XMM-Newton conclusively identifies an active galactic nucleus in a Green Pea Galaxy
The result's identifiers
Result code in 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>
Alternative codes found
RIV/00216224:14310/25:00142053
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
XMM-Newton conclusively identifies an active galactic nucleus in a Green Pea Galaxy
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
<a href="/en/project/GA22-22643S" target="_blank" >GA22-22643S: Galactic gastronomy: Green Peas and Blueberries</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astrophysical Journal
ISSN
0004-637X
e-ISSN
1538-4357
Volume of the periodical
988
Issue of the periodical within the volume
2
Country of publishing house
GB - UNITED KINGDOM
Number of pages
20
Pages from-to
157
UT code for WoS article
001533497700001
EID of the result in the Scopus database
2-s2.0-105011746384