Disc galaxies are still settling: The discovery of the smallest nuclear discs and their young stellar bars

Abstract

When galactic discs settle and become massive enough, they are able to form stellar bars. These non-axisymmetric structures induce shocks in the gas, causing it to flow to the centre where nuclear structures, such as nuclear discs and rings, are formed. Previous theoretical and observational studies have hinted at the co-evolution of bars and nuclear discs, suggesting that nuclear discs grow "inside-out", thereby proposing that smaller discs live in younger bars. Nevertheless, it remains unclear how the bar and the nuclear structures form and evolve with time. The smallest nuclear discs discovered to date tend to be larger than $\sim 200\mathrm{pc}$, even though some theoretical studies find that when nuclear discs form they can be much smaller. Using MUSE archival data, we report for the first time two extragalactic nuclear discs with radius sizes below $100\mathrm{pc}$. Additionally, our estimations reveal the youngest bars found to date. We estimate that the bars in these galaxies formed $4.50_{-1.10}^{+1.60}{(\mathrm{sys})}_{-0.75}^{+1.00}(\mathrm{stat})$ and $0.7^{+2.60}{(\mathrm{sys})}_{-0.05}^{+0.05}(\mathrm{stat})\mathrm{Gyr}$ ago, for NGC\,289 and NGC\,1566, respectively. This suggests that at least some disc galaxies in the Local Universe may still be dynamically settling. By adding these results to previous findings in the literature, we retrieve a stronger correlation between nuclear disc size and bar length and we derive a tentative exponential growth scenario for nuclear discs.

arXiv commentAccepted in A&A (in press), 13 pages, 5 figures, 2 tabels

References in corpus (81)

• On the variation of the Initial Mass Function
• Parametric Recovery of Line-of-Sight Velocity Distributions from Absorption-Line Spectra of Galaxies via Penalized Likelihood
• Secular Evolution and the Formation of Pseudobulges in Disk Galaxies
• New Insight on Galaxy Formation and Evolution from Keck Spectroscopy of the Hawaii Deep Fields
• A large stellar evolution database for population synthesis studies. I. Scaled solar models and isochrones
• Adaptive spatial binning of integral-field spectroscopic data using Voronoi tessellations
• CALIFA, the Calar Alto Legacy Integral Field Area survey: I. Survey presentation
• The SAURON project - V. Integral-field emission-line kinematics of 48 elliptical and lenticular galaxies
• A large stellar evolution database for population synthesis studies. II. Stellar models and isochrones for an alpha-enhanced metal distribution
• Structural Properties of Pseudo-Bulges, Classical Bulges and Elliptical Galaxies: an SDSS Perspective
• The Frequency of Barred Spiral Galaxies in the Near-IR
• The Spitzer Survey of Stellar Structure in Galaxies (S^4G)
• Improved Estimates of the Milky Way's Stellar Mass and Star Formation Rate from Hierarchical Bayesian Meta-Analysis
• The Nuclear Bulge of the Galaxy. III. Large-Scale Physical Characteristics of Stars and Interstellar Matter
• Evolution of the Bar Fraction in COSMOS: Quantifying the Assembly of the Hubble Sequence
• A Near-Infrared Study of 2MASS Bars in Local Galaxies: An Anchor for High Redshift Studies
• The Structure of the Milky Way's Bar Outside the Bulge
• Evolutionary stellar population synthesis with MILES - II. Scaled-solar and α-enhanced models
• A Classical Morphological Analysis of Galaxies in the Spitzer Survey of Stellar Structure in Galaxies (S4G)
• The population of barred galaxies in the local universe I. Detection and characterisation of bars
• Galaxy Zoo: Bars in Disk Galaxies
• Secular Evolution Via Bar-Driven Gas Inflow: Results from BIMA SONG
• The SAURON project - VII. Integral-field absorption and emission-line kinematics of 24 spiral galaxy bulges
• How Large Are the Bars in Barred Galaxies?
• Bars in Disk-Dominated and Bulge-Dominated Galaxies at z~0: New Insights from ~3600 SDSS Galaxies
• AINUR: Atlas of Images of NUclear Rings
• The life-time of galactic bars: central mass concentrations and gravity torques
• The impact of gas inflows on star formation rates and metallicities in barred galaxies
• Star formation history of barred disc galaxies
• The Dependence of Bar Frequency on Galaxy Mass, Colour, and Gas Content -- and Angular Resolution -- in the Local Universe
• The two-phase formation history of spiral galaxies traced by the cosmic evolution of the bar fraction
• Can bars be destroyed by a central mass concentration? I. Simulations
• The Carnegie-Irvine Galaxy Survey. I. Overview and Atlas of Optical Images
• On the Fraction of Barred Spiral Galaxies
• Signatures of radial migration in barred galaxies: Azimuthal variations in the metallicity distribution of old stars
• Chemodynamics of barred galaxies in cosmological simulations: On the Milky Way's quiescent merger history and in-situ bulge
• Galaxy Zoo: An independent look at the evolution of the bar fraction over the last eight billion years from HST-COSMOS
• The interplay between a galactic bar and a supermassive black hole: nuclear fueling in a sub-parsec resolution galaxy simulation
• A large stellar evolution database for population synthesis studies. V. Stellar models and isochrones with CNONa abundance anticorrelations
• Composite Bulges: The Coexistence of Classical Bulges and Disky Pseudobulges in S0 and Spiral Galaxies
• The impact of bars on disk breaks as probed by S4G imaging
• Time Inference with MUSE in Extragalactic Rings (TIMER): Properties of the Survey and High-Level Data Products
• AMUSE-Virgo II. Down-sizing in black hole accretion
• Catalogue of the morphological features in the Spitzer Survey of Stellar Structure in Galaxies (S${}^4$G)
• The MUSE Atlas of Disks (MAD): Resolving Star Formation Rates and Gas Metallicities on < 100pc Scales
• Structure and star formation in disk galaxies III. Nuclear and circumnuclear H alpha emission
• Kinematic signatures of nuclear discs and bar-driven secular evolution in nearby galaxies of the MUSE TIMER project
• First Look at z > 1 Bars in the Rest-Frame Near-Infrared with JWST Early CEERS Imaging
• Bars rejuvenating bulges? Evidence from stellar population analysis
• The formation of stellar nuclear discs in bar-induced gas inflows
• The GIST Pipeline: A Multi-Purpose Tool for the Analysis and Visualisation of (Integral-field) Spectroscopic Data
• The Frequency and Stellar-Mass Dependence of Boxy/Peanut-Shaped Bulges in Barred Galaxies
• Gaseous Structures in Barred Galaxies: Effects of the Bar Strength
• The BaSTI Stellar Evolution Database: models for extremely metal-poor and super-metal-rich stellar populations
• The inside-out formation of nuclear discs and the absence of old central spheroids in barred galaxies of the TIMER survey
• Quantifying stellar radial migration in an N-body simulation: blurring, churning, and the outer regions of galaxy discs
• Effects of Gas on Formation and Evolution of Stellar Bars and Nuclear Rings in Disk Galaxies
• Hot Disks And Delayed Bar Formation
• Revisiting the tension between fast bars and the $\Lambda$CDM paradigm
• Bars in early- and late-type disks in COSMOS
• MUSE tells the story of NGC 4371: The dawning of secular evolution
• Confirmation of a Kinematic Diagnostic for Face-On B/P Bulges
• A close look at secular evolution: Boxy/peanut bulges reduce gas inflow to the central kiloparsec
• Unveiling the Structure of Barred Galaxies at 3.6 $\mu \mathrm{m}$ with the Spitzer Survey of Stellar Structure in Galaxies (S${}^4$G): I. Disk Breaks
• Age Dating the Galactic Bar with the Nuclear Stellar Disc
• Barred Galaxies in the IllustrisTNG Simulation
• A dynamical mechanism for the origin of nuclear rings
• Spiral structure in nearby galaxies II. comparative analysis and conclusions
• Jeans modelling of the Milky Way's nuclear stellar disc
• The Vertical Stellar Kinematics in Face-On Barred Galaxies: Estimating the Ages of Bars
• Clocking the assembly of double-barred galaxies with the MUSE TIMER project
• Inner bars also buckle. The MUSE TIMER view of the double-barred galaxy NGC 1291
• A new method for age-dating the formation of bars in disc galaxies: The TIMER view on NGC1433's old bar and the inside-out growth of its nuclear disc
• Observational constraints to boxy/peanut bulge formation time
• Bar-like galaxies in IllustrisTNG
• Mira variables in the Milky Way's nuclear stellar disc: discovery and classification
• Exploring stellar and ionized gas non--circular motions in barred galaxies with MUSE
• Nuclear Stellar Populations in the Infrared Space Observatory Atlas of Bright Spiral Galaxies
• Angular momentum redistribution and the evolution and morphology of bars
• Nuclear discs as clocks for the assembly history of early-type galaxies: the case of NGC4458
• The young nuclear stellar disc in the SB0 galaxy NGC 1023

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