Nir Shaviv | |
|---|---|
 Nir Shaviv, 2009 | |
| Born | July 6, 1972 |
| Nationality | Israeli American |
| Scientific career | |
| Fields | Astrophysics |
| Institutions | Hebrew University of Jerusalem |
Nir Joseph Shaviv (Hebrew: ניר יוסף שביב, born July 6, 1972) is an Israeli‐American physics professor. He is professor at the Racah Institute of Physics of the Hebrew University of Jerusalem.[1]
He is known for his solar and cosmic-ray hypothesis of climate change which disagrees with the scientific consensus on human-caused climate change. In 2002, Shaviv hypothesised that passages through the Milky Way's spiral arms appear to have been the cause behind the major ice-ages over the past billion years. In his later work, co-authored by Jan Veizer, a low upper limit was placed on the climatic effect of CO2.[2]
His best known contribution to the field of astrophysics was to demonstrate that the Eddington luminosity is not a strict limit,[3] namely, that astrophysical objects can be brighter than the Eddington luminosity without blowing themselves apart. This is achieved through the development of a porous atmosphere that allows the radiation to escape while exerting little force on the gas. The theory was correctly used to explain the mass-loss in Eta Carinae's giant eruption, and the evolution of classical nova eruptions.[4]
- ^ Prof. Nir Joseph Shaviv (personal world wide web site), Recah Institute of Physics, Hebrew University of Jerusalem, retrieved 2007-04-18.
- ^ ————————; Veizer, Jan (2003). "Celestial driver of Phanerozoic climate?" (PDF). Geological Society of America. pp. 4–10. Archived from the original (PDF) on 2011-11-04.
{{cite journal}}: Cite journal requires|journal=(help) - ^ ———————— (September 2000). "Research Summary and Goals" (PDF). CA: U Toronto. Archived from the original (PDF) on 2011-06-09. Retrieved 2008-04-23.
- ^ Shaviv, Nir J. (2001). "The theory of steady-state super-Eddington winds and its application to novae". Monthly Notices of the Royal Astronomical Society. 326 (1): 126–146. arXiv:astro-ph/0008489. Bibcode:2001MNRAS.326..126S. doi:10.1046/j.1365-8711.2001.04574.x. ISSN 0035-8711. S2CID 15076043.