The Spectroscopy and H-band Imaging of Virgo Cluster Galaxies (SHIVir) Survey: Scaling Relations and the Stellar-to-total Mass Relation
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Ouellette_2017_ApJ_843_74.pdf
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Author(s)
Ouellette, Nathalie N.-Q.
Courteau, Stéphane
Holtzman, Jon A.
Dutton, Aaron A.
Cappellari, Michele
Dalcanton, Julianne J.
Roediger, Joel C.
Taylor, James E.
Tully, R. Brent
Côté, Patrick
Date Issued
July 2017
Journal
Astrophysical Journal
Publisher
IOP Publishing
Citation
Ouellette, Nathalie N.-Q. et al. “The Spectroscopy and H-Band Imaging of Virgo Cluster Galaxies (SHIVir) Survey: Scaling Relations and the Stellar-to-Total Mass Relation.” The Astrophysical Journal 843, 1 (July 2017): 74 © 2017 The American Astronomical Society
Version
Final published version
Abstract
We present parameter distributions and fundamental scaling relations for 190 Virgo cluster galaxies in the SHIVir survey. The distribution of galaxy velocities is bimodal about V[subscript circ ]∼ 125 km s[superscript -1] , hinting at the existence of dynamically unstable modes in the inner regions of galaxies. An analysis of the Tully-Fisher relation (TFR) of late-type galaxies (LTGs) and the fundamental plane (FP) of early-type galaxies (ETGs) is presented, yielding a compendium of galaxy scaling relations. The slope and zero-point of the Virgo TFR match those of field galaxies, while scatter differences likely reflect distinct evolutionary histories. The velocities minimizing scatter for the TFR and FP are measured at large apertures where the baryonic fraction becomes subdominant. While TFR residuals remain independent of any galaxy parameters, FP residuals (i.e., the FP "tilt") correlate strongly with the dynamical-to-stellar mass ratio, yielding stringent galaxy formation constraints. We construct a stellar-to-total mass relation (STMR) for ETGs and LTGs and find linear but distinct trends over the range M[subscript ∗] = 10[superscript 8-11] M[subscript circle with dot in center]. Stellar-to-halo mass relations (SHMRs), which probe the extended dark matter halo, can be scaled down to masses estimated within the optical radius, showing a tight match with the Virgo STMR at low masses; possibly inadequate halo abundance matching prescriptions and broad radial scalings complicate this comparison at all masses. While ETGs appear to be more compact than LTGs of the same stellar mass in projected space, their mass-size relations in physical space are identical. The trends reported here may soon be validated through well-resolved numerical simulations.
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT Kavli Institute for Astrophysics and Space Research
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DOI of Published Version
https://doi.org/10.3847/1538-4357/aa74b1
