Photometric Mass Estimation and the Stellar Mass-Halo Mass Relation for Low Mass Galaxies

Abstract

We present a photometric halo mass estimation technique for local galaxies that enables us to establish the stellar mass-halo mass (SMHM) relation down to stellar masses of 10${}^5$ M${}_{\odot }$. We find no detectable differences among the SMHM relations of four local galaxy clusters or between the cluster and field relations and we find agreement with extrapolations of previous SMHM relations derived using abundance matching approaches. We fit a power law to our empirical SMHM relation and find that for adopted NFW dark matter profiles and for M${}_{\ast }<10^9$ M${}_{\odot }$, the halo mass is M${}_h=10^{10.35\pm 0.02}({\mathrm{M}}_{\ast }/10^8{\mathrm{M}}_{\odot }{)}^{0.63\pm 0.02}$. The normalisation of this relation is susceptible to systematic modelling errors that depend on the adopted dark matter potential and the quoted uncertainties refer to the uncertainties in the median relation. For galaxies with M${}_{\ast }<10^9$ M${}_{\odot }$ that satisfy our selection criteria, the scatter about the fit in $M_h$, including uncertainties arising from our methodology, is 0.3 dex. Finally, we place lower luminosity Local Group galaxies on the SMHM relationship using the same technique, extending it to M${}_{\ast }\sim 10^3$ M${}_{\odot }$ and suggest that some of these galaxies show evidence for additional mass interior to the effective radius beyond that provided by the standard dark matter profile. If this mass is in the form of a central black hole, the black hole masses are in the range of intermediate mass black holes, $10^{(5.7\pm 0.6)}$ M${}_{\odot }$, which corresponds to masses of a few percent of M${}_h$, well above values extrapolated from the relationships describing more massive galaxies.

Accepted for publication in MNRAS; 13 pages

References in corpus (29)

• galpy: A Python Library for Galactic Dynamics
• The Kinematics of the Ultra-Faint Milky Way Satellites: Solving the Missing Satellite Problem
• The Baryon Content of Extremely Low Mass Dwarf Galaxies
• Color--Mass-to-Light Ratio Relations for Disk Galaxies
• The stellar mass-halo mass relation of isolated field dwarfs: a critical test of $\Lambda$CDM at the edge of galaxy formation
• A Survey of Galaxy Kinematics to z ~ 1 in the TKRS/GOODS-N Field. I. Rotation and Dispersion Properties
• The Nature of UCDs: Internal Dynamics from an Expanded Sample and Homogeneous Database
• Extensive Globular Cluster Systems Associated with Ultra Diffuse Galaxies in the Coma Cluster
• A spectroscopic confirmation of the Bootes II dwarf spheroidal
• Uniting Old Stellar Systems: From Globular Clusters to Giant Ellipticals
• ELVES I: Structures of Dwarf Satellites of MW-like Galaxies; Morphology, Scaling Relations, and Intrinsic Shapes
• Kinematics of Antlia 2 and Crater 2 from The Southern Stellar Stream Spectroscopic Survey (S5)
• The Fornax Deep Survey (FDS) with VST. VI. Optical properties of the dwarf galaxies in the Fornax cluster
• An extended halo around an ancient dwarf galaxy
• On Kinematic Substructure in the Sextans Dwarf Spheroidal Galaxy
• Toward Equations of Galactic Structure
• Kinematics and Stellar Populations of Low-Luminosity Early-Type Galaxies in the Abell 496 Cluster
• Extreme chemical abundance ratio suggesting an exotic origin for an ultra-diffuse galaxy
• Dwarf Galaxy Discoveries from the KMTNet Supernova Program I. The NGC 2784 Galaxy Group
• The Mass of the Milky Way from the H3 Survey
• VLT Spectroscopy of Ultra-Faint Dwarf Galaxies. 1. Boötes I, Leo IV, Leo V
• Dynamical evidence for a strong tidal interaction between the Milky Way and its satellite, Leo V
• A Photometric and Kinematic Analysis of UDG1137+16 (dw1137+16): Probing Ultra-Diffuse Galaxy Formation in a Group Environment
• Local Group Dwarf Galaxies and the Fundamental Manifold of Spheroids
• Galaxy populations in the Hydra I cluster from the VEGAS survey I. Optical properties of a large sample of dwarf galaxies
• The Next Generation Virgo Cluster Survey. IX. Estimating the Efficiency of Galaxy Formation on the Lowest-Mass Scales
• Tracing stars in Milky Way satellites with A-SLOTH
• Dwarf Galaxy Discoveries from the KMTNet Supernova Program II. The NGC 3585 Group and Its Dynamical State
• Galactic tides and the Crater II dwarf spheroidal: a challenge to LCDM?

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