Dr. Dhruba Jyoti Gogoi

I'm a

About

Assistant Professor at Department of Physics, Moran College.
Adjunct Assistant Professor at Theoretical Physics Division, CAS, Dibrugarh University.
A Cosmology and Astrophysics Enthusiast, Programmer, Bug Hunter and a Dreamer. Currently, I am studying different properties of Gravitational Waves. I am also interested in Compact stellar objects, modified gravity, General Theory of Relativity, Pulsar Timing Arrays and Cosmic Rays. Apart from that, I like to read and write poems.

At the International Conference on Gravitation and Cosmology (ICGC), IISER Mohali ( December 2019)

Full Time Researcher & Dedicated Programmer.

Dedicated to studying different properties of Gravitational Waves in different modified theories.

Personal Details

  • Email: moloydhruba@yahoo.in and moloydhruba@gmail.com
  • Degree: Ph.D. in Physics
  • University: Dibrugarh University, Dibrugarh, Assam
  • Life Member of the Indian Association for General Relativity and Gravitation (IAGRG)
  • Member of the International Association of Mathematical Physics (IAMP)
  • Life Member of the Indian Mathematical Society (IMS) (Membership no. L/2021/36)
  • Member of Working Group 03 of action - Addressing observational tensions in cosmology with systematics and fundamental physics (CosmoVerse) of European Cooperation in Science and Technology
  • Web of Science profile: AAF-4013-2021
  • Scopus profile: 57226032682
  • Loop profile: 1695590

Skills

C++
C
ROOT by CERN
FORTRAN77
GNUPlot
Unix Shell Scripting
Mathematica
Matlab
SciLab
Public Speaking
Mixed Programming
Applied Psychology
HTML
Poetry
Latex
Data Analysis
Python
Maple

About our research

Our research works include study of Gravitational Waves (GWs) in different modified theories of gravity. In General Relativity, GWs are massless, transverse and traceless in nature. There are two polarization modes of GWs in General Relativity. They are tensor plus and cross modes of polarizations of GWs. However, recent studies show that in modified theories of gravity polarization modes may change depending on the type of modifications imposed. A promising extension of General Relativity is f(R) gravity where instead of Ricci scalar, R, the Lagrangian of the theory is proportional to a function of R. In f(R) gravity metric formalism, there are three degrees of freedom associated with the theory and the number of polarization modes at weak field regime is three viz., tensor plus, tensor cross and massive scalar modes of polarization. The massive scalar mode is actually a mixed polarization mode and it consists of massless transverse breathing mode and massive longitudinal mode. In the paper Gravitational Waves in f (R) Gravity Power Law Model, Indian Journal of Physics 96, 637 (2022) , we have studied polarization modes of GWs in f(R) gravity metric formalism and shown that for a special case of the model, we can have massless breathing scalar modes of GWs with non-vanishing trace as a third polarization mode of GWs at weak field regime. It is only case in f(R) gravity metric formalism where GW is completely massless in nature. This work was followed by the paper A new f (R) Gravity Model and properties of Gravitational Waves in it, Eur. Phys. J. C 80, 1101 (2020) , in which we have introduced a new dark energy f(R) gravity model and studied the polarization modes in metric formalism. We have constrained the model using GW event GW170817 and studied the possibility of massive GWs using Pulsar Timing Array data. We have also seen that the model behaves well in the solar system regime and is free from general stability issues.

We have also studied the black hole solutions and quasinormal modes of GWs in different modified theories of gravity. In the work, Quasinormal Modes of Black Holes with Non-Linear-Electrodynamic sources in Rastall Gravity, Physics of the Dark Universe, 100860 (2021), we have studied the quasinormal modes of a non-linearly charged black hole surrounded by dark energy fields in Rastall gravity. A similar study was done in the paper Quasinormal Modes of Non-Linearly Charged Black Holes surrounded by a Cloud of Strings in Rastall Gravity, arXiv:2111.00854 (2021), where we have introduced a new non-linearly charged black hole solution and compared it with the well-known Ayón-Beato-García (ABG) black hole.

We have also studied the cosmological implications of the new f(R) gravity model (known as Gogoi-Goswami f(R) gravity model) introduced by us in Palatini formalism and constrained it using Observed Hubble Data (OHD) in the paper Cosmology with a new f(R) gravity model in Palatini formalism, arXiv:2108.01409 (2021), which has been accepted for publication in IJMPD.

For more details about our research, kindly check our publications.

Publications

Papers/Preprints

  • S. Mandal, S. Das, D. J. Gogoi and A. Pramanik, Leading-order corrections to the thermodynamics of Rindler modified Schwarzschild black hole, Accepted for publication by Physics of the Dark Universe (2023), [arXiv:2308.05712 ].

  • D. J. Gogoi, N. Heidari, J. Kříž, and H. Hassanabadi, Quasinormal Modes and Greybody factors of AdS/dS Black holes surrounded by Quintessence in Rastall gravity, Fortschr. der Phys., 2300245 (2024) [arXiv:2307.09976 ].

  • D. J. Gogoi, J. Bora, M. Koussour, and Y. Sekhmani, Quasinormal Modes and Optical Properties of 4-D black holes in Einstein Power-Yang-Mills Gravity, Annals of Physics 458, 169447 (2023), [arXiv:2306.14273 ].
    DOI: 10.1016/j.aop.2023.169447 (Impact Factor 3).

  • Y. Sekhmani, D. J. Gogoi, M. Baouahi,and I. Dahiri, Thermodynamic geometry of STU black holes, Physica Scripta (2023) (Impact Factor 2.9).

  • D. J. Gogoi, Ali Övgün and Durmuş Demir, Quasinormal modes and greybody factors of symmergent black hole, Physics of the Dark Universe 42, 101314 (2023), [arXiv:2306.09231 ].
    DOI: 10.1016/j.dark.2023.101314 (Impact Factor 5.5).

  • J. Bora, D. J. Gogoi S. K. Maurya and G. Mustafa, Impact of energy-momentum conservation violation on the configuration of compact stars and their GW echoes, Preprint (2023), [arXiv:2306.01024 ].

  • N. Parbin, D. J. Gogoi and U. D. Goswami, Weak gravitational lensing and shadow cast by rotating black holes in axionic Chern-Simons theory, Physics of the Dark Universe 41, 101265 (2023).
    DOI: 10.1016/j.dark.2023.101265 (Impact Factor 5.5) [arXiv:2305.09157 ].

  • N. Myrzakulov, M. Koussour and D. J. Gogoi, A new f(Q) cosmological model with H(z) quadratic expansion, Physics of the Dark Universe 42, 101268 (2023).
    DOI: 10.1016/j.dark.2023.101268 (Impact Factor 5.5).

  • Gaetano Lambiase, Reggie C. Pantig, D. J. Gogoi and A. Övgün, Investigating the Connection between Generalized Uncertainty Principle and Asymptotically Safe Gravity in Black Hole Signatures through Shadow and Quasinormal Modes, Eur. Phys. J. C 83, 679 (2023).
    DOI: 10.1140/epjc/s10052-023-11848-6 (Impact Factor 4.4).
    • [arXiv:2304.00183 ].

  • Y. Sekhmani and D. J. Gogoi, Electromagnetic Quasinormal Modes of Dyonic AdS Black Holes with Quasi-Topological Electromagnetism in a Horndeski Gravity Theory Mimicking EGB Gravity at D → 4, Int. J. Geom. Methods Mod. Phys., S0219887823501608 (2023).
    DOI: 10.1142/S0219887823501608 (Impact Factor 1.873).

  • M. Koussour, S. Arora, D. J. Gogoi , M. Bennai, P. K. Sahoo, Constant sound speed and its thermodynamical interpretation in f(Q) gravity, Nuclear Physics B 990, 116158 (2023).
    DOI: 10.1016/j.nuclphysb.2023.116158 (Impact Factor 3.045).
    • [arXiv:2303.14138 ].

  • R. Karmakar, D. J. Gogoi and U. D. Goswami, Thermodynamics and Shadows of GUP-corrected Black Holes with Topological Defects in Bumblebee Gravity, Physics of the Dark Universe 41, 101249 (2023).
    DOI: 10.1016/j.dark.2023.101249 (Impact Factor 5.090) [arXiv:2303.00297 ].

  • D. J. Gogoi, Y. Sekhmani et al., Joule-Thomson Expansion and Optical Behaviour of Reissner-Nordström-Anti-de Sitter Black Holes in Rastall Gravity Surrounded by a Quintessence Field, Fortschritte Der Physik 71, 2300010 (2023).
    DOI: 10.1002/prop.202300010 (Impact Factor 5.532).

  • N. Parbin, D. J. Gogoi, J. Bora and U. D. Goswami, Deflection angle and quasinormal modes of a de Sitter black hole in f(T,B) gravity, preprint (2022) [arXiv:2211.02414 ].

  • R. Karmakar, D. J. Gogoi and U. D. Goswami, Quasinormal modes and thermodynamic properties of GUP-corrected Schwarzschild black hole surrounded by quintessence, Int. J. Mod. Phys. A 37, 2250180 (2022).
    DOI: 10.1142/S0217751X22501809 (Impact Factor 1.475) [arXiv:2206.09081 ].

  • D. J. Gogoi and U. D. Goswami, Quasinormal Modes and Hawking Radiation Sparsity of GUP Corrected Black Holes in Bumblebee Gravity with Topological Defects, JCAP 06, 029 (2022).
    DOI: 10.1088/1475-7516/2022/06/029 (Impact Factor 7.280) [arXiv:2203.07594 ].

  • D. J. Gogoi, R. Karmakar and U. D. Goswami, Quasinormal Modes of Non-Linearly Charged Black Holes surrounded by a Cloud of Strings in Rastall Gravity, Int. J. Geom. Methods Mod. Phys. 20, 2350007 (2023).
    DOI: 10.1142/S021988782350007X (Impact Factor 1.873) [arXiv:2111.00854 ].

  • D. J. Gogoi and U. D. Goswami, Quasinormal Modes of Black Holes with Non-Linear-Electrodynamic sources in Rastall Gravity, Physics of the Dark Universe 33 , 100860 (2021).
    DOI: 10.1016/j.dark.2021.100860 (Impact Factor 5.090) [arXiv:2104.13115].

  • D. J. Gogoi and U. D. Goswami, A new f (R) Gravity Model and properties of Gravitational Waves in it, Eur. Phys. J. C 80, 1101 (2020).
    DOI: 10.1140/epjc/s10052-020-08684-3 (Impact factor 4.991)

Peer Review

  • Achieved IOP (Institute of Physics) trusted Reviewer status (2022) in recognition of an exceptionally high level of peer review competency ( view credential ).
  • Physica Scripta (IOP, impact factor: 3.081)
  • Classical and Quantum Gravity (IOP, impact factor: 3.853)
  • Physics of the Dark Universe (Elsevier, impact factor: 5.090)
  • European Physical Journal Plus (Springer, impact factor: 3.4)
  • New Astronomy (Elsevier, impact factor: 2.096)
  • Al-Bahir Journal for Engineering and Pure Sciences (ISSN 2312-5721)

Conferences attended

Papers presented:

  • Delivered a contributory talk on “Quasinormal modes from GUP corrected Black Holes in Bumblebee Gravity with Topological Defects” at An Inaugural Conference on Current Status of Cosmology during October 17-19, 2022, hosted by the Thanu Padmanabhan Center for Cosmology and Science Popularization(CCSP) SGT University, Delhi- NCR.
  • Delivered a contributory talk on “Impact of Energy-Momentum conservation violation on the Quasinormal modes of a non-linearly charged Black Hole” at an International conference on Cosmology & Gravity (CosmoGrav22) during March 23-24, 2022, hosted by ICARD, Department of Physics, Gurukul Kangri (Deemed to be University), Haridwar, Uttarakhand, India.
  • Presented titled “A modified set of Newman-Penrose quantities to study Polarization modes of Gravitational Waves” at XXIV DAE-BRNS High Energy Physics Symposium, December 14-18, 2020 hosted by National Institute of Science Education and Research (NISER), Odisha.
  • Delivered a talk on “Polarization Modes of Gravitational Waves in a New f(R) Gravity Model”, at the North East Meet of Astronomers (NEMA) VI (2020), hosted and organised by the Department of Physics, IIT Guwahati, during November 10 - 13, 2020.
  • Delivered a talk on “Gravitational Waves in f (R, Lm ) Gravity”, at the International E-Conference on New Frontiers in Science and Technology 2020, hosted and organised by the Manipur university, during July 09 - 11, 2020.
  • Presented titled “Polarization Modes of Gravitational Waves in Hu Sawicki Model and Rastall Gravity”, at the 9th International Conference on Gravitation and Cosmology (ICGC) 2019, hosted by the Indian Institute of Science Education and Research Mohali (IISERM) and organized by the Indian Association for General Relativity and Gravitation, (10 - 13 December, 2019).
  • Presented titled “Gravitational Waves from Pure R^2 Gravity” at the 30th meeting of the Indian Association for General Relativity and Gravitation (IAGRG) 2019, BITS Pilani, Hyderabad Campus, India, (3-5 January, 2019).

Invited Talks

  • Acted as a resource person at 3 days Workshop on Scilab organised by Department of Physics, DDR College, Chabua during 21-23 September 2023.
  • Delivered invited guest lectures at DHSK College, Dibrugarh, Assam (India) in December 2021 on Quantum mechanics and Scilab.
  • Delivered talks as a resource person at the IQAC sponsored 3-Days workshop on “Computational Physics” held from 25th to 27th Nov’21, at Tinsukia College, Tinsukia, Assam, India.
  • Delivered two talks at UGC Sponsored National Workshop on General Relativity and Astronomy 2018, (NWGRA 2018), Department of Physics, Tinsukia College, Tinsukia, Assam, India.

Book Chapters

1. N. Parbin, J. Bora and D. J. Gogoi, "Applications of Pseudo-Spectral Method and Matrix Numerov Method in Anharmonic Potential Problem", 73, Research Trends in Science and Technology ISBN:978- 93-5570-344-6, Editors: Dr. Mukunda Madhab Borah and Dr. Kuldeep Gogoi, AkiNik Publications, DOI:https://doi.org/10.22271/ed.book.1907
2. D. J. Gogoi and J. Bora, "Comments on a Non-Lagrangian Energy Momentum Conservation Violating Theory", p19-23, Frontiers in Basic Physics and Applications (Volume II) ISBN:9788194871934, Editors: D. K. Banik, N. M. Nath, S. K. Banik, K. J. Nath, Knowledge Publications.
3. J. Bora and D. J. Gogoi, "Viable f(R) gravity models", p13-18, 2021, Frontiers in Basic Physics and Ap- plications (Volume II), ISBN: 9788194871934, Editors: D. K. Banik, N. M. Nath, S. K. Banik, K. J. Nath, Knowledge Publications.
4. R. Changmai, J. Bora and D. J. Gogoi, Efficient Numerical Solution of Differential Equations using Pseudo- Spectral Methods with Bernstein Basis., Frontiers in Physical Sciences ISBN: 978 − 93 − 93092 − 29 − 8, Editors: Dr. R. Changmai and Dr. T. G. Devi.

Resume

Education

Dibrugarh University, Dibrugarh

2018 - 2023

Ph.D. in GW Physics

GATE

2020

Physics

UGC CSIR NET LS

2016 - December

Physics

AIR 92

Dibrugarh university

2015 - 2017

M.Sc., Physics

Specialization: HEP

Tinsukia College, Tinsukia

2012 - 2015

B.Sc. in Physics (PCM)

First Class 5th

DHSK College, Dibrugarh

2009 - 2011

H.S.

(PCM)

Lezai H. S. School, Dibrugarh

2009

H.S.L.C.

Dstn.

Visits

Visited IUCAA, Pune for research purposes in 2019.
Visited and worked at GRAPES3 project, an India-Japan collaboration, Ooty, TIFR in 2017.
Selected as JRF at TIFR in 2017 (did not join).

Courses & Certification

COVID-19 Contact Tracing

Chinese for Beginners, Peking University (Coursera)

COVID-19: What You Need to Know (CME Eligible), Osmosis (Coursera)

Quantum Mechanics, University of Colorado Boulder (Coursera)

First Step Korean, Yonsei University (Coursera)

How to Write and Publish a Scientific Paper (Project-Centered Course), École Polytechnique (Coursera)

Psychological First Aid, Johns Hopkins University (Coursera)

Online Certificate Course in Python Programming, VLSI-Embedded -AE Department, National Institute of Electronics & Information Technology, Chennai

Projects

Master's project

2017
  • "A study on muons and electrons in Extensive Air Showers of energy 10^14 − 10^15 eV using CORSIKA" under guidance of Dr. Umananda Dev Goswami, Associate Professor, Department of Physics, Dibrugarh University.

DPlot

Ongoing
  • A GUI based plotting program capable of producing ROOT based plots.

DPlot - lite

Aug 2020 - September 2020
  • Terminal based program to read and plot data files in a folder and produce ROOT files.

Experience

Assistant Professor (on contract)

Department of Physics, Dibrugarh University

August 06, 2018 - October 09, 2023
  • Papers taught: Quantum Mechanics, Observational Astronomy and Computational Physics
  • Involved in tabulation, paper setter etc.

Tutor

M. R. Learning Solutions

2012 - 2018
  • I had an amazing experience while teaching at M. R. Learning Solutions.

Conferences/workshops:

  • National Workshop on The General Relativity and Astronomy - Its foundations and current trends, Department of Physics, Tinsukia College, (January 28-30, 2015).
  • National Conference on Current Issues in Cosmology, Astrophysics and High Energy Physics (CICAHEP), Department of Physics, Dibrugarh University, (November 2-5, 2015).
  • Winter School on AstroParticle Physics (WAPP) 2016. CRL, TIFR, Ooty, Tamil Nadu, India.
  • National Workshop on Gravitational Wave Astronomy (NWGWA), Department of Physics, Dibrugarh University, (November 2-4, 2016).
  • Light: not a Light Matter – a Students’ Symposium, Student Chapter, Department of Physics, Dibrugarh University and IIT Guwahati, (12th November, 2016).
  • Workshop on Air Pollution, Greenhouse Gases and Climate Change: Global and Regional Perspective, Centre for Atmospheric Studies and the Department of Physics, Dibrugarh University, (27-29 April, 2017).
  • SERB School on Observational Astronomy, Department of Physics, Tezpur University, Tezpur, Assam, (25 th October to 14 th November, 2017).
  • Workshop on “Emerging Trends in Online Evaluation System” organized by IQAC, P N Das college on 15-09-20.
  • 5-Day FDP on APPLIED MATHEMATICS SKILLS FOR SCIENCE & ENGINEERING USING CONTEMPORARY SOFTWARE TOOLS Organized by Department of Applied Science MAULANA ABUL KALAM AZAD UNIVERSITY OF TECHNOLOGY, West Bengal, India in association with ISLAMIC UNIVERSITY OF SCIENCE AND TECHNOLOGY, Jammu and Kashmir,INDIA (14th - 18th September, 2020).
  • " Introductory Seminar on Astrophysics and Cosmology" webinar organized by ICARD, North Bengal University on September 16, 2020.
  • Faculty Development Program on "Artificial Intelligence and Machine Learning" , conducted from 07 to 09 Sept 2020, by Department of Computer Science Engineering, Sri Balaji College of Engineering and Technology, Jaipur.
  • Online Faculty Development Programme on Mathematica - A system for Modern Technical Computing, Organized by Mahatma Hansraj Faculty Development Center (MHRFDC) (A Centre of MHRD under PMMMNMTT Scheme), Hansraj College, University of Delhi, India, August 21-26, 2020.
  • "An Introductory Course on Fluid Dynamics" organized by the Department of Mathematics, CHRIST (Deemed to be University), Bangalore during 17-20 August, and 24-28 August 2020.
  • 5 DAY FDP on " DISCRETE MATHEMATICS , GRAPH THEORY AND ITS APPLICATIONS organized by Department of Applied Sciences & Humanities in association with IQAC, Universal Engineering College Vallivattom from 17August 2020 to 21 August 2020.
  • One Day International Level Webinar on "A MATHEMATICAL REMEDY OF HEART ATTACK: ARTIFICIAL INTELLIGENCE AS A LIFE SAVING KIT” on 16th August ,2020 organised by DEPARTMENT OF Physics OF SHIBPUR DINOBUNDHOO INSTITUTION (COLLEGE).
  • Three days National Faculty Development Program on "Matlab and it's Application" organised by Bishop Cotton Women's Christian College (17-19 August, 2020).
  • Seven days Faculty Development Program on "Basics of Python Programming" conducted by Jorhat EC of NIELIT Guwahati and in collaboration with J B College, Jorhat, Assam (22-28.07.2020).
  • One Week National Level online Faculty Development Program on LaTex+Xfig, Organised by IT Cell, H.P.B. Girls’ College, Golaghat, Assam, in association with Spoken Tutorial Project, IIT Bombay-NMEICT, MHRD, August 3-8, 2020.

Others

Editorial/Organiser etc.

  • Co-Convener at National Conference on Physical Sciences 2022 (NCPS-2022), organized jointly by Manipur University, Manipur, India and DHSK College, Assam, India during 29-30 April, 2022 (Conference site: https://ncps2022.wordpress.com)

  • Associate Editor of a book titled "Frontiers in Physical Sciences"- a collection of research articles presented in National Conference on Physical Sciences 2022 (NCPS-2022), organized jointly by Manipur University, Manipur, India and DHSK College, Assam, India during 29-30 April, 2022 (Conference site: https://ncps2022.wordpress.com), ISBN: 978−93−93092−29−8

Books authored

  • Neelim Swapnar Sandhanot

    2014
    Assamese poem collection

  • Tumiheenotar Pora Abulialoi

    2017
    Assamese poem collection

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