13 papers
Optical & NIR Surface Photometry of I Zw 18
P. Papaderos, Yu. I. Izotov, K. G. Noeske +2
Using HST and ground-based optical and NIR data, we investigate whether the blue compact dwarf (BCD) galaxy I Zw 18 has an extended low-surface-brightness (LSB) older stellar popul…
FUSE observations of the Blue Compact Dwarf Galaxy Mrk 59
T. X. Thuan, A. Lecavelier des Etangs, Y. I. Izotov
New FUSE far-UV spectroscopy of the nearby metal-deficient (Zsun/8) cometary Blue Compact Dwarf (BCD) galaxy Markarian (Mrk) 59 is discussed. The data are used to investigate eleme…
The gaseous content of the Blue Compact Galaxy Mrk 59
A. Lecavelier des Etangs, T. X. Thuan, Y. I. Izotov
FUSE far-UV spectroscopy of the nearby metal-deficient (Zo/8) cometary Blue Compact Dwarf galaxy Mrk59 have been used to investigate element abundances in its interstellar medium.…
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…