عنوان

High-Velocity Ejecta in Core-Collapse and Thermonuclear Supernovae

Number

TLpq2406966200

.Language of Text, Soundtrack etc

انگلیسی

Title Proper

High-Velocity Ejecta in Core-Collapse and Thermonuclear Supernovae

General Material Designation

[Thesis]

First Statement of Responsibility

Weil, Kathryn E.

Subsequent Statement of Responsibility

Fesen, Robert A.

Name of Publisher, Distributor, etc.

Dartmouth College

Date of Publication, Distribution, etc.

2020

Specific Material Designation and Extent of Item

167

Dissertation or thesis details and type of degree

Ph.D.

Body granting the degree

Dartmouth College

Text preceding or following the note

2020

Text of Note

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.

Astronomy

Astrophysics

Interstellar medium

Supernova

Supernova remnants

Fesen, Robert A.

Weil, Kathryn E.

Electronic name

p

[Thesis]

276903

a

Y