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Naslov:A systematically selected sample of luminous, long-duration, ambiguous nuclear transients
Avtorji:ID Wiseman, P. (Avtor)
ID Williams, R. D. (Avtor)
ID Arcavi, I. (Avtor)
ID Galbany, L. (Avtor)
ID Graham, M. J. (Avtor)
ID Hönig, S. (Avtor)
ID Newsome, M. (Avtor)
ID Subrayan, B. (Avtor)
ID Sullivan, Mark (Avtor)
ID Petrushevska, Tanja (Avtor)
Datoteke:.pdf 2406.11552v2.pdf (5,37 MB)
MD5: 087DA9CE9A276B6FCC37C0C6FAB53E4B
 
URL https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/staf116/61531394/staf116.pdf
 
URL https://academic.oup.com/mnras/article-pdf/537/2/2024/61531394/staf116.pdf
 
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Jezik:Angleški jezik
Vrsta gradiva:Neznano
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:ABSTRACT We present a search for luminous long-duration ambiguous nuclear transients (ANTs) similar to the unprecedented discovery of the extreme ambiguous event AT2021lwx with a >150 d rise time and luminosity 1045.7 erg s−1. We use the Lasair transient broker to search Zwicky Transient Facility (ZTF) data for transients lasting more than one year and exhibiting smooth declines. Our search returns 59 events, 7 of which we classify as ANTs assumed to be driven by accretion onto supermassive black holes. We propose the remaining 52 are stochastic variability from regular supermassive black hole accretion rather than distinct transients. We supplement the seven ANTs with three nuclear transients in ZTF that fail the light curve selection but have clear single flares and spectra that do not resemble typical active galactic nucleus. All of these 11 ANTs have a mid-infrared flare from an assumed dust echo, implying the ubiquity of dust around the black holes giving rise to ANTs. No events are more luminous than AT2021lwx, but one (ZTF19aamrjar) has twice the duration and a higher integrated energy release. On the other extreme, ZTF20abodaps reaches a luminosity close to AT2021lwx with a rise time <20 d and that fades smoothly in >600 d. We define a portion of rise-time versus flare amplitude space that selects ANTs with ∼50 per cent purity against variable AGNs. We calculate a volumetric rate of ≳3×10−11 Mpc−1 yr−1, consistent with the events being caused by tidal disruptions of intermediate and high-mass stars.
Ključne besede:tidal disruption events, accretion
Status publikacije:Objavljeno
Verzija publikacije:Objavljena publikacija
Datum objave:01.01.2025
Leto izida:2025
Št. strani:str. 2024–2045
Številčenje:Vol. 537, issue 2
PID:20.500.12556/RUNG-9832 Novo okno
ISSN:0035-8711
COBISS.SI-ID:225362435 Novo okno
UDK:52
ISSN pri članku:0035-8711
eISSN:1365-2966
DOI:https://doi.org/10.1093/mnras/staf116 Novo okno
NUK URN:URN:SI:UNG:REP:QDQEFUGR
Datum objave v RUNG:06.02.2025
Število ogledov:545
Število prenosov:8
Metapodatki:XML DC-XML DC-RDF
:
WISEMAN, P., WILLIAMS, R. D., ARCAVI, I., GALBANY, L., GRAHAM, M. J., HÖNIG, S., NEWSOME, M., SUBRAYAN, B., SULLIVAN, Mark in PETRUSHEVSKA, Tanja, 2025, A systematically selected sample of luminous, long-duration, ambiguous nuclear transients. Monthly notices of the royal astronomical society [na spletu]. 2025. Vol. 537, no. 2. [Dostopano 12 april 2025]. DOI https://doi.org/10.1093/mnras/staf116. Pridobljeno s: https://repozitorij.ung.si/IzpisGradiva.php?lang=slv&id=9832
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Gradivo je del revije

Naslov:Monthly notices of the royal astronomical society
Skrajšan naslov:Mon. Not. R. Astron. Soc.
Založnik:Blackwell Scientific Publications
ISSN:0035-8711
COBISS.SI-ID:25980416 Novo okno

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Začetek licenciranja:22.01.2025

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