J1154+2443: a low-redshift compact star-forming galaxy with a 46 per cent leakage of Lyman continuum photons

Abstract

We report the detection of the Lyman continuum (LyC) radiation of the compact star-forming galaxy (SFG) J1154+2443 observed with the Cosmic Origins Spectrograph (COS) onboard the Hubble Space Telescope. This galaxy, at a redshift of z=0.3690, is characterized by a high emission-line flux ratio O32=[OIII]5007/[OII]3727=11.5. The escape fraction of the LyC radiation fesc(LyC) in this galaxy is 46 per cent, the highest value found so far in low-redshift SFGs and one of the highest values found in galaxies at any redshift. The narrow double-peaked Lya emission line is detected in the spectrum of J1154+2443 with a separation between the peaks Vsep of 199 km/s, one of the lowest known for Lya-emitting galaxies, implying a high fesc(Lya). Comparing the extinction-corrected Lya/Hb flux ratio with the case B value we find fesc(Lya) = 98 per cent. Our observations, combined with previous detections in the literature, reveal an increase of O32 with increasing fesc(LyC). We also find a tight anticorrelation between fesc(LyC) and Vsep. The surface brightness profile derived from the COS acquisition image reveals a bright star-forming region in the centre and an exponential disc in the outskirts with a disc scale length alpha=1.09 kpc. J1154+2443, compared to other known low-redshift LyC leakers, is characterized by the lowest metallicity, 12+logO/H=7.65+/-0.01, the lowest stellar mass M*=10^8.20 Msun, a similar star formation rate SFR=18.9 Msun/yr and a high specific SFR of 1.2x10^-7 yr^-1.

16 pages, 8 figures, accepted for publication in MNRAS. arXiv admin note: text overlap with arXiv:1605.05160

References in corpus (15)

• Cosmic Reionization and Early Star-Forming Galaxies: A Joint Analysis of New Constraints from Planck and Hubble Space Telescope
• The 2013 Release of Cloudy
• The Effects of Stellar Rotation. II. A Comprehensive Set of Starburst99 Models
• Using Lyman-alpha to detect galaxies that leak Lyman continuum
• Lyman-alpha spectral properties of five newly discovered Lyman continuum emitters
• A Local Clue to the Reionization of the Universe
• Q1549-C25: A Clean Source of Lyman-Continuum Emission at $z=3.15$
• Excitation properties of galaxies with the highest [OIII]/[OII] ratios: No evidence for massive escape of ionizing photons
• Linking Ly-alpha and Low-Ionization Transitions at Low Optical Depth
• Peering through the holes: the far UV color of star-forming galaxies at z~3-4 and the escaping fraction of ionizing radiation
• Do galaxies that leak ionizing photons have extreme outflows?
• On the UV compactness and morphologies of typical Lyman-a emitters from z~2 to z~6
• Confirmation of a Steep Luminosity Function for Lyman-alpha Emitters at z = 5.7: A Major Component of Reionization
• GALEX Diffuse Observations of the Sky: The Data
• The interstellar medium in high-redshift submillimeter galaxies as probed by infrared spectroscopy

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