Limits on Lyman Continuum escape from z=2.2 H-alpha emitting galaxies

@article{Sandberg2015LimitsOL,
  title={Limits on Lyman Continuum escape from z=2.2 H-alpha emitting galaxies},
  author={Andreas Sandberg and Goran Ostlin and Jens Melinder and Arjan Bik and L Guaita},
  journal={arXiv: Astrophysics of Galaxies},
  year={2015}
}
The leakage of Lyman continuum photons from star forming galaxies is an elusive parameter. When observed, it provides a wealth of information on star formation in galaxies and the geometry of the interstellar medium, and puts constraints on the role of star forming galaxies in the reionization of the universe. H-alpha-selected galaxies at z~2 trace the highest star formation population at the peak of cosmic star formation history, providing a base for directly measuring Lyman continuum escape… 

Figures from this paper

Detection of high Lyman continuum leakage from four low-redshift compact star-forming galaxies
Following our first detection reported in Izotov et al. (2016), we present the detection of Lyman continuum (LyC) radiation of four other compact star-forming galaxies observed with the Cosmic
Do galaxies that leak ionizing photons have extreme outflows
To reionize the early universe, high-energy photons must escape the galaxies that produce them. It has been suggested that stellar feedback drives galactic outflows out of star-forming regions,
The production and escape of Lyman-Continuum radiation from star-forming galaxies at z~2 and their redshift evolution
We study the production and escape of ionizing photons of a sample of 588 H$\alpha$ (Ha) emitters (HAEs) at z=2.2 in COSMOS by exploring their rest-frame Lyman Continuum (LyC) with GALEX/NUV data. We
Conditions for Reionizing the Universe with a Low Galaxy Ionizing Photon Escape Fraction
We explore scenarios for reionizing the intergalactic medium with low galaxy ionizing photon escape fractions. We combine simulation-based halo-mass dependent escape fractions with an extrapolation
The effects of binary stars on galaxies and metal-enriched gas during reionization
Binary stars are abundant in nearby galaxies, but are typically unaccounted for in simulations of the high redshift Universe. Stellar population synthesis models that include the effects of binary
Revisiting the Lyman Continuum Escape Crisis: Predictions for z > 6 from Local Galaxies
The intrinsic escape fraction of ionizing Lyman continuum photons (f_(esc)) is crucial to understanding whether galaxies are capable of reionizing the neutral hydrogen in the early universe at z > 6.
Hubble Space Telescope Wide Field Camera 3 Observations of Escaping Lyman Continuum Radiation from Galaxies and Weak AGN at Redshifts $z$$\,\simeq\,$2.3-4.1
We present observations of escaping Lyman Continuum (LyC) radiation from 34 massive star-forming galaxies and 12 weak AGN with reliably measured spectroscopic redshifts at $z$$\simeq$2.3-4.1. We
Extinction Correction Significantly Influences the Estimate of the Lyα Escape Fraction
The Ly$\alpha$ escape fraction is a key measure to constrain the neutral state of the intergalactic medium and then to understand how the universe was fully reionized. We combine deep narrowband

References

SHOWING 1-10 OF 23 REFERENCES
The Lyman continuum escape fraction of galaxies at z = 3.3 in the VUDS-LBC/COSMOS field
Context. The ionizing Lyman continuum flux escaping from high-redshift galaxies into the intergalactic medium is a fundamental quantity to understand the physical processes involved in the
Lyman-Continuum Emission from Galaxies at z ≃ 3.4 *
We report the detection of significant Lyman-continuum flux in the composite spectrum of 29 Lyman-break galaxies (LBGs) with redshifts z = 3.40 ± 0.09. After correction for opacity due to intervening
Detections of Lyman Continuum from Star-Forming Galaxies at z ~ 3 through Subaru/Suprime-Cam Narrow-Band Imaging
Knowing the amount of ionizing photons from young star-forming galaxies is of particular importance to understanding the reionization process. Here we report initial results of Subaru/Suprime-Cam
ON THE DETECTION OF IONIZING RADIATION ARISING FROM STAR-FORMING GALAXIES AT REDSHIFT z ∼ 3-4: LOOKING FOR ANALOGS OF “STELLAR RE-IONIZERS”
We use the spatially resolved, multi-band photometry in the GOODS South field acquired by the CANDELS project to constrain the nature of candidate Lyman continuum (LyC) emitters at redshift z ~ 3.7
A Deep Hubble and Keck Search for Definitive Identification of Lyman Continuum Emitters at z~3.1
Narrow-band imaging of the rest-frame Lyman continuum (LyC) of galaxies at z~3.1 has produced a large number of candidate LyC-emitting galaxies. These samples are contaminated by galaxies at lower
New Constraints on Cosmic Reionization from the 2012 Hubble Ultra Deep Field Campaign
Understanding cosmic reionization requires the identification and characterization of early sources of hydrogen-ionizing photons. The 2012 Hubble Ultra Deep Field (UDF12) campaign has acquired the
The H-alpha luminosity function at redshift 2.2 - A new determination using VLT/HAWK-I
We aim to place new, strengthened constraints on the luminosity function (LF) of H-alpha (H alpha) emitting galaxies at redshift z approximate to 2.2, and to further constrain the instantaneous
Reionization after Planck: The Derived Growth of the Cosmic Ionizing Emissivity now matches the Growth of the Galaxy UV Luminosity Density
Thomson optical depth tau measurements from Planck provide new insights into the reionization of the universe. In pursuit of model-independent constraints on the properties of the ionising sources,
Cosmic Star-Formation History
Over the past two decades, an avalanche of data from multiwavelength imaging and spectroscopic surveys has revolutionized our view of galaxy formation and evolution. Here we review the range of
Cosmic Reionization after Planck: The Derived Growth of the Ionizing Background now matches the Growth of the Galaxy UV Luminosity Density
Thomson optical depth measurements from Planck provide new insights into the reionization of the universe. To obtain new model-independent constraints on the properties of the ionizing sources, we
...
1
2
3
...