4 papers · 1 filter
Big Bang nucleosynthesis and the baryonic content of the universe
T. X. Thuan, Y. I. Izotov
A review of the latest measurements of the primordial abundances of the light nuclei D, 3He, 4He and 7Li is given. We discuss in particular the primordial abundance Yp of 4He as me…
The near-infrared view of SBS 0335-052
L. Vanzi, L. H. Hunt, T. X. Thuan +1
We present near-infrared (NIR) spectra, deep J, H and K low-resolution ima ges, and high-resolution images in J and Ks of the low-metallicity blue dwarf gal axy SBS 0335-052. These…
Massive star populations and the IMF in metal-rich starbursts
Daniel Schaerer, Natalia G. Guseva, Yuri I. Izotov +1
We present new spectroscopic observations of Mkn 309, a starburst galaxy with one of the largest WR populations known. A highly super solar metallicity is derived. Using additional…
Blue compact galaxies and the primordial 4Helium abundance
Trinh Xuan Thuan, Yuri I. Izotov
Blue compact galaxies (BCG) are ideal objects in which to derive the primordial 4He abundance because they are chemically young and have not had a significant stellar He contributi…