Spectroscopic and photometric studies of low-metallicity star-forming dwarf galaxies. III. SBS 1415+437

@article{Guseva2003SpectroscopicAP,
  title={Spectroscopic and photometric studies of low-metallicity star-forming dwarf galaxies. III. SBS 1415+437},
  author={Natal'ia G. Guseva and Polichronis Papaderos and Yuri I. Izotov and Richard Green and Klaus J. Fricke and Trinh Xuan Thuan and K. J. Noeske Main Astronomical Observatory and Kyiv and Ukraine and Universitaets--Sternwarte and Goettingen and H Germany and National Optical Astronomy Observatory and Tucson and Usa and University of Virginia and Charlottesville},
  journal={arXiv: Astrophysics},
  year={2003}
}
We present a detailed optical spectroscopic and B,V,I,Halpha photometric study of the metal-deficient cometary blue compact dwarf (BCD) galaxy SBS 1415+437. We derive an oxygen abundance 12+log(O/H)=7.61+/-0.01 and 7.62+/-0.03 (Z =Zsun/20) in the two brightest H II regions, among the lowest in BCDs. The helium mass fractions in these regions are Y=0.246+/-0.003 and 0.243+/-0.010. Four techniques based on the equivalent widths of the hydrogen emission and absorption lines, the spectral energy… 
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Spectroscopic and photometric studies of low-metallicity star-forming dwarf galaxies - III. SBS 1415+437
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