Our knowledge of the formation and evolution of dwarf galaxies is limited. To gain a better understanding of the formation history of the nearby Small and Large Magellanic Clouds, SMASH (Survey of the MAgellanic Stellar History) has imaged ~2400 square degrees (at 20% filling factor) to 24th mag in gri (uz~23). These observations are alllowing us to map the expected stellar debris, extended stellar populations, and star formation histories of the Clouds with unprecedented fidelity. We are announcing the first SMASH data release, which features catalogs from ~70 DECam fields. This release highlights the new data publication functionality of the NOAO Data Lab. The SMASH catalogs of forced-PSF photometry have high photometric precision (~0.2%) and accuracy (~1-2%) with exceptional astrometry (~20 mas) using Gaia reference stars. Our initial results include the discovery of (1) an extended stellar population around the Large Magellanic Cloud to ~19 kpc in many directions, (2) the Milky Way dwarf spheroidal galaxy Hydra II, and (3) a tidally disrupting globular cluster of the Large Magellanic Cloud (SMASH 1).
American Astronomical Society Meeting Abstracts #229
- Pub Date:
- January 2017