Investigating the Dependence of the Baryonic j-M-f_gas Relationship on Different Star Formation Laws

Costa, Andrea (2024) Investigating the Dependence of the Baryonic j-M-f_gas Relationship on Different Star Formation Laws. Bachelor's Thesis, Astronomy.

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Abstract

This thesis investigates the dependence of the jbar − Mbar − fgas relationship on different star formation laws. The study aims to test a semi-analytical galaxy evolution model using various star formation laws, including the classical Kennicutt-Schmidt law based on gas surface densities, a revised version of the Kennicutt-Schmidt law fitted with data that also includes low-density regions, and a law which also includes a dependence on the angular speed of the disk rotation. By implementing these laws, we aim to provide a more accurate prediction of star formation rates across different regions of galactic disks. Our model is able to reproduce the relation both qualitatively and quantitatively, supporting the concept of inside-out gas accretion. We show that the consideration of different star formation laws does not significantly affect the predicted jbar − Mbar − fgas relation. Particularly, our results suggest that the more crucial ingredient of the model is the inside-out growth assumption. The (gas and stellar) surface density profiles using the new star formation laws are in better agreement with observations for the example galaxy NGC 2403. However, this analysis should be done with more galaxies before a definitive conclusion can be drawn. Future work should explore different parameter values for the accreting angular momentum, consider a star formation law based on volume densities, as well as revise other assumptions like the rotation curve functional form.

Item Type:	Thesis (Bachelor's Thesis)
Supervisor name:	Fraternali, F. and Pezzulli, G.
Degree programme:	Astronomy
Thesis type:	Bachelor's Thesis
Language:	English
Date Deposited:	15 Jul 2024 07:58
Last Modified:	15 Jul 2024 07:58
URI:	https://fse.studenttheses.ub.rug.nl/id/eprint/33339

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