The SAMI Galaxy Survey: impact of black hole activity on galaxy spin-filament alignments ...

The activity of central supermassive black holes might affect the alignment of galaxy spin axes with respect to the closest cosmic filaments. We exploit the SAMI Galaxy Survey to study possible relations between black hole activity and the spin-filament alignments of stars and ionised gas separately...

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Bibliographic Details
Main Authors: Barsanti, Stefania, Colless, Matthew, D'Eugenio, Francesco, Oh, Sree, Bryant, Julia J., Casura, Sarah, Croom, Scott M., Mai, Yifan, Ristea, Andrei, van de Sande, Jesse, Welker, Charlotte, Zovaro, Henry R. M.
Format: Article in Journal/Newspaper
Language:unknown
Published: arXiv 2023
Subjects:
Astrophysics of Galaxies astro-ph.GA
FOS Physical sciences
sami
Online Access:https://dx.doi.org/10.48550/arxiv.2309.02794
https://arxiv.org/abs/2309.02794
Description
Summary:The activity of central supermassive black holes might affect the alignment of galaxy spin axes with respect to the closest cosmic filaments. We exploit the SAMI Galaxy Survey to study possible relations between black hole activity and the spin-filament alignments of stars and ionised gas separately. To explore the impact of instantaneous black hole activity, active galaxies are selected according to emission-line diagnostics. Central stellar velocity dispersion ($σ_c$) is used as a proxy for black hole mass and its integrated activity. We find evidence for the gas spin-filament alignments to be influenced by AGN, with Seyfert galaxies showing a stronger perpendicular alignment at fixed bulge mass with respect to galaxies where ionisation is consequence of low-ionizaition nuclear emission-line regions (LINERs) or old stellar populations (retired galaxies). On the other hand, the greater perpendicular tendency for the stellar spin-filament alignments of high-bulge mass galaxies is dominated by retired ... : 20 pages, 16 figures, accepted for publication in MNRAS ...

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