03754nam 22007095 450 991030043540332120200705212656.03-662-44969-210.1007/978-3-662-44969-1(CKB)3710000000271842(EBL)1968665(SSID)ssj0001386449(PQKBManifestationID)11896951(PQKBTitleCode)TC0001386449(PQKBWorkID)11350942(PQKB)10412890(DE-He213)978-3-662-44969-1(MiAaPQ)EBC1968665(PPN)183098056(EXLCZ)99371000000027184220141103d2015 u| 0engur|n|---|||||txtccrThe Earliest Stages of Massive Clustered Star Formation: Fragmentation of Infrared Dark Clouds /by Ke Wang1st ed. 2015.Berlin, Heidelberg :Springer Berlin Heidelberg :Imprint: Springer,2015.1 online resource (160 p.)Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053Description based upon print version of record.3-662-44968-4 Includes bibliographical references at the end of each chapters.Scientific background -- An Infrared Point Source Survey -- The “Dragon” Nebula G28.34+0.06 -- The “Snake” Nebula G11.11–0.12 -- The Infrared Dark Cloud G30.88+0.13 -- A New Evolutionary Picture.This thesis presents an in-depth, high-resolution observational study on the very beginning of the formation process: the fragmentation of dense molecular clouds known as infrared dark clouds (IRDCs). Using the Submillimeter Array (SMA) and Very Large Array (VLA) radio interferometers, the author has discovered a common picture of hierarchical fragmentation that challenges some of the leading theoretical models and suggests a new, observation-driven understanding of how massive star formation in clustered environments may begin: it is initiated by the hierarchical fragmentation of a dense filament from 10 pc down to 0.01 pc, and the stellar mass buildup is simultaneously fed by hierarchical accretion at similar scales. The new scenario points out the importance of turbulence and filamentary structure, which are now receiving increasing attention and further tests from both observers and theorists.Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053AstronomyObservationsAstronomy—ObservationsAtmospheric scienceMicrowavesOptical engineeringAstronomy, Observations and Techniqueshttps://scigraph.springernature.com/ontologies/product-market-codes/P22014Atmospheric Scienceshttps://scigraph.springernature.com/ontologies/product-market-codes/G36000Microwaves, RF and Optical Engineeringhttps://scigraph.springernature.com/ontologies/product-market-codes/T24019AstronomyAstronomy—Observations.Atmospheric science.Microwaves.Optical engineering.Astronomy, Observations and Techniques.Atmospheric Sciences.Microwaves, RF and Optical Engineering.523.88Wang Keauthttp://id.loc.gov/vocabulary/relators/aut755911MiAaPQMiAaPQMiAaPQBOOK9910300435403321The Earliest Stages of Massive Clustered Star Formation: Fragmentation of Infrared Dark Clouds2510905UNINA