Stellar nuclei and inner polar disks in lenticular galaxies

Abstract

I analyze statistics of the stellar population properties for stellar nuclei and bulges of nearby lenticular galaxies in different environments by using panoramic spectral data of the integral-field spectrograph SAURON retrieved from the open archive of Isaac Newton Group. I estimate also the fraction of nearby lenticular galaxies having inner polar gaseous disks by exploring the volume-limited sample of early-type galaxies of the ATLAS-3D survey. By inspecting the two-dimensional velocity fields of the stellar and gaseous components with running tilted-ring technique, I have found 7 new cases of the inner polar disks. Together with those, the frequency of inner polar disks in nearby S0 galaxies reaches 10% that is much higher than the frequency of large-scale polar rings. Interestingly, the properties of the nuclear stellar populations in the inner polar ring hosts are statistically the same as those in the whole S0 sample implying similar histories of multiple gas accretion events from various directions.

arXiv comment25 pages, 13 figures

References in corpus (49)

• The Atlas3D project -- I. A volume-limited sample of 260 nearby early-type galaxies: science goals and selection criteria
• Stellar population models of Lick indices with variable element abundance ratios
• The SAURON project - V. Integral-field emission-line kinematics of 48 elliptical and lenticular galaxies
• The Stellar Population Histories of Early-Type Galaxies. II. Controlling Parameters of the Stellar Populations
• The Stellar Population Histories of Local Early-Type Galaxies. I. Population Parameters
• The SAURON project. I. The panoramic integral-field spectrograph
• The SAURON project. II. Sample and early results
• The ATLAS3D project - II. Morphologies, kinemetric features and alignment between photometric and kinematic axes of early-type galaxies
• The Atlas3D Project - XXX. Star formation histories and stellar population scaling relations of early-type galaxies
• The Atlas3D project - VII. A new look at the morphology of nearby galaxies: the kinematic morphology-density relation
• Quantifying the Fragility of Galactic Disks in Minor Mergers
• A Constant Molecular Gas Depletion Time in Nearby Disk Galaxies
• The Atlas3D project -- IV: the molecular gas content of early-type galaxies
• The Atlas3D project -- XIII. Mass and morphology of HI in early-type galaxies as a function of environment
• Population Synthesis in the Blue IV: Accurate Model Predictions for Lick Indices and UBV Colors in Single Stellar Populations
• Oxygen and nitrogen abundances in nearby galaxies. Correlations between oxygen abundance and macroscopic properties
• The Atlas3D project - X. On the origin of the molecular and ionised gas in early-type galaxies
• The Metallicity of Galaxy Disks: Infall versus Outflow
• Multicomponent Decompositions for a Sample of S0 galaxies
• The SAURON project - VI. Line strength maps of 48 elliptical and lenticular galaxies
• Bulge-Disk Decomposition of 659 Spiral and Lenticular Galaxy Brightness Profiles
• Star formation histories of early-type galaxies. I: Higher order Balmer lines as age indicators
• Formation of polar ring galaxies
• Photometric scaling relations of lenticular and spiral galaxies
• The ATLAS3D project - XVII. Linking photometric and kinematic signatures of stellar discs in early-type galaxies
• The Atlas3D project -- XXVII. Cold Gas and the Colours and Ages of Early-type Galaxies
• The Cool ISM in S0 Galaxies. I. A Survey of Molecular Gas
• Ionized gas and stellar kinematics of seventeen nearby spiral galaxies
• The HI content of early-type galaxies from the ALFALFA survey. II. The case of low density environments
• A new catalogue of polar-ring galaxies selected from the SDSS
• The Cool ISM in Elliptical Galaxies. II. Gas Content in the Volume - Limited Sample and Results from the Combined Elliptical and Lenticular Surveys
• Structure and kinematics of candidate double-barred galaxies
• A COMPARATIVE STUDY OF MORPHOLOGICAL CLASSIFICATIONS OF APM GALAXIES
• The Formation of Polar Disk Galaxies
• A new catalogue of ISM content of normal galaxies
• Gas Mass Fractions and Star Formation in Blue-Sequence E/S0 Galaxies
• Minor-axis velocity gradients in spirals and the case of inner polar disks
• Ages and abundances in large-scale stellar disks of nearby S0 galaxies
• Stellar Populations in Nearby Lenticular Galaxies
• Building gas rings and rejuvenating S0 galaxies through minor mergers
• Decoupled gas kinematics in isolated S0 galaxies
• Nature of nuclear rings in unbarred galaxies: NGC 7742 and NGC 7217
• Catalog of Nearby Isolated Galaxies in the Volume z<0.01
• Star Formation Histories of Nearby Elliptical Galaxies: I. Volume Limited Sample
• Global Emission Line Trends in Spiral Galaxies: The Reddening and Metallicity Sequences
• Lenticular galaxies at the outskirts of the Leo II group: NGC 3599 and NGC 3626
• Stars and ionized gas in S0 galaxy NGC 7743: an inclined large-scale gaseous disk
• Inner Polar Rings and Disks: Observed Properties
• Properties of Stellar Populations in Isolated Lenticular Galaxies

Cited by in corpus (6)

• The gas kinematics, excitation, and chemistry, in connection with star formation, in lenticular galaxies
• Disky elliptical galaxies and the allegedly over-massive black hole in the compact massive `ES' galaxy NGC 1271
• Double-peak emission line galaxies in the SDSS catalogue. A minor merger sequence
• Star-forming rings in lenticular galaxies: origin of the gas
• Active galactic nuclei among polar-ring galaxies
• COUGS-DESI: A Catalog of Unusual Galaxies with Polar Structures in the DESI Legacy Imaging Surveys