THE SOLAR NEIGHBORHOOD. XXII. PARALLAX RESULTS FROM THE CTIOPI 0.9 m PROGRAM: TRIGONOMETRIC PARALLAXES OF 64 NEARBY SYSTEMS WITH 0.″5 ⩽μ⩽ 1.″0 yr^–1(SLOWMO SAMPLE)

Abstract

We present trigonometric parallaxes of 64 stellar systems with proper motions\nbetween 0\\farcs5 yr$^{-1}$ and 1\\farcs0 yr$^{-1}$ from the ongoing RECONS\n(Research Consortium On Nearby Stars) parallax program at CTIO (the Cerro\nTololo Interamerican Observatory). All of the systems are south of DEC $= +30$,\nand 58 had no previous trigonometric parallaxes. In addition to parallaxes for\nthe systems, we present proper motions, Johnson-Kron-Cousins $VRI$ photometry,\nvariability measurements, and spectral types. Nine of the systems are multiple;\nwe present results for their components, three of which are new astrometric\ndetections. Of the 64 systems, 56 are within 25 parsecs of the Sun and 52 of\nthose are in the southern hemisphere, comprising 5.7\\% of the total number of\nknown southern 25 parsec systems.\n