The VIMOS Ultra Deep Survey The role of HI kinematics and HI column density on the escape of Ly alpha photons in star-forming galaxies at 2 < z < 4

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F17%3A00484648" target="_blank" >RIV/67985815:_____/17:00484648 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1051/0004-6361/201730603" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201730603</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/201730603" target="_blank" >10.1051/0004-6361/201730603</a>

Result language
angličtina
Original language name
The VIMOS Ultra Deep Survey The role of HI kinematics and HI column density on the escape of Ly alpha photons in star-forming galaxies at 2 < z < 4
Original language description
We wish to assess the role of kinematics and neutral hydrogen column density in the escape and distribution of Ly alpha photons. We selected a sample of 76 Ly alpha emitting galaxies from the VIMOS Ultra Deep Survey (VUDS) at 2 <= z <= 4. We estimated the velocity of the neutral gas flowing out of the interstellar medium as the velocity off set, Delta v, between the systemic redshift (z(sys)) and the center of low-ionization absorption line systems (LIS). To increase the S/N of VUDS spectra, we stacked subsamples defined based on median values of their photometric and spectroscopic properties. We measured the systemic redshift from the rest-frame UV spectroscopic data using the CIII] 1908 nebular emission line, and we considered SiII1526 as the highest signal-to-noise LIS line. We calculated the Ly alpha peak shift with respect to the z(sys), the EW(Ly alpha), and the Ly alpha spatial extension, Ext(Ly alpha-C), from the in the 2D stacked spectra.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
<a href="/en/project/GJ17-06217Y" target="_blank" >GJ17-06217Y: Ionizing radiation escape from 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

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