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)
  • Solar Physics
  • Solar system and stellar physics
  • Virtual observatory

Click here for recent IUCAA preprints.

Summary of faculty research interests

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.
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.

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.

  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.
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.
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.
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.


Academic Members



Name of  the Academic Member,  Position, E-mail address (id given in brackets should be followed by, and the Area of Research


Professor Ajit K. Kembhavi, Director (akk)

Quasars, Elliptical Galaxies, Virtual Observatory, and Simulations.


Professor  Joydeep  Bagchi,  Associate  Professor (Scientist  F) (joydeep)

Radio Astronomy, X-ray Studies of Galaxy Clusters, and High Energy Radiative Processes.


Professor Dipankar Bhattacharya, Professor  (Scientist H) (dipankar)

High Energy Astrophysics, Neutron Stars, Gamma Ray Bursts, and X-ray Astronomy.


Professor Sukanta Bose, Professor (Scientist G) (sukanta)


Professor Naresh K. Dadhich, Emeritus Professor (nkd)

Classical General Relativity, and Relativistic Astrophysics.


Professor Gulab Chand Dewangan,  Associate Professor (Scientist F) (gulabd)

X-ray Astronomy, AGNs, ULXs, X-ray Binaries, Multi-wavelength Astronomy.


Professor Sanjeev Dhurandhar, Emeritus Professor (sanjeev)

Gravitational wave astronomy, gravitational wave data analysis and general relativity.


Professor Neeraj Gupta, Professor (Scientist E) (ngupta)

Interstellar medium, Quasar absorption lines, Radio and optical spectroscopy, Wideband radio aperture synthesis, Very long baseline interferometry, and techniques relevant to large spectroscopic surveys.


Professor  Ranjan  Gupta,  Professor (Scientist G) (rag)

Astronomical Instrumentation, Stellar Spectroscopy, and Artificial Neural Networks.


Professor  Ranjeev  Misra,  Associate  Professor (Scientist F) (rmisra)

Blackhole and Neutron Star Binaries, AGN and Quasars, High Energy Radiative Processes, and X-ray Data  Analysis.


Professor Sanjit Mitra, Assistant Professor (Scientist E) (sanjit)

Gravitational Waves, Cosmology and Cosmic Microwave Background.


Professor  Jayant  V.  Narlikar,  Emeritus  Professor  (jvn)

Physical Cosmology, Quantum Cosmology, Extragalactic Astrophysics, and Gravitation.


Professor T.  Padmanabhan, Dean, Core Academic Programmes, Distinguished Professor (Scientist I) (paddy)

Quantum Gravity, QFT in Curved Spacetime, Cosmology, Structure Formation in the Universe, and Statistical Mechanics of Gravitating Systems.


Professor Aseem Paranjape, Assistant Professor (Scientist E) (aseem)

Cosmology, large scale structure (dark matter, galaxies and inter-galactic medium), galaxy clusters, dark energy, primordial non-Gaussianity, general relativity, semi-classical effects near black holes, statistical techniques for cosmology


Professor  A.N.  Ramaprakash,  Professor (Scientist G) (anr)

Astronomical Instrumentation, and Observations.


Professor Kanak Saha, Professor (Scientist E) (kanak)

Galactic dynamics, galaxy evolution, bulges in spiral galaxies, stellar bars and double bars, structure and spin of dark matter haloes around disk galaxies, Milky Way, disk instabilities, spiral structures, N-body simulation.


Professor  Varun  Sahni,  Professor  (Scientist H) (varun)

Cosmology, Early Universe, Inflation, QFT in Curved Spacetime, Formation of Large Scale Structure, and CMB.


Professor  Tarun  Souradeep,   Professor  (Scientist G) (tarun)

Cosmology, Structure Formation in the Universe, CMB, Early Universe, and Applications of  QFT in Curved  Spacetimes.


Professor  R.  Srianand,  Professor (Scientist G) (anand)

QSO, Absorption Lines, Intergalactic Medium, and Cosmology.


Professor  Kandaswamy  Subramanian,   Professor  (Scientist H) (kandu)

Gravitational Lensing, Origin of Cosmic Magnetic Field, Cosmology, Structure Formation, and Early Universe.    


Professor  Shyam  N.  Tandon,  Emeritus  Professor (sntandon)

Cosmic Ray Physics, Infrared and Far Infrared Astronomy, Astronomical Observations using Balloon Borne Flat  Forms, Astronomical Instrumentation,  and  Weak  Forces in  Nature.


Professor Durgesh Tripathi, Associate Professor (Scientist F) (durgesh)

Physics of Solar Atmosphere, Solar Eruptions and Associated Phenomena, Solar Terrestrial Relations, Spectroscopy, Solar Magneto-hydrodynamics.


Post-doctoral Fellows



Dr. Pavan Kumar Aluri, Post-doctoral Fellow (aluri)

Cosmic Microwave Background Radiation (CMBR) - data analysis/statistical isotropy,   Modified theories of gravity and,  Anisotropic cosmological models and their implications (to CMB anisotropies).


Dr. Varun Bhalerao, Vaidya-Raychaudhuri Post-doctoral Fellow (varunb)

Compact objects (Neutron stars, white dwarfs) in X-rays, Optical and
IR; Instrumentation


Dr. Anuradha Gupta, Post-doctoral Fellow (anuradha)

Compact binary dynamics and gravitational wave astrophysics.


Dr. Girjesh R. Gupta, DST INSPIRE Faculty Fellowship (girjesh)

Study of MHD turbulence in the solar and astrophysical plasmas, solar spectroscopy and time series analysis.


Mr. Ravi Joshi, Post-doctoral Fellow (rjoshi)

Quasar Emission and Absorption line, Quasar Outflows, Continuum Variability in AGNs.


Dr. Vishal H. Joshi, Post-doctoral Fellow (vishal)

Novae-Classical and Recurrent, Supernovae, optical transients, Techniques: Optical / near-infrared - Photometry and Spectroscopy, Image processing


Mr. Kinjalk Lochan, Post-doctoral Fellow (kinjalk)

Quantum Gravity, Black hole thermodynamics, Early universe etc.


Dr. Arunava Mukherjee, Post-doctoral Fellow (arunava)

Timing and Spectral properties in Low-mass X-ray Binaries, Physics of Accretion Processes, High Energy Astrophysics


Dr. Mayukh Pahari, Post-doctoral Fellow (mayukh)

Spectral and timing properties of accretion onto compact objects like stellar mass black hole X-ray binaries and neutron star X-ray binaries, variabilities correlated with broadband spectroscopy (soft X-ray to Gamma ray), instrumentations - CZT, CdTe detectors, LAXPC/ASTROSAT.


Ms. Isha Pahwa, Post-doctoral Fellow (ipahwa)

Cosmology, Large scale structure, galaxy formation, disc galaxies, numerical simulations, reionization.


Dr. Barun Kumar Pal, Post-doctoral Fellow (barunpal)

Cosmological inflation, inflationary perturbations, cosmic microwave background radiation (CMB) and weak gravitational lensing of CMB.


Dr. Nidhi Pant, Post-doctoral Fellow (nidhip)

Cosmology, Cosmic Microwave Background, Statistical Isotropy Violation, Statistical techniques for data analysis in Cosmology, Estimating the systematic effects in CMB experiments, Gravitational Waves


Dr. Mandar Patil, Post-doctoral Fellow (mandar)

General Relativity, Gravitational Waves, Cosmology.


Dr. Jayanti Prasad, Project Post-doctoral Fellow (jayanti)


Dr. Nilkanth D. Vagshette, Project Scientist – ASTROSAT (nilkanth)

Research Scholar



Mr. Anirban Ain, Research Scholar  (ainz)

Sources and Detection of Gravitational Waves.


Mr. Satadru Bag, Research Scholar (satadru)

Effective potential formalism, Inflationary Cosmology, Braneworld Cosmology.


Mr. Suman Bala, Research Scholar (First Year) (bala)


Ms. Pallavi Bhat, Research Scholar (palvi)

Cosmic Magnetic Fields and Turbulent Dynamos.


Mr. Prasanta Bera, Research Scholar (pbera)

Compact Stars, Magnetic Fields, Numerical Simulations.


Mr. Sumanta Chakraborty, Research Scholar (sumanta)

Thermodynamical Aspects of Gravity, Quantum Fields in Curved Spacetime, Higher Curvature Gravity, Extra dimensions, Brane World and Particle phenomenology.


Mr. Kabir Chakravarti, Research Scholar (kabir)


Mr.  Sabyasachi Chattopadhyay, Research Scholar  (sabyasachi)

Optical Instrumentation : Photometry, Fibre fed Spectrography, Electronic Control System, Critical Observation.


Mr. Santanu Das, Research Scholar (santanud)

Cosmology and Gravitation.


Mr. Kaustubh Deshpande, Research Scholar (First Year) (deshpande)


Ms. Rajeshwari Dutta, Research Scholar (rdutta)

Multi-wavelength study of cold gas in external galaxies, physical and chemical conditions in damped Lyman alpha (DLA) systems, connection between galaxy and absorption properties.


Mr. Bhooshan Gadre, Research Scholar (bug)

Gravity and Gravitational Waves.


Mr. Shaikh Shabbir Isak, Research Scholar (shabbir)

Cosmology, Cosmic Microwave Background Radiation.


Mr. Charles Jose, Research Scholar  (charles)

Cosmology, Structure formation in the Universe.


Mr. Vikram Khaire, Research Scholar (vikramk)

Intergalactic medium, Cosmic ultraviolet background radiation.


Mr. Nagendra Kumar, Research Scholar (nagendrak)


Ms. Labani Mallick, Research Scholar (labani)

Active Galactic Nuclei


Mr. Suvodip Mukherjee, Research Scholar (suvodip)

Cosmology, CMB physics, Early Universe.


Mr. Nikhil Mukund K., Research Scholar (nikhil)

Gravitational Waves, Active Noise Cancellation, GW Detector Simulations.


Ms. Hamsa Padmanabhan, Research Scholar (hamsa)

Cosmology, Structure Formation in the Universe, Intergalactic medium.


Mr. Main Pal, Research Scholar  (mainpal)

Spectral variability of Active galactic nuclei.


Mr. Krishna Mohan Parattu, Research Scholar  (krishna)



Mr. Niladri Paul, Research Scholar (First Year) (npaul)


Mr. Sk. Javed Rana, Research Scholar (javed)

Gravitational Waves.


Mr. Debajyoti Sarkar, Research Scholar (First Year) (debajyoti)


Ms. Ruchika Seth, Research Scholar (First Year) (ruchika)


Mr. Suprit Singh, Research Scholar (suprit)

Quantum Gravity/Quantum field theory in curved spacetime.


Mr. Kaustubh Vaghmare, Research Scholar (kaustubh)

Galaxies –  Surface Photometry and Spectroscopy, Structure and Evolution of  Lenticular Galaxies.