I.F.T.
Almuerzo-Seminario
(Lunch seminar)
Jun 20th 2000, 15:00 p.m.
Dark Matter
Juan M. Usón
(US-NRAO and U. Zaragoza)
Many searches for dark matter have been conducted over the past
thirty years; all of them have been unsuccessful.
Microlensing is used to probe the Halo of the Galaxy towards the
Magellanic Clouds; but most of the lenses are likely to be located
at the Clouds themselves.
In addition, the (controversial) detection of a Neutralino by the
DAMA collaboration has been rejected by recent results from the
CDMS experiment.
It is likely that most of the baryons in the Universe are still
ionized so that it is possible that there is no baryonic dark matter.
Although it is likely that the dark matter in the Milky Way is in a
halo of non-baryonic dark matter, it is possible that a significant
fraction (most?) might be in a tenuous halo of diffuse ionized gas
with a temperature of about one million degrees.
Where: Modulo C-XVI, 3rd floor,
Facultad de Ciencias U.A.M., C.U. Cantoblanco, 28049-Madrid
For more information about seminars at the I.F.T. e-mail
José Ramón Espinosa
or phone +34-91-397 4418.
Last modified: Tue Jun 13 12:14:59 CEST 2000