Correlation between SFR surface density and thermal pressure of ionized gas in local analogs of high-redshift galaxies

Abstract

We explore the relation between the star formation rate surface density ($\Sigma$SFR) and the interstellar gas pressure for nearby compact starburst galaxies. The sample consists of 17 green peas and 19 Lyman break analogs. Green peas are nearby analogs of Ly$\alpha$ emitters at high redshift and Lyman break analogs are nearby analogs of Lyman break galaxies at high redshift. We measure the sizes for green peas using Hubble Space Telescope Cosmic Origins Spectrograph (COS) NUV images with a spatial resolution of $\sim$ 0.05${}^{{}^{\prime \prime }}$. We estimate the gas thermal pressure in HII regions by $P=N_{total}Tk{}_B\simeq 2n_{e}Tk{}_B$. The electron density is derived using the [SII] doublet at 6716,6731 Å, and the temperature is calculated from the [OIII] lines. The correlation is characterized by $\Sigma$ SFR = 2.40$\times$10${}^{-3}$M${}_{\odot }$yr${}^{-1}$kpc${}^{-2}$${\left(\frac{P/k_B}{10^{4}c{m}^{-3}K}\right)}^{1.33}$. Green peas and Lyman break analogs have high $\Sigma$SFR up to 1.2 M${}_{\odot }$yr${}^{-1}$kpc${}^{-2}$ and high thermal pressure in HII region up to P/k${}_B$ $\sim$10${}^{7.2}{\mathrm{K}\mathrm{cm}}^{-3}$. These values are at the highest end of the range seen in nearby starburst galaxies. The high gas pressure and the correlation, are in agreement with those found in star-forming galaxies at z $\sim$ 2.5. These extreme pressures are shown to be responsible for driving galactic winds in nearby starbursts. These outflows may be a crucial in enabling Lyman-$\alpha$ and Lyman-continuum to escape.

arXiv comment16 pages, 6 figures, 1 table; Accepted for publication in ApJ

References in corpus (50)

• The Sloan Digital Sky Survey: Technical Summary
• Star Formation in Galaxies Along the Hubble Sequence
• The Dust Content and Opacity of Actively Star-Forming Galaxies
• The physical properties of star forming galaxies in the low redshift universe
• Star Formation in the Milky Way and Nearby Galaxies
• The Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III
• Cosmological SPH simulations: A hybrid multi-phase model for star formation
• Detailed Decomposition of Galaxy Images. II. Beyond Axisymmetric Models
• The Star Formation Law in Nearby Galaxies on Sub-Kpc Scales
• UV Star Formation Rates in the Local Universe
• Galaxy Zoo : Morphologies derived from visual inspection of galaxies from the Sloan Digital Sky Survey
• A Study of the Gas-Star Formation Relation over Cosmic Time
• Different star formation laws for disks versus starbursts at low and high redshifts
• The Relationship Between Gas Content and Star Formation in Molecule-Rich Spiral Galaxies
• The Role of Pressure in GMC Formation II: The H_2 - Pressure Relation
• Strong Nebular Line Ratios in the Spectra of z~2-3 Star-forming Galaxies: First Results from KBSS-MOSFIRE
• Galaxy Zoo Green Peas: Discovery of A Class of Compact Extremely Star-Forming Galaxies
• The Mass-Metallicity Relation with the Direct Method on Stacked Spectra of SDSS Galaxies
• Theoretical Evolution of Optical Strong Lines across Cosmic Time
• Supernova feedback efficiency and mass loading in the starburst and galactic superwind exemplar M82
• Maximally Star-Forming Galactic Disks I. Starburst Regulation Via Feedback-Driven Turbulence
• The MOSDEF Survey: Electron Density and Ionization Parameter at $z\sim 2.3$
• Ly$\alpha$ emission from Green Peas: the role of circumgalactic gas density, covering, and kinematics
• New insights into the stellar content and physical conditions of star-forming galaxies at z = 2-3 from spectral modelling
• The Star Formation Rate in disk galaxies: thresholds and dependence on gas amount
• Lyman-alpha spectral properties of five newly discovered Lyman continuum emitters
• WHAM Observations of H-Alpha, [S II], and [N II] toward the Orion and Perseus Arms: Probing the Physical Conditions of the Warm Ionized Medium
• Ly$\alpha$ profile, dust, and prediction of Ly$\alpha$ escape fraction in Green Pea Galaxies
• Star formation laws in Luminous Infrared Galaxies. New observational constraints on models
• Metallicities and Physical Conditions in Star-forming Galaxies at z~1.0-1.5
• The Survey for Ionization in Neutral-Gas Galaxies: III. Diffuse, Warm Ionized Medium and Escape of Ionizing Radiation
• The Properties of Ultraviolet-Luminous Galaxies at the Current Epoch
• Rest-Frame Optical Spectra of Three Strongly Lensed Galaxies at z~2
• Regulation of Star Formation Rates in Multiphase Galactic Disks: Numerical Tests of the Thermal/Dynamical Equilibrium Model
• A Multiwavelength Optical Emission Line Survey of Warm Ionized Gas in the Galaxy
• Extended Schmidt Law: Role Of Existing Stars In Current Star Formation
• Physical conditions in the ISM of intensely star-forming galaxies at redshift~2
• The FMOS-COSMOS survey of star-forming galaxies at z~1.6. IV: Excitation state and chemical enrichment of the interstellar medium
• HST morphologies of local Lyman break galaxy analogs I: Evidence for starbursts triggered by merging
• VLT-VIMOS integral field spectroscopy of luminous and ultraluminous infrared galaxies II. Evidence for shock ionization caused by tidal forces in the extra-nuclear regions of interacting and merging LIRGs
• Local Lyman Break Galaxy Analogs: The Impact of Massive Star-forming Clumps on the Interstellar Medium and the Global Structure of Young, Forming Galaxies
• Linking Ly-alpha and Low-Ionization Transitions at Low Optical Depth
• The spatially resolved Kennicutt-Schmidt relation in the HI dominated regions of spiral and dwarf irregular galaxies
• Star formation laws in the Andromeda galaxy: gas, stars, metals and the surface density of star formation
• Local Analogs for High-redshift Galaxies: Resembling the Physical Conditions of the Interstellar Medium in High-redshift Galaxies
• Thermal Pressure in the Cold Neutral Medium of Nearby Galaxies
• The Structure and Morphology of the Ionized Gas in Starburst Galaxies: NGC5253/5236
• A Pressure Anomaly for HII Regions in Irregular Galaxies
• Ly$\alpha$ and UV Sizes of Green Pea Galaxies
• Diffuse Ionized Gas inside the dwarf irregular galaxy NGC 6822

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• The Effects of Stellar Population and Gas Covering Fraction on the Emergent Lyman Alpha Emission of High-Redshift Galaxies
• A JWST/NIRSpec Exploration of the Connection between Ionization Parameter, Electron Density, and Star-Formation-Rate Surface Density in z=2.7-6.3 Galaxies
• Stellar Feedback and Resolved Stellar IFU Spectroscopy in the nearby Spiral Galaxy NGC 300
• The KMOS${}^{3D}$ Survey: Investigating the Origin of the Elevated Electron Densities in Star-Forming Galaxies at $1\lesssim z\lesssim 3$
• The Impact of Star-Formation-Rate Surface Density on the Electron Density and Ionization Parameter of High-Redshift Galaxies
• The Compact UV Size of Green Pea Galaxies As Local Analogs of High-redshift Ly$\alpha$-Emitters
• The evolution of the SFR and Sigma-SFR of galaxies in cosmic morning (4 < z < 10)
• Recovery and analysis of rest-frame UV emission lines in 2052 galaxies observed with MUSE at $1.5<z<6.4$
• The Importance Of Star Formation Intensity In LYα Escape From Green Pea Galaxies And Lyman Break Galaxy Analogs
• The Atomic Gas Mass of Green Pea Galaxies
• A Green Pea starburst arising from a galaxy-galaxy merger
• MUSE view of PDS 456: kpc-scale wind, extended ionized gas and close environment
• [NII] fine-structure emission at 122 and 205um in a galaxy at z=2.6: a globally dense star-forming interstellar medium
• Discovery of Hydrogen Radio Recombination Lines at z=0.89 towards PKS 1830-211