Comparing emission- and absorption-based gas-phase metallicities in GRB host galaxies at z = 2-4 using JWST

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F24%3A00585244" target="_blank" >RIV/67985815:_____/24:00585244 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0353669" target="_blank" >https://hdl.handle.net/11104/0353669</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/stae677" target="_blank" >10.1093/mnras/stae677</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Comparing emission- and absorption-based gas-phase metallicities in GRB host galaxies at z = 2-4 using JWST

Popis výsledku v původním jazyce

We present results from a JWST/NIRSpec programme to investigate for the first time the relation between the metallicity of neutral gas probed in absorption by GRB afterglows and the metallicity of the star-forming regions for the same host galaxy sample. Using an initial sample of eight GRB host galaxies at z = 2.1-4.7, we find a tight relation between absorption and emission line metallicities when using the recently proposed R(over dot) metallicity diagnostic (+/- 0.2 dex). This agreement implies a relatively chemically homogeneous multiphase interstellar medium and indicates that absorption and emission line probes can be directly compared. However, the relation is less clear when using other diagnostics, such as R-23 and R-3. We also find possible evidence of an elevated N/O ratio in the host galaxy of GRB 090323 at z = 4.7, consistent with what has been seen in other z > 4 galaxies. Ultimate confirmation of an enhanced N/O ratio and of the relation between absorption and emission line metallicities will require a more direct determination of the emission line metallicity via the detection of temperature-sensitive auroral lines in our GRB host galaxy sample.

Název v anglickém jazyce

Comparing emission- and absorption-based gas-phase metallicities in GRB host galaxies at z = 2-4 using JWST

Popis výsledku anglicky

We present results from a JWST/NIRSpec programme to investigate for the first time the relation between the metallicity of neutral gas probed in absorption by GRB afterglows and the metallicity of the star-forming regions for the same host galaxy sample. Using an initial sample of eight GRB host galaxies at z = 2.1-4.7, we find a tight relation between absorption and emission line metallicities when using the recently proposed R(over dot) metallicity diagnostic (+/- 0.2 dex). This agreement implies a relatively chemically homogeneous multiphase interstellar medium and indicates that absorption and emission line probes can be directly compared. However, the relation is less clear when using other diagnostics, such as R-23 and R-3. We also find possible evidence of an elevated N/O ratio in the host galaxy of GRB 090323 at z = 4.7, consistent with what has been seen in other z > 4 galaxies. Ultimate confirmation of an enhanced N/O ratio and of the relation between absorption and emission line metallicities will require a more direct determination of the emission line metallicity via the detection of temperature-sensitive auroral lines in our GRB host galaxy sample.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

1365-2966

Svazek periodika

529

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

25

Strana od-do

2807-2831

Kód UT WoS článku

001188770300012

EID výsledku v databázi Scopus

2-s2.0-85188705507