Cosmo-torun November 2010

cosmo-torun@cosmo.torun.pl

1 participants
2 discussions

the Universe is old and old age caught up with Allan Sandage :(
by Boud Roukema 19 Nov '10

19 Nov '10

hi everyone, I think I heard at least one conference talk by Sandage. Some of the more senior people here may have known him better. I'll just quote the Wikipedia summary for the younger people among us: Allan Rex Sandage (born June 18, 1926 in Iowa City, Iowa, died November 13, 2010) was an American astronomer. He was Staff Member Emeritus with the Carnegie Observatories in Pasadena, California. He is best known for determining the first reasonably accurate value for the Hubble constant and the age of the universe. http://en.wikipedia.org/wiki/Allan_Sandage pozdr boud

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a fourth neutrino (sterile neutrino)?
by Boud Roukema 05 Nov '10

05 Nov '10

hi everyone, Even if the electron, tau and muon neutrinos are usually considered to be of too low mass to be relevant for non-baryonic dark matter, it looks like there are several hints that a fourth, "sterile" neutrino exists: http://cosmocoffee.info/viewtopic.php?p=4864 It's not clear to me what this could/would imply for the sterile neutrino's mass... pozdr boud

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Cosmo-torun November 2010