Local galaxy flows within 5 Mpc

Abstract

We present Hubble Space Telescope/WFPC2 images of sixteen dwarf galaxies as part of our snapshot survey of nearby galaxy candidates. We derive their distances from the luminosity of the tip of the red giant branch stars with a typical accuracy of ~12%. The resulting distances are 4.26 Mpc (KKH 5), 4.74 Mpc (KK 16), 4.72 Mpc (KK 17), 4.66 Mpc (ESO 115-021), 4.43 Mpc (KKH 18), 3.98 Mpc (KK 27), 4.61 Mpc (KKH 34), 4.99 Mpc (KK 54), 4.23 Mpc (ESO 490-017), 4.90 Mpc (FG 202), 5.22 Mpc (UGC 3755), 5.18 Mpc (UGC 3974), 4.51 Mpc (KK 65), 5.49 Mpc (UGC 4115), 3.78 Mpc (NGC 2915), and 5.27 Mpc (NGC 6503). Based on distances and radial velocities of 156 nearby galaxies, we plot the local velocity-distance relation, which has a slope of H_0 = 73 km/(c * Mpc) and a radial velocity dispersion of 85 km/s. When members of the M81 and CenA groups are removed, and distance errors are taken into account, the radial velocity dispersion drops to sigma_v=41 km/s. The local Hubble flow within 5 Mpc exibits a significant anisotropy, with two infall peculiar velocity regions directed towards the Supergalactic poles. However, two observed regions of outflow peculiar velocity, situated on the Supergalactic equator, are far away (~50 degr.) from the Virgo/anti-Virgo direction, which disagrees with a spherically symmetric Virgo-centric flow. About 63% of galaxies within 5 Mpc belong to known compact and loose groups. Apart from them, we found six new probable groups, consisting entirely of dwarf galaxies.

22 pages, 7 figures. A&A Accepted. High resolution Figures 1 and 2 (9616k) are available at http://www.sao.ru/~sme/figs.tar.gz

References in corpus (22)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• WFPC2 Stellar Photometry with HSTphot
• The SBF Survey of Galaxy Distances. II. Local and Large-Scale Flows
• The Charge Transfer Efficiency and Calibration of WFPC2
• The HST Key Project on the Extragalactic Distance Scale XXVI. The Calibration of Population II Secondary Distance Indicators and the Value of the Hubble Constant
• Deviations from the Local Hubble Flow. I. The Tip of the Red Giant Branch as a Distance Indicator
• A step toward the calibration of the RGB Tip as a Standard Candle
• Squelched Galaxies and Dark Halos
• The very local Hubble flow
• SBF Distances to Dwarf Elliptical Galaxies in the Sculptor Group
• The "Tip" of the Red Giant Branch as a distance indicator: results from evolutionary models
• The Resolved Stellar Population of the Post-Starburst Galaxy NGC 1569
• The Local Group as a test of cosmological models
• The Resolved Stellar Populations in NGC 1705
• Detection of the Red Giant Branch Stars in M82 Using the Hubble Space Telescope
• Testing the Surface Brightness Fluctuations Method for Dwarf Elliptical Galaxies in the Centaurus A Group
• The Shape and Figure Rotation of NGC 2915's Dark Halo
• The local Hubble flow: a manifestation of dark energy
• Tip of the Red Giant Branch Distances to NGC 4214, UGC 685, and UGC 5456
• DDO 187: Do dwarf galaxies have extended halos?
• The Stellar Content and Distance of UGC 4483
• A new galaxy near the Local Group in Draco

Cited by in corpus (108)

• The GALEX Ultraviolet Atlas of Nearby Galaxies
• Cosmicflows-2: The Data
• Optical Spectroscopy and Nebular Oxygen Abundances of the Spitzer/SINGS Galaxies
• The 1000 Brightest HIPASS Galaxies: HI Properties
• The Baryonic Tully-Fisher Relation of Galaxies with Extended Rotation Curves and the Stellar Mass of Rotating Galaxies
• An H-alpha Imaging Survey of Galaxies in the Local 11 Mpc Volume
• KINGFISH -- Key Insights on Nearby Galaxies: A Far-Infrared Survey with Herschel: Survey Description and Image Atlas
• Calibration of the Tip of the Red Giant Branch (TRGB)
• Little Things
• Our Peculiar Motion Away from the Local Void
• Direct Oxygen Abundances for Low Luminosity LVL Galaxies
• Oxygen and nitrogen abundances in nearby galaxies. Correlations between oxygen abundance and macroscopic properties
• Bulgeless Giant Galaxies Challenge our Picture of Galaxy Formation by Hierarchical Clustering
• Star Formation Properties of a Large Sample of Irregular Galaxies
• Distances to Nearby Galaxies in Sculptor
• The Local Group and other neighboring galaxy groups
• Broad-Band Imaging of a Large Sample of Irregular Galaxies
• The Cepheid Distance to NGC 5236 (M 83) with the VLT
• The Search for Failed Supernovae with The Large Binocular Telescope: First Candidates
• Associations of Dwarf Galaxies
• Cosmic flow from 2MASS redshift survey: The origin of CMB dipole and implications for LCDM cosmology
• ACS imaging of 25 galaxies in nearby groups and in the field
• Constrained Simulations of the Real Universe: the Local Supercluster
• The AMIGA project. I. Optical characterization of the CIG catalog
• Chandra Survey of Nearby Highly-Inclined Disk Galaxies I: X-ray Measurements of Galactic Coronae
• The Search for Failed Supernovae with the Large Binocular Telescope: Constraints from 7 Years of Data
• Connecting Far-Infrared and Radio Morphologies of Disk Galaxies: Cosmic-Ray Electron Diffusion After Star Formation Episodes
• An Ultraviolet Spectroscopic Atlas of Local Starbursts and Star-Forming Galaxies: The Legacy of FOS and GHRS
• The baryonic Tully-Fisher relation and its implication for dark matter halos
• Nebular Abundances of Nearby Southern Dwarf Galaxies
• The Local Volume HI Survey (LVHIS)
• The emptiness of voids: yet another over-abundance problem for the LCDM model
• Dust and Atomic Gas in Dwarf Irregular Galaxies of the M81 Group: The SINGS and THINGS view
• The Incidence of Highly-Obscured Star-Forming Regions in SINGS Galaxies
• Discovery of Eight New Extremely Metal--Poor Galaxies in the Sloan Digital Sky Survey
• Infall of nearby galaxies into the Virgo cluster as traced with HST
• Evaluating backreaction with the peak model of structure formation
• Photometric properties of Local Volume dwarf galaxies
• The Distance to M51
• The Anisotropic Distribution of Satellite Galaxies
• The search for failed supernovae with the Large Binocular Telescope: a new candidate and the failed SN fraction with 11 yr of data
• On the mass of the Local Group
• The Velocity Field of the Local Universe from Measurements of Type Ia Supernovae
• Surface Brightness Profiles of Dwarf Galaxies: I. Profiles and Statistics
• SN 1993J VLBI (IV): A Geometric Determination of the Distance to M81 with the Expanding Shock Front Method
• The signature of dark energy on the local Hubble flow
• A Council of Giants
• Towards understanding the structure of voids in the cosmic web
• Infrared Properties of Star Forming Dwarf Galaxies: I. Dwarf Irregular Galaxies in the Local Volume
• The quiescent Hubble flow, local dark energy tests, and pairwise velocity dispersion in a $\Omega =1$ universe
• Evolution of dwarf galaxies: a dynamical perspective
• The very local Hubble flow: computer simulations of dynamical history
• Aperture Synthesis Observations of the Nearby Spiral NGC 6503: Modeling the Thin and Thick HI Disks
• The Cosmological Mean Density and its Local Variations Probed by Peculiar Velocities
• The globular cluster system of the Milky Way: accretion in a cosmological context
• The Arecibo Legacy Fast ALFA Survey: V. HI Source Catalog of the Anti-Virgo Region at dec=27 degrees
• A close look at the Centaurus A group of galaxies: I. Metallicity distribution functions and population gradients in early-type dwarfs
• X-ray observations of the edge-on star-forming galaxy NGC891 and its supernova SN1986J
• More galaxies in the Local Volume imaged in H-alpha
• Pecular velocities of galaxies in the Leo Spur
• Non-Friedmann cosmology for the Local Universe, significance of the universal Hubble constant and short-distance indicators of dark energy
• Light to Mass Variations with Environment
• Distance Determinations to SHIELD Galaxies from HST Imaging
• The Minimum Amount of Stars a Galaxy Will Form
• Discovery of a Solitaire Dwarf Galaxy in the APPLES Survey
• Interstellar Medium Oxygen Abundances of Dwarf Irregular Galaxies in Centaurus A and Nearby Groups
• The Sheet of Giants: Unusual Properties of the Milky Way's Immediate Neighbourhood
• Exploring the nature of dark matter with the extreme galaxy AGC 114905
• Fundamentals of the Dwarf Fundamental Plane
• Dark energy domination in the Virgocentric flow
• Giant Galaxies, Dwarfs, and Debris Survey. I. Dwarf Galaxies and Tidal Features Around NGC 7331
• Peculiar Velocities of Galaxies Just Beyond the Local Group
• Constrained simulations of the local universe: II. The nature of the local Hubble flow
• Star formation history of KDG 61 and KDG 64 from spectroscopy and colour-magnitude diagrams
• The origin of HI-deficiency in galaxies on the outskirts of the Virgo cluster. II. Companions and uncertainties in distances and deficiencies
• Optical supernova remnants in nearby galaxies and their influence on star formation rates derived from H$\alpha$ emission
• Emission spectrum of ionized gas in the Irr galaxy Holmberg II
• Deep Near-Infrared Surface Photometry and Properties of Local Volume Dwarf Irregular Galaxies
• Local dark energy: HST evidence from the vicinity of the M 81/M 82 galaxy group
• Enhanced prospects for direct detection of inelastic dark matter from a non-galactic diffuse component
• Color, Structure, and Star Formation History of Dwarf Galaxies over the last ~3 Gyr with GEMS and SDSS
• Transition of an X-ray binary to the hard ultraluminous state in the blue compact dwarf galaxy VII Zw 403
• Dark energy domination in the local flow of giant galaxies
• Light and Motion in the Local Volume
• The Unusual Milky Way-Local Sheet System: Implications for Spin Strength and Alignment
• Formation of the large-scale structure of the Universe
• Uneven flows: On cosmic bulk flows, local observers, and gravity
• The Distance to the Galaxy Coma P
• Finding gas-rich dwarf galaxies betrayed by their ultraviolet emission
• Anomalous Evolution of the Dwarf Galaxy HIPASS J1321-31
• Discovery of Globular Clusters in the Proto-Spiral NGC2915: Implications for Hierarchical Galaxy Evolution
• Discovery of New Dwarf Galaxy near The Isolated Spiral Galaxy NGC 6503
• Local Group(s)
• On the coldness of the local Hubble flow: the role of baryons
• Local dark energy: HST evidence from the expansion flow around Cen A/M83 galaxy group
• Search for ultra high energy cosmic rays from radiogalaxy Virgo A
• The Ups and Downs of the Hubble Constant
• KKH 22, the first dwarf spheroidal satellite of IC 342
• Evidence for a Strong End-On Bar in the Ringed Sigma-Drop Galaxy NGC 6503
• Galaxy groups in the presence of Cosmological Constant: Increasing the Masses of Groups
• The disk averaged star formation relation for Local Volume dwarf galaxies
• Star formation in bulgeless late type galaxies: clues to their evolution
• Devouring The Centaurus A Satellites: Modeling Dwarf Galaxies with Galacticus
• The Local Velocity Anomaly
• The mass distribution in and around the Local Group
• Light on Dark Matter
• Dark matter accretion wakes of high-redshift black holes
• The evolution of star clusters: The resolved-star approach