@article{4d43d3ed9fa343a199cdaa5a2574d972,
title = "Fuelling the nuclear ring of NGC 1097",
abstract = "Galactic bars can drive cold gas inflows towards the centres of galaxies. The gas transport happens primarily through the so-called bar dust lanes, which connect the galactic disc at kpc scales to the nuclear rings at hundreds of pc scales much like two gigantic galactic rivers. Once in the ring, the gas can fuel star formation activity, galactic outflows, and central supermassive black holes. Measuring the mass inflow rates is therefore important to understanding the mass/energy budget and evolution of galactic nuclei. In this work, we use CO datacubes from the PHANGS-ALMA survey and a simple geometrical method to measure the bar-driven mass inflow rate on to the nuclear ring of the barred galaxy NGC 1097. The method assumes that the gas velocity in the bar lanes is parallel to the lanes in the frame co-rotating with the bar, and allows one to derive the inflow rates from sufficiently sensitive and resolved position–position–velocity diagrams if the bar pattern speed and galaxy orientations are known. We find an inflow rate of Ṁ = (3.0 ± 2.1) M⊙ yr-1 averaged over a time span of 40 Myr, which varies by a factor of a few over time-scales of ∼10 Myr. Most of the inflow appears to be consumed by star formation in the ring, which is currently occurring at a star formation rate (SFR) of ≃1.8-2M⊙ yr-1 suggesting that the inflow is causally controlling the SFR in the ring as a function of time.",
keywords = "Galaxies: bar, Galaxies: individual: NGC 1097, Galaxies: ISM, Galaxies: kinematics and dynamics, Galaxies: nuclei",
author = "Sormani, {Mattia C.} and Barnes, {Ashley T.} and Jiayi Sun and Stuber, {Sophia K.} and Eva Schinnerer and Eric Emsellem and Leroy, {Adam K.} and Glover, {Simon C. O.} and Henshaw, {Jonathan D.} and Meidt, {Sharon E.} and Justus Neumann and Miguel Querejeta and Williams, {Thomas G.} and Frank Bigiel and Cosima Eibensteiner and Francesca Fragkoudi and Levy, {Rebecca C.} and Kathryn Grasha and Klessen, {Ralf S.} and Kruijssen, {J. M. Diederik} and Nadine Neumayer and Francesca Pinna and Rosolowsky, {Erik W.} and Smith, {Rowan J.} and Yu-Hsuan Teng and Tress, {Robin G.} and Watkins, {Elizabeth J.}",
note = "Funding: MCS and RSK thank for support from the European Research Council via the ERC Synergy Grant {\textquoteleft}ECOGAL – Understanding our Galactic ecosystem: from the disk of the Milky Way to the formation sites of stars and planets{\textquoteright}(grant 855130),from the Heidelberg Cluster of Excellence (EXC 2181–390900948) {\textquoteleft}STRUCTURES{\textquoteright}, funded by the German Excellence Strategy, and from the German Ministry for Economic Affairs and Climate Action in project {\textquoteleft}MAINN{\textquoteright} (funding ID 50OO2206). MCS acknowledges financial support from the Royal Society (URF\R1\221118). ATB and FB acknowledge funding from the European Research Council (ERC) under the European Union{\textquoteright}s Horizon 2020 research and innovation programme (grant agreement no. 726384/Empire). JMDK acknowledges funding from the European Research Council (ERC) under the European Union{\textquoteright}s Horizon 2020 research and innovation programme via the ERC Starting Grant MUSTANG (grant agreement no. 714907). JDH gratefully acknowledges financial support from the Royal Society (University Research Fellowship; URF\R1\221620). RJS gratefully acknowledges an STFC Ernest Rutherford fellowship (grant ST/N00485X/1). ES and JN acknowledge funding from the European Research Council (ERC) under the European Union{\textquoteright}s Horizon 2020 research and innovationprogramme (grant agreement no. 694343).",
year = "2023",
month = aug,
doi = "10.1093/mnras/stad1554",
language = "English",
volume = "523",
pages = "2918--2927",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "2",
}