Using The Cannon to study the chemistry of the Sagittarius dwarf galaxy /Show full item record
|Title||Using The Cannon to study the chemistry of the Sagittarius dwarf galaxy /|
|Abstract||Sagittarius (Sgr), a dwarf spheroidal galaxy and satellite to the Milky Way, is in the process of being tidally torn apart and stripped of its stars. To study the chemical distribution of Sgr, we analyzed spectra for thousands of stars across the galaxy, whose membership has been previously confirmed. We have analyzed the stellar component of Sgr by using The Cannon, a data-driven method for determining stellar parameters (temperature, surface gravity, [M/H], [a/M], and elemental abundances) from stellar spectra, trained using stars observed by the SDSS/APOGEE survey. The Cannon analysis produced accurate abundances for the 1,100 Sgr member stars that confirms a metallicity gradient across the Sgr galaxy. Additionally, we found evidence for enhanced [a/M] for stars with near-solar [M/H], likely evidence for recent, 2 Gyr burst of star formation, similar to the Large Magellanic Cloud.|
|Description||M.S.Texas Christian University2019
Department of Physics and Astronomy; advisor, Peter M. Frinchaboy III.
Includes bibliographical references.
Online resource; title from PDF title page (viewed July 3, 2019).
This item appears in the following Collection(s)
- Theses and Dissertations