GalIMF-E-MILES library: Impact of an environment-dependent initial mass function on stellar population spectra

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10509926" target="_blank" >RIV/00216208:11320/25:10509926 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/25:00143350

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Z9KyKUB66M" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Z9KyKUB66M</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/202555603" target="_blank" >10.1051/0004-6361/202555603</a>

Jazyk výsledku

angličtina

Název v původním jazyce

GalIMF-E-MILES library: Impact of an environment-dependent initial mass function on stellar population spectra

Popis výsledku v původním jazyce

We present, for the first time, model spectra of single-age, single-metallicity stellar populations computed with the E-MILES evolutionary synthesis code incorporating an environment-dependent, variable galaxy-wide initial mass function (gwIMF). This gwIMF, calculated using the GalIMF code, is rooted in the integrated galactic initial mass function (IGIMF) theory, which predicts IMF variations as a function of the star formation rate and the metallicity. By coupling these two codes, we generated a comprehensive library of single-burst stellar population spectra uniquely sensitive to gwIMF variations. Through detailed comparisons with the canonical Milky-Way IMF, we reveal how both the spectral energy distributions and key stellar absorption features systematically evolve with age under different IMF conditions. Our results uncover clear spectral signatures tied to IMF variability, emphasising the critical role of star formation and chemical enrichment histories in shaping the integrated light observed in galaxies. Based on our work, specific absorption spectral indices emerge as powerful diagnostics, and they open new pathways to empirically test IMF variations and refine models of galaxy formation and evolution. All synthetic spectra generated in this study are publicly available and constitute a valuable resource for future observational and theoretical investigations.

Název v anglickém jazyce

GalIMF-E-MILES library: Impact of an environment-dependent initial mass function on stellar population spectra

Popis výsledku anglicky

We present, for the first time, model spectra of single-age, single-metallicity stellar populations computed with the E-MILES evolutionary synthesis code incorporating an environment-dependent, variable galaxy-wide initial mass function (gwIMF). This gwIMF, calculated using the GalIMF code, is rooted in the integrated galactic initial mass function (IGIMF) theory, which predicts IMF variations as a function of the star formation rate and the metallicity. By coupling these two codes, we generated a comprehensive library of single-burst stellar population spectra uniquely sensitive to gwIMF variations. Through detailed comparisons with the canonical Milky-Way IMF, we reveal how both the spectral energy distributions and key stellar absorption features systematically evolve with age under different IMF conditions. Our results uncover clear spectral signatures tied to IMF variability, emphasising the critical role of star formation and chemical enrichment histories in shaping the integrated light observed in galaxies. Based on our work, specific absorption spectral indices emerge as powerful diagnostics, and they open new pathways to empirically test IMF variations and refine models of galaxy formation and evolution. All synthetic spectra generated in this study are publicly available and constitute a valuable resource for future observational and theoretical investigations.

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

2025

Kód důvěrnosti údajů

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

Název periodika

Astronomy &amp; Astrophysics

ISSN

0004-6361

e-ISSN

1432-0746

Svazek periodika

702

Číslo periodika v rámci svazku

rijen

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

18

Strana od-do

A229

Kód UT WoS článku

001599834100005

EID výsledku v databázi Scopus

2-s2.0-105020678526