A dual AGN at z=5.4 associated with a Lyman-alpha nebula in the centre of a cosmic filament

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A90106%2F25%3A00646362" target="_blank" >RIV/67985815:90106/25:00646362 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1093/mnras/staf1992" target="_blank" >https://doi.org/10.1093/mnras/staf1992</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/staf1992" target="_blank" >10.1093/mnras/staf1992</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A dual AGN at z=5.4 associated with a Lyman-alpha nebula in the centre of a cosmic filament

Popis výsledku v původním jazyce

Predictions from current theories and simulations suggest that dual active galactic nucleus (AGN) systems are exceedingly rare at high redshifts. The intense radiation and powerful outflows from AGNs regulate star formation, heat the interstellar medium, and drive massive gas outflows that shape the host galaxy and its surroundings. One manifestation of AGN feedback is the creation of extended Ly alpha nebulae. However, identifying these systems at high-z is challenging. Here, we report a remarkable dual AGN candidate at z similar to 5.4 using James Webb Space Telescope NIRCam ( Near-Infrared Camera ) and NIRSpec ( Near-Infrared Spectrograph ), with a separation of similar to 1.7 arcsec (similar to 10.4 pkpc). This is one of the highest spectroscopically confirmed redshift dual AGNs discovered. Photometric spectral energy distribution fitting shows excellent agreement with AGN templates, strongly suggesting a rare dual AGN system. Baldwin, Phillips & Terlevich (BPT) diagrams and high ionization lines further support the presence of AGNs. Very Large Telescope/Multi Unit Spectroscopic Explorer (VLT/MUSE) observations reveal strong extended Ly alpha emission, extending to > 22 kpc, making it one of the most extended Ly alpha nebulae at z similar to 6. This provides observational evidence of anisotropic AGN-driven photoionization or shocks. The high Ly alpha escape fraction also indicates an AGN outflow. This dual AGN candidate is also associated with a well-defined overdensity, potentially at the centre of a z similar to 5.4 protocluster or filamentary structure node. Further analysis indicates the fraction of dual AGNs is significantly higher than theoretically expected at high redshifts. This discovery provides a new opportunity to study dual AGN interactions and their impact on the circumgalactic medium and cosmic structure evolution.

Název v anglickém jazyce

A dual AGN at z=5.4 associated with a Lyman-alpha nebula in the centre of a cosmic filament

Popis výsledku anglicky

Predictions from current theories and simulations suggest that dual active galactic nucleus (AGN) systems are exceedingly rare at high redshifts. The intense radiation and powerful outflows from AGNs regulate star formation, heat the interstellar medium, and drive massive gas outflows that shape the host galaxy and its surroundings. One manifestation of AGN feedback is the creation of extended Ly alpha nebulae. However, identifying these systems at high-z is challenging. Here, we report a remarkable dual AGN candidate at z similar to 5.4 using James Webb Space Telescope NIRCam ( Near-Infrared Camera ) and NIRSpec ( Near-Infrared Spectrograph ), with a separation of similar to 1.7 arcsec (similar to 10.4 pkpc). This is one of the highest spectroscopically confirmed redshift dual AGNs discovered. Photometric spectral energy distribution fitting shows excellent agreement with AGN templates, strongly suggesting a rare dual AGN system. Baldwin, Phillips & Terlevich (BPT) diagrams and high ionization lines further support the presence of AGNs. Very Large Telescope/Multi Unit Spectroscopic Explorer (VLT/MUSE) observations reveal strong extended Ly alpha emission, extending to > 22 kpc, making it one of the most extended Ly alpha nebulae at z similar to 6. This provides observational evidence of anisotropic AGN-driven photoionization or shocks. The high Ly alpha escape fraction also indicates an AGN outflow. This dual AGN candidate is also associated with a well-defined overdensity, potentially at the centre of a z similar to 5.4 protocluster or filamentary structure node. Further analysis indicates the fraction of dual AGNs is significantly higher than theoretically expected at high redshifts. This discovery provides a new opportunity to study dual AGN interactions and their impact on the circumgalactic medium and cosmic structure evolution.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

—

Rok uplatnění

2025

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

544

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

4160-4172

Kód UT WoS článku

001628273000001

EID výsledku v databázi Scopus

2-s2.0-105024672015