Joint AAO/ATNF Colloquium.
Thursday, 22nd March - 3:30pm ATNF Lecture Theatre
Seeing Red: The 2 Micron All-Sky Survey and the Nearby Universe
John Huchra Harvard - Smithsonian Center for Astrophysics
The 2 Micron All Sky Survey (2MASS) was initiated
over a decade ago to produce an all sky photometric map in
three colors in the near infrared. The primary goals of the survey
are the study of large scale structure, both in the Milky Way
itself and in the nearby universe. The survey scans are now
complete and we have begun obtaining redshifts of the bright
2 micron selcted galaxies. The near IR is essentially the best
place to select samples to survey the distribution of baryons in the
universe. Combined with independent distance estimates to determine
the peculiar velocity field of galaxies, which can also be obtained
from the 2MASS survey, we shouldbe able to determine both the absolute
amount of dark matter nearby and any difference in the distribution
of dark matter and normal baryonic matter, if such exists. Preliminary
results on the galaxy luminosity function, nearby structures and
IR galaxy properties will be described, as well as our plans for
completing the large scale redshift and distance surveys.
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