Invited Presentation

High resolution survey of massive cores in Cygnus-X

Author(s): Keping Qiu (Nanjing University)

Presenter: Keping Qiu (Nanjing University)

What are the initial conditions of high-mass star and cluster formation? Do high-mass protostars acquire mass in a way similar to Sun-like stars? Single-dish surveys and a continuously growing number of interferometric studies have greatly advanced our understanding of these questions. However, it is not straightforward to directly compare those observations, because they have different resolutions, sensitivities, and target sources at different distances. We are undertaking a systemic survey of massive cores in Cygnus-X, with is one of the richest and nearest star-forming complex in our Galaxy, using the SMA, JVLA, and JCMT. The survey is also complemented by our CARMA and ALMA observations toward selected sources, and archival Herschel and Spitzer data. Here we present some preliminary results of the survey, focusing on a statistical analysis of the core fragmentation properties based on the dust continuum maps, as well as outflow activities revealed by CO and SiO lines.