Research at IUCAA spans a wide range of fields. Current areas of active research include

  • Classical and quantum gravity
  • Cosmic magnetic fields
  • Cosmic Microwave Background studies
  • Cosmology and large scale structure
  • Galactic and extragalactic astronomy
  • Gravitational waves
  • High energy astrophysics
  • Instrumentation for astronomy
  • Interstellar medium
  • Observational Astronomy (Optical, UV, X-ray and Radio)
  • Quantum metrology for precision measurements
  • Solar Physics
  • Solar system and stellar physics
  • Virtual observatory

Click here for recent IUCAA preprints.

Summary of faculty research interests

Somak Raychaudhury   homepage publications

Joydeep Bagchi    publications
Prof. Bagchi works in radio astronomy, high-definition imaging of large-scale and faint radio sources, observational cosmology, detection of structure formation shocks in large-scale structures, detection of magnetic fields in superclusters and filaments, high-energy X-rays and gamma-ray studies of galaxy clusters, supermassivle black holes and studies radio and X-ray jets.
Dipankar Bhattacharya   homepage

Prof. Bhattacharya's research interests include the astrophysics of compact stars (white dwarfs, neutron stars and black holes), the structure and magnetic fields of neutron stars, cosmic explosions (novae, supernovae and gamma ray bursts), accretion-powered objects, X-ray astronomy and coded mask imaging.

Sukanta Bose   homepage

Prof. Sukanta Bose's research interests include the Searches for gravitational wave signals from compact object binaries and a stochastic gravitational wave background, and measuring their astrophysical or cosmological parameters, Characterization of the noise in gravitational wave detectors, Constraining the nuclear equation of state of neutron stars, Follow-up of gravitational-wave triggers for finding their electromagnetic counterparts and Speeding up gravitational wave data analysis computationally.

Debarati Chatterjee   homepage

Prof. Debarati Chatterjee is a theoretical astrophysicist with an expertise in analytical and numerical description of compact stars (neutron stars and white dwarfs). Her main interests are in developing global models which take into account both microscopic (involving interdisciplinary physics such as nuclear and particle physics, superconductivity) and macroscopic aspects (magnetic fields, relativity) consistently in order to improve astrophysical simulations and for better interpretation of multi-messenger astrophysical observations.

Naresh Dadhich    homepage    publications

Prof. Dadhich's research interests cover relativistic gravitation and its applications in astrophysics and cosmology, higher-dimensional Gauss-Bonnet gravity and its effects in four-dimensional spacetime, and basic conceptual issues in unification of forces and quantum gravity. Prof. Dadhich is also interested in the dialogue between science and society.

  Subhadeep De homepage   publications
Prof. De is an experimentalist in the areas of atomic-molecular-optical (AMO) physics with expertise in laser cooling and trapping of atoms & ions, degenerate quantum gasses, quantum optics and time & frequency metrology. His present research interests are (i) quantum metrology on ultra-stable optical reference that has applications in fundamental sciences and high-end technologies e.g. quantum communication; (ii) developing quantum-enhanced technologies; (iii) precision measurements for probing temporal constancy of dimensionless fundamental constants, geodesy, violation of Lorentz symmetry and (iv) studying quantum dynamics using trapped atoms/ ions.
  Gulab Chand Dewangan    publications
Prof. Dewangan's research interests are in X-ray astronomy, X-ray study of active galactic nuclei, ultra-luminous X-ray sources and X-ray binaries. His primary research interest is to probe the immediate environments of supermassive black holes through X-ray spectroscopic and temporal variability studies. His research work includes X-ray observations, data analysis/modeling and interpretation. He is also interested in multiwavelength observational astrophysics.
Sanjeev Dhurandhar    homepage    publications
Prof. Dhurandhar's reseach is on gravitational wave data analysis and computer modelling of gravitational wave detectors. He has worked on efficient search algorithms for ground-based detectors for inspiraling compact binaries. Recently, he used commutative algebraic methods for canceling laser frequency noise in LISA. Prof Dhurandhar has collaborations with major detector groups world-wide and has been a member of the LIGO Science Collaboration since 2000.
Ranjan Gupta    homepage    publications
Prof. Gupta's research interests cover three areas: 1) artificial neural networks (ANNs), 2) interstellar dust and 3) astronomical instrumentation. Prof. Gupta has used ANNs to classify stellar spectra and to extract fundamental stellar atmospheric parameters. He has also modelled interstellar and cometary dust by using porous non-spherical composite grains, and has developed astronomical instruments such as photometers, spectrometers and polarimeters in the optical and near-infrared regions.
Neeraj Gupta  homepage   publications
Neeraj Gupta's research focuses on interstellar medium of galaxies.  He is involved in various observational projects with current and upcoming radio telescopes to trace the evolution of cold atomic and molecular gas content of galaxies using absorption lines. He is co-PI of the MeerKAT Absorption Line Survey (MALS), and is interested in observational techniques relevant to large blind searches of absorption lines at radio wavelengths.
Ajit Kembhavi    publications
Prof. Kembhavi's interests are in normal and active galaxies, quasars, pulsars and so on. He is presently working on the morphology of galaxies using ground-based and space data at optical and near-infrared wavelengths, with special attention to lenticulars and luminous compact galaxies. Prof. Kembhavi also works on warm absorbers in active galaxies. He is the PI of the Virtual Observatory - India project, through which he and his collaborators develop applications for virtual observatories.
Ranjeev Misra    publications
Prof. Misra's research interests are in high energy astrophysics which includes accretion disk theory, study of spectral and timing properties of X-ray binaries, ultra-luminous X-ray sources, large-scale radio/X-ray jets of AGN and, lately, gamma-ray bursts. His research involves theoretical modeling as well as X-ray data analysis and interpretation. Prof. Misra is also interested in cross-disciplinary studies like non-linear dynamics of astrophysical systems, non-linear time series analysis and statistical classificiation schemes of astrophysical sources.
Sanjit Mitra    homepage
Dr. Mitra works on observation of gravitational waves (GW) and cosmic microwave background (CMB). He has developed algorithms for accurate and efficient analysis of data coming from current GW and CMB experiments. For many years he is part of the LIGO-Virgo Scientific Collaboration, the IndIGO consortium and the Planck Collaboration.
Surhud S More
Prof. More's research focusses on cosmology and the formation and evolution of galaxies, both observationally and theoretically. Astronomical observations in the last couple of decades indicate that a large portion (~96%) of the energy density of the Universe is made up of two mysterious and poorly understood components: dark matter and dark energy. His research work has helped understand the connection between the observable properties of galaxies and the dark matter clumps in which galaxies live. This has allowed the use of galaxies as shining beacons to explore the parameters that describe the dark Universe. He is a member of the Subaru Hyper Suprime-Cam survey as well as the upcoming Large Synoptic Survey Telescope project, two ambitious projects which aim to map out dark matter in the Universe and understand dark energy.
Dipanjan Mukherjee publications
Prof. Mukherjee's research interest are on the topics of high energy astrophysics and simulations of astrophysical fluids over a broad range of scenarios. A strong emphasis is placed on developing numerical modules to be used in large scale simulations and comparison with observational data. Some of the current topics of active research are: a) Galaxy evolution over cosmic time and the impact of AGN and stellar feedback on star formation. Impact of feedback processes on the properties of interstellar and circumgalactic media such as turbulence, metallicity and multi-phase gas distribution. b) Physics of relativistic jets from blackholes of all scales and their emission mechanisms. c) Physics of compact objects and the evolution of neutron star magnetic field. e) Accretion processes in compact objects and their observable signatures.
Jayant Narlikar   homepage    publications
Prof. Narlikar is continuing his work in alternative cosmology, the so-called quasi-steady state cosmology, and is currently working on tests that distinguish it from the standard big bang cosmology. One such test involves searching for very old stars. Another of his interests is to look for microorganisms in samples of air collected by balloons from heights of up to 41km, as such organisms are likely of extraterrestrial origin.
Thanu Padmanabhan    homepage    publications
Prof. Padmanabhan is interested in all areas of theoretical physics, especially those which have something to do with gravity. A more specific perspective is available on his personal homepage.
Aseem Paranjape publications
Dr. Paranjape is interested in a number of topics in cosmology and gravitation: large scale structure, galaxy clusters, dark energy, primordial non-Gaussianity, general relativity, semi-classical effects near black holes and statistical techniques for cosmology. His recent work has focused on understanding the evolution of large scale structure using analytical methods such as the excursion set approach, the halo model, etc. as well as large volume N-body simulations to study the spatial distribution and evolution of galaxies, the inter-galactic medium and voids.
A. N. Ramaprakash    homepage    publications
Prof. Ramaprakash's research interest is astronomical instrumentation. In the recent past, he has been largely involved in setting up the IUCAA Girawali Observatory, which has a 2m diameter optical, near-IR telescope and associated back-end instruments. He has also worked on CCD and near-IR detectors and data acquisition systems, cold optics and cryogenic design, testing and assembling, integral field units using optical fibres, OH-suppression spectroscopy, polarimetry etc. His observational interests relate to polarimetric studies of a range of astronomical sources such as pre-main sequence stars, brown dwarfs, galactic molecular clouds, and observations of transient phenomenae like GRBs and SNe.
Kanak Saha    homepage
I am primarily interested in the dynamics and evolution of galaxies. I use N-body simulation as well as semi-analytic techniques to address a variety of issues in this subject. Current topics of research includes the formation and evolution of bars and bulges in disk galaxies; spiral structures; the role of dark matter haloes and super-massive black holes. I am also interested in the dynamical modeling of galaxies (both external and the Milky Way) using stellar kinematics as well as gas kinematics data and inferring about the distribution of dark matter. My other interests includes development of galaxy models; study galaxy interaction and mergers, long term evolution.
Varun Sahni    publications
Prof. Sahni works mainly in cosmology. His work on inflation includes a formulation of the cosmic no-hair theorem. He is also interested in the relic gravity wave background from inflation and its effects on the CMB. He also works on higher-dimensional braneworld cosmology, assessing its effects both on the early universe and at later times, as a candidate for dark energy. Prof. Sahni has developed a model-independent methodology for reconstructing properties of dark energy from observations. He is deeply interested in gravitational clustering and in the morphology of the supercluster-void network, having developed with collaborators a powerful diagnostic called the Shapefinder to determine the topological and geometric properties of the cosmic web.
Nishant Singh homepage    publications
I work in the areas of magnetohydrodynamics and astrophysical fluid dynamics. My current research includes, 1) dynamo theory to understand the origin of cosmic magnetic fields, 2) some aspects of solar physics, especially the sunspot formation and helioseismology, and 3) turbulent convection. I am also interested in the warm dark matter paradigm of galaxy formation.
Tarun Souradeep    homepage    publications
Prof. Souradeep is a cosmologist working primarily on CMB anisotropy and polarization. His work has dwelt on the cosmological ramifications of physics in the early universe. He has worked on diverse topics from quantum cosmology, generation of primordial perturbations and CMB anisotropy to observational issues and parameter estimation. Prof. Souradeep is currently developing novel analysis techniques for WMAP and the upcoming Planck Surveyor mission with the goal of hunting for signatures of new physics such as violation of statistical isotropy, cosmic topology and the relic cosmological gravity wave background.
Raghunathan Srianand    homepage    publications
Prof. Srianand is involved in various observational and theoretical projects: 1) probing the physical conditions in the high-z proto-galaxies traced by DLAs, 2) probing the time and space variation of fundamental constants using very high resolution spectra of QSOs, 3) tracing the redshift evolution of the CMB temperature using fine-structure lines and 4) semi-analytic modelling of formation and evolution of IGM, reionization and redshift evolution of global star formation rate density in the universe.
Kandaswamy Subramanian    publications
Prof. Subramanian's current research work focuses on 1) the origin of cosmic magnetic fields especially dynamo theory, 2) structure formation in the universe  and 3) the cosmic microwave background. He has also worked in the past on gravitational lensing.
Shyam Tandon    publications
Prof. Tandon is interested in the polarisation of light in interstellar clouds, in UV astronomy, in instrumentation for optical telescopes, in instrumentation for space astronomy and in photon-counting detectors for UV astronomy.
  Durgesh Tripathi   homepage    publications
Prof Tripathi's research interest includes, Physics of the upper solar atmosphere i.e. heating and dynamics of solar transition regions and corona, small and large-scale solar eruptions and associated phenomena i.e., coronal mass ejections, flares, post-eruption arcades, EUV and Moreton waves, prominence seismology, solar terrestrial relations, spectroscopy and solar magneto-hydrodynamics.

Summary of Adjunct Faculty research interests

Dr. Ashish Mahabal   homepage    publications
California Institute of Technology, 1200 E, California Bivd, MC 249-17, Pasadena - 91125, California, USA

Dr Mahabal works on large sky surveys, variability, and machine learning.
Dr. David Hilditch   homepage    publications
CENTRA, Tecnico, Avenida Rovisco Pais 1, 1049, Lisbon, Portugal

Dr. Hilditch works on Numerical Relativity