Student Project &
Research Symposium

Oral
Presentation

Student Project &
Research Symposium

Poster
Presentation

Student Project &
Research Symposium

Performance

Student Project &
Research Symposium

Exhibition

College Center Ballroom
Correlations Between Cold Gas Content and Galaxy Structural Parameters
Cameron Law, Evangela Shread, and Trevor Weiss
Date:
April 22nd, 2022
Division:
Mathematics and Sciences
Department:
Astronomy
Mentor:
Jerome Fang
Mentor's e-mail:
jfang5@occ.cccd.edu
Author's e-mail:
eshread@student.cccd.edu
Presentation Slides
Abstract:

Stars are formed in galaxies from the collapse of gas clouds composed mostly of hydrogen. It has been previously shown that the amount of gas in a galaxy depends on its shape and structure (its morphology), and that spiral galaxies tend to host more gas. Measuring gas content is somewhat difficult to do, so it would be beneficial to use easy-to-measure quantities to estimate gas content in galaxies. Our gas measurements are taken from archival data, yielding a sample of 230 galaxies with molecular hydrogen (H2) measurements and 4,094 with atomic hydrogen (HI) measurements. We examine the correlations between HI and H2 gas content and different structural parameters that measure the distribution of mass within the galaxies. We find that gas content is correlated most strongly with the density of stars in the inner regions of the galaxies, especially within the inner 3,000 light-years. Our findings offer a method for astronomers to estimate the gas content using easily obtainable morphological parameters, which is very useful in situations where it is difficult or impossible to obtain direct gas measurements.

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