AGN and Dwarf Galaxy Gas Kinematics

Abstract

We present spatially resolved kinematic measurements of stellar and ionized gas components of dwarf galaxies in the stellar mass range $10^{8.5}-10^{10}{M}_{\odot }$, selected from SDSS DR7 and DR8 and followed-up with Keck/LRIS spectroscopy. We study the potential effects of active galactic nuclei (AGN) on galaxy-wide gas kinematics by comparing rotation curves of 26 galaxies containing AGN, and 19 control galaxies with no optical or infrared signs of AGN. We find a strong association between AGN activity and disturbed gas kinematics in the host galaxies. While star forming galaxies in this sample tend to have orderly gas discs that co-rotate with the stars, 73\% of the AGN have disturbed gas. We find five out of 45 galaxies have gaseous components in counter-rotation with their stars, and all galaxies exhibiting counter-rotation contain AGN. Six out of seven isolated galaxies with disturbed ionized gas host AGN. At least three AGN fall clearly below the stellar-halo mass relation, which could be interpreted as evidence for ongoing star formation suppression. Taken together, these results provide new evidence supporting the ability of AGN to influence gas kinematics and suppress star formation in dwarf galaxies. This further demonstrates the importance of including AGN as a feedback mechanism in galaxy formation models in the low-mass regime.

References in corpus (58)

• emcee: The MCMC Hammer
• A Universal Density Profile from Hierarchical Clustering
• The Host Galaxies of AGN
• The Origin of the Mass--Metallicity Relation: Insights from 53,000 Star-Forming Galaxies in the SDSS
• The physical properties of star forming galaxies in the low redshift universe
• Dark Matter Substructure in Galactic Halos
• Where are the missing galactic satellites?
• Theoretical Modeling of Starburst Galaxies
• Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe
• Galactic star formation and accretion histories from matching galaxies to dark matter haloes
• Too big to fail? The puzzling darkness of massive Milky Way subhaloes
• Improving the full spectrum fitting method: accurate convolution with Gauss-Hermite functions
• Properties of galaxies reproduced by a hydrodynamic simulation
• Introducing the Illustris Project: the evolution of galaxy populations across cosmic time
• At the heart of the matter: the origin of bulgeless dwarf galaxies and Dark Matter cores
• Mid-Infrared Selection of AGN with the Wide-Field Infrared Survey Explorer. I. Characterizing WISE-Selected AGN in COSMOS
• Observational and Theoretical Constraints on Singular Dark Matter Halos
• The Core-Cusp Problem
• Cosmological Simulations with Self-Interacting Dark Matter I: Constant Density Cores and Substructure
• Reconciling dwarf galaxies with LCDM cosmology: Simulating a realistic population of satellites around a Milky Way-mass galaxy
• Dwarf Galaxies with Optical Signatures of Active Massive Black Holes
• The properties of warm dark matter haloes
• The unexpected diversity of dwarf galaxy rotation curves
• A Stellar Mass Threshold for Quenching of Field Galaxies
• Starburst-driven galactic winds: I. Energetics and intrinsic X-ray emission
• High-resolution mass models of dwarf galaxies from LITTLE THINGS
• High-Resolution Measurements of the Halos of Four Dark Matter-Dominated Galaxies: Deviations from a Universal Density Profile
• Properties of spherical galaxies and clusters with an NFW density profile
• The Impact of Star Formation on the Interstellar Medium in Dwarf Galaxies: II. The Formation of Galactic Winds
• The central slope of dark matter cores in dwarf galaxies: Simulations vs. THINGS
• Strongly star forming galaxies in the local Universe with nebular He II 4686 emission
• The importance of tides for the Local Group dwarf spheroidals
• Galaxy luminosities, stellar masses, sizes, velocity dispersions as a function of morphological type
• Cusp-core transformations induced by AGN feedback in the progenitors of cluster galaxies
• Black Holes at the Centers of Nearby Dwarf Galaxies
• The search for active black holes in nearby low-mass galaxies using optical and mid-IR data
• SDSS-IV MaNGA: Evidence of the importance of AGN feedback in low-mass galaxies
• Supernova-driven winds in simulated dwarf galaxies
• Baryonic clues to the puzzling diversity of dwarf galaxy rotation curves
• Formation of Massive Counterrotating Disks in Spiral Galaxies
• The correlation of line strength with luminosity and redshift from composite QSO spectra
• A search for optical AGN variability in 35,000 low-mass galaxies with the Palomar Transient Factory
• Multi-epoch Spectroscopy of Dwarf Galaxies with AGN Signatures: Identifying Sources with Persistent Broad H-alpha Emission
• X-ray Detected AGN in SDSS Dwarf Galaxies
• How to Quench a Dwarf Galaxy: The Impact of Inhomogeneous Reionization on Dwarf Galaxies and Cosmic Filaments
• AGN-Driven Outflows in Dwarf Galaxies
• Stellar Radiation is Critical for Regulating Star Formation and Driving Outflows in Low Mass Dwarf Galaxies
• AGN in dwarf galaxies: frequency, triggering processes and the plausibility of AGN feedback
• The Limitations of Optical Spectroscopic Diagnostics in Identifying AGNs in the Low Mass Regime
• Exploring the limits of AGN feedback: black holes and the star formation histories of low-mass galaxies
• Star Forming Galaxies as AGN Imposters? A Theoretical Investigation of the Mid-infrared Colors of AGNs and Extreme Starbursts
• The Effect of AGN on the Global HI Content of Isolated Low-Mass Galaxies
• On the origin of star-gas counterrotation in low-mass galaxies
• AGN All the Way Down? AGN-like Line Ratios are Common In the Lowest-Mass Isolated Quiescent Galaxies
• Decoupled gas kinematics in isolated S0 galaxies
• Implications for the origin of early-type dwarf galaxies --- the discovery of rotation in isolated, low-mass early-type galaxies
• A counter-rotating core in the dwarf elliptical galaxy VCC 510
• Environments of dwarf galaxies with optical AGN characteristics

Cited by in corpus (14)

• Overmassive black holes in dwarf galaxies out to z$\sim$0.9 in the VIPERS survey
• Integral-Field Spectroscopy of Fast Outflows in Dwarf Galaxies with AGN
• Near-Infrared Coronal Line Observations of Dwarf Galaxies hosting AGN-driven Outflows
• Population statistics of intermediate mass black holes in dwarf galaxies using the NewHorizon simulation
• The environment of AGN dwarf galaxies at z$\sim$0.7 from the VIPERS survey
• The diversity of spiral galaxies explained
• Merger Histories and Environments of Dwarf AGN in IllustrisTNG
• Diverse dark matter profiles in FIRE dwarfs: black holes, cosmic rays and the cusp-core enigma
• An Escaping Outflow in a Galaxy with an Intermediate-mass Black Hole
• MaNGA AGN dwarf galaxies (MAD). III. The role of mergers and environment in active galactic nucleus activity in dwarf galaxies
• The incidence of X-ray AGN and non-AGN galaxies in the far-infrared: insights into host galaxy properties and AGN obscuration
• Dynamical disequilibrium in dwarf galaxies: rethinking gas dynamics, rotation curves, and dark matter inference
• MaNGA AGN dwarf galaxies (MAD) -- IV. Revealing hidden AGN in dwarf galaxies with radio observations
• Fueling, Evolution, and Diversity of AGN in Dwarf Galaxies: Insights from Star Formation and Black Hole Scaling Relations