mass star, the secondary of the nearby diminutive astrometric binary Ross 614 has attracted considerable astrophysical interest. Unfortunately, the orbital period of 16.6 yr exceeds the duration of the mission-limited studies of most space-borne or instrumental-proving observational programs.
George Gatewood, Louis Coban, Inwoo Han
openaire   +1 more source

Astrometric orbits of spectral binary brown dwarfs – I. Massive T dwarf companions to 2M1059−21 and 2M0805+48 [PDF]

Monthly notices of the Royal Astronomical Society, 2020
Near-infrared spectroscopic surveys have uncovered a population of short-period, blended-light spectral binaries composed of low-mass stars and brown dwarfs.
J. Sahlmann, A. Burgasser, D. B. Gagliuffi, P. Lazorenko, D. Ségransan, M. R. Z. Osorio, Cullen H. Blake, C. Gelino, E. L. Martín, E. L. Martín, H. Bouy   +10 more
semanticscholar   +1 more source

Three-dimensional Orbit of AC Her Determined: Binary-induced Truncation Cannot Explain the Large Cavity in This Post-AGB Transition Disk

The Astrophysical Journal, 2023
Some evolved binaries, namely post–asymptotic giant branch (AGB) binaries, are surrounded by stable and massive circumbinary disks similar to protoplanetary disks found around young stars. Around 10% of these disks are transition disks: they have a large
Narsireddy Anugu, Jacques Kluska, Tyler Gardner, John D. Monnier, Hans Van Winckel, Gail H. Schaefer, Stefan Kraus, Jean-Baptiste Le Bouquin, Steve Ertel, Antoine Mérand, Robert Klement, Claire L Davies, Jacob Ennis, Aaron Labdon, Cyprien Lanthermann, Benjamin R. Setterholm, Theo ten Brummelaar, Akke Corporaal, Laurence Sabin, Jayadev Rajagopal   +19 more
doaj   +1 more source

Color-Induced Displacement double stars in SDSS

, 2004
We report the first successful application of the astrometric color-induced displacement technique (CID, the displacement of the photocenter between different bandpasses due to a varying contribution of differently colored components to the total light),
Bailey, Christy, D. Pourbaix, Finlator, Fukugita, G. R. Knapp, Gunn, Gunn, Gunn, Harris, Heintz, Hogg, Høg, Ivezic, Ivezic, J. E. Gunn, Juric, Pier, Pourbaix, R. H. Lupton, Richards, Skrutskie, Smith, Sorokin, Wielen, York, Ž. Ivezić   +26 more
core   +1 more source

Bayesian analysis of exoplanet and binary orbits

, 2012
We introduce BASE (Bayesian astrometric and spectroscopic exoplanet detection and characterisation tool), a novel program for the combined or separate Bayesian analysis of astrometric and radial-velocity measurements of potential exoplanet hosts and ...
Armstrong, Armstrong, Bayes, Bond, Brooks, Charbonneau, Delplancke, Ford, Gatewood, Gelman, Gregory, Hastings, Holman, Hummel, Hummel, Koch, Kuhn, Lange, Lindegren, Lyot, Mahalanobis, Mamajek, Mao, Marois, Mayor, McArthur, Metropolis, Nascimbeni, Perryman, Perryman, Pickering, Prevot, R. Launhardt, Reffert, Seager, Shao, Smith, Smith, Sozzetti, T. Henning, T. Schulze-Hartung, Thiele, Tolbert, Vigan, Vogt, Wolszczan   +45 more
core   +1 more source

Identifying Companions in Pulsar Binary Systems via Gaia Data

Universe
In the optical band, very few pulsars can be directly detected, but some of the pulsar binary companions can be observed. This study leverages high-precision astrometric data from Gaia Data Release 3 (DR3) to identify pulsar companions in binary systems.
Yueqi Song, Li Guo, Zhen Yan, Qiqi Wu, Guangli Wang, Ying Wang   +5 more
doaj   +1 more source

Microlensing Events from Measurements of the Deflection Angle [PDF]

, 1996
Microlensing events are now regularly being detected by monitoring the flux of a large number of potential sources and measuring the combined magnification of the images.
Hog E., Jordi Miralda-Escudé, Marley M. S., Paczynski B., Refsdal S., Shao M., Turon C., Udalski A.   +7 more
core   +2 more sources

Re-processing the Hipparcos Transit Data and Intermediate Astrometric Data of spectroscopic binaries [PDF]

Astronomy and Astrophysics Supplement Series, 2000
The Intermediate Astrometric Data (IAD) and Transit Data (TD) made available by ESA after the Hipparcos mission make it possible to re-process the observations of any Hipparcos entry. This paper illustrates how TD and IAD may be used in conjunction with the orbital parameters of spectroscopic binaries to improve the astrometric parameters of binaries ...
Pourbaix, Dimitri, Jorissen, Alain
openaire   +2 more sources

Weighing the Darkness. II. Astrometric Measurement of Partial Orbits with Gaia

The Astrophysical Journal, 2023
Over the course of several years, stars trace helical trajectories as they traverse across the sky due to the combined effects of proper motion and parallax.
Jeff J. Andrews, Katelyn Breivik, Chirag Chawla, Carl L. Rodriguez, Sourav Chatterjee   +4 more
doaj   +1 more source

The PHASES Differential Astrometry Data Archive. V. Candidate Substellar Companions to Binary Systems [PDF]

, 2010
The Palomar High-precision Astrometric Search for Exoplanet Systems monitored 51 subarcsecond binary systems to evaluate whether tertiary companions as small as Jovian planets orbited either the primary or secondary stars, perturbing their otherwise ...
Alan P. Boss, Allen, Baize, Bean, Benedict, Benjamin F. Lane, Bernard F. Burke, Boss, Colavita, Couteau, Couteau, Cumming, Han, Hartkopf, Hatzes, Henry, Holman, Howard, Konacki, Lane, Lloyd, M. M. Colavita, M. Shao, M. Williamson, Maciej Konacki, Makarov, Mason, Mason, Matthew W. Muterspaugh, Mayer, McArthur, Mugrauer, Muterspaugh, Muterspaugh, Muterspaugh, Muterspaugh, Muterspaugh, Nelson, Perryman, Pfahl, Pravdo, Pravdo, Queloz, S. R. Kulkarni, Shao, Söderhjelm, Tokovinin, van Leeuwen, William I. Hartkopf   +48 more
core   +2 more sources