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The Spitzer View of Low-Metallicity Star Formation: I. Haro 3
L. K. Hunt, T. X. Thuan, M. Sauvage +1
We present Spitzer observations of the blue compact dwarf galaxy (BCD) Haro 3, with an oxygen abundance of 12+log(O/H)=8.32. These data are part of a larger study of star formation…
New southern blue compact dwarf galaxies in the 2dF Galaxy Redshift Survey
P. Papaderos, N. G. Guseva, Y. I. Izotov +3
Aiming to find new extremely metal-deficient star-forming galaxies we extracted from the Two-Degree Field Galaxy Redshift Survey (2dFGRS) 100K Data Release 14 emission-line galaxie…
On the relation between electron temperatures in the O+ and O++ zones in high-metallicity HII regions
L. S. Pilyugin, J. M. Vilchez, T. X. Thuan
We suggest a new way to establish the relation between the electron temperature t3 within the [OIII] zone and the electron temperature t2 within the [OII] zone in high-metallicity…
Oxygen abundance variations in the system of the two blue compact dwarf galaxies SBS 0335-052E and SBS 0335-052W
P. Papaderos, Y. I. Izotov, N. G. Guseva +2
We present 3.6m ESO telescope spectroscopic observations of the system of the two blue compact dwarf galaxies SBS 0335-052W and SBS 0335-052E. The oxygen abundance in SBS 0335-052W…
Two extremely metal-poor emission-line galaxies in the Sloan Digital Sky Survey
Y. I. Izotov, P. Papaderos, N. G. Guseva +2
We present spectroscopic observations with the 3.6m ESO telescope of two emission-line galaxies, J2104-0035 and J0113+0052, selected from the Data Release 4 (DR4) of the Sloan Digi…
Balmer and Paschen jump temperature determinations in low-metallicity emission-line galaxies
N. G. Guseva, Y. I. Izotov, T. X. Thuan
We have used the Balmer and Paschen jumps to determine the temperatures of the H+ zones of a total sample of 47 H II regions. The Balmer jump was used on MMT spectrophotometric dat…