An increase in black hole activity in galaxies with kinematically misaligned gas
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An increase in black hole activity in galaxies with kinematically misaligned gas. / Raimundo, Sandra I.; Malkan, Matthew; Vestergaard, Marianne.
I: Nature Astronomy, Bind 7, 04.2023, s. 463-472.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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T1 - An increase in black hole activity in galaxies with kinematically misaligned gas
AU - Raimundo, Sandra I.
AU - Malkan, Matthew
AU - Vestergaard, Marianne
PY - 2023/4
Y1 - 2023/4
N2 - Analysis of a large galaxy sample shows that black hole activity is greater in galaxies in which the stellar and gas kinematics are misaligned. This observation suggests that the misalignment, driven by external gas accretion, fuels the central supermassive black holes.External accretion events such as a galaxy merger or the accretion of gas from the immediate environment of a galaxy can create a large misalignment between the gas and the stellar kinematics. Numerical simulations have suggested that misaligned structures may promote the inflow of gas to the nucleus of the galaxy and the accretion of gas by the central supermassive black hole. We show for the first time that galaxies with a strong misalignment between the ionized gas and stellar kinematic angles have a higher observed fraction of active black holes than galaxies with aligned rotation of gas and stars. The increase in black hole activity suggests that the process of formation and/or the presence of misaligned structures are connected with the fuelling of active supermassive black holes.
AB - Analysis of a large galaxy sample shows that black hole activity is greater in galaxies in which the stellar and gas kinematics are misaligned. This observation suggests that the misalignment, driven by external gas accretion, fuels the central supermassive black holes.External accretion events such as a galaxy merger or the accretion of gas from the immediate environment of a galaxy can create a large misalignment between the gas and the stellar kinematics. Numerical simulations have suggested that misaligned structures may promote the inflow of gas to the nucleus of the galaxy and the accretion of gas by the central supermassive black hole. We show for the first time that galaxies with a strong misalignment between the ionized gas and stellar kinematic angles have a higher observed fraction of active black holes than galaxies with aligned rotation of gas and stars. The increase in black hole activity suggests that the process of formation and/or the presence of misaligned structures are connected with the fuelling of active supermassive black holes.
KW - GALACTIC NUCLEI
KW - ANGULAR-MOMENTUM
KW - STAR-FORMATION
KW - HOST GALAXIES
KW - LINE SPECTRA
KW - IONIZED-GAS
KW - COLD GAS
KW - EMISSION
KW - SAMI
KW - STELLAR
U2 - 10.1038/s41550-022-01880-z
DO - 10.1038/s41550-022-01880-z
M3 - Journal article
VL - 7
SP - 463
EP - 472
JO - Nature Astronomy
JF - Nature Astronomy
SN - 2397-3366
ER -
ID: 337693763