XMM-Newton conclusively identifies an active galactic nucleus in a Green Pea Galaxy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F25%3A00637871" target="_blank" >RIV/67985815:_____/25:00637871 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/25:00142053

Výsledek na webu

<a href="https://hdl.handle.net/11104/0368777" target="_blank" >https://hdl.handle.net/11104/0368777</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-4357/add727" target="_blank" >10.3847/1538-4357/add727</a>

Jazyk výsledku

angličtina

Název v původním jazyce

XMM-Newton conclusively identifies an active galactic nucleus in a Green Pea Galaxy

Popis výsledku v původním jazyce

Green Pea galaxies are a class of compact, low-mass, low-metallicity star-forming galaxies in the relatively local Universe. They are believed to be analogs of high-redshift galaxies that reionized the Universe, and, indeed, the James Webb Space Telescope (JWST) is now uncovering such populations at record redshifts. Intriguingly, JWST finds evidence suggestive of active galactic nuclei (AGN) in many of these distant galaxies, including the elusive Little Red Dots, which broadly lack any detectable X-ray counterparts. Intuitively, one would expect to detect an AGN in their low-redshift analogs with X-rays, yet no study to date has conclusively identified an X-ray AGN within a Green Pea galaxy. Here we present the deepest X-ray campaign of a Green Pea galaxy performed to date, obtained with the goal of discerning the presence of a (potentially low-luminosity) AGN. The target-SDSS J082247.66+224144.0 (hereafter J0822+2241)-was previously found to display a comparable X-ray spectral shape to more local AGN (Gamma similar to 2) and a high luminosity (L2-10 keV similar to 10(42) erg s(-1)). We show that over 6.2 yr (rest frame) the 2-10 keV luminosity of J0822+2241 is constant, whereas the soft 0.5-2 keV flux has decreased significantly by similar to 60%. We discuss possible scenarios to explain the X-ray properties of J0822+2241, finding transient low column density obscuration surrounding an AGN to be the only plausible scenario. J0822+2241 thus provides further evidence that low-luminosity AGN activity could have contributed to the epoch of reionization and that local analogs are useful to derive a complete multiwavelength picture of black hole growth in high-redshift, low-luminosity AGNs.

Název v anglickém jazyce

XMM-Newton conclusively identifies an active galactic nucleus in a Green Pea Galaxy

Popis výsledku anglicky

Green Pea galaxies are a class of compact, low-mass, low-metallicity star-forming galaxies in the relatively local Universe. They are believed to be analogs of high-redshift galaxies that reionized the Universe, and, indeed, the James Webb Space Telescope (JWST) is now uncovering such populations at record redshifts. Intriguingly, JWST finds evidence suggestive of active galactic nuclei (AGN) in many of these distant galaxies, including the elusive Little Red Dots, which broadly lack any detectable X-ray counterparts. Intuitively, one would expect to detect an AGN in their low-redshift analogs with X-rays, yet no study to date has conclusively identified an X-ray AGN within a Green Pea galaxy. Here we present the deepest X-ray campaign of a Green Pea galaxy performed to date, obtained with the goal of discerning the presence of a (potentially low-luminosity) AGN. The target-SDSS J082247.66+224144.0 (hereafter J0822+2241)-was previously found to display a comparable X-ray spectral shape to more local AGN (Gamma similar to 2) and a high luminosity (L2-10 keV similar to 10(42) erg s(-1)). We show that over 6.2 yr (rest frame) the 2-10 keV luminosity of J0822+2241 is constant, whereas the soft 0.5-2 keV flux has decreased significantly by similar to 60%. We discuss possible scenarios to explain the X-ray properties of J0822+2241, finding transient low column density obscuration surrounding an AGN to be the only plausible scenario. J0822+2241 thus provides further evidence that low-luminosity AGN activity could have contributed to the epoch of reionization and that local analogs are useful to derive a complete multiwavelength picture of black hole growth in high-redshift, low-luminosity AGNs.

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/GA22-22643S" target="_blank" >GA22-22643S: Galaktická gastronomie: Hrášky a Borůvky</a><br>

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

Astrophysical Journal

ISSN

0004-637X

e-ISSN

1538-4357

Svazek periodika

988

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

20

Strana od-do

157

Kód UT WoS článku

001533497700001

EID výsledku v databázi Scopus

2-s2.0-105011746384