Bulg. J. Phys. vol.27 no.S1 (2000), pp. 062-065
Narrow-Band Imaging of the Wind-Blown Bubbles NGC 2359 and NGC 7635
B. Efremova1, V. Golev1, T. Bonev2
1Astronomy Department, Sofia University
2Institute of Astronomy, Bulgarian Academy of Sciences
go back1Astronomy Department, Sofia University
2Institute of Astronomy, Bulgarian Academy of Sciences
Abstract. We present a narrow-band imaging of the wind-blown bubbles NGC 2359 and NGC 7635. More than 50 images where obtained in the interference filters centered near the following emission lines: [O III] λ 5007; [O I] λ 6300; Hα λ 6563; He I λ 6678; [S II] λ λ 6716, 6731; [S III] λ 3722 ÷ [O II] λ λ 3726, 3729; [S II] λ λ 4069, 4076. The obtained images are flux-calibrated and the ratios of certain emission lines are made to obtain the maps of ionization structure, electron temperature and electron density of the nebulae.