Lyman-alpha spectral properties of five newly discovered Lyman continuum emitters

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F17%3A00484656" target="_blank" >RIV/67985815:_____/17:00484656 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1051/0004-6361/201629264" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201629264</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/201629264" target="_blank" >10.1051/0004-6361/201629264</a>

Result language

angličtina

Original language name

Lyman-alpha spectral properties of five newly discovered Lyman continuum emitters

Original language description

We have recently reported the discovery of five low redshift Lyman continuum (LyC) emitters (LCEs) with absolute escape lfractions f(esc)(LyC) that range from 6 to 13%, higher than previously found and that more than double the number of low redshift LCEs. We use these observations to test theoretical predictions about a link between the characteristics of the Lyman-alpha (Ly alpha) line from galaxies and the escape of ionizing photons. Our LCEs are found to be strong Ly alpha emitters, with high equivalent widths, EW(Ly alpha) > 70 angstrom, and large Ly alpha escape fractions, f(esc)(Ly alpha)> 20%. The Ly alpha profiles are all double-peaked with a small peak separation, in agreement with our theoretical expectations. They also have no underlying absorption at the Ly alpha position. All these characteristics are very different from the Ly alpha properties of typical star-forming galaxies of the local Universe. A subset of the comparison samples (2-3 Green Pea galaxies) share these extreme values, indicating that they could also be leaking. We also find a strong correlation between the star formation rate surface density and the escape fraction of ionizing photons, indicating that the compactness of star-forming regions plays a role in shaping low column density paths in the interstellar medium of LCEs.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

<a href="/en/project/GP14-20666P" target="_blank" >GP14-20666P: Understanding the origin of Lyman-alpha emission and absorption in galaxies</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astronomy & Astrophysics

ISSN

1432-0746

e-ISSN

—

Volume of the periodical

597

Issue of the periodical within the volume

January

Country of publishing house

FR - FRANCE

Number of pages

13

Pages from-to

"A13/1"-"A13/13"

UT code for WoS article

000392392900098

EID of the result in the Scopus database

2-s2.0-85007246530