BIMSA > Dey Dipanjan
Postdoc Dey Dipanjan

Group: General Relativity and Partial Differential Equations

Office: A3-4-210

Email: dipanjandey@bimsa.cn

Research Field: Mathematical Physics, General Relativity

CV

Biography

Dipanjan Dey is a postdoctoral fellow at BIMSA, working under the guidance of Professor Shing-Tung Yau and Professor Lars Andersson. His research focuses on gravitational collapse, the causal structure of spacetime singularities, and the spinor structure of spacetime manifolds.

Research Interest

  • Gravitational collapse and causal structure of spacetime singularities
  • Spinor structure of spacetime manifold

Education Experience

  • 2013 - 2019      Indian Institute of Technology, Kanpur, India      Physics      Ph.D
  • 2011 - 2013      Indian Institute of Technology, Kanpur, India      Physics      M.Sc.

Work Experience

  • 2024 -      BIMSA, China      Postdoctoral Fellow
  • 2022 - 2024      Dalhousie University, Canada      AARMS Postdoctoral Fellow
  • 2020 - 2022      International Center for Cosmology, CHARUSAT, India      Assistant Professor
  • 2018 - 2020      International Center for Cosmology, CHARUSAT, India      Postdoctoral Fellow

Honors and Awards

  • 2022      AARMS Fellowship

Publication

  • [1] Koushiki , Dipanjan Dey, Pankaj S. Joshi, A bonafide model of structure formation from gravitational collapse, Eur.Phys.J.C 85 (2025), 493, 84, 493 (2025)
  • [2] D Debnath, D Dey, K Bhattacharya, End equilibrium state of a spherical gravitational collapse in the presence of matter and a scalar field, Physical Review D, 111(2), 2 (2025)
  • [3] P Saha, D Dey, K Bhattacharya, Non-minimal coupling of scalar fields in the dark sector and generalization of the top-hat collapse, Eur.Phys.J.C 85 (2025) 4, 384, 84(4), 384 (2024)
  • [4] Ashok B. Joshi, Dipanjan Dey, Pankaj S. Joshi, Vivekkumar R. Tank, Tidal forces in collapsing compact objects, Phys.Rev.D 110 (2024) 12, 124066 (2024)
  • [5] Priyanka Saha, Dipanjan Dey, Kaushik Bhattacharya, Gravitational collapse of matter in the presence of nonminimally coupled quintessence and phantomlike scalar fields, Physical Review D, 109(10), 104023 (2024)
  • [6] Dipanjan Dey, Karim Mosani, Spherical and Aspherical Gravitational Collapse: Locally and Globally Naked Singularities, , 277 - 304 (2024)
  • [7] Kaushik Bhattacharya, Dipanjan Dey, Priyanka Saha, The initial value problem in cosmology: An alternative derivation for beginners, arXiv preprint arXiv:2404.13332 (2024)
  • [8] Dhruv Arora, Parth Bambhaniya, Dipanjan Dey, Pankaj S. Josh, Tidal forces in the Simpson–Visser black-bounce and wormhole spacetimes, Phys.Dark Univ., 44, 101487 (2024)
  • [9] D Arora, P Bambhaniya, D Dey, PS Joshi, Tidal forces in the Simpson-Visser black-bounce and wormhole spacetimes, Physics of the Dark Universe, 101487 (2024)
  • [10] Dipanjan Dey, Alan A. Coley, Nicholas T. Layden , Definition of a photon surface in an invariant spin frame, Physical Review D, 109(6), 064021 (2024)
  • [11] Parth Bambhaniya, Ashok B. Joshi, Dipanjan Dey, Pankaj S. Joshi, Arindam Mazumdar, Tomohiro Harada, Kenichi Nakao, Relativistic orbits of S2 star in the presence of scalar field, The European Physical Journal C, 84(2), 124 (2024)
  • [12] Nicholas T. Layden , Alan A. Coley, Dipanjan Dey, Invariant description of static and dynamical Brans–Dicke spherically symmetric models, General Relativity and Gravitation, 56(1), 10 (2024)
  • [13] Ashok B. Joshi, Divya Tahelyani, Dipanjan Dey, Pankaj S. Joshi, Observational aspects of a class of dark matter spacetimes, Physical Review D, 108(10), 104034 (2023)
  • [14] Dipanjan Dey, Koushiki , Pankaj S. Joshi, Equilibrium states from gravitational collapse of a minimally coupled scalar field with a nonzero potential, Physical Review D, 108(10), 104045 (2023)
  • [15] Priyanka Saha, Dipanjan Dey, Kaushik Bhattacharya, Gravitational collapse of matter in the presence of quintessence and phantomlike scalar fields, Physical Review D, 108(8), 084025 (2023)
  • [16] Dipanjan Dey, Nicholas T. Layden , Alan A. Coley, Equilibrium condition in gravitational collapse and its application to a cosmological scenario, Physical Review D, 108(4), 044046 (2023)
  • [17] D Dey, Koushiki, PS Joshi, Equilibrium states from gravitational collapse of minimally coupled scalar field with non-zero potential, arXiv preprint arXiv:2308.03603 (2023)
  • [18] Sunny Vagnozzi, Rittick Roy, Yu-Dai Tsai, Luca Visinelli, Misba Afrin, Alireza Allahyari, Parth Bambhaniya, Dipanjan Dey, Sushant G. Ghosh, Pankaj S. Joshi, Kimet Jusufi, Mohsen Khodadi, Rahul Kumar Walia, Ali Övgün, Cosimo Bambi, Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A$^*$, Classical and Quantum Gravity, 40(16), 165007 (2023)
  • [19] Karim Mosani, Dipanjan Dey, Pankaj S. Joshi, Gauranga C. Samanta, Harikrishnan Menon, On the visibility of singularities in general relativity and modified gravity theories, Classical and Quantum Gravity, 40(14), 145015 (2023)
  • [20] Parth Bambhaniya, Jay Verma Trivedi, Dipanjan Dey, Pankaj S. Joshi, Ashok B. Joshi, Lense–Thirring effect and precession of timelike geodesics in slowly rotating black hole and naked singularity spacetimes, Physics of the Dark Universe, 40, 101215 (2023)
  • [21] Vishva Patel, Divya Tahelyani, Ashok B. Joshi, Dipanjan Dey, Pankaj S. Joshi , Light trajectory and shadow shape in the rotating naked singularity, Eur.Phys.J.C, 82(9), 798 (2022)
  • [22] Dipanjan Dey,Pankaj S. Joshi, Karim Mosani, Vitalii Vertogradov, Causal structure of singularity in non-spherical gravitational collapse, The European Physical Journal C, 82(5), 431 (2022)
  • [23] Divya Tahelyani, Ashok B. Joshi, Dipanjan Dey, Pankaj S. Joshi, Comparing thin accretion disk properties of naked singularities and black holes, arXiv preprint arXiv:2205.04055, 106, 044036 (2022)
  • [24] Karim Mosani, Dipanjan Dey, Kaushik Bhattacharya, Pankaj S. Joshi, Singularity resolution in gravitational collapse, Physical Review D, 105(6), 064048 (2022)
  • [25] Divyesh N. Solanki, Parth Bambhania, Dipanjan Dey, Pankaj S. Joshi, Kamlesh N. Pathak, Shadows and precession of orbits in rotating Janis–Newman–Winicour spacetime, The European Physical Journal C, 82(1), 77 (2022)
  • [26] Chinmay N. Gandevikar, Divyesh N. Solanki, Dipanjan Dey, Post-Newtonian properties of EMRI with power law potential, The European Physical Journal C, 81, 1-13 (2021)
  • [27] Karim Mosani, Dipanjan Dey, Pankaj S. Joshi, Globally visible singularity in an astrophysical setup, Monthly Notices of the Royal Astronomical Society, 504(4), 4743-4750 (2021)
  • [28] Kanwar Preet Kaur, Pankaj S. Joshi, Dipanjan Dey, Ashok B. Joshi, Rucha P. Desai, Comparing shadows of blackhole and naked singularity, arXiv preprint arXiv:2106.13175 (2021)
  • [29] Parth Bambhania, Dipanjan Dey, Ashok B. Joshi, Pankaj S. Joshi, Divyesh N. Solanki, Shadows and negative precession in non-Kerr spacetime, Physical Review D, 103(8), 084005 (2021)
  • [30] Parth Bambhania, Divyesh N. Solanki, Dipanjan Dey, Ashok B. Joshi, Pankaj S. Joshi, Precession of timelike bound orbits in Kerr spacetime, The European Physical Journal C, 81(3), 205 (2021)
  • [31] Dipanjan Dey, Rajibul Shaikh, Pankaj S. Joshi, Shadow of nulllike and timelike naked singularities without photon spheres, Physical Review D, 103(2), 024015 (2021)
  • [32] Karim Mosani, Dipanjan Dey, Pankaj S. Joshi, Global visibility of a strong curvature singularity in nonmarginally bound dust collapse, Physical Review D, 102(4), 044037 (2020)
  • [33] Dipanjan Dey, Rajibul Shaikh, Pankaj S. Joshi, Perihelion precession and shadows near black holes and naked singularities, Physical Review D, 102(4), 044042 (2020)
  • [34] Ashok B. Joshi, Dipanjan Dey, Pankaj S. Joshi, Parth Bambhania, Shadow of a Naked Singularity without Photon Sphere, Physical Review D, 102(2), 024022 (2020)
  • [35] K Mosani, D Dey, PS Joshi, Global visibility of a strong curvature singularity in non-marginally bound dust collapse, Physical Review D, 102(4), 044037 (2020)
  • [36] D Dey, R Shaikh, PS Joshi, Perihelion precession and shadows near blackholes and naked singularities, Physical Review D, 102(4), 044042 (2020)
  • [37] Karim Mosani, Dipanjan Dey, Pankaj S. Joshi, Strong curvature naked singularities in spherically symmetric perfect fluid collapse, Physical Review D, 101(4), 044052 (2020)
  • [38] Kaushik Bhattacharya, Dipanjan Dey, Arindam Majumdar, Tapobrata Sarkar, New class of naked singularities and their observational signatures, Physical Review D, 101(4), 043005 (2020)
  • [39] Parth Bambhaniya, Ashok B. Joshi, Dipanjan Dey, Pankaj S. Joshi, Timelike geodesics in naked singularity and black hole spacetimes, Physical Review D, 100(12), 124020 (2019)
  • [40] Dipanjan Dey, Pankaj S. Joshi, Gravitational collapse of baryonic and dark matter, Arabian Journal of Mathematics, 8(4), 269-292 (2019)
  • [41] Karim Mosani, Dipanjan Dey, Pankaj S. Joshi, On viability of isentropic perfect fluid collapse with a linear equation of state, arXiv preprint arXiv:1910.13678 (2019)
  • [42] Dipanjan Dey, Pankaj S. Joshi, Ashok B. Joshi, Parth Bambhaniya,, Towards an observational test of black hole versus naked singularity at the galactic center, , 28(14), 1930024 (2019)
  • [43] Ashok B. Joshi, Parth Bambhania, Dipanjan Dey, Pankaj S. Joshi, Timelike geodesics in naked singularity and black hole spacetimes II, arXiv preprint arXiv:1909.08873 (2019)
  • [44] Dipanjan Dey, Prashant Kocherlakota, Pankaj S. Joshi, A General Relativistic Approach to Small-Scale Structure Formation, arXiv preprint arXiv:1907.12792 (2019)
  • [45] Uddipan Banik, Dipanjan Dey, Kaushik Bhattacharya, Tapobrata Sarkar, Self-gravitating fluid systems and galactic dark matter, General Relativity and Gravitation, 49, 1-21 (2017)
  • [46] K Bhattacharya, D Dey, A Mazumdar, T Sarkar, On the end stage of spherical gravitational collapse in a cosmological scenario, arXiv preprint arXiv:1709.03798 (2017)
  • [47] D Dey, Space-time of Dark-matter, advances in astroparticle physics and cosmology (2015)
  • [48] Dipanjan Dey, Kaushik Bhattacharya, Tapobrata Sarkar, Galactic space-times in modified theories of gravity, General Relativity and Gravitation, 47, 1-27 (2015)
  • [49] Dipanjan Dey, Kaushik Bhattacharya, Tapobrata Sarkar, Astrophysics of Bertrand space-times, Physical Review D—Particles, Fields, Gravitation, and Cosmology, 88(8), 083532 (2013)
  • [50] Dipanjan Dey, Kaushik Bhattacharya, Tapobrata Sarkar, Galactic dark matter and Bertrand space-times, Physical Review D—Particles, Fields, Gravitation, and Cosmology, 87(10), 103505 (2013)

 

Update Time: 2025-08-12 12:00:07