Speckle Interferometry at SOAR in 2016 and 2017

By A. Tokovinin, B. Mason, W. Hartkopf, R. Mendez, Elliott Horch. 2014

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The results of speckle interferometric observations at the 4.1 m Southern Astrophysical Research Telescope in 2016 and 2017 are given, totaling 2483 measurements of 1570 resolved pairs and 609 non-resolutions. We describe briefly recent changes in the instrument and observing method and quantify the accuracy of the pixel scale and position angle calibration. Comments are given on 44 pairs resolved here for the first time. The orbital motion of the newly resolved subsystem BU 83 Aa,Ab roughly agrees with its 36-year astrometric orbit proposed by J. Dommanget. Most Tycho binaries examined here turned out to be spurious.

Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/c8ba00c36ebb2d34e5ee72d945bc1567c20df9e1

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Citations in the corpus

Multiplicity among Solar-type Stars (2017, background): “At the epoch of our spectroscopic observations (2015 July), the ΔmV=2.2mag fainter secondary was separated at ρ;2 3 (Tokovinin et al. 2014), meaning that a significant part of its light also passed the 2″ entrance aperture of the spectrograph while the primary was observed.”
Massive pulsating stars observed by BRITE-Constellation - I. The triple system β Centauri (Agena) (2016, background): “New observations made by means of speckle interferometry (Tokovinin et al. 2010, 2014, 2015; Hartkopf et al. 2012) indicate much smaller and rapidly decreasing separation between the components (Fig.”
RADIAL VELOCITIES OF SOUTHERN VISUAL MULTIPLE STARS (2014, methodology): “HD 12873 and 12889 belong to the nearby quadruple system ADS 1652 (Tokovinin et al. 2014b).”
OBSERVATIONS OF HIERARCHICAL SOLAR-TYPE MULTIPLE STAR SYSTEMS (2015, background): “The separation has decreased since it was discovered in 2012; (Tokovinin et al. 2014) was able to resolve it with visible speckle interferometry at the 4.1 m SOAR telescope on 2013.73 at 41mas (Tokovinin et al. 2014).”
Searching for faint companions with VLTI/PIONIER - II. 92 main sequence stars from the Exozodi survey (2014, background): “3.4, the F5Vstar HD 15798 was recently shown to host a faint companion at an angular distance of 0′′.21 by Tokovinin et al. (2014).”