Catherine Vlahakis (Joint ALMA Observatory) -- First Science Results with ALMA at Long Baselines

Imaging at resolutions of tens of milliarcseconds, requiring baselines of up to ~15 km, is a major goal of the Atacama Large Millimeter/submillimeter Array (ALMA). To develop and verify this capability, a Long Baseline Campaign was carried out at the end of 2014, which resulted in a set of Science Verification (SV) observations. The SV targets were Juno, an asymmetric asteroid; Mira, a well-studied AGB star, HL Tau, a young star with a circumstellar disk; 3C 138, a strongly polarized extended quasar; and SDP. 81 (HATLAS J090311.6+003906), a z~3 gravitationally lensed submillimeter galaxy. The campaign was successful and baselines up to ~10 km have been offered for ALMA Cycle 3. In this talk I will describe the Long Baseline Campaign and the initial science results from the SV data that are presented in a set of publications by the ALMA Partnership. I will focus on the results on SDP.81 and summarize some science results from the community using these rich public data.