Seminar
Studying the Halo via Its NEarby low-mass Dwarfs

Studying the Halo via Its NEarby low-mass Dwarfs (SHINED) is an ongoing project aiming to understand the Galactic halo with metal-deficient low-mass stars (LMS) and brown dwarfs (BD). At the first stage of the project we are focusing on the discovery and characterisation of halo LMS and BD. I give an overview of the SHINED project then brief discuss the proprieties of halo LMS and BD. I introduce the main results of our work on red subdwarf binaries (Zhang et al. MNRAS, 434, 1005). I talk more about our work on the search of L subdwarfs from SDSS and UKIDSS. I discuss the spectral types of L subdwarfs, and spectral signature of halo BD. I also discuss the location of the Substellar Subdwarf Gap predicted by low-mass evolutionary models.