The mass–radius relationship for very low mass stars: four new discoveries from the HATSouth Survey

摘要: Development of the HATSouth project was funded by NSF MRI grant NSF/AST-0723074, operations are supported NASA grant NNX09AB29G and follow-up observations receive partial support from grant NSF/AST-1108686. Work at Australian National University is ARC Laureate Fellowship Grant FL0992131. Follow-up with ESO 2.2 m/FEROS instrument were performed under MPI guaranteed time [P087.A9014(A), P088.A-9008(A), P089.A-9008(A)]. AJ acknowledges support from FONDECYT 1130857, BASAL CATA PFB06 and Millenium Science Initiative, Chilean Ministry Economy (Nuclei: P10-022-F, P07-021-F). RB NE supported by CONICYT-PCHA/Doctorado Nacional MR by FONDECYT postdoctoral fellowship 3120097. We acknowledge use of AAVSO Photometric All-Sky Survey (APASS), by the Robert Martin Ayers Sciences Fund, SIMBAD data base, operated CDS, Strasbourg, France. Operations the MPG/ESO m telescope jointly Max Planck Gesellschaft European Southern Observatory.