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

Dr. Dipanjan Dey completed his Ph.D. in Physics at the Indian Institute of Technology, Kanpur, India, in 2019, under the supervision of Professor Kaushik Bhattacharya. His doctoral research primarily focused on investigating the gravitational collapse of compact objects across various cosmological scenarios. Following his Ph.D., Dr. Dey joined the International Center for Cosmology at CHARUSAT, India, as a postdoctoral fellow under the guidance of Professor Pankaj S. Joshi. During this postdoctoral tenure, his research centered on the causal structure of singularities formed during the continual gravitational collapse of compact objects, with a particular emphasis on identifying possible physical signatures of non-spacelike singularities. In March 2020, Dr. Dey was appointed as an assistant professor at the International Center for Cosmology, CHARUSAT, India. Throughout his time there, he made significant contributions to academia through research, teaching, and administrative responsibilities. In October 2022, he joined Dalhousie University as an AARMS postdoctoral fellow under the supervision of Professor Alan A. Coley. At Dalhousie, Dr. Dey's work involved studying the causal structure of singularities in a coordinate-independent manner, utilizing the spinor structure of the spacetime manifold in the context of collapsing compact objects.

Research Interest

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

Education Experience

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

Work Experience

  • 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] Debanjan Debnath, Dipanjan Dey, Kaushik Bhattacharya, End equilibrium state of a spherical gravitational collapse in the presence of matter and scalar field, Physical Review D, 111(2), 024073 (2025)
  • [2] Priyanka Saha, Dipanjan Dey, Kaushik Bhattacharya, Non-minimal coupling of scalar fields in the dark sector and generalization of the top-hat collapse (2024)
  • [3] 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)
  • [4] Priyanka Saha, Dipanjan Dey, Kaushik Bhattacharya, Gravitational collapse of matter in the presence of nonminimally coupled quintessence and phantomlike scalar fields, 109(10), 104023 (2024)
  • [5] Dipanjan Dey, Karim Mosani, Spherical and Aspherical Gravitational Collapse: Locally and Globally Naked Singularities, Springer, 277-304 (2024)
  • [6] Kaushik Bhattacharya, Dipanjan Dey, Priyanka Saha, The initial value problem in cosmology: An alternative derivation for beginners (2024)
  • [7] Koushiki , Dipanjan Dey, Pankaj S. Joshi, A bonafide model of structure formation from gravitational collapse (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] 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)
  • [10] 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, Eur.Phys.J.C, 84(2), 124 (2024)
  • [11] 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)
  • [12] 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)
  • [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] 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)
  • [15] 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, Class.Quant.Grav., 40(16), 165007 (2023)
  • [16] Karim Mosani, Dipanjan Dey, Pankaj S. Joshi, Gauranga C. Samanta, Harikrishnan Menon, On the visibility of singularities in general relativity and modified gravity theories, Class.Quant.Grav., 40(14), 145015 (2023)
  • [17] 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)
  • [18] 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, Phys.Dark Univ., 40, 101215 (2023)
  • [19] 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)
  • [20] Divya Tahelyani, Ashok B. Joshi, Dipanjan Dey, Pankaj S. Joshi, Comparing thin accretion disk properties of naked singularities and black holes, Physical Review D, 106(4), 044036 (2022)
  • [21] Dipanjan Dey,Pankaj S. Joshi, Karim Mosani, Vitalii Vertogradov, Causal structure of singularity in non-spherical gravitational collapse, Eur.Phys.J.C, 82(5), 431 (2022)
  • [22] Karim Mosani, Dipanjan Dey, Kaushik Bhattacharya, Pankaj S. Joshi, Singularity resolution in gravitational collapse, Physical Review D, 105(6), 064048 (2022)
  • [23] Divyesh N. Solanki, Parth Bambhania, Dipanjan Dey, Pankaj S. Joshi, Kamlesh N. Pathak, Shadows and precession of orbits in rotating Janis–Newman–Winicour spacetime, Eur.Phys.J.C, 82(1), 77 (2022)
  • [24] Chinmay N. Gandevikar, Divyesh N. Solanki, Dipanjan Dey, Post-Newtonian properties of EMRI with power law potential, Eur.Phys.J.C, 81(8), 693 (2021)
  • [25] Kanwar Preet Kaur, Pankaj S. Joshi, Dipanjan Dey, Ashok B. Joshi, Rucha P. Desai, Comparing Shadows of Blackhole and Naked Singularity (2021)
  • [26] Karim Mosani, Dipanjan Dey, Pankaj S. Joshi, Globally visible singularity in an astrophysical setup, Mon.Not.Roy.Astron.Soc., 504(4), 4743-4750 (2021)
  • [27] 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)
  • [28] Parth Bambhania, Divyesh N. Solanki, Dipanjan Dey, Ashok B. Joshi, Pankaj S. Joshi, Precession of timelike bound orbits in Kerr spacetime, Eur.Phys.J.C, 81(3), 205 (2021)
  • [29] Dipanjan Dey, Rajibul Shaikh, Pankaj S. Joshi, Shadow of nulllike and timelike naked singularities without photon spheres, Physical Review D, 103(2), 024015 (2021)
  • [30] 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)
  • [31] Dipanjan Dey, Rajibul Shaikh, Pankaj S. Joshi, Perihelion precession and shadows near black holes and naked singularities, Physical Review D, 102(4), 044042 (2020)
  • [32] 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)
  • [33] Karim Mosani, Dipanjan Dey, Pankaj S. Joshi, Strong curvature naked singularities in spherically symmetric perfect fluid collapse, Physical Review D, 101(4), 044052 (2020)
  • [34] Kaushik Bhattacharya, Dipanjan Dey, Arindam Majumdar, Tapobrata Sarkar, New class of naked singularities and their observational signatures, Physical Review D, 101(4), 043005 (2020)
  • [35] 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)
  • [36] Dipanjan Dey, Pankaj S. Joshi, Ashok B. Joshi, Parth Bambhaniya,, Towards an observational test of black hole versus naked singularity at the galactic center, Int.J.Mod.Phys.D, 28(14), 1930024 (2019)
  • [37] Karim Mosani, Dipanjan Dey, Pankaj S. Joshi, On viability of isentropic perfect fluid collapse with a linear equation of state (2019)
  • [38] Ashok B. Joshi, Parth Bambhania, Dipanjan Dey, Pankaj S. Joshi, Timelike Geodesics in Naked Singularity and Black Hole Spacetimes II (2019)
  • [39] Dipanjan Dey, Prashant Kocherlakota, Pankaj S. Joshi, A General Relativistic Approach to Small-Scale Structure Formation (2019)
  • [40] Dipanjan Dey, Pankaj S. Joshi, Gravitational Collapse of Baryonic and Dark matter, Arab.J.Math., 8(4), 269-292 (2019)
  • [41] Uddipan Banik, Dipanjan Dey, Kaushik Bhattacharya, Tapobrata Sarkar, Self-gravitating fluid systems and galactic dark matter, General Relativity and Gravitation, 49(9), 116 (2017)
  • [42] Dipanjan Dey, Kaushik Bhattacharya, Tapobrata Sarkar, Galactic space-times in modified theories of gravity, General Relativity and Gravitation, 47, 103 (2015)
  • [43] Dipanjan Dey, Kaushik Bhattacharya, Tapobrata Sarkar, Astrophysics of Bertrand Space-times, Physical Review D, 88, 083532 (2013)
  • [44] Dipanjan Dey, Kaushik Bhattacharya, Tapobrata Sarkar, Galactic Dark Matter and Bertrand Space-times, Physical Review D, 87(10), 103505 (2013)

 

Update Time: 2025-06-10 23:13:56