High-Velocity Ejecta in Core-Collapse and Thermonuclear Supernovae

مرکز و کتابخانه مطالعات اسلامی به زبان های اروپایی

منو

" High-Velocity Ejecta in Core-Collapse and Thermonuclear Supernovae "
Weil, Kathryn E. Fesen, Robert A.

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	1114333
Doc. No	:	TLpq2406966200
Main Entry	:	Fesen, Robert A.
	:	Weil, Kathryn E.
Title & Author	:	High-Velocity Ejecta in Core-Collapse and Thermonuclear Supernovae\ Weil, Kathryn E.Fesen, Robert A.
College	:	Dartmouth College
Date	:	2020
student score	:	2020
Degree	:	Ph.D.
Page No	:	167
Abstract	:	Supernovae (SNe) play an important role for the chemical enrichment of the interstellar medium of their host galaxies, and the creation of neutron stars and stellar-mass black holes. Using multi-wavelength ground- and space-based observations, I have investigated the chemical content and dynamics of core-collapse (Type II) and thermonuclear (Type Ia) supernovae and supernova remnants (SNRs) to gain insights into the end stages of stellar evolution. Studies of evolved SNe and young SNRs can inform us about some of the details regarding SN ejecta evolution and interactions with the local circumstellar and interstellar environment. My study of the large-scale interstellar environment around the 350 year old galactic SNR, Cas A, has led to a better understanding of its progenitor's pre-SN mass-loss history. My spectroscopic study of the Type II-P SN 2017eaw's late-time nebular phase emission obtained nearly three years post-maximum light revealed the first evidence for its circumstellar interaction with a shell of mass-loss material, expelled approximately 2000 - 2500 years prior to explosion.
Subject	:	Astronomy
	:	Astrophysics
	:	Interstellar medium
	:	Supernova
	:	Supernova remnants