Shibesh Kumar Jas Pacif

Shibesh Kumar Jas Pacif

Name: Shibesh Kumar Jas Pacif

Profile: Professor

Founder & President / Managing Trustee of Pacif Educational and Welfare Trust

Director & Founder of Pacif Institute of Cosmology and Selfology (PICS)


Phone: +91-8826244791


Institution: Pacif Institute of Cosmology and Selfology (PICS)
At/Po:- Sagara
Dist.:- Sambalpur
PIN:- 768224
State- Odisha

Date of Birth: 22 June 1980

NBHM Post-Doctoral Fellow
Centre for Theoretical Physics,Jamia Millia Islamia, New Delhi,India
Topic: In Search of a Realistic Model of the Universe: Theoretical Constructions and Explanations to Observations, Mentor: Prof. M. Sami
Year: 2018

Banaras Hindu University,Varanasi,India
Ph.D.(Mathematics, Specialization: Relativity & Cosmology)
Department of Mathematics, Faculty of Science Thesis: Some Studies on Cosmological Models in General Relativity Advisor: Prof. Abdussattar
Year: 2011

Sambalpur University,Odisha,Odisha
M. Phil.(Mathematics, Specialization: Gravitation)
School of Mathematical Sciences Dissertation: Some physical distributions in general theory of relativity Advisor: Prof. G. Mohanty
Year: 2003

Sambalpur University,Odisha,Odisha
M. Sc.(Mathematics, Specialization: Graph Theory)
School of Mathematical Sciences Dissertation: Entire functions and Weirstrass factorization theorem Advisor: Prof. N. Das
Year: 2002

Sambalpur University,Odisha,India
B. Sc.(Mathematics, Physics, Chemistry)
Dalmia College, Rajgangpur, Odisha
Year: 2000

Council of Higher Secondary Education,Bhubaneshwar, Odisha,Bhubaneshwar, Odisha
10+2(Science Stream: Mathematics, Physics, Chemistry)
Year: 1997

Board of Secondary Education,Bhubaneshwar, Odisha,Bhubaneshwar, Odisha
Year: 1995

About me

I am a cosmologist and mathematician with a deep passion for science popularization. My area of expertise lies in relativity and cosmology, where I focus on studying the late universe’s cosmological evolution. My research interests include dark energy, cosmological modelling, observational constraints, and parameter estimation in general relativity, and modified theories of gravity.

I have held a Ph.D. from Banaras Hindu University, Varanasi, with a thesis on “Some studies on cosmological models in general relativity” in 2011. I was awarded the prestigious National Board of Higher Mathematics (NBHM) post-doctoral fellowship (funded by the Department of Atomic Energy, Govt. of India) and completed three years of post-doctoral research at the Centre for Theoretical Physics, Jamia Millia Islamia, New Delhi. During this time, I was actively involved in the Taramandal outreach program of CTP, JMI, conducting science popularization programs for school students with the help of a mobile planetarium together with my hard-core research in cosmology, resulting in several high-impact research publications.

I have a teaching experience of more than thirteen years in mathematics, imparting knowledge at different esteemed institutions in India. These include VIT University in Vellore, Manipal University in Jaipur, ITM University in Gurgaon, Jamia Millia Islamia in New Delhi, Uttar Pradesh Technical University in Lucknow, and Mahamaya Technical University in Noida (which is now known as Abdul Kalam Technical University in Lucknow). During my tenure, I have taught a diverse range of subjects such as engineering mathematics, operations research, mathematical physics, graph theory, modern and linear algebra, differential equations, analysis, modelling and simulations, probability and statistics, as well as value education and several other courses. I have collaborated extensively with researchers and academicians nationally and internationally.

As an avid science popularizer, I am deeply committed to promoting science education, rational thinking, and scientific temperament in society. I have organized and conducted several science popularization programs, including public lectures, discussions, and sharing of scientific thoughts through social media, mobile planetarium programs, and sky-watching with a telescope. I am currently running an online science popularization program aimed to develop scientific temper among kids, students, and enthusiastic people of all ages.

With my extensive expertise and diverse professional experience, I received an invitation to join SGT University in Gurugram, where I had played an important role in establishing the Centre for Cosmology and Science Popularization (CCSP) as the first founding member. For a few years I worked dedicatedly and achieved significant accomplishments through my outreach activities and core research.

Recently, I embarked on a new journey by establishing the Pacif Educational and Welfare Trust, where I serve as the president & Managing Trustee of the trust. In line with the trust's mission, the first unit of the trust is founded namely, Pacif Institute of Cosmology and Selfology (PICS) as a dedicated research institute, where I have taken over the charge of the Director. The primary motivation behind PICS is to provide a cohesive platform for exploring both the vast universe and the intricate nature of the self. For further information and comprehensive details, I invite you to visit the website at


Science Popularization Talks.

Shibesh Kumar Jas Pacif

Knowing the Universe and Developing Scientific Temper

SGT University, Gurugram / 2023-03-15
Shibesh Kumar Jas Pacif

The Physical Universe and it’sMathematical Modelling

DDU Gorakhpur University, Gorakhpur / 2023-02-04
Shibesh Kumar Jas Pacif


Garposh, Sambalpur, Odisha / 2023-02-23
Shibesh Kumar Jas Pacif

Knowing the Universe and Developing Scientific Temper

Pindapathar High School and M. E. School, Odisha / 0000-00-00
Shibesh Kumar Jas Pacif

Knowing the Universe and Developing Scientific Temper

Sagara U P School / 0000-00-00
Shibesh Kumar Jas Pacif

National Mathematics Day

P. G. Department of Mathematics, Fakir Mohan University, Balasore, Odisha / 2023-12-22
Shibesh Kumar Jas Pacif

Stargazing Session

Adhyayan Academy, Garposh / 2024-01-27
Shibesh Kumar Jas Pacif

Republic Day Celebration

Adhyayan Academy, Garposh / 2024-01-26
Shibesh Kumar Jas Pacif

Knowing the Universe: A Multifaceted Expedition

Shri Ramswaroop Memorial University, Lucknow, India / 2024-02-22


Core area
Relativity, Cosmology, Gravitation, Astronomy

Work area
Cosmological modelling, Dark energy modelling, Scalar field modelling, Modelling in modified theories of gravity (f(R, T), f(R), f(Q), f(Q,T) etc.).
Reconstructing cosmic evolution, Cosmological parametrization, Cosmological tests Cosmography, Observational constraints, Dynamical system analysis, Cosmological diagnostics, Energy Conditions.
Gravitational collapse, Exact solutions, Bouncing, Black hole and Worm hole solutions.
Radio Astronomy

Research Publications

2023: Cosmo-dynamics of dark energy models resulting from a parametrization of H in f (Q, T) gravity
Viraj Kalsariya, S. K. J. Pacif

Accepted for Publication in Euro Phys. J. Plus

2023: Some diagnostic analysis of dark energy models with q(z) parametrizations
Dhruv Arora, S. K. J. Pacif

Under review in Chinese Physics Letters

2023: Model-independent study for a quintessence model of dark energy: Analysis and Observational constraints
Amine Bouali, Himanshu Chaudhary, Amritansh Mehrotra, S. K. J. Pacif

Under review in Fortschritte der Physik.

2023: Astrophysical implications of an eternal homogeneous gravitational collapse model with a parametrization of expansion scalar
Annu Jaiswal, Rajesh Kumar, Sudhir Kumar Srivastava, S. K. J. Pacif

Accepted for publication in Euro. Phys. J. C

2023: Eternal homogeneous gravitational collapse: A comprehensive analysis from Θ parametrization
Annu Jaiswal, Rajesh Kumar, Sudhir Kumar Srivastava, S. K. J. Pacif

Under review in Euro. Phys. J. Plus

2023: Cosmological implications of an interacting model of dark matter & dark energy
Keshav Ram Mishra, S. K. J. Pacif, Rajesh Kumar, Kazuharu Bamba

Published in: Phys. Dark Univ. 40 (2023) 101211 arXiv: 2301.08743 [gr-qc]

2023: Generic Modification of Gravity, Late Time Acceleration and Hubble Tension
Mayukh R. Gangopadhyay, S. K. J. Pacif, Mohammad Sami, Mohit K. Sharma

Universe 9 (2023) 2, 83

2022: Late-time acceleration in f(Q) gravity: Analysis and constraints in an anisotropic background
M. Koussour, K. El Bourakadi, S.H. Shekh, S. K. J. Pacif, M. Bennai

Annals Phys. 445 (2022) 169092

2022: A New Parametrization of Hubble Parameter in f(Q)Gravity
M. Koussour, S. K. J. Pacif, M. Bennai, P. K. Sahoo

Fortsch.Phys. 71 (2023) 4-5, 2200172

2022: The oscillatory universe, phantom crossing and the Hubble tension
Mohit K. Sharma, S. K. J. Pacif, Gulmira Yergaliyeva, Kuralay Yesmakhanova

Annals Phys. 454 (2023) 169345

2022: Reconstructing cosmic evolution with a density parametrization
Ritika Nagpal, S. K. J. Pacif, Abhishek Parida

Mod. Phys. Lett. A 37 (2022) 18, 2250112

2021: Observational constraints on the massive neutrinos induced late-time cosmic acceleration
Mohit K. Sharma, S. K. J. Pacif, Shynaray Myrzakul, Zamzagul Shanina

Phys. Scripta 97 (2022) 8, 085010

2021: Cosmological aspects of f(R, T) gravity in a simple model with a parametrization of q
Ritika Nagpal, S. K. J. Pacif

Eur. Phys. J. Plus 136 (2021) 8, 875

2021: Bulk viscous matter and the cosmic acceleration of the universe in f(Q,T) gravity
Simran Arora, S. K. J. Pacif, Abhishek Parida, P.K. Sahoo

J. High Energy Astrohys. 33 (2022) 1-9

2021: Cosmic acceleration with bulk viscosity in modified f(Q) gravity
Raja Solanki, S. K. J. Pacif, Abhishek Parida, P. K. Sahoo

Phys. Dark Univ. 32 (2021) 100820

2021: Late-time acceleration with a scalar field source: Observational constraints and statefinder diagnostics
S. K. J. Pacif, Simran Arora, P. K. Sahoo

Phys. Dark Univ. 32 (2021) 100804

2020: Effective equation of state in modified gravity and observational constraints
Simran Arora, Xin-he Meng, S. K. J. Pacif, P. K. Sahoo

Class. Quant. Grav. 37 (2020) 20, 205022

2020: f(Q,T) gravity models with observational constraints
Simran Arora, S. K. J. Pacif, Snehasish Bhattacharjee, P. K. Sahoo

Phys. Dark Univ. 30 (2020) 100664

2020: Dark energy models from a parametrization of H: A comprehensive analysis and observational constraints
S. K. J. Pacif

Eur. Phys. J. Plus 135 (2020) 10, 792

2020: Accelerating Universe in Hybrid and Logarithmic Teleparallel Gravity
Sanjay Mandal, Snehasish Bhattacharjee, S. K. J. Pacif, P. K. Sahoo

Phys. Dark Univ. 28 (2020) 100551

2019: An Accelerating Cosmological Model from a Parametrization of Hubble Parameter
S. K. J. Pacif, Md Salahuddin Khan, L. K. Paikroy, Shalini Singh

Mod. Phys. Lett. A 35 (2019) 05, 2050011

2020: Viability of the R+e^T cosmology
P. H. R. S. Moraes, P. K. Sahoo, S. K. J. Pacif

Gen. Rel. Grav. 52 (2020) 4, 32

2018: Bouncing cosmology in f(R,T) gravity
J. K. Singh, Kazuharu Bamba, Ritika Nagpal, S. K. J. Pacif

Phys. Rev. D 97 (2018) 12, 123536

2018: Analysis with observational constraints in Λ-cosmology in f(R,T) gravity
Ritika Nagpal, S. K. J. Pacif, J. K. Singh, Kazuharu Bamba, A. Beesham

Eur. Phys. J. C 78 (2018) 11, 946

2019: Cosmic acceleration from coupling of baryonic and dark matter components: Analysis and diagnostics
Abhineet Agarwal, R. Myrzakulov, S. K. J. Pacif, M. Shahalam

Int. J. Mod. Phys. D 28 (2019) 06, 1950083

2017: Statefinder diagnostic for modified Chaplygin gas cosmology in f(R,T) gravity with particle creation
J. K. Singh, Ritika Nagpal, S. K. J. Pacif

Int. J. Geom. Meth. Mod. Phys. 15 (2017) 03, 1850049

2019: Cosmic acceleration sourced by modification of gravity without extra degrees of freedom
Abhineet Agarwal, R. Myrzakulov, S. K. J. Pacif, M. Sami, Anzhong Wang

Int. J. Geom. Meth. Mod. Phys. 16 (2019) 08, 1950128

2017: LRS Bianchi type-I cosmological model with constant deceleration parameter in f(R,T) gravity
BIinaya K. Bishi, S. K. J. Pacif, P. K. Sahoo, G. P. Singh

Int. J. Geom. Meth. Mod. Phys. 14 (2017) 11, 1750158

2018: Anisotropic cosmological models with two fluids
B. Mishra, Pratik P. Ray, S. K. J. Pacif

Adv. High Energy Phys. 2018 (2018) 6306848

2017: Dark Energy Cosmological Models with General forms of Scale Factor
B. Mishra, Pratik P. Ray, S. K. J. Pacif

Eur. Phys. J. Plus 132 (2017) 10, 429

2017: Dynamics of Bianchi VIh universe with bulk viscous fluid in modified gravity
B. Mishra, S Tarai, S. K. J. Pacif

Int. J. Geom. Meth. Mod. Phys. 15 (2017) 03, 1850036

2017: Cosmological parametrizations and their scalar field descendents
S. K. J. Pacif, K. Myrzakulov, R. Myrzakulov

Physics and Astronomy International Journal 1(6) (2017) 00038

2016: Bianchi type string cosmological models in f(R,T) gravity
P. K. Sahoo, B. Mishra, Parbati Sahoo, S. K. J. Pacif

Eur. Phys. J. Plus 131 (2016) 9, 333

2016: Reconstruction of cosmic history from a simple parametrization of H
S. K. J. Pacif, R. Myrzakulov, S. Myrzakul

Int. J. Geom. Meth. Mod. Phys. 14 (2017) 07, 1750111

2016: Galileons, phantom fields, and the fate of the Universe
M. Shahalam, S. K. J. Pacif, R. Myrzakulov

Eur. Phys. J. C 76 (2016) 7, 410

2015: FLRW non-singular cosmological model in general relativity
S. K. J. Pacif, Bivudutta Mishra

Res. Astron. Astrophys. 15 (2015) 12, 2141

2015: Anisotropic cosmological model with a specific form of Hubble parameter
S. K. J. Pacif, B. Mishra

Astrophys. Space Sci. 360 (2015) 2, 48

2014: On the simultaneous variation of some cosmological parameters in the presence of interacting dark energy
S. K. J. Pacif, Abdussattar

Eur. Phys. J. Plus 129 (2014) 11, 244

2011: An Exact chameleon cosmological model unifying phantom inflation with late-time acceleration
Absussattar, S. R. Prajapati

Int. J. Theor. Phys. 50 (2011) 2355

2011: Friedman-Robertson-Walker models with late-time acceleration
Abdussattar, S. R. Prajapati

Chin. Phys. Lett. 28 (2011) 029803

2011: LRS Bianchi type-I perfect fluid cosmological model with modified generalized Chaplygin gas equation of state
Abdussattar, S. R. Prajapati

Astrophys. Space Sci. 332 (2011) 455

2011: Role of deceleration parameter and interacting dark energy in singularity avoidance
Abdussattar, S. R. Prajapati

Astrophys. Space Sci. 331 (2011) 657


M.Sc. Dissertation/Thesis
Completed: 2
Ongoing: 0

Ph.D. Thesis
Completed: 0
Ongoing: 2
Guided 1


Google Scholar:




Researcher ID:


Research gate:


University of Belgrade, Belgrade, Serbia, 09 - 14 Sept 2019
To attend the 10th Mathematical Physics Meeting: School and Conference on Modern Mathematical Physics & delivered a talk.

Yangzhou University, Yangzhou, China 18 - 20 Oct 2017
To attend the first symposium of the BRICS Association of Gravity, Astrophysics and Cosmology, Centre of Gravity and Cosmology.

Inter-University Centre for Astronomy and Astrophysics, Pune
02 April 2023 – 15 April 2023, 23 Dec 2022 – 31 Dec 2022, 01 Sept 2022 – 17 Sept 2022, 15 Aug 2018 – 15 Sept 2018, 24 Dec 2017 – 08 Jan 2018, 04 Jan 2017 – 09 Jan 2017, 14 Dec 2015 – 24 Dec 2015, 25 Nov 2013 – 05 Dec 2013, 25 Mar 2007 – 22 Apr 2007

International Centre for Cosmology, Gujarat, 18 - 23 Nov 2019

Centre for Theoretical Physics, New Delhi 09 - 10 Jul 2019


Through different science popularization program initiatives, such as the Taramandal programs (mobile planetarium), science popularization Talks, invited talks, and visits to schools, I have so far interacted with over 30,000 children of age group 7 – 21 years.

Online Science Popularization Program (my Start-up),2020
With a motivation to develop scientific temper among children (and all citizens), I am conducting science popularization programs through some innovative ideas & action plans. In this direction, I am running an online science popularization program for school students & other enthusiastic students of age group 7-21 by delivering and arranging talks and discussions related to astronomy, astrophysics, cosmology, biology, coding (and few other areas of science).

SCI-POP Group-1 (Junior),

SCI-POP Group-2 (Senior),

Science Popularization Program (at CCSP, SGTU),2021
Coordinator of the science popularization program of Centre for Cosmology and Science Popularization.

Web Link:

More than 80 science popularization Talks delivered both online and offline. Visited over 50 schools/colleges in various states in India and delivered talks on the theme “Knowing the Universe and Developing Scientific Temper”.


I have conducted more than 30 Taramandal Programs (with my team). Visited many schools, invited some schools, and conducted Taramandal shows and interacted with over 20000 students in Taramandal program.

  • At SGT University, (7 days, 1800 Attendees) 24-30 May 2023
  • Students visits to SGTU, SGT University, (60 Attendees)
  • At Synergy2022, SGTU, A Tech Fest at SGT University, (3 days, 7000 Attendees)10-12 November 2022
  • At Cosmology@ccsp_1, The Inaugural Conference of CCSP (100 Attendees)19 October 2022
  • At Taramandal astronomy show, at SGT University, (2 days, 1000 Attendees)01-02 June 2022
    Web Link:
  • At Centre for Theoretical Physics, Jamia Millia Islamia, New Delhi, (Conducted 22 programs at various Govt. schools near JMI and special schools in 2 Years, 2016-2018, 5000 Attendees)
    Web Link:


  • At CCSP Conference, 18 October 2022
  • At Telescope making workshop, CCSP, SGTU, 07 November 2022


Delivering talks & lectures and conducting discussion sessions at various schools, colleges, institutions, Universities and other gatherings on astronomy and cosmology since the past several years.
Web Links:


Appeared in newspaper “Dainik Jagaran” after my visit to DDU Gorakhpur University, Gorakhpur for delivering a memorial talk and a student’s talk,2023

Invited as a guest at a radio broadcast AWAZ the voice for a discussion on development of scientific temper and astronomy education.,2022
Web Links:

Invited as a guest at the Rozender Science, a YouTube channel for a discussion on the topic “Astronomy and Astrology”2019
Web Links:


Vishwa Ratna Samman (2024)

Received the Vishwa Ratna Samman for outstanding contribution towards Science Education and Research presented by Worthy Wellness Foundation, New Delhi on 27th February 2024.

Rashtra Ka Gourav Samman (2024)

Received the Rashtra Ka Gourav Samman for my achievements & contributions in Science Education and Research organized by Shreya Education Trust at New Delhi on 25th February 2024.

Indian Education Excellence Award (2024)

Received the Indian Education Excellence Award towards Most Dynamic & Iconic Role in Science Education of the year 2024 organized by IEMS and Brandmann India at New Delhi on 10th March 2024.

IOP Trusted Reviewer (2023)

Received the IOP Trusted Reviewer status by Institute of Physics (IOP) publishing for a high level of peer review competence in various SCI Journals of IOP.

IUCAA Associateship (2022)

Three-year (1 Aug 2022 – 31 Jul 2025) visiting associateship at Inter University Centre for Astronomy and Astrophysics, Pune

Post-Doctoral Fellowship (2022)

National Board of Higher Mathematics (NBHM) post-doctoral research fellowship for three-years (1 May 2015 – 30 Apr 2018) funded by Department of Atomic Energy, Government of India

IUCAA Associateship (2022)

Three-year (1 Aug 2022 – 31 Jul 2025) visiting associateship at Inter University Centre for Astronomy and Astrophysics, Pune

Prizes & Medals (2022)

Own the first prize, Gold Medal & Trophy and Own the third prize, Bronze Medal & Trophy as principal investigator at Synergy2022, SGT University tech fest for the projects “make your own telescope” and "Toys from waste materials", respectively.

UGC Research Fellowship (2007)

Research fellowship during PhD funded by University Grant Commission, Govt. of India

Positions in University (2000)

First position in B. Sc. (PCM Pass), Sambalpur University. Second position in M. Sc. entrance examination in Sambalpur University

Research Publications


Students Benefitted

Science Popularization TALKS


Shibesh Kumar Jas Pacif

Scientific Temperament

Fundamental duty of every citizen of Nature is to develop scientific temper, rational thinking, spirit of inquiry, acceptance with some deep understanding.

Shibesh Kumar Jas Pacif

Exploring the history of HISTORY

It is good to explore the history but it is more important to explore the science of the history. There is a field of history called "HISTORIOGRAPHY", which is the history of history.