65 citations · 229 across the 20 of their papers we have counts for
21 papers
The Environmental Switch in Black Hole Feeding: Bar-Driven vs. Merger-Driven Growth in IllustrisTNG50
Harsh Uttam, Sandeep Kumar Kataria
The relative roles of secular disc processes and galaxy interactions in driving the growth of supermassive black hole (SMBH) remain unclear. We present a time-resolved, per galaxy…
The Role of Inner Halo Angular Momentum (Spin) in Shaping Dark Matter Bars in Milky Way Analogs
Shouvik Ghosh, Sandeep Kumar Kataria
Studies of galactic bars have primarily focused on stellar bars, since they can be directly observed through ultraviolet to infrared wavebands. Cosmological as well as idealised si…
Can A Kinematically Hot and Thick Disk Form A Bar? : Role of Highly Spinning Dark Matter Halos
Sandeep Kumar Kataria
Recent JWST observations claim the existence of a significant fraction of bars in the kinematically hotter and thicker disk at high redshift Universe. These observations challenge…
Dependency of the Bar Formation Timescale On The Halo Spin
Bin-Hui Chen, Sandeep Kumar Kataria, Juntai Shen +1
Bars are among the most prominent structures in disk galaxies. While the widely accepted swing-amplification theory provides a qualitative framework for their formation, the detail…
Is Milky Way gravitationally stable? A TNG50 view from cosmic noon to the present day
K. Aditya, Sandeep Kataria
We investigate the stability of Milky Way analogs (MWAs) in the \texttt{TNG50} simulation against the growth of local axisymmetric instabilities, tracing their evolution from cosmi…
Orbital Support and Evolution of CX/OX Structures in Boxy/Peanut Bars
Behzad Tahmasebzadeh, Shashank Dattathri, Monica Valluri +7
Barred galaxies exhibit boxy/peanut or X-shapes (BP/X) protruding from their disks in edge-on views. Two types of BP/X morphologies exist depending on whether the X-wings meet at t…
How do the successive buckling events affect a galaxy bar and stellar disk? Potential Observable Signatures For Spotting the Buckling Action -- I
Sandeep Kumar Kataria
Until now, observations have caught up only a handful of galaxies in ongoing buckling action. Interestingly, N-body simulations over the past several decades show that almost every…
Importance of Initial Condition on Bar Secular Evolution: Role of Halo Angular Momentum Distribution Discontinuity
Sandeep Kumar Kataria, Juntai Shen
The dark matter halo properties, for example, mass, spin and concentration play a significant role in the formation and evolution of bars in disk galaxies. This study highlights th…
Origin of reduced dynamical friction by dark matter halos with net prograde rotation
Rimpei Chiba, Sandeep Kumar Kataria
We provide an explanation for the reduced dynamical friction on galactic bars in spinning dark matter halos. Earlier work based on linear theory predicted an increase in dynamical…
How does the presence of bar affects the fueling of supermassive black holes ? An IllustrisTNG100 perspective
Sandeep Kumar Kataria, M. Vivek
We conduct a statistical study of black hole masses of barred and unbarred galaxies in the IllustrisTNG100 cosmological magneto-hydrodynamical simulations. This work aims to unders…
Dark Matter Halo Spin of the Dwarf Galaxy UGC 5288: Insights from Observations, N-body and Cosmological Simulations
Sioree Ansar, Sandeep K Kataria, Mousumi Das
Dark matter (DM) halo angular momentum is very challenging to determine from observations of galaxies. In this study, we present a new hybrid method of estimating the dimensionless…
Modelling Dark Matter Halo Spin using Observations and Simulations: application to UGC 5288
Sioree Ansar, Sandeep Kumar Kataria, Mousumi Das
Dark matter (DM) halo properties are extensively studied in cosmological simulations but are very challenging to estimate from observations. The DM halo density profile of observed…
Effects of Inner Halo Angular Momentum on the Peanut/X-shapes of Bars
Sandeep Kumar Kataria, Juntai Shen
Cosmological simulations show that dark matter halos surrounding baryonic disks have a wide range of angular momenta, measured by the spin parameter (). In this study, we bring…
Excitation of vertical breathing motion in disc galaxies by tidally-induced spirals in fly-by interactions
Ankit Kumar, Soumavo Ghosh, Sandeep Kumar Kataria +2
It is now clear that the stars in the Solar neighbourhood display large-scale coherent vertical breathing motions. At the same time, Milky Way-like galaxies experience tidal intera…
Growth of disc-like pseudo-bulges in SDSS DR7 since z = 0.1
Ankit Kumar, Sandeep Kumar Kataria
Cosmological simulations predict more classical bulges than their observational counterpart in the local Universe. Here, we quantify evolution of the bulges since using pho…
The Effect of Dark Matter Halo Shape on Bar Buckling and Boxy/Peanut Bulges
Ankit Kumar, Mousumi Das, Sandeep Kumar Kataria
It is well established that bars evolve significantly after they form in galaxy discs, often changing shape both in and out of the disc plane. In some cases they may bend or buckle…
Galaxy Flybys: Evolution of the Bulge, Disk, and Spiral Arms
Ankit Kumar, Mousumi Das, Sandeep Kumar Kataria
Galaxy flybys are as common as mergers in low redshift universe and are important for galaxy evolution as they involve the exchange of significant amounts of mass and energy. In th…
Testing a theoretical prediction for bar formation in galaxies with bulges
Sandeep Kumar Kataria, Mousumi Das, Sudhanshu Barway
Earlier studies have shown that massive bulges impede bar formation in disk galaxies. Recent N-body simulations have derived a bar formation criterion that depends on the radial bu…
Can Bars Erode Cuspy Halos ?
Sandeep Kumar Kataria, Mousumi Das, Stacy McGaugh
One of the major and widely known small scale problem with the Lambda CDM model of cosmology is the core-cusp problem. In this study we investigate whether this problem can be reso…
The Effect of Bulge Mass on Bar Pattern Speed in Disk Galaxies
Sandeep Kumar Kataria, Mousumi Das
We present a study of the effect of bulge mass on the evolution of bar pattern speed in isolated disk galaxies using N-body simulations. Earlier studies have shown that disk stars…
A Study of the Effect of Bulges on Bar Formation in Disk galaxies
Sandeep Kumar Kataria, Mousumi Das
We use N-body simulations of bar formation in isolated galaxies to study the effect of bulge mass and bulge concentration on bar formation. Bars are global disk instabilities that…