Mass assembly in star formation via interstellar filaments

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dc.contributor.authorChen, Michael Chun-Yuan
dc.contributor.supervisorDi Francesco, James
dc.contributor.supervisorWillis, Jon
dc.date.accessioned2021-01-29T06:12:38Z
dc.date.copyright2021en_US
dc.date.issued2021-01-28
dc.degree.departmentDepartment of Physics and Astronomyen_US
dc.degree.levelDoctor of Philosophy Ph.D.en_US
dc.description.abstractUnderstanding how diffuse molecular clouds at large scales (~10 pc) assemble mass into dense, star-forming cores at small scales (~ 0.1 pc) is crucial to building a holistic theory of star formation. While recent observations suggest that filaments play an important role in the mass assembly of dense cores, detailed gas kinematics studies are still lacking. My dissertation presents three innovative techniques that enable us to study star-forming filaments' complex gas kinematics in unprecedented detail: multi-component spectral fit, multi-dimensional filament identification, and membership assignment of velocity-coherent structures. Through these techniques, I analyzed star-forming filaments in the Perseus Molecular Cloud and unveiled unexpectedly complex velocity structures at scales where filaments are well resolved, to as low as the 0.01 pc scale. Moreover, the correlations I discovered between the various filament properties further suggest a scenario in which thermally supercritical filaments grow continuously via accretion from their surroundings while simultaneously forming cores through fragmentation along their lengths.en_US
dc.description.embargo2022-01-08
dc.description.scholarlevelGraduateen_US
dc.identifier.bibliographicCitationChen, M. C.-Y., Di Francesco, J., Rosolowsky, E., et al. 2020, The Astrophysical Journal, 891, 84.en_US
dc.identifier.urihttp://hdl.handle.net/1828/12623
dc.languageEnglisheng
dc.language.isoenen_US
dc.rightsAvailable to the World Wide Weben_US
dc.subjectstar formationen_US
dc.subjectmolecular cloudsen_US
dc.subjectinterstellar mediumen_US
dc.subjectastrophysicsen_US
dc.subjectastronomyen_US
dc.subjectturbulenceen_US
dc.subjectgas kinematicsen_US
dc.subjectinterstellar filamentsen_US
dc.subjectmolecular spectroscopyen_US
dc.subjectISM: cloudsen_US
dc.subjectISM: kinematics and dynamicsen_US
dc.subjectISM: structureen_US
dc.subjectstars: formationen_US
dc.subjectradio astronomyen_US
dc.titleMass assembly in star formation via interstellar filamentsen_US
dc.typeThesisen_US

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