期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 498, 期 4, 页码 5885-5903出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/staa2716
关键词
Galaxy kinematics and dynamics; Galaxy stellar content; Galaxy structure
资金
- European Southen Observatory telescopes at the La Silla Paranal Observatory [0101.B-0505(A), 0101.B-0505(B), 0101.B-05050(C)]
- Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) [CE170100013]
- Australia Government Research Training Program Scholarship
- H2020 ERC Consolidator Grant [683184]
- Australian Research Council Future Fellowship - Australian Government [FT180100066]
- Australian Research Council Centre of Excellence for All-skyAstrophysics (CAASTRO) [CE110001020]
- American Museum of Natural History
- Astrophysical Institute Potsdam
- University of Basel
- University of Cambridge
- Case Western Reserve University
- University of Chicago
- Institute for Advanced Study
- Japan Participation Group
- Johns Hopkins University
- Joint Institute for Nuclear Astrophysics
- Kavli Institute for Particle Astrophysics and Cosmology
- Korean Scientist Group
- Chinese Academy of Sciences (The Large Sky Area Multi-Object Fibre Spectroscopic Telescope, LAMOST)
- Los Alamos National Laboratory
- Max-Planck-Institute for Astronomy (MPIA)
- Max-Planck-Institute for Astrophysics (MPA)
- New Mexico State University
- Ohio State University
- University of Pittsburgh
- University of Portsmouth
- Princeton University
- United States Naval Observatory
- University of Washington
- Drexel University
- Fermilab
- Alfred P. Sloan Foundation
- National Science Foundation
- U.S. Department of Energy
- National Aeronautics and Space Administration
- Japanese Monbukagakusho
- Max Planck Society
- Higher Education Funding Council for England
The Study of H alpha from Dwarf Emissions (SH alpha DE) is a high spectral resolution (R = 13 500) Ha integral field survey of 69 dwarf galaxies with stellar masses 10(6) < M-star < 10(9) M-circle dot. The survey used FLAMES on the ESO Very Large Telescope. SH alpha DE is designed to study the kinematics and stellar populations of dwarf galaxies using consistent methods applied to massive galaxies and at matching level of detail, connecting these mass ranges in an unbiased way. In this paper, we set out the science goals of SH alpha DE, describe the sample properties, outline the data reduction, and analysis processes. We investigate the log M-star-log S-0.5 mass-kinematics scaling relation, which has previously shown potential for combining galaxies of all morphologies in a single scaling relation. We extend the scaling relation from massive galaxies to dwarf galaxies, demonstrating this relation is linear down to a stellar mass of M-star similar to 10(8.6) M-circle dot. Below this limit, the kinematics of galaxies inside one effective radius appears to be dominated by the internal velocity dispersion limit of the H alpha-emitting gas, giving a bend in the log M-star-log S-0.5 relation. Replacing stellar mass with total baryonic mass using gas mass estimate reduces the severity but does not remove the linearity limit of the scaling relation. An extrapolation to estimate the galaxies' dark matter halo masses, yields a logM(h)-log S-0.5 scaling relation that is free of any bend, has reduced curvature over the whole mass range, and brings galaxies of all masses and morphologies on to the virial relation.
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