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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GJ17-06217Y" target="_blank" >GJ17-06217Y: Únik ionizujícího záření z galaxií</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Astronomy & Astrophysics

ISSN

1432-0746

e-ISSN

—

Svazek periodika

606

Číslo periodika v rámci svazku

September

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

17

Strana od-do

"A19/1"-"A19/17"

Kód UT WoS článku

000412875200001

EID výsledku v databázi Scopus

2-s2.0-85030701606&