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Verfasst von:Marian, Victor [VerfasserIn]   i
 Jahnke, Knud [VerfasserIn]   i
 Husemann, Bernd [VerfasserIn]   i
Titel:Major mergers are not the dominant trigger for high-accretion AGNs at z ~ 2
Verf.angabe:Victor Marian, Knud Jahnke, Mira Mechtley, Seth Cohen, Bernd Husemann, Victoria Jones, Anton Koekemoer, Andreas Schulze, Arjen van der Wel, Carolin Villforth, and Rogier A. Windhorst
E-Jahr:2019
Jahr:2019 September 11
Umfang:14 S.
Teil:volume:882
 year:2019
 number:2
 pages:141
 extent:14
Fussnoten:Gesehen am 02.12.2019
Titel Quelle:Enthalten in: The astrophysical journal / 1
Ort Quelle:London : Institute of Physics Publ., 1996
Jahr Quelle:2019
Band/Heft Quelle:882(2019,2) Artikel-Nummer 141, 14 Seiten
ISSN Quelle:1538-4357
Abstract:Research over the past decade has shown diminishing evidence for major galaxy mergers being a dominant mechanism for the growth of supermassive black holes (BHs) in galaxies and the triggering of optically or X-ray-selected active galactic nuclei (AGNs). For the first time we test whether such a connection exists at least in the most “plausible” part of parameter space: the highest specific accretion rate broad-line AGNs at the peak epoch of BH activity around z = 2. To that end we analyze two samples—21 AGNs with L/L edd > 0.7 and 92 stellar mass- and redshift-matched inactive galaxies—observed with HST/WFC3. We remove the AGN point sources from their host galaxies and avoid bias in visual classification by adding and then subtracting mock point sources to and from the comparison galaxies, producing matched residual structures for both sets. The resulting samples are joined and visually ranked according to distortion strength by 10 experts. The ensuing individual rankings are combined into a consensus sequence and from this we derive the merger fractions for both samples. With the merger fractions f m,agn = 0.24 ± 0.09 for the AGN host galaxy sample and f m,ina = 0.19 ± 0.04 for the inactive galaxies, we find no significant difference between the samples. This finding is consistent with previous studies for different AGN populations, and we conclude that even BH growth at the highest specific accretion rates and at the peak of cosmic AGN activity is not predominantly caused by major mergers.
DOI:doi:10.3847/1538-4357/ab385b
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext: https://doi.org/10.3847/1538-4357/ab385b
 Verlag: https://doi.org/10.3847%2F1538-4357%2Fab385b
 DOI: https://doi.org/10.3847/1538-4357/ab385b
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1683870425
Verknüpfungen:→ Zeitschrift

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