The study of two barred galaxies with curious kinematical features
arXiv:1705.04629 · doi:10.1093/mnras/stx1200
Abstract
We performed long-slit spectral observations of two SB-type galaxies: NGC 5347, UGC 1344. They were previously suspected as the galaxies with unusually low mass-to-light ratios (on the ground of mass estimates from the Hi linewidths), which are in conflict with their observed colours. The observations were conducted at the Russian 6-m telescope. The aim of the study was to clarify the kinematics and structure, as well as the properties of stellar populations of the galaxies. The results of observations disproved the peculiarly low mass-to-light ratios of both galaxies. The most probable reasons of underestimation of their masses are discussed. We tried to reproduce the main observed features of kinematical profiles of the galaxies in the N-body simulations of barred galaxies. We found that both galaxies possess central components of different structure. Indeed, the age and velocity dispersion of stellar population in NGC 5347 are low in its innermost part in comparison to that of the bulge or a bar, which agrees with the presence of nuclear kinematically decoupled disc. It probably was formed due to the bar which supplied the inner region with gas. The kinematical profiles of the second galaxy UGC 1344 give evidences in favour of the central peanut-shaped bulge. In spite of the different luminosities of the two galaxies, they possess nearly equal (close to solar) central stellar abundance and the flattening of the stellar metallicity gradient in the bar regions. However, in the less luminous NGC 5347 the mean stellar age is younger than that in UGC 1344.
arXiv comment14 pages, 11 figures, 3 tables, accepted for publication in MNRAS
References in corpus (44)
- On the variation of the Initial Mass Function
- Stellar mass-to-light ratios and the Tully-Fisher relation
- The Initial Mass Function of Stars: Evidence for Uniformity in Variable Systems
- A Universal Stellar Initial Mass Function? A Critical Look at Variations
- HyperLEDA. III. The catalogue of extragalactic distances
- What determines the strength and the slowdown rate of bars ?
- Constraints from Dynamical Friction on the Dark Matter Content of Barred Galaxies
- Evolution of Stellar Bars in Live Axisymmetric Halos: Recurrent Buckling and Secular Growth
- A New Mechanism for Radial Migration in Galactic Disks: Spiral-Bar Resonance Overlap
- The SCORPIO focal reducer
- Evolutionary synthesis of galaxies at high spectral resolution with the code PEGASE-HR
- Secular Evolution Via Bar-Driven Gas Inflow: Results from BIMA SONG
- The Destruction of Bars by Central Mass Concentrations
- The impact of gas inflows on star formation rates and metallicities in barred galaxies
- Bar Diagnostics in Edge-On Spiral Galaxies. III. N-Body Simulations of Disks
- The Westerbork HI Survey of spiral and irregular galaxies III: HI observations of early-type disk galaxies
- Circumnuclear Dust in Nearby Active and Inactive Galaxies. I. Data
- Stellar Kinematics of Boxy Bulges: Large-Scale Bars and Inner Disks
- Bars rejuvenating bulges? Evidence from stellar population analysis
- The formation of stellar nuclear discs in bar-induced gas inflows
- Kinematics and stellar populations of the dwarf elliptical galaxy IC 3653
- Observational Constraints on Disk Heating as a Function of Hubble Type
- Stellar Populations in Bulges
- Gaseous Structures in Barred Galaxies: Effects of the Bar Strength
- Do Circumnuclear Dense Gas Disks Drive Mass Accretion onto Supermassive Black Holes?
- Bar-induced central star formation as revealed by integral field spectroscopy from CALIFA
- Spatially resolved variations of the IMF mass normalisation in early-type galaxies as probed by molecular gas kinematics
- Study of stellar populations in the bulges of barred galaxies
- On the Lengths, Colors and Ages of 18 Face-On Bars
- The BaLROG project - I. Quantifying the influence of bars on the kinematics of nearby galaxies
- Stellar counter-rotation in lenticular galaxy NGC 448
- New light on the formation and evolution of bars: Trends in the stellar line-strength indices distribution inside the bar region
- Lenticular galaxy IC 719: current building of the counterrotating large-scale stellar disk
- The BaLROG project - II. Quantifying the influence of bars on the stellar populations of nearby galaxies
- Numerical code for multi-component galaxies: from N-body to chemistry and magnetic fields
- Long slit spectroscopy of a sample of isolated spirals with and without an AGN
- Inner rings in disc galaxies: dead or alive
- Companions of Bright Barred Shapley Ames Galaxies
- Spiral galaxies with non-typical mass-to-light ratios
- Do Disk Galaxies with Abnormally Low Mass-to-Light Ratios Exist?
- Star Formation History at the Centers of Lenticular Galaxies with Bars and Purely Exponential Outer Disks from SAURON Data
- Long-slit spectral observations and stellar mass-to-light ratio of spiral galaxy UGC11919
- WSRT observations and surface photometry of two unusual spiral galaxies
- Evidence Supporting the Universality of the IMF
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