Frequency analysis of DAV pulsators using TESS data

Thumbnail Image
Date
2019-01-01
Authors
Schrandt, Cory
Major Professor
Advisor
Steven D. Kawaler
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Authors
Research Projects
Organizational Units
Organizational Unit
Physics and Astronomy
Physics and astronomy are basic natural sciences which attempt to describe and provide an understanding of both our world and our universe. Physics serves as the underpinning of many different disciplines including the other natural sciences and technological areas.
Journal Issue
Is Version Of
Versions
Series
Department
Physics and Astronomy
Abstract

The work presented in this thesis is designed to demonstrate the value and capacities of TESS to contribute to asteroseismology of compact pulsators. I find that TESS data are able to reproduce some of the results obtained by the ground by collaborations like the Whole Earth Telescope (WET) given its ability to observe a star nearly continuously for approximately 27 days. I also address some of the weaknesses of the TESS observations for these purposes, such as the CCD pixel size on the TESS cameras, long integration times, and the bandpass of the telescope's detector. I examined four white dwarf pulsators and found that the MCT 0145-2211 and HE 0532-5605 lack long lifetime modes of pulsation. I place upper limits on the amplitudes of any pulsations in the TESS bandpass. The hottest of the pulsators studied, ZZ Ceti, appeared as expected (after accounting for the TESS bandpass) based on the many ground-based observations of the star. Ultimately the results of this work demonstrate the value of TESS as the next step forward in the field of asteroseismology.

Comments
Description
Keywords
Citation
DOI
Source
Subject Categories
Copyright
Thu Aug 01 00:00:00 UTC 2019