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nilanjana profile

Nilanjana Nandi

Academic background:

I have completed my Bachelor’s degree in Physics (with Hons.) from Raja Peary Mohan College, University of Calcutta and thereafter completed my Masters in Physics from Rashbehari Siksha Prangan (UCSTA), University of Calcutta. In between, I have worked on experimental particle physics at Bose Institute, Kolkata. I have joined Ph.D. at IISER Tirupati in August 2021 and am currently working under Dr. Arunima Banerjee on numerical and analytical studies of galactic dynamics.

Research interest(objectives):

Ultra-diffuse galaxies are remarkable for their very low stellar surface brightness and very extended size given their low dynamical masses. They reside in almost all possible environments in the universe such as cluster, group, field, filament, even void, making them an important population of the universe. They are found with a range of properties in terms of their atomic hydrogen gas content, richness of dark matter, morphology, star formation rate etc. Besides, these galaxies can be characterized as an evolutionary link to other dwarf galaxies, as suggested by the spectroscopic observations. There are several hypotheses proposed to explain their formation and evolution yet the primary formation mechanism is still elusive; in fact, their diversity suggests that the environmental effects can be crucial for their origination. Given their extraordinarily faint appearance, these galaxies remained unexplored until recently and are extremely challenging to detect. The main objective of this thesis project is to perform numerical, analytical and statistical studies of the ultra-diffuse galaxies to understand their formation and evolution, also, several other aspects which are possibly responsible for their extraordinary attributes.

Advisor information:

Dr. Arunima Banerjee is an astrophysicist and associate professor at the Department of Physics, IISER Tirupati. Her broad research area is theoretical astrophysics focusing on modelling and simulation as applied to dynamics of galaxies, application of Bayesian statistics, machine learning, data science in galaxy astrophysics, alternative theories of gravity etc. Further information can be found on her webpage.

Courses taken:

  • 4 courses (of 16 credits) and 2 audit courses were taken in the first two semesters of the Ph.D. program.

Teaching Assistantships: 

  • Electricity & Magnetism (PHY211, BSMS 2021 batch, 3rd semester)
  • Quantum Mechanics (PHY221, BSMS 2021 batch, 4th semester)

External Teaching assistantships:

  • Quantum Mechanics at Sree Venkateshwara College of Engineering, Tirupati, India

Publications (peer-reviewed):

  1. Roy, S., Nandi, N., Adak, R. P., Biswas, S., Das, S., Ghosh, S. K., Prasad, S. K., Raha, S., Study of performances of a Straw tube detector with high rate, Nuclear Instruments and Methods in Physics Research A: Accelerators, Spectrometers, Detectors and Associated Equipment, Elsevier, 2019, 936, 488–490, 10.1016/j.nima.2018.08.05
  2. Roy, S., Nandi, N., Adak, R. P., Biswas, S., Das, S., Ghosh, S. K., Prasad, S. K., Raha, S., Studies of the effect of rate on gain for straw tube detector, arXiv preprint, 2017, arXiv:1709.08030, 10.48550/arXiv.1709.08030
  3. Roy, S., Nandi, N., Adak, R. P., Biswas, S., Das, S., Ghosh, S. K., Prasad, S. K., Raha, S., Study of the rate handling capacity of a straw tube detector, CBM progress report, 2017, ISBN 978-3-9815227-5-4, 12th issue, 74, 10.15120/GSI-2018-00485
  4. Nandi, N., Roy, S., Adak, R. P., Biswas, S., Das, S., Ghosh, S. K., Prasad, S. K., Raha, S., Characterization of the Straw tube detector, Proceedings of the DAE-BRNS symposium on nuclear physics, 2017, V. 62, 1032–1033/li>