TY - JOUR
T1 - Diffuse ionized gas in the dwarf irregular galaxy DDO 53
AU - Hidalgo-Gámez, A. M.
PY - 2007
Y1 - 2007
N2 - The spectral characteristics throughout the dwarf irregular galaxy DDO 53 are studied. The results are very similar to those for other irregular galaxies: high excitation and low values of the [S II]/Hα ratio. The most likely ionization source is photon leakage from the classical H II regions, without any other source, although the interstellar medium of the galaxy is quite perturbed. Moreover, the physical conditions throughout the galaxy do not change very much because both the photon leakage percentage and the ionization temperature are very similar. In addition, the determined metal content for two H II regions indicates that DDO 53 is a low-metallicity galaxy.
AB - The spectral characteristics throughout the dwarf irregular galaxy DDO 53 are studied. The results are very similar to those for other irregular galaxies: high excitation and low values of the [S II]/Hα ratio. The most likely ionization source is photon leakage from the classical H II regions, without any other source, although the interstellar medium of the galaxy is quite perturbed. Moreover, the physical conditions throughout the galaxy do not change very much because both the photon leakage percentage and the ionization temperature are very similar. In addition, the determined metal content for two H II regions indicates that DDO 53 is a low-metallicity galaxy.
KW - Galaxies: individual (DDO 53)
KW - Galaxies: irregular
KW - Galaxies: stellar content
KW - H II regions
UR - http://www.scopus.com/inward/record.url?scp=35348903128&partnerID=8YFLogxK
U2 - 10.1086/521392
DO - 10.1086/521392
M3 - Artículo
SN - 0004-6256
VL - 134
SP - 1447
EP - 1458
JO - Astronomical Journal
JF - Astronomical Journal
IS - 4
ER -