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Center for Astrophysics Research and Technologies Seminar Series Information


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Free-floating Evaporating Gaseous Globules (frEGGS)

Thursday October 26, 2017
2:00 pm

 Presenter:  Raghvendra Sahai, Jet Propulsion Laboratory, California Institute of Technology
 Series:  Center for Astrophysics Research and Technologies Seminar Series
 Abstract:  Understanding the early origins and formation of stars and solar systems like our own, and how the evolutionary details of the star formation process depend on the local environment, is a major enterprise in astrophysics. Massive stars have a strong feedback effect on their environment and can alter the likelihood for the formation of stars in nearby clouds and limit the accretion process of nearby protostars. The formation of the Sun in the pre-solar dense cloud core was likely affected by the debris, and possibly the dynamical impact, of a nearby supernova. We have recently discovered a new class of stellar nurseries embedded within the large HII bubbles of nearby massive star formation regions (dubbed free-floating Evaporating Gaseous Globules or frEGGs), which are possible analogs of the pre-solar cloud core. Because of their relative isolation from surrounding molecular clouds, frEGGs are the best astrophysical laboratories for robust, quantitative testing of cloud collapse models. In this talk, we describe our discovery survey of frEGGs using Spitzer data, and ongoing multiwavelength observational efforts to study their properties.

Acknowledgement: The research for this presentation was carried out at JPL, California Institute of Technology, under a contract with NASA.
 Host:  Ylva Pihlström
 Location:  Room 190, Physics & Astronomy

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