Page 1 of 9 1.
Chen. Xuelei (陈学雷)
National Astronomical Observatories
Chinese Academy of Sciences
A20 Datun Road, Chaoyang
Beijing 100012
P.R.China
Email: xuelei@bao.ac.cn
Fax:86-10-64850103
Title of talk: Constrain the dark matter
property with cosmic ionization history
Abstract: The cosmic ionization history
provides a useful tool to constrain the decay and annihilations of dark matter
particles. Even a small fraction of dark matter particles decayed or
annihilated during the cosmic dark age can provide
sufficient energy to affect the ionization state of the baryonic gas. The
ionization history of the Universe can be probed by CMB observations. Using
current CMB data, we obtain constraint on the decay and annihilation rate of
dark matter particles.
2. Chu, Yao-Quan (褚耀泉)
Center for Astrophysics
University of Science and Technology of China
96 Jinzai Lu
Hefei, Anhui 230026
P.R.China
Email: yqchu@ustc.edu.cn
Fax: 86-551-3631760
Title of talk: The Scientific Prospect and
Project Progress of the LAMOST
Abstract: focal length of 20-meter and a
field of view of 5-degree. Using active optics technique to control its
reflecting corrector makes LAMOST a unique astronomical instrument in combining
a large aperture with a wide field of view. The available large focal plane of
1.75-meter in diameter may accommodate up to 4000 fibers, by which the
collected light of distant and faint celestial objects is fed into the
spectrographs, promising a very high spectrum acquiring rate of several
ten-thousands of spectra per night. The telescope will be located at the Xinglong Station of Beijing Astronomical Observatory,
Chinese Academy of Sciences, as a national facility open to the whole
astronomical community. The spectroscopic survey carried out by LAMOST of tens
of millions of galaxies and others will make substantial contribution to the
study of extra-galactic astrophysics and cosmology, such as galaxies, quasars
and the large-scale structure of the universe. Its spectroscopic survey of
large number of stars will make substantial contribution to the study of
stellar astrophysics and the structure and evolution of The Galaxy. Its
spectroscopic survey combining with the surveys in other wavebands, such as
radio, infrared, X-ray and -ray will make substantial contribution to the
cross-identification of multi-waveband of celestial objects.
|