The Diversity of Thick Galactic Discs

Abstract

Although thick stellar discs are detected in nearly all edge-on disc galaxies, their formation scenarios still remain a matter of debate. Due to observational difficulties, there is a lack of information about their stellar populations. Using the Russian 6-m telescope BTA we collected deep spectra of thick discs in three edge-on S0-a disc galaxies located in different environments: NGC4111 in a dense group, NGC4710 in the Virgo cluster, and NGC5422 in a sparse group. We see intermediate age (4-5 Gyr) metal rich ([Fe/H] $\sim$ -0.2 - 0.0 dex) stellar populations in NGC4111 and NGC4710. On the other hand, NGC5422 does not harbour young stars, its disc is thick and old (10 Gyr), without evidence for a second component, and its $\alpha$-element abundance suggests a 1.5-2 Gyr long formation epoch implying its formation at high redshift. Our results suggest the diversity of thick disc formation scenarios.

arXiv commentAccepted for publication in MNRAS Letters, 6 pages, 3 figures, 1 table

References in corpus (40)

• The epochs of early-type galaxy formation as a function of environment
• The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances
• The Chemical Evolution of the Galaxy: the two-infall model
• HyperLEDA. III. The catalogue of extragalactic distances
• Stellar population models of Lick indices with variable element abundance ratios
• The ACS Virgo Cluster Survey. XIII. SBF Distance Catalog and the Three-Dimensional Structure of the Virgo Cluster
• A Merger-Driven Scenario for Cosmological Disk Galaxy Formation
• The Atlas3D Project - XXX. Star formation histories and stellar population scaling relations of early-type galaxies
• The Atlas3D project -- XIII. Mass and morphology of HI in early-type galaxies as a function of environment
• The SCORPIO focal reducer
• The thick disks of spiral galaxies as relics from gas-rich, turbulent, clumpy disks at high redshift
• Origin and structure of the Galactic disc(s)
• Evolutionary synthesis of galaxies at high spectral resolution with the code PEGASE-HR
• The Genesis of the Milky Way's Thick Disk via Stellar Migration
• Kinematics of the Local Universe XIII. 21-cm line measurements of 452 galaxies with the Nançay radiotelescope, JHK Tully-Fisher relation and preliminary maps of the peculiar velocity field
• The Nature of Boxy/Peanut-Shaped Bulges in Spiral Galaxies
• A Structural and Dynamical Study of Late-Type, Edge-On Galaxies: II. Vertical Color Gradients and the Detection of Ubiquitous Thick Disks
• On the Formation of Galactic Thick Disks
• Ages of galaxy bulges and disks from optical and near-infrared colors
• Observations of Thick Disks in the Hubble Space Telescope Ultra Deep Field
• An Atlas of Halpha and R Images and Radial Profiles of 63 Bright Virgo Cluster Spiral Galaxies
• Galactic Bulges from HST-NICMOS Observations: Ages and Dust
• Breaks in thin and thick discs of edge-on galaxies imaged in the Spitzer Survey of Stellar Structure in Galaxies (S4G)
• Kinematics and stellar populations of the dwarf elliptical galaxy IC 3653
• The Effects of Radial Migration on the Vertical Structure of Galactic Discs
• Characteristics of thick disks formed through minor mergers: stellar excesses and scale lengths
• The GalMer database: Galaxy Mergers in the Virtual Observatory
• Lick Indices in the Thin and Thick Disks of Edge-On Disk Galaxies
• Ages and abundances in large-scale stellar disks of nearby S0 galaxies
• Evidence for the concurrent growth of thick discs and central mass concentrations from S${}^4$G imaging
• New release of the ELODIE library: Version 3.1
• The properties of early-type galaxies in the Ursa Major cluster
• NGC 6340: an old S0 galaxy with a young polar disc. Clues from morphology, internal kinematics and stellar populations
• A blind HI survey in the Ursa Major region
• Large scale nested stellar discs in NGC 7217
• The thick disk rotation-metallicity correlation as a fossil of an "inverse chemical gradient" in the early Galaxy
• Anatomy of Ursa Majoris
• A new sky subtraction technique for low surface brightness data
• Properties of Stellar Populations in Isolated Lenticular Galaxies
• Gas accretion in disk galaxies

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