Study Reveals Long-Sought Secret of the Stars (4 of 5) (video) American Association for the Advancement of Science Share Print E-Mail Loading video... Caption Column densities as viewed perpendicular to the orbital plane and at times after the merger. The merger causes an outflow of material, with the field of ejecta dropping to lower and lower densities and column densities as it expands. At late times in the simulation, while the ejecta continues streaming outward, the bound merger product in the center of the system gradually reaches larger column densities as more material falls back to its surface. This video relates to a paper that appeared in Jan. 25, 2013, issue of Science, published by AAAS. The paper, by N. Ivanova at the University of Alberta in Edmonton, AB, Canada, and colleagues was titled, "Identification of the Long-Sought Common-Envelope Events." Credit [Video courtesy of James C. Lombardi Jr. using SPLASH (Price 2007)] Usage Restrictions Please cite the owner of the video when publishing. This video may be freely used by reporters as part of news coverage, with proper attribution. Non-reporters must contact Science for permission. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.