OAJ Legacy Surveys
JAST80 legacy projects
Mini-HAWKs is a ~50 sqr deg pathfinder of the Galactic Plane down to r~21 that uses 3 specially customized Hα filters that are optimized to select targets with broad Hα emission lines, formed in accretion discs around black holes (BHs). It will prove a novel photometric strategy that will eventually lead to the discovery of ~150 new Galactic accreting BHs i.e. a ten-fold increase over the known population. That will allow constraining the number density, orbital period distribution, kinematics and, ultimately, the BH mass spectrum. It will also uncover and characterize large numbers of other Hα emitting objects in the Galaxy to unprecedented depths, as well as, it will also furnish ~14h light curves of every object.
J-ALFIN, the Javalambre Assessment of Late stellar Feedback to the ISM by evolved Nebulae, will take advantage of the unprecedented field-of-view of the T80Cam at the JAST80 to map the large-scale emission of a carefully selected sample of Galactic nebulae around evolved stars. The late stages of dilution of planetary nebulae and nova remnants around low- and intermediate-mass stars, and Wolf-Rayet bubbles around massive stars, nebulae around supergiant B[e] stars and supernova remnants will be investigated in detail to assess the spatial extent and yields of different stars to the Interstellar Medium.
MUDEHaR (MUlti-epoch Disparity Examination of H-Alpha and infraRed) is a multi-epoch photometric survey in Hα and the calcium triplet window that uses T80Cam at the JAST80 telescope at Javalambre. It will obtain 100 epochs per field for 20 fields in the Galactic disk, each of two square degrees, for a total of 40 square degrees. Its main goal is to detect tens of thousands of variable Hα stars on a days-months-years scale, including massive stars with a magnetic field, pulsating stars, active M stars, and other types of variable stars. All data will be made available for public exploitation.
North-PHASE (Periodicity, Hot spots, Accretion Stability and Early evolution in young stellar clusters in the Northern Hemisphere) is a project led by the University of Dundee (UK) that "uses time to map space" to unveil the star-disk connection of young stars during the epochs of planet formation. The physical scales in the inner planet-forming disk and star are too small to be addressed by direct imaging, but time-resolved, multi-band photometric variability with broad- and narrow-band filters allows us to explore accretion, stellar spots and occultations by the innermost disk. Over 5 years, we can study how these change in timescales similar to inner planet orbits for thousands of young stars in clusters.