| 词条 | Sjur Refsdal |
| 释义 |
Sjur Refsdal (30 December 1935 – 29 January 2009) was a Norwegian astrophysicist, born in Oslo. He is best known for his pioneer work on gravitational lensing, including the Chang-Refsdal lens. BiographyIn 1970 he earned a doctorate at the Institute of Theoretical Astrophysics, University of Oslo. Later that year he became professor in astrophysics at the Hamburg Observatory[1] in Germany, and remained in that position until he retired in 2001. In 1964 and 1966 he published a series of articles on the effects and possible applications of gravitational lenses.[2] He is particularly known for the "Refsdal Method", which describes how one may estimate the expansion rate of the Universe (Hubble constant) using the measured time-delay and lens properties of a gravitationally lensed quasar (QSO).[3] He later started work on stellar evolution, but returned to gravitational lensing shortly before the first detection of a gravitational lens, dubbed the Twin Quasar. He was a member of the Norwegian Academy of Science and Emeritus at the Institute for theoretical Astrophysics at the University of Oslo.[4] On 1 February 2005 he was awarded the King's Medal of Merit in gold. The first detected multiply-lensed supernova was nicknamed "SN Refsdal" in his honor.[5][6] References1. ^Obituary, Hamburg Observatory {{s-start}}{{s-ach|aw}}{{succession box|before=Olav Smidsrød|after=Knut Aukland|years=20012. ^[https://books.google.com/books?id=sPAIgy9QGBsC P. Schneider, J. Ehlers, E.E. Falco, Gravitational Lenses], Springer-Verlag, Berlin 1999. Chapter The period 1963-1979 at Google Books 3. ^{{cite journal|title=On the possibility of determining Hubble's parameter and the masses of galaxies from the gravitational lens effect|author=Sjur Refsdal|journal=MNRAS|year=1964|issue=4|volume=128|pages=307–310|doi=10.1093/mnras/128.4.307|bibcode = 1964MNRAS.128..307R }} 4. ^Obituary {{webarchive|url=https://web.archive.org/web/20090303183507/http://www.astro.uio.no/ita/nyheter/refsdal_0209/ |date=2009-03-03 }}, Institutt for Teoretisk Astrofysikk, 2. February 2009 5. ^[https://arxiv.org/abs/1411.6009 Kelly et al., "Multiple Images of a Highly Magnified Supernova Formed by an Early-Type Cluster Galaxy Lens", arXiv:1411.6009]. 6. ^{{cite news |last=Overbye |first=Dennis |authorlink=Dennis Overbye |title=Astronomers Observe Supernova and Find They’re Watching Reruns |url=https://www.nytimes.com/2015/03/06/science/astronomers-observe-supernova-and-find-theyre-watching-reruns.html |date=March 5, 2015 |work=New York Times |accessdate=March 5, 2015 }} (with Jon Storm-Mathisen)|title=Recipient of the Fridtjof Nansen Excellent Research Award in Science}}{{s-end}}{{Authority control}}{{DEFAULTSORT:Refsdal, Sjur}} 10 : 1935 births|2009 deaths|People from Oslo|Norwegian astronomers|20th-century astronomers|21st-century astronomers|University of Oslo alumni|Norwegian expatriates in Germany|Recipients of the King's Medal of Merit in gold|Members of the Norwegian Academy of Science and Letters |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。