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Line 1: {{Short description \| Indian theoretical physicist (born 1956)}} {{use dmy dates\|date=February 2024}} {{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~~ nationality = [[~~Pune~~India\|Indian]]~~, [[Maharashtra]], India~~ ~~\| nationality = [[Indian nationality\|Indian]]~~ \| fields = {{ublist \| [[Astrophysics]] \| [[Astronomy]] }} \| workplaces = {{ublist \| [[Inter-University Centre for Astronomy and Astrophysics]] }} \| ~~alma_mater~~education = [[Moscow State University]] (PhD) \| doctoral_advisor = [[Alexei Starobinsky]] \| doctoral_students = \| father = [[Bhisham Sahni]] ~~\| uncle = [[Balraj Sahni]]~~ \| known_for = Studies on Dark Energy, large-scale structure of the Universe \| awards = {{ublist\| ~~2000 ~~[[Shanti Swarup Bhatnagar Prize]] (2000)\| ~~2014 ~~Homi Bhabha Medal (2014)}} }} '''Varun Bhisham Sahni''' (born ~~March~~ 29, March 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> Line 33: === 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~~2005LNP...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 }} Line 59: {{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~~the National Academy of Sciences, India]] [[Category:Indian theoretical physicists]] [[Category:Indian astrophysicists]]