2016A&A...591L...8S


C.D.S. - SIMBAD4 rel 1.7 - 2020.06.06CEST07:46:07

2016A&A...591L...8S - Astronomy and Astrophysics, volume 591, L8-8 (2016/7-1)

The ionizing photon production efficiency of compact z ∼ 0.3 Lyman continuum leakers and comparison with high-redshift galaxies.

SCHAERER D., IZOTOV Y.I., VERHAMME A., ORLITOVA I., THUAN T.X., WORSECK G. and GUSEVA N.G.

Abstract (from CDS):

We have recently discovered five Lyman continuum leaking galaxies at z∼0.3 that were selected for their compactness, intense star formation, and high [OIII]λ5007/[OII] λ3727 ratio. Here we derive their ionizing photon production efficiency, ξion, a fundamental quantity for inferring the number of photons available to reionize the Universe. This is the first time this is done for galaxies with confirmed strong Lyman continuum escape (fesc∼6-13%). We find an ionizing photon production per unit UV luminosity, ξion, that is higher by a factor 2-6 than the canonical value when reported to their observed UV luminosity. After correction for extinction, this value is close to the canonical value. The properties of our five Lyman continuum leakers are found to be very similar to those of the previously reported confirmed z=3.218 leaker Ion2 and very similar to those of typical star-forming galaxies at z>=6. Our results suggest that UV bright galaxies at high-z such as Lyman-break galaxies can be Lyman continuum leakers and that their contribution to cosmic reionization may be underestimated.

Abstract Copyright: © ESO, 2016

Journal keyword(s): galaxies: starburst - galaxies: high-redshift - dark ages, reionization, first stars - ultraviolet: galaxies

Status at CDS:  

CDS comments: J1503+3644 not identified (incomplete format).

Simbad objects: 5

goto Full paper

goto View the reference in ADS

Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9399 1
2 SDSS J092532.36+140313.1 EmG 09 25 32.3641578796 +14 03 12.993552108           ~ 17 0
3 SDSS J115204.88+340049.8 Q? 11 52 04.8912713190 +34 00 49.896063418           ~ 13 0
4 SDSS J133303.95+624603.8 H2G 13 33 03.96 +62 46 03.8           ~ 14 0
5 2QZ J144231.3-020952 Q? 14 42 31.3700739287 -02 09 51.961344010   20.28       ~ 16 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2016A&A...591L...8S and select 'bookmark this link' or equivalent in the popup menu


2020.06.06-07:46:07

© Université de Strasbourg/CNRS

    • Contact