RSAA Colloquia / Seminars / Feast-of-Facts: Tuesday, 23 February 2021, 10:00-11:00; Duffield Lecture Theatre and ZOOM


Dilyar Barat

"End-of-Thesis Talk: Unified Kinematic Scaling Relation in the Local Universe using Integral Field Spectroscopy Surveys"

In this thesis we study the dynamical scaling relation between galaxy stellar mass M* and the general kinematic parameter S_K = sqrt( K Vrot^2 + sigma^2) that combines rotation velocity Vrot and velocity dispersion sigma and have previously shown potential for combining galaxies of all morphologies in a single scaling relation. For the construction of this scaling relation, we make use of the data from the Sydney-AAO Multi-object Integral-field spectroscopy (SAMI) Galaxy Survey. We investigate the applicability of the logM* - logS_K scaling relation on galaxies ranging from elliptical galaxies to late-type spiral galaxies, we also investigate the effect of using either the stars or the gas component of galaxies as the kinematic tracer, we optimise the combination method of Vrot and sigma by varying the K value in the S_K parameter, and we also compare the kinematic measurements from IFS survey to single-fibre spectroscopy with the intention of applying the findings to large-scaling single-fibre spectroscopy galaxy surveys. Where the galaxy scaling relation from SAMI reaches its limit, we introduce the Study of H_alpha from Dwarf Emissions (SHaDE), a high spectral resolution (R=13500) H_alpha integral field survey of 69 dwarf galaxies with stellar masses 10^6< M* < 10^9 M_sol. We extend the study of logM* - logS_K scaling relation to include low-mass dwarf galaxy in an attempt of making the scaling relation truly universal. We find that ... * *for more exciting content, be sure to tune in to the talk.