Tufts/CfA/MIT Cosmology Seminar, at CfA:

Tuesday, October 17, 1995
2:30 pm, Observatory Classroom A-101

Dr. Dimitar Sasselov
Center for Astrophysics

"Recent Results on the Primordial Helium Abundance 
and Big Bang Nucleosynthesis Consistency"

Abstract: Current estimates of the primordial Helium-4 abundance may
suffer from large systematic uncertainties (in the direction of being
underestimated). Combined with recent results on D and Li, the value of
Omega in baryons from Big Bang Nucleosynthesis (BBN) is reconsidered
and the consistency of BBN examined.  At a less significant level, the
Helium-4 abundance also plays a role in constraining the lower limit on
the age of the Universe (via globular cluster ages).