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	== See also ==		== See also ==
	~~{{Portal\|India\|Physics}}~~
	* [[Somak Raychaudhury]]		* [[Somak Raychaudhury]]

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{{Infobox scientist
| name = Varun Sahni
| image =
| alt =
| caption =
| birth_date = {{Birth date and age|1956|3|29}}
| birth_place = India
| death_date =
| death_place =
| residence = [[Pune]], [[Maharashtra]], India
| nationality = [[Indian nationality|Indian]]
| fields = {{ublist | [[Astrophysics]] | [[Astronomy]] }}
| workplaces = {{ublist | [[Inter-University Centre for Astronomy and Astrophysics]] }}
| alma_mater =
| doctoral_advisor =
| doctoral_students =
| known_for = Studies on Dark Energy, large-scale structure of the Universe
| awards = {{ublist| 2000 [[Shanti Swarup Bhatnagar Prize]] | 2014 Homi Bhabha Medal}}
}}
'''Varun Bhisham Sahni''' (born March 29, 1956) is an Indian theoretical physicist, astrophysicist and a Distinguished Professor at the [[Inter-University Centre for Astronomy and Astrophysics]].<ref name=" Faculty">{{Cite web |url=http://www.iucaa.in:8080/iucaa/jsp/N-People.jsp |title= Faculty |date=2017-10-19 |website=Inter-University Centre for Astronomy and Astrophysics |access-date=2017-10-19}}</ref> Known for his research on cosmology,<ref name="Summary of faculty research interests">{{Cite web |url=http://www.iucaa.ernet.in/research.html |title=Summary of faculty research interests |date=2017-10-19 |website=Inter-University Centre for Astronomy and Astrophysics |access-date=2017-10-19 |archive-url=https://web.archive.org/web/20100611140022/http://www.iucaa.ernet.in/Research.html |archive-date=2010-06-11 |url-status=usurped }}</ref> Sahni is an elected fellow of all the three major Indian science academies viz. [[Indian Academy of Sciences]],<ref name="Fellow profile">{{Cite web |url=http://www.ias.ac.in/describe/fellow/Sahni,_Prof._Varun_Bhisham |title=Fellow profile |date=2017-10-17 |publisher=[[Indian Academy of Sciences]] |access-date=2017-10-17}}</ref> [[Indian National Science Academy]]<ref name="INSA Year Book 2016">{{Cite web |url=http://www.insaindia.res.in/pdf/YearBook_2016.pdf |title=INSA Year Book 2016 |date=2017 |publisher=[[Indian National Science Academy]]}}</ref> and [[National Academy of Sciences, India]].<ref name="NASI fellows">{{Cite web |url=http://www.nasi.org.in/fellows.asp?RsFilter=S |title=NASI fellows |date=2017 |publisher=National Academy of Sciences, India}}</ref> The [[Council of Scientific and Industrial Research]], the apex agency of the Government of India for scientific research, awarded him the [[Shanti Swarup Bhatnagar Prize for Science and Technology]], one of the highest Indian science awards, for his contributions to physical sciences in 2000.<ref name="View Bhatnagar Awardees">{{Cite web |url=http://ssbprize.gov.in/Content/AwardeeList.aspx |title=View Bhatnagar Awardees |date=2017-11-11 |publisher=Shanti Swarup Bhatnagar Prize |access-date=2017-11-11}}</ref>{{Refn|group=note|Long link - please select award year to see details}}

Sahni is reported to have studied the universe, more specifically its large-scale structure, the early inflationary phase and cosmological constant.<ref name="Brief Profile of the Awardee">{{Cite web |url=http://ssbprize.gov.in/Content/Detail.aspx?AID=24 |title=Brief Profile of the Awardee |date=2017-10-17 |publisher=Shanti Swarup Bhatnagar Prize |access-date=2017-10-17}}</ref> His achievements include the establishment of a cosmic no-hair theorem related to inflation, analysis of the universe structure using self-developed statistical methods, discovery of novel models of [[dark energy]] and [[dark matter]], design of unified models of Inflation and dark energy and the elucidation of [[Big Bang theory]] using [[Brane cosmology|Braneworld physics]].<ref name="Indian fellow">{{Cite web |url=http://insaindia.res.in/detail/P11-1555 |title=Indian fellow |date=2017-10-17 |publisher=Indian National Science Academy |access-date=2017-10-17}}</ref> His studies have been documented by way of a number of articles<ref name="On ResearchGate">{{Cite web |url=https://www.researchgate.net/profile/Varun_Sahni2 |title=On ResearchGate |date=2017-10-17 |access-date=2017-10-17}}</ref>{{Refn|group=note|Please see ''Selected bibliography'' section}} and the online article repository of the Indian Academy of Sciences has listed 68 of them.<ref name="Browse by Fellow">{{Cite web |url=http://repository.ias.ac.in/view/fellows/Sahni=3AVarun_Bhisham=3A=3A.html |title=Browse by Fellow |date=2017-10-17 |publisher=Indian Academy of Sciences |access-date=2017-10-17}}</ref>

Sahni is a member of the [[International Astronomical Union]].<ref name="IAU Members">{{Cite web |url=https://www.iau.org/administration/membership/individual/8343/ |title=IAU Members |date=2017-10-19 |website=International Astronomical Union |access-date=2017-10-19}}</ref> He has delivered plenary addresses at many conferences and seminars; "Cosmology after the BOOMERANG experiment" delivered at the Astronomy Seminars 2000 of the [[Tata Institute of Fundamental Research]]<ref name="Cosmology after the BOOMERANG experiment">{{Cite web |url=http://www.tifr.res.in/~space/sem00.html |title=Cosmology after the BOOMERANG experiment |date=2017-10-19 |website=Tata Institute of Fundamental Research |access-date=2017-10-19}}</ref> and Frontiers of Cosmology and Gravitation (ICGC 2011) of the [[International Centre for Theoretical Sciences]]
were two of them.<ref name="Frontiers of Cosmology and Gravitation">{{Cite web |url=https://www.icts.res.in/event/page/6606 |title=Frontiers of Cosmology and Gravitation |date=2017-10-19 |website=International Centre for Theoretical Sciences |access-date=2017-10-19}}</ref> The School of Applied Mathematical and Physical Sciences of the [[National Technical University of Athens]] has listed one of his talks on Dark matter and dark energy, delivered in March 2004, as the best cited among Aegean School talks.<ref name="Best-sited articles">{{Cite web |url=http://www.physics.ntua.gr/cosmo17/Sifnos2017/Best%20Cited%20Articles.pdf |title=Best-sited articles |date=2017-10-19 |website=National Technical University of Athens |access-date=2017-10-19}}</ref> He is also a recipient of the Homi Bhabha Medal (2014) of the Indian National Science Academy.<ref name="Homi Jehangir Bhabha Medal ">{{Cite web |url=http://insaindia.res.in/recipients.php#34 |title=Homi Jehangir Bhabha Medal |date=2017-10-19 |website=Indian National Science Academy |access-date=2017-10-19}}</ref>

== Selected bibliography ==
=== Chapters ===
* {{cite book|author1=Eleftherios Papantonopoulos|author2=Varun Sahni (Chapter author)|title=The Physics of the Early Universe|chapter-url=https://books.google.com/books?id=2fkFPh2jNIkC&pg=PA141|date=7 January 2005|publisher=Springer Science & Business Media|isbn=978-3-540-22712-0|pages=141–|chapter=Dark Matter and Dark Energy}}

=== Articles ===
* {{Cite journal |last=Varun Sahni, Peter Coles |title=Approximation Methods for Non-linear Gravitational Clustering |journal=Phys. Rep. |publication-date=1995 |volume=262 |pages=1–135 |doi=10.1016/0370-1573(95)00014-8|year=1995 |issue=1–2 |bibcode=1995PhR...262....1S |arxiv=astro-ph/9505005 |s2cid=119442929 }}
* {{Cite book |last=Varun Sahni |chapter =Dark Matter and Dark Energy |title=The Physics of the Early Universe |editor=E. Papantonopoulos |volume=653 |pages=141–180 |doi=10.1007/b99562|series=Lecture Notes in Physics |year=2005 |isbn=978-3-540-22712-0 |bibcode=2004LNP...653....3T }}
* {{Cite journal |last=Varun Sahni |title=Dark Energy |journal=Journal of Physics: Conference Series |publication-date=2006 |volume=31 |pages=115–122 |doi=10.1088/1742-6596/31/1/020|year=2006 |issue=1 |bibcode=2006JPhCS..31..115S |doi-access=free }}
* {{Cite journal |last=Varun Sahni, Arman Shafieloo, Alexei A. Starobinsky |title=Two new diagnostics of dark energy |journal=Phys. Rev. D |publication-date=2008 |volume=78 |issue=10 |pages=103502 |doi=10.1103/PhysRevD.78.103502|year=2008 |bibcode=2008PhRvD..78j3502S |arxiv=0807.3548 |s2cid=118452106 }}
* {{Cite journal |last=Varun Sahni |title=Ya. B. Zeldovich (1914-1987): Chemist, Nuclear Physicist, Cosmologist |journal=Resonance |date=2014 |volume=16 |pages=463–467 |arxiv=1403.1537|bibcode=2014arXiv1403.1537S }}

== See also ==
{{Portal|India|Physics}}
* [[Somak Raychaudhury]]

== Notes ==
{{Reflist|group=note|2}}

== References ==
{{Reflist|30em}}

== External links ==
* {{cite book|author=Asoke Nath Mitra|title=India in the World of Physics: Then and Now|url=https://books.google.com/books?id=hRLPM6s7hWAC&pg=PA452|year=2009|publisher=Pearson Education India|isbn=978-81-317-1579-6|pages=452–}}
* {{cite book|author1=Alfredo Macias|author2=Francisco Uribe|author3=Enrique Diaz|title=Developments in Mathematical and Experimental Physics: Volume A: Cosmology and Gravitation|url=https://books.google.com/books?id=3ZURuKaxdy8C&pg=PA121|date=31 August 2002|publisher=Springer Science & Business Media|isbn=978-0-306-47293-0|pages=121–}}
* {{Cite web |url=https://www.youtube.com/watch?v=mJB0ChQaZms |title=My Life in Science |last=Varun Sahni |date=July 15, 2015 |publisher=Inter-University Centre for Astronomy and Astrophysics |format=YouTube video |access-date=2017-10-19}}
* {{Cite web |url=https://www.youtube.com/watch?v=6pxM4rGNJU4 |title=A play directed by Professor Varun Sahni during the IUCAA Foundation day 2016 |date=March 23, 2017 |publisher=Inter-University Centre for Astronomy and Astrophysics |format=YouTube video |access-date=2017-10-19}}

{{SSBPST recipients in Physical Science}}
{{Authority control}}

{{DEFAULTSORT:Sahni, Varun}}
[[Category:Recipients of the Shanti Swarup Bhatnagar Award in Physical Science]]
[[Category:Indian scientific authors]]
[[Category:1956 births]]
[[Category:Fellows of the Indian Academy of Sciences]]
[[Category:Fellows of the Indian National Science Academy]]
[[Category:Fellows of The National Academy of Sciences, India]]
[[Category:Indian theoretical physicists]]
[[Category:Indian astrophysicists]]
[[Category:Living people]]

Varun Sahni - Revision history

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