A5028963485- Neutrino Physics Research
- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Folklore, Mythology, and Literature Studies
- Black Holes and Theoretical Physics
- Particle Detector Development and Performance
- Cosmology and Gravitation Theories
- Radiation Detection and Scintillator Technologies
- Indian and Buddhist Studies
- Pulsars and Gravitational Waves Research
- Themes in Literature Analysis
- Second Language Learning and Teaching
- Astrophysical Phenomena and Observations
- Atomic and Subatomic Physics Research
- Stellar, planetary, and galactic studies
- Digital Humanities and Scholarship
- South Asian Cinema and Culture
- Literature, Magical Realism, García Márquez
- Nuclear Physics and Applications
- Relativity and Gravitational Theory
- Teaching and Learning Programming
ARC Centre of Excellence for All-sky Astrophysics
2024
Indira Gandhi National Open University
2018-2024
ASTRO-3D
2024
UNSW Sydney
2024
Indian Institute of Technology Hyderabad
2020-2023
Swinburne University of Technology
2019-2023
ARC Centre of Excellence for Gravitational Wave Discovery
2019-2023
University of the Sunshine Coast
2020
Maharaja Sriram Chandra Bhanja Deo University
2006
Abstract Analyzing a sample of 84 early-type galaxies (ETGs) with directly measured supermassive black hole masses—nearly doubling the size such multicomponent decompositions—a symmetric linear regression on reduced (merger-free) 76 reveals <?CDATA ${M}_{\mathrm{BH}}\propto {M}_{* ,\mathrm{sph}}^{1.27\pm 0.07}$?> total scatter Δ rms = 0.52 dex in $\mathrm{log}({M}_{\mathrm{BH}})$?> direction. Importantly, however, we discover that ES/S0-type disks are offset from E-type by more than factor...
Tidal features in the outskirts of galaxies yield unique information about their past interactions and are a key prediction hierarchical structure formation paradigm. The Vera C. Rubin Observatory is poised to deliver deep observations for potentially millions objects with visible tidal features, but inference galaxy interaction histories from such not straightforward. Utilising automated techniques human visual classification conjunction realistic mock images produced using NEWHORIZON...
Using 145 early- and late-type galaxies (ETGs LTGs) with directly-measured super-massive black hole masses, $M_{BH}$, we build upon our previous discoveries that: (i) LTGs, most of which have been alleged to contain a pseudobulge, follow the relation $M_{BH}\propto\,M_{*,sph}^{2.16\pm0.32}$; (ii) ETG $M_{BH}\propto\,M_{*,sph}^{1.27\pm0.07}$ is an artifact ETGs with/without disks following parallel $M_{BH}\propto\,M_{*,sph}^{1.9\pm0.2}$ relations are offset by order magnitude in...
We present revised (black hole mass)-(spheroid stellar mass) and mass)-(galaxy scaling relations based on colour-dependent mass-to-light ratios. Our 3.6 micron luminosities were obtained from multicomponent decompositions, which accounted for bulges, discs, bars, ansae, rings, nuclear components, etc. The lenticular galaxy bulges (not associated with recent mergers) follow a steep M_bh~M_{*,bulge}^{1.53+/-0.15} relation, offset by roughly an order of magnitude in black mass the...
ABSTRACT We recently revealed that bulges and elliptical galaxies broadly define distinct, superlinear relations in the (black hole mass, Mbh)–(spheroid stellar M*,sph) diagram or Mbh−M*,sph diagram, with order-of-magnitude lower Mbh/M*,sph ratios due to major (disc-destroying, elliptical-building) dry mergers. Here, we present a more nuanced picture. Galaxy mergers, which net orbital angular momentum does not cancel, can lead systems rotating disc. This situation occur either wet (gas-rich)...
Abstract In this work, we studied the broadband temporal and spectral properties of flat-spectrum radio quasar (FSRQ) Ton 599. We collected long-term data from January 2019 to August 2024 when source was in a long flaring episode. used Bayesian block methodology identify various flux states, including three flares. The fractional variability is estimated during two states. F var variation with respect frequency shows nearly double hump structure similar SED. Power density (PSD) pink-noise...
The study of plant morphology is one the important characteristics that put plants into limelight in form their external structures. It useful identification, including comparative morphological analysis different parts like stems, roots, rhizomes, and flowers same or species. Plant also contains studies characters at macro micro levels. micromorphological includes structures cell level by taking sections observing them microscopically. Due to botanical ambiguity regions India, there a need...
For 123 local galaxies with directly-measured black hole masses ($M_{\rm BH}$), we provide the host spheroid's S\'ersic index ($\rm n_{sph}$), effective half-light radius R_{e,sph}$), and surface brightness ($\mu_e$), obtained from careful multi-component decompositions, use these to derive morphology-dependent $M_{\rm BH}$--$\rm n_{sph}$ R_{e,sph}$ relations. We additionally present *,sph}$--$\rm explored differences due to: early-type (ETGs) versus late-type (LTGs); core-S\'ersic galaxies;...
This paper is the fourth in a series presenting (galaxy morphology, and thus galaxy formation)-dependent black hole mass, $M_{\rm BH}$, scaling relations. We have used sample of 119 galaxies with directly-measured BH}$ host spheroid parameters obtained from multi-component decomposition of, primarily, $3.6\,\mu$m Spitzer images. Here, we investigate correlations between projected luminosity density $\mu$, stellar mass $\Sigma$, deprojected (internal) $\rho$, for various radii. discover...
Purpose The essential purpose of this paper is to measure the amount web resources used for scholarly contributions in area library and information science (LIS) India. It further aims make an analysis nature type studies various standards citations. Design/methodology/approach In study, result 292 citations spread over 95 papers published proceedings National Conference Society Information Science , India (SIS‐2005) has been reported. All were scanned data relating types domains, file...
Abstract Observed evolution of the total mass distribution with redshift is crucial to testing galaxy theories. To measure distribution, strong gravitational lenses complement resolved dynamical observations that are currently limited z ≲ 0.5. Here we present lens models for a pilot sample seven galaxy-scale from ASTRO3D Galaxy Evolution Lenses ( AGEL ) survey. The lenses, modeled using HST/WFC3-F140W images Gravitational Lens Efficient Explorer GLEE software, have deflector redshifts in...
Local early-type galaxies with directly-measured black hole masses, $M_{\rm bh}$, have been reported to represent a biased sample relative the population at large. Such Spitzer Space Telescope imaging purported possess velocity dispersions, $\sigma$, least $\sim$0.1 dex larger for given galaxy stellar mass, *,gal}$, than is typically observed among thousands of imaged by Sloan Digital Sky Survey. This apparent offset led Shankar et al. reduce normalisation bh} \propto \sigma^5$ relation...
We analyse the bulge/spheroid size-(stellar mass), $R_{\rm e,Sph}-M_{\rm *,Sph}$, relation and spheroid structural parameters for 202 local (predominantly $\lesssim 110~\rm Mpc$) galaxies spanning $ M_*\sim 3\times10^{9}-10^{12}~\rm M_{\odot}$ 0.1 \lesssim R_{\rm e, Sph}\lesssim32~\rm kpc$ from multicomponent decomposition. The correlations between S\'ersic index ($n_{\rm Sph}$), central surface brightness ($\mu_{\rm 0, effective half-light radius ($R_{\rm absolute magnitude...
The Ashtavakra Gita is a metaphysical treatise by Rishiraj Janaka and the able-disable Sage in Indian mythology. It spans 20 chapters 285 shlokas, focusing on post-human disabled-able agency. text influenced Hindu Studies knowledge systems, its interconnection of ideas, cohesion, consistency, logic are key research questions. study explores themes such as impact Western literature, tangible intangible identities, concept province region. also femininity, iconography, nationalism, time,...
While quiescent galaxies have comparable amounts of cool gas in their outer circumgalactic medium (CGM) compared to star-forming galaxies, they significantly less interstellar gas. However, open questions remain on the processes causing stop forming stars and stay quiescent. Theories suggest dynamical interactions with hot corona prevent from reaching galaxy, therefore predicting inner regions galaxy CGMs are devoid there is a lack understanding due spatial information quasar-sightline...
While quiescent galaxies have comparable amounts of cool gas in their outer circumgalactic medium (CGM) compared to star-forming galaxies, they significantly less interstellar gas. However, open questions remain on the processes causing stop forming stars and stay . Theories suggest dynamical interactions with hot corona prevent from reaching galaxy, therefore predicting inner regions galaxy CGMs are devoid there is a lack understanding due spatial information quasar-sightline methods. We...
My purpose in this work is to interpret and critically investigate folklore social epistemology, with specific reference some folk deities practices that I refer as 'alternative mythologies,' dare do so tenacity. In the Indian cultural context, classical Sanskritic Brahmanical religious acts have largely taken center stage panoptical system, at expense of subverting extremely significant relevant local vernacular doctrines. The blending mythology folklore, ostensibly "official" ones, can be...
For decades, astronomers have been investigating how the central supermassive black hole (BH) may govern host galaxy’s properties and vice versa. Our work adds another step to this study. We performed state-of-theart 2D modeling multi-component photometric decompositions of largest-to-date sample galaxies with dynamically-measured masses (MBH). The decomposition allows us accurately extract bulge (spheroid) stellar luminosity/mass structural parameters (also for other galaxy components)...
Abstract Our multi-component photometric decomposition of the largest galaxy sample to date with dynamically-measured black hole masses nearly doubles number such galaxies. We have discovered substantially modified scaling relations between mass and host properties, including spheroid (bulge) stellar mass, total central velocity dispersion. These refinements partly arose because we were able explore for various sub-populations galaxies built by different physical processes, as traced...