Speckle Interferometry at SOAR in 2019

Tokovinin, Andrei; Mason, Brian D.; Mendez, Rene A.; Costa, Edgardo; Horch, Elliott P.

Abstract

The results of speckle-interferometric observations at the 4.1 m Southern Astrophysical Research Telescope in 2019 are given, totaling 2555 measurements of 1972 resolved pairs with separations from 15 mas (median 021) and magnitude difference up to 6 mag, and non-resolutions of 684 targets. We resolved for the first time 90 new pairs or subsystems in known binaries. This work continues our long-term speckle program. Its main goal is to monitor orbital motion of close binaries, including members of high-order hierarchies and Hipparcos pairs in the solar neighborhood. We give a list of 127 orbits computed using our latest measurements. Their quality varies from excellent (25 orbits of grades 1 and 2) to provisional (47 orbits of grades 4 and 5).

Más información

Título según WOS: Speckle Interferometry at SOAR in 2019
Título de la Revista: ASTRONOMICAL JOURNAL
Volumen: 160
Número: 1
Editorial: IOP PUBLISHING LTD
Fecha de publicación: 2020
DOI:

10.3847/1538-3881/AB91C1

Notas: ISI