Gas Temperature in the Intergalactic Medium (video) Yale University Share Print E-Mail Loading video... Caption This animation shows gas temperature in the IGM, looking through the sheet in-between the two main halos. Red colors are hot gas, while blue colors are cold gas. A shock wave is visible moving onto the forming sheet, causing the sheet to shatter, producing a multiphase mixture of hot and cold gas with granular morphology. Credit Yale University Usage Restrictions None 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.