Evolution of the Stellar Mass Tully-Fisher Relation in Disk Galaxy Merger Simulations - Astrophysics > Astrophysics of GalaxiesReportar como inadecuado




Evolution of the Stellar Mass Tully-Fisher Relation in Disk Galaxy Merger Simulations - Astrophysics > Astrophysics of Galaxies - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: There is a large observational scatter toward low velocities in the stellarmass Tully-Fisher relation if disturbed and compact objects are included.However, this scatter can be eliminated if one replaces rotation velocity with$ m S { m 0.5}$, a quantity that includes a velocity dispersion term added inquadrature with the rotation velocity. In this work we use a large suite ofhydrodynamic N-body galaxy merger simulations to explore a possible mechanismfor creating the observed relations. Using mock observations of thesimulations, we test for the presence of observational effects and explore therelationship between $ m S { m 0.5}$ and intrinsic properties of thegalaxies. We find that galaxy mergers can explain the scatter in the TF as wellas the tight $ m S { m 0.5}$-stellar mass relation. Furthermore, $ m S { m0.5}$ is correlated with the total central mass of a galaxy, includingcontributions due to dark matter.



Autor: M.D. Covington, S.A. Kassin, A.A. Dutton, B.J. Weiner, T.J. Cox, P. Jonsson, J.R. Primack, S.M. Faber, D.C. Koo

Fuente: https://arxiv.org/







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