66 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Inter-University Centre for Astronomy and AstrophysicsIN25 papers
- Indian Institute of Technology BombayIN9 papers
- Homi Bhabha National InstituteIN8 papers
- Tata Institute of Fundamental ResearchIN8 papers
- Kavli Institute for Particle Astrophysics and CosmologyUS7 papers
- Physical Research LaboratoryIN7 papers
- Centre National de la Recherche ScientifiqueFR6 papers
- University of LouisvilleUS6 papers
- Indian Statistical Institute, Delhi CentreIN5 papers
- Stanford UniversityUS5 papers
- Indian Institute of AstrophysicsIN4 papers
- Indian Institute of Technology KanpurIN4 papers
22 papers · 1 filter
Fast-varying time lags in the Quasi-periodic Oscillation in GRS 1915+105
Tomaso M. Belloni, Mariano Mendez, Federico Garcia +1
The properties of sub-second time variability of the X-ray emission of the black-hole binary GRS 1915+105 are very complex and strictly connected to its patterns of variability obs…
Ordering and topological defects in social wasps' nests
Shivani Krishna, Apoorva Gopinath, Somendra M. Bhattacharjee
Social insects have evolved a variety of architectural formations. Bees and wasps are well known for their ability to achieve compact structures by building hexagonal cells. Polist…
Complex dynamics approach to dynamical quantum phase transitions: the Potts model
Somendra M. Bhattacharjee
This paper introduces complex dynamics methods to study dynamical quantum phase transitions in the one- and two-dimensional quantum 3-state Potts model. The quench involves switchi…
Embedding Ultra slow-roll inflaton dynamics in Warm Inflation
Sandip Biswas, Kaushik Bhattacharya, Suratna Das
Slow-roll of the inflaton field defines the standard dynamics of the inflationary epoch. However, the inflationary system deviates from slow-roll when it encounters an extremely fl…
Homology reveals significant anisotropy in the cosmic microwave background
Pratyush Pranav, Thomas Buchert
We test the tenet of statistical isotropy of the standard cosmological model via a homology analysis of the cosmic microwave background temperature maps. Examining small sectors of…
Shedding light on the MRI driven dynamo in a stratified shearing box
Prasun Dhang, Abhijit Bendre, Kandaswamy Subramanian
We study the magneto-rotational instability (MRI) driven dynamo in a geometrically thin disc () using stratified zero net flux (ZNF) shearing box simulations. We find tha…
How fast do rumours spread?
Rishideep Roy, Kumarjit Saha
We study a rumour propagation model along the lines of \cite{lebensztayn2008disk} as a long-range percolation model on . We begin by showing a sharp phase transition-type behav…
Iterative removal of sources to model the turbulent electromotive force
Abhijit B. Bendre, Jennifer Schober, Prasun Dhang +1
We describe a novel method to compute the components of dynamo tensors from direct magnetohydrodynamic (MHD) simulations. Our method relies upon an extension and generalisation of…
A sheet-like structure in the proximity of compact DNA
Garima Mishra, Somendra M. Bhattacharjee
We determine the phase diagram of DNA with inter- and intra-strand native-pair interactions that mimic the compaction of DNA. We show that DNA takes an overall sheet-like structure…
Prospects of measuring Gamma-ray Burst Polarisation with the Daksha mission
Suman Bala, Sujay Mate, Advait Mehla +11
The proposed Daksha mission comprises of a pair of highly sensitive space telescopes for detecting and characterising high-energy transients such as electromagnetic counterparts of…
Stability analysis of warm quintessential dark energy model
Suratna Das, Saddam Hussain, Debottam Nandi +2
A dynamical system analysis is performed for a model of dissipative quintessential inflation realizing warm inflation at early primordial times and dissipative interations in the d…
High hard X-ray polarization in Cygnus X-1 confined to the intermediate hard state: evidence for a variable jet component
Tanmoy Chattopadhyay, Abhay Kumar, A. R. Rao +7
Cygnus X-1, the well-known accreting black hole system, exhibits several observational features hinting at an intricate interplay between the accretion disk, its atmosphere known a…
Role of magnetic pressure forces in fluctuation dynamo saturation
Sharanya Sur, Kandaswamy Subramanian
Using magnetohydrodynamic simulations of fluctuation dynamos in turbulent flows with rms Mach numbers and , we show that magnetic pressure for…
Traceable mixnets
Prashant Agrawal, Abhinav Nakarmi, Mahavir Prasad Jhawar +2
We introduce the notion of \emph{traceable mixnets}. In a traditional mixnet, multiple mix-servers jointly permute and decrypt a list of ciphertexts to produce a list of plaintexts…
Krylov construction and complexity for driven quantum systems
Amin A. Nizami, Ankit W. Shrestha
Krylov complexity is an important dynamical quantity with relevance to the study of operator growth and quantum chaos, and has recently been much studied for various time-independe…
Contrasting X-ray/UV time-lags in Seyfert 1 galaxies NGC 4593 and NGC 7469 using AstroSat observations
Kavita Kumari, G. C. Dewangan, I. E. Papadakis +6
We study accretion disk-corona connection in Seyfert 1 galaxies using simultaneous UV/X-ray observations of NGC 4593 (July 14-18, 2016) and NGC 7469 (October 15-19, 2017) performed…
Extragalactic magnetism with SOFIA (SALSA Legacy Program) -- V: First results on the magnetic field orientation of galaxies
Alejandro S. Borlaff, Enrique Lopez-Rodriguez, Rainer Beck +13
We present the analysis of the magnetic field (-field) structure of galaxies measured with far-infrared (FIR) and radio (3 and 6 cm) polarimetric observations. We use the first…
Remnants of recent mergers in nearby early-type galaxies and their classification
Gourab Giri, Sudhanshu Barway, Somak Raychaudhury
We search for signatures of recent galaxy close interactions and mergers in a sample of 202 early-type galaxies in the local universe from the public SDSS Stripe82 deep images ($μ_…
Dashing through the cluster: An X-ray to radio view of UGC 10420 undergoing ram-pressure stripping
Smriti Mahajan, Kulinder Pal Singh, Juhi Tiwari +1
We present multi-wavelength data and analysis, including new FUV AstroSat/UVIT observations of the spiral galaxy UGC 10420 (z=0.032), a member of the cluster Abell 2199. UGC 10420…
Generation of Highlights from Research Papers Using Pointer-Generator Networks and SciBERT Embeddings
Tohida Rehman, Debarshi Kumar Sanyal, Samiran Chattopadhyay +2
Nowadays many research articles are prefaced with research highlights to summarize the main findings of the paper. Highlights not only help researchers precisely and quickly identi…
Running and running of the running of the scalar spectral index in warm inflation
Suratna Das, Rudnei O. Ramos
Next generation of cosmological observations are expected to improve the measurements of several quantities connected to the primordial inflation in the early Universe. These quant…
An uncountable number of proofs of Pythagoras Theorem
Gaurav Bhatnagar, Sagar Shrivastava
We give an infinite number of proofs of Pythagoras theorem.Some can be classified as `self-similar proofs'.