A Comparison of Outflow Properties in AGN Dwarfs vs. Star Forming Dwarfs
arXiv:2304.04737 · doi:10.3847/1538-4357/acca7c
Abstract
Feedback likely plays a crucial role in resolving discrepancies between observed and theoretical predictions of dwarf galaxy properties. Stellar feedback was once believed to be sufficient to explain these discrepancies, but it has thus far failed to fully reconcile theory and observations. The recent discovery of energetic galaxy-wide outflows in dwarf galaxies hosting Active Galactic Nuclei (AGN) suggests that AGN feedback may have a larger role in the evolution of dwarf galaxies than previously suspected. In order to assess the relative importance of stellar versus AGN feedback in these galaxies, we perform a detailed Keck/KCWI optical integral field spectroscopic study of a sample of low-redshift star-forming (SF) dwarf galaxies that show outflows in ionized gas in their SDSS spectra. We characterize the outflows and compare them to observations of AGN-driven outflows in dwarfs. We find that SF dwarfs have outflow components that have comparable widths (W) to those of outflows in AGN dwarfs, but are much less blue-shifted, indicating that SF dwarfs have significantly slower outflows than their AGN counterparts. The outflows in SF dwarfs are spatially resolved and significantly more extended than those in AGN dwarfs. The mass loss rates, momentum and energy rates of SF-driven outflows are much lower than those of AGN-driven outflows. Our results indicate that AGN feedback in the form of gas outflows may play an important role in dwarf galaxies and should be considered along with SF feedback in models of dwarf galaxy evolution.
arXiv comment27 pages, 25 figures, Accepted for publication in ApJ
References in corpus (54)
- Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
- Astropy: A Community Python Package for Astronomy
- The Structure of Cold Dark Matter Halos
- The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
- Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
- 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
- Stellar Masses and Star Formation Histories for 10^5 Galaxies from the Sloan Digital Sky Survey
- Parametric Recovery of Line-of-Sight Velocity Distributions from Absorption-Line Spectra of Galaxies via Penalized Likelihood
- 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
- Adaptive spatial binning of integral-field spectroscopic data using Voronoi tessellations
- The Milky Way's bright satellites as an apparent failure of LCDM
- Observational evidence for AGN feedback in early-type galaxies
- The Green Valley is a Red Herring: Galaxy Zoo reveals two evolutionary pathways towards quenching of star formation in early- and late-type galaxies
- The Illustris simulation: the evolving population of black holes across cosmic time
- The APOSTLE simulations: solutions to the Local Group's cosmic puzzles
- Dwarf Galaxies with Optical Signatures of Active Massive Black Holes
- Kiloparsec-scale outflows are prevalent among luminous AGN: outflows and feedback in the context of the overall AGN population
- Cool Outflows in Galaxies and their Implications
- [OII] as a Star Formation Rate Indicator
- A New Sample of Low-mass Black Holes in Active Galaxies
- Evolutionary Stellar Population Synthesis at High Spectral Resolution: Optical Wavelengths
- The Multiphase Structure and Power Sources of Galactic Winds in Major Mergers
- The MOSDEF Survey: Electron Density and Ionization Parameter at
- The Ultraviolet-Optical Color-Magnitude Diagram III: Constraints on Evolution from the Blue to Red Sequence
- The Keck Cosmic Web Imager Integral Field Spectrograph
- Galaxy Zoo: The fundamentally different co-evolution of supermassive black holes and their early- and late-type host galaxies
- SDSS-IV MaNGA: Evidence of the importance of AGN feedback in low-mass galaxies
- A Keck/HIRES Study of Kinematics of the Cold Interstellar Medium in Dwarf Starburst Galaxies
- Hidden AGN in dwarf galaxies revealed by MaNGA: light echoes, off-nuclear wanderers, and a new broad-line AGN
- Kiloparsec Scale Properties of Star-Formation Driven Outflows at z~2.3 in the SINS/zC-SINF AO Survey
- Breaking the Obscuring Screen: A Resolved Molecular Outflow in a Buried QSO
- AGN-Driven Outflows in Dwarf Galaxies
- AGN feedback in dwarf galaxies?
- A little FABLE: exploring AGN feedback in dwarf galaxies with cosmological simulations
- A Sample of Massive Black Holes in Dwarf Galaxies Detected via [Fe X] Coronal Line Emission: Active Galactic Nuclei and/or Tidal Disruption Events
- Shaken, not blown: the gentle baryonic feedback of nearby starburst dwarf galaxies
- Bayesian AGN Decomposition Analysis for SDSS Spectra: A Correlation Analysis of [OIII] Outflow Kinematics with AGN and Host Galaxy Properties
- Light breeze in the local Universe
- Spatially Extended NaI D Resonant Emission and Absorption in the Galactic Wind of the Nearby Infrared-Luminous Quasar F05189-2524
- A kinematic study of the irregular dwarf galaxy NGC 2366 using HI and Halpha observations
- The core-cusp problem in cold dark matter halos and supernova feedback: Effects of Mass Loss
- Integral-Field Spectroscopy of Fast Outflows in Dwarf Galaxies with AGN
- A near-infrared study of the multi-phase outflow in the type-2 quasar J1509+0434
- The Complex Structure of the Multi-Phase Galactic Wind in a Starburst Merger
- A kinematic study of the neutral and ionised gas in the irregular dwarf galaxies IC 4662 and NGC 5408
- Half-Megasecond Chandra Spectral Imaging of the Hot Circumgalactic Nebula around Quasar Mrk 231
- Quasars Probing Quasars IX. The Kinematics of the Circumgalactic Medium Surrounding z ~ 2 Quasars
- The Point Spread Function Reconstruction by Using Moffatlets - I
- Galaxy Pairs in the Sloan Digital Sky Survey XV: Properties of Ionised Outflows