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Faint companions in the close environment of star-forming dwarf galaxies: possible overlooked starburst triggers?
K. G. Noeske, J. Iglesias-Paramo, J. M. Vilchez +2
Using the NASA Extragalactic Database, we have searched the close environment of 98 star-forming dwarf galaxies (SFDGs) from field- and low density environments for companion galax…
Optical & NIR photometry of the interacting Dwarf Galaxies II Zw 70/II Zw 71
P. Papaderos, K. G. Noeske, L. M. Cairos +2
We obtained deep optical and NIR images of the pair of blue compact dwarf (BCD) galaxies II Zw 70 and II Zw 71 in order to study the effects of interaction on the structural proper…
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…
The N/O abundance ratio in the lowest-metallicity blue compact dwarf galaxies
Y. Izotov, F. Chaffee, C. Foltz +6
The results of the N/O abundance determination in a sample of low-metallicity blue compact dwarf (BCD) galaxies based on new spectroscopic observations with large telescopes (Keck,…
A spectroscopic study of component C and the extended emission around I Zw 18
Y. I. Izotov, F. H. Chaffee, C. B. Foltz +5
Long-slit Keck II, 4m Kitt Peak, and 4.5m MMT spectrophotometric data are used to investigate the stellar population and the evolutionary status of I Zw 18C, the faint C component…
The evolutionary status of the low-metallicity blue compact dwarf galaxy SBS 0940+544
N. G. Guseva, Y. I. Izotov, P. Papaderos +6
We present the results of spectrophotometry and V,R,I, Halpha CCD photometry of the blue compact dwarf (BCD) galaxy SBS 0940+544. Broad-band images taken with the 2.1m KPNO and 1.2…