Kinematics of Haro11 - the miniature Antennae

Abstract

(abridged) Luminous blue compact galaxies are among the most active galaxies in the local universe in terms of their star formation rate per unit mass. They may be seen as the local analogs of higher redshift Lyman Break Galaxies. Studies of their kinematics is key to understanding what triggers their unusually active star formation In this work we investigate the kinematics of stars and ionised gas in Haro11, one of the most luminous blue compact galaxies in the local universe. Previous works have indicated that many such galaxies may be triggered by galaxy mergers. We have employed Fabry-Perot interferometry, long-slit spectroscopy and Integral Field Unit (IFU) spectroscopy to explore the kinematics of Haro11. We target the near infrared Calcium triplet to derive the stellar velocity field and velocity dispersion. Ionised gas is analysed through emission lines from hydrogen, [OIII] , and [SIII]. When spectral resolution and signal to noise allows we investigate the the line profile in detail and identify multiple velocity components when present. We find that to first order, the velocity field and velocity dispersions derived from stars and ionised gas agree. Hence the complexities reveal real dynamical disturbances providing further evidence for a merger in Haro11. Through decomposition of emission lines we find evidence for kinematically distinct components, for instance a tidal arm behind the galaxy. The ionised gas velocity field can be traced to large galactocentric radii, and shows significant velocity dispersion even far out in the halo. We discuss the origin of the line width, and interpreted as virial motions it indicates a mass of ~1E11 M_sun. Morphologically and kinematically Haro11 shows many resemblances with the famous Antennae galaxies, but is much denser which is the likely explanation for the higher star formation efficiency in Haro11.

accepted for publication in A&A

References in corpus (14)

• The KMOS^3D Survey: design, first results, and the evolution of galaxy kinematics from 0.7<z<2.7
• The long lives of giant clumps and the birth of outflows in gas-rich galaxies at high redshift
• Star Cluster Demographics. I. A General Framework and Application to the Antennae Galaxies
• High star formation rates as the origin of turbulence in early and modern disk galaxies
• HST morphologies of local Lyman break galaxy analogs I: Evidence for starbursts triggered by merging
• The Diverse Properties of the Most Ultraviolet Luminous Galaxies Discovered by the Galaxy Evolution Explorer
• Feedback in the local LBG Analog Haro 11 as probed by far-UV and X-ray observations
• The escape of Lyman photons from a young starburst: the case of Haro 11
• Far-Ultraviolet & X-ray Observations of VV 114: Feedback in a Local Analog to Lyman Break Galaxies
• The Stellar and Gas Kinematics of the LITTLE THINGS Dwarf Irregular Galaxy NGC 1569
• 3D spectroscopy with VLT/GIRAFFE - II: Are Luminous Compact Galaxies merger remnants ?
• Dynamical masses of two young globular clusters in the blue compact galaxy ESO 338-IG04
• Stellar dynamics of blue compact galaxies. II. Further indications of a merger in ESO 338-IG04
• Star-gas decoupling and a non-rotating stellar core in He 2-10: Integral field spectroscopy with FLAMES/ARGUS

Cited by in corpus (31)

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• HST Imaging of the Ionizing Radiation from a Star-forming Galaxy at z = 3.794
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• Local anti-correlation between star-formation rate and gas-phase metallicity in disk galaxies
• Star-formation driven outflows in local dwarf galaxies as revealed from [CII] observations by Herschel
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• The 300 pc resolution imaging of a z = 8.31 galaxy: Turbulent ionized gas and potential stellar feedback 600 million years after the Big Bang
• An IFU investigation of possible Lyman continuum escape from Mrk 71/NGC 2366
• Ionized gas properties of the extreme starburst galaxy Haro 11. Temperature and metal abundance discrepancies
• A bottom-up search for Lyman-continuum leakage in the Hubble Ultra Deep Field
• The molecular gas resolved by ALMA in the low-metallicity dwarf merging galaxy Haro 11
• Detection of HI in Emission in the Lyman Alpha Emitting Galaxy Haro 11
• Enhanced X-ray emission from candidate Lyman continuum emitting galaxies
• Resolving the Ultra-Luminous X-ray Sources in the Ly$\alpha$ Emitting Galaxy Haro 11
• Spatially resolved gas and stellar kinematics in compact starburst galaxies
• Physical and kinematic conditions of the local merging galaxy NGC 1487
• Spatially resolved CIII]$\lambda$1909 emission in Haro 11
• The leakage of Lyman-continuum photons from a major merger at $z\sim 1$
• Low-Frequency Turnover Star Forming Galaxies I: Radio Continuum Observations and Global Properties
• Disentangling the X-ray variability in the Lyman continuum emitter Haro 11
• Time-average properties of $z\sim 0.6$ major mergers: mergers significantly scatter high-z scaling relations
• Forming the local starburst galaxy Haro 11 through hydrodynamical merger simulations
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