5 citations · 16 across the 11 of their papers we have counts for
12 papers · 1 filter
Tracing black hole and galaxy growth across environments since cosmic noon
Emma Jane Weller, Priyamvada Natarajan, Colin J. Burke +1
The distribution of systems in the black hole (BH) mass-stellar mass () plane encodes both the integrated growth of galaxies and their central black holes, a…
Self-interacting dark matter promotes bar formation in disk galaxies
Shashank Dattathri, Frank C. van den Bosch, HanYuan Zhang +4
Despite its remarkable success on large scales, the standard CDM paradigm faces persistent small-scale challenges that have motivated alternative models for the dark sector. Sel…
A Kiloparsec-Scale Stellar Cavity in the Center of Abell402-BCG May be Caused by Dynamic Interactions with an Ultramassive Black Hole
Michael McDonald, Gourav Khullar, David Lagattuta +18
We present new observations from JWST NIRCam that reveal a striking kpc-wide cavity in the stellar distribution of the central galaxy in the cluster Abell402. Supporting data from…
JWST Observations of the Double Nucleus in NGC 4486B: Possible Evidence for a Recent Binary SMBH Merger and Recoil
Behzad Tahmasebzadeh, Monica Valluri, Shashank Dattathri +19
A recent study of the compact elliptical galaxy NGC 4486B using JWST-NIRSpec IFU kinematics confirmed a supermassive black hole (SMBH) of mass (~8% of…
Dynamics in the Cores of Self-Interacting Dark Matter Halos: Reduced Stalling and Accelerated Core Collapse
Frank C. van den Bosch, Shashank Dattathri
Self-interacting dark matter (SIDM) is an intriguing alternative to the standard cold dark matter (CDM) paradigm, which predicts that dark matter halos typically have large, isothe…
Not all cores are equal: Phase-space origins of dynamical friction, stalling and buoyancy
Shashank Dattathri, Frank C. van den Bosch, Uddipan Banik +4
Dynamical friction governs the orbital decay of massive perturbers within galaxies and dark matter halos, yet its standard Chandrasekhar formulation fails in systems with cores of…
The Dipole Instability in Gravitational -body Systems: A Natural Explanation for Lopsidedness and Off-Centered Nuclei in Galaxies
Shashank Dattathri, Frank C. van den Bosch, Martin D. Weinberg +1
We explore the stability of isotropic, spherical, self-gravitating systems with a double-power law density profile. Systems with rapid transitions between the inner and outer slope…
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…
The redshift evolution of the scaling relation: new insights from cosmological simulations and semi-analytic models
Shashank Dattathri, Priyamvada Natarajan, Antonio J. Porras-Valverde +4
We study the co-evolution of black holes (BHs) and their host galaxies in the ASTRID and Illustris-TNG300 cosmological simulations and the Dark Sage Semi-Analytic Model (SAM), focu…
Deprojection and stellar dynamical modelling of boxy/peanut bars in edge-on discs
Shashank Dattathri, Monica Valluri, Eugene Vasiliev +2
We present a new method to infer the 3D dimensional luminosity distributions of edge-on barred galaxies with boxy-peanut/X (BP/X) shaped structures from their 2D surface brightness…
Early Growing Supermassive Black Holes Strengthen Bars and Boxy/Peanut Bulges
Vance Wheeler, Monica Valluri, Leandro Beraldo e Silva +2
Using N-body simulations we explore the effects of growing a supermassive black hole (SMBH) prior to or during the formation of a stellar bar. Keeping the final mass and growth rat…
Cosmological evolution of gas and supermassive black holes in idealized isolated halos
Shashank Dattathri, Prateek Sharma
We study the evolution of baryonic gas in cosmologically growing dark matter halos. To accurately model both the inner and outer regions of the halos, we use a dark matter density…