H ii Region Population in a Sample of Nearby Galaxies with Nuclear Activity. II. Luminosity Function, Size, and Radial Distributions

1997 ◽  
Vol 108 (1) ◽  
pp. 199-228 ◽  
Author(s):  
Rosa M. Gonzalez Delgado ◽  
Enrique Perez
Keyword(s):  
Luminosity Function ◽  
Nuclear Activity ◽  
Nearby Galaxies ◽  
H Ii Region

H ii Region Population in a Sample of Nearby Galaxies with Nuclear Activity. I. Data and General Results

1997 ◽  
Vol 108 (1) ◽  
pp. 155-198 ◽  
Author(s):  
Rosa M. Gonzalez Delgado ◽  
Enrique Perez ◽  
Clive Tadhunter ◽  
Jose M. Vilchez ◽  
Jose Miguel Rodriguez‐Espinosa
Keyword(s):  
Nuclear Activity ◽  
Nearby Galaxies ◽  
H Ii Region

scholarly journals 11.4. Demographics of nuclear activity in nearby galaxies

1998 ◽  
Vol 184 ◽  
pp. 463-464
Author(s):  
Luis C. Ho ◽  
Alexei V. Filippenko ◽  
Wallace L. W. Sargent
Keyword(s):  
Active Galactic Nuclei ◽  
Luminosity Function ◽  
Galactic Nuclei ◽  
Optical Spectra ◽  
Complete Sample ◽  
High Quality ◽  
Nuclear Activity ◽  
Moderate Resolution ◽  
Nearby Galaxies ◽  
Scientific Results

Between 1984 and 1990 we conducted a survey at Palomar Observatory (Filippenko and Sargent 1985) to quantify the luminosity function of nearby active galactic nuclei (AGNs). The Hale 5 m telescope was used to obtain high-quality, moderate-resolution optical spectra of a nearly statistically complete sample of about 500 bright (BT ≤ 12.5 mag), northern (δ > 0°) galaxies (see Ho et al. 1995 for details). The survey has now been completed, and the first scientific results are reported in a series of papers by Ho et al. (1997a, b, c).

scholarly journals A CENSUS OF X-RAY NUCLEAR ACTIVITY IN NEARBY GALAXIES

2009 ◽  
Vol 699 (1) ◽  
pp. 281-297 ◽  
Author(s):  
Wei Ming Zhang ◽  
Roberto Soria ◽  
Shuang Nan Zhang ◽  
Douglas A. Swartz ◽  
JiFeng Liu
Keyword(s):  
Nuclear Activity ◽  
X Ray ◽  
Nearby Galaxies

scholarly journals What do planetary nebulae and H II regions reveal about the chemical evolution of nearby dwarf galaxies?

2018 ◽  
Vol 14 (S344) ◽  
pp. 161-177 ◽  
Author(s):  
Denise R. Gonçalves
Keyword(s):  
Chemical Evolution ◽  
Local Group ◽  
Planetary Nebulae ◽  
H Ii Regions ◽  
Chemical Abundances ◽  
Local Universe ◽  
Time Line ◽  
Nearby Galaxies ◽  
H Ii Region ◽  
Age Range

AbstractThe Local Group contains a great number of dwarf irregulars and spheroidals, for which the spectroscopy of individual stars can be obtained. Thus, the chemical evolution of these galaxies can be traced, with the only need of finding populations spanning a large age range and such that we can accurately derive the composition. Planetary nebulae (PNe) are old- and intermediate-age star remnants and their chemical abundances can be obtained up to 3-4 Mpc. H ii regions, which are brighter and much easily detected, represent galaxies young content. PNe and H ii regions share similar spectroscopic features and are analysed in the same way. Both are among the best tracers of the chemical evolution allowing to draw the chemical time line of nearby galaxies. The focus in this review are the PN and H ii region populations as constraints to the chemical evolution models and the mass-metallicity relation of the local universe.

scholarly journals H II REGION LUMINOSITY FUNCTION OF THE INTERACTING GALAXY M51

2011 ◽  
Vol 735 (2) ◽  
pp. 75 ◽  
Author(s):  
Jong Hwan Lee ◽  
Narae Hwang ◽  
Myung Gyoon Lee
Keyword(s):  
Luminosity Function ◽  
H Ii Region
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