4 transiting F-M binary systems : J/MNRAS/437/2831

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Authors : Zhou G. orcid , Bayliss D., Hartman J.D. (hide) , Bayliss D., Hartman J.D. et..al

VizieR DOI : 10.26093/cds/vizier.74372831
Bibcode : 2014MNRAS.437.2831Z (ADS) (Simbad) (Objects)
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CDS Keywords : Binaries, eclipsing; Photometry, SDSS; Radial velocities
UAT : Eclipsing binary stars, Optical astronomy, Sloan photometry, Radial velocity

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Inserted into VizieR : 07-Apr-2016
Last modification : 07-Aug-2024

The mass-radius relationship for very low mass stars four new discoveries from the HATSouth Survey. (2014)

Keywords : binaries eclipsing - stars: low-mass

Abstract:We report the discovery of four transiting F-M binary systems with companions between 0.1 and 0.2M_{sun}_ in mass by the HATSouth survey. These systems have been characterized via a global analysis of the HATSouth discovery data, combined with high-resolution radial velocities and accurate transit photometry observations. We determined the masses and radii of the component stars using a combination of two methods: isochrone fitting of spectroscopic primary star parameters and equating spectroscopic primary star rotation velocity with spin-orbit synchronization. These new very low mass companions are HATS550-016B (0.110_-0.006_^+0.005^M_{sun}_, 0.147_-0.004_^+0.003^R_{sun}_), HATS551-019B (0.17_-0.01_^+0.01^M_sun}_, 0.18_-0.01_^+0.01^R_{sun}_), ...(more)
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The transiting VLMS systems were identified from photometric observations by the HATSouth global network. HATSouth consists of six telescope units spread over three sites, SSO in Australia, LCO in Chile and the HESS site in Namibia, providing continuous monitoring of 128deg^2^ fields in the southern sky. Radial velocity measurements derived from high-resolution spectroscopic observations were obtained for the VLMS systems using the Echelle spectrograph on the ANU 2.3m telescope at SSO, the fibre-fed echelle spectrograph CORALIE on the Swiss Leonard Euler 1.2m telescope at La Silla Observatory (LSO), Chile, and the fibre-fed echelle spectrograph FEROS on the MPG/ESO 2.2m telescope at LSO. 


                


                

                    

                


                

                    

                


                

                    
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