On the origin of the Tully-Fisher relation

Abstract

We discuss the origin of the Tully-Fisher (TF) relation using the $N$-body/SPH method, which includes cooling, star formation and stellar feedback of energy, mass and metals. We consider initially rotating overdense spheres, and trace formation processes of disk galaxies from $z=25$ to $z=0$ in the Cold Dark Matter (CDM) cosmology. To clarify the origin of the TF relation, we simulate formation of 14 galaxies with different masses and spin parameters, and compute observable values, such as the total magnitude and the line-width. We find that the simulated galaxies reproduce the slope and scatter of the TF relation: the slope is originated in the difference of total galactic masses, and the scatter is produced by the difference of initial spin parameters. As well as the TF relation, observed features of spiral galaxies, such as the exponential light-profile and the flat rotation curve, are reproduced in our simulations, which were assumed {\it a priori} in past semi-analytical approaches.

11 pages, including 6 figures, submitted to ApJ

References in corpus (16)

• The Formation of Galactic Disks
• Simulations of X-ray Clusters
• Cosmological Simulations with TreeSPH
• The Effects of a Photoionizing UV Background on the Formation of Disk Galaxies
• The Assembly of Galaxies in a Hierarchically Clustering Universe
• Nucleosynthesis in Type Ia Supernovae
• Feedback, Disk Self-regulation and Galaxy Formation
• Nucleosynthesis in Type II Supernovae
• The cosmological origin of the Tully-Fisher relation
• The I-Band Tully-Fisher Relation for Cluster Galaxies: a Template Relation, its Scatter and Bias Corrections
• GRAPESPH: Cosmological SPH simulations with the special purpose hardware GRAPE
• The Formation of Disk Galaxies in a Cosmological Context: Structure and Kinematics
• Two--body heating in numerical galaxy formation experiments
• The Tully-Fisher Relation and H_not
• Photometric Evolution of Galaxies in Cosmological Scenarios
• A Unified Scaling Law in Spiral Galaxies

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• Starbursts in barred spiral galaxies. VI. HI observations and the K-band Tully-Fisher relation
• Simultaneous Modelling of the Stellar Halo and Globular Cluster System of NGC 5128
• Mass-to-light ratios from the fundamental plane of spiral galaxy disks
• Revisiting the Scale Length-mu0 Plane and the Freeman Law in the Local Universe
• Environment and mass dependencies of galactic $\lambda$ spin parameter: cosmological simulations and observed galaxies compared
• The Fundamental Plane of Spiral Galaxies: Theoretical Expectations
• The Role of Clustering of Sub-Clumps in Bright Elliptical Galaxy Formation from a Low-Spin Seed Galaxy
• The space density distribution of galaxies in the absolute magnitude - rotation velocity plane: a volume-complete Tully-Fisher relation from CALIFA stellar kinematics
• The Fundamental Plane of Spiral Galaxies: Search from Observational Data
• The Tully-Fisher relation from SDSS-MaNGA: Physical causes of scatter and variation at different radii
• Quantifying galactic morphological transformations in the cluster environment
• The spin of late-type galaxies at redshifts z < 1.2
• Acceleration Method of Neighbor Search with GRAPE and Morton-ordering
• Past, present and Future of the Scaling Relations of Galaxies and Active Galactic Nuclei