NOAO >   Observing Info >   Approved Programs >   2018A-0009

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Program Information for 2018A-0009


PI: Andrei Tokovinin, NOAO, atokovinin@ctio.noao.edu
Address: CTIO, Casilla 603 AURA, La Serena Chile

Title: Spectroscopic orbits in nearby triple systems

Abstract: This project fills missing data in a large sample of solar-type triple stars within 67pc to elucidate the statistics of hierarchical multiples. Follow-up observations of spectroscopic subsystems discovered with CHIRON in 2014-2015 and other previously known spectroscopic subsystems in triple stars will determine their unknown periods to define the period distribution at $P<1000$,d. Owing to the large size of the parent volume-limited sample, this distribution reveals for the first time features related to the formation of subsystems and their dynamical evolution. However, it is necessary to determine the remaining unknown periods before making firm conclusions and comparing observations with theoretical models of tidal evolution.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2018A):  CT-1.5m-SVC/CHIRON -- 40hrs


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2018A-0009

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