Oxygen abundance in nearby galaxies based on the spectra of H II regions from the Sloan Digital Sky Survey II: The interacting galaxies NGC 4631 and NGC 4656

2008 ◽  
Vol 24 (4) ◽  
pp. 192-200 ◽  
Author(s):  
L. S. Pilyugin ◽  
I. Yu. Izotova ◽  
Yu. S. Sholudchenko
Keyword(s):  
Sloan Digital Sky Survey ◽  
Interacting Galaxies ◽  
H Ii Regions ◽  
Oxygen Abundance ◽  
Sky Survey ◽  
Nearby Galaxies

scholarly journals The Oxygen Abundance of Nearby Galaxies from Sloan Digital Sky Survey Spectra

2007 ◽  
Vol 669 (1) ◽  
pp. 299-314 ◽  
Author(s):  
Leonid S. Pilyugin ◽  
Trinh X. Thuan
Keyword(s):  
Sloan Digital Sky Survey ◽  
Oxygen Abundance ◽  
Sky Survey ◽  
Nearby Galaxies

scholarly journals COLOR-MAGNITUDE DISTRIBUTION OF FACE-ON NEARBY GALAXIES IN SLOAN DIGITAL SKY SURVEY DR7

2014 ◽  
Vol 787 (1) ◽  
pp. 63 ◽  
Author(s):  
Shuo-Wen Jin ◽  
Qiusheng Gu ◽  
Song Huang ◽  
Yong Shi ◽  
Long-Long Feng
Keyword(s):  
Sloan Digital Sky Survey ◽  
Magnitude Distribution ◽  
Sky Survey ◽  
Nearby Galaxies

scholarly journals Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe

2017 ◽  
Vol 154 (1) ◽  
pp. 28 ◽  
Author(s):  
Michael R. Blanton ◽  
Matthew A. Bershady ◽  
Bela Abolfathi ◽  
Franco D. Albareti ◽  
Carlos Allende Prieto ◽  
...  
Keyword(s):  
Milky Way ◽  
Sloan Digital Sky Survey ◽  
Sky Survey ◽  
Nearby Galaxies

scholarly journals Chemical abundances of Seyfert 2 AGNs – I. Comparing oxygen abundances from distinct methods using SDSS

2019 ◽  
Vol 492 (1) ◽  
pp. 468-479 ◽  
Author(s):  
O L Dors ◽  
P Freitas-Lemes ◽  
E B Amôres ◽  
E Pérez-Montero ◽  
M V Cardaci ◽  
...  
Keyword(s):  
Sloan Digital Sky Survey ◽  
Strong Line ◽  
Host Galaxies ◽  
Chemical Abundances ◽  
Oxygen Abundance ◽  
Line Intensities ◽  
Sky Survey ◽  
Direct Measurements ◽  
Low Metallicity ◽  
Semi Empirical

ABSTRACT We compare the oxygen abundance (O/H) of the narrow-line regions (NLRs) of Seyfert 2 AGNs obtained through strong-line methods and from direct measurements of the electron temperature (Te-method). The aim of this study is to explore the effects of the use of distinct methods on the range of metallicity and on the mass–metallicity relation of active galactic nuclei (AGNs) at low redshifts (z ≲ 0.4). We used the Sloan Digital Sky Survey (SDSS) and NASA/IPAC Extragalactic Database (NED) to selected optical (3000 < λ(Å) < 7000) emission line intensities of 463 confirmed Seyfert 2 AGNs. The oxygen abundances of the NLRs were estimated using the theoretical Storchi-Bergmann et al. calibrations, the semi-empirical N2O2 calibration, the Bayesian H  ii-Chi-mistry code and the Te-method. We found that the oxygen abundance estimations via the strong-line methods differ from each other up to ∼0.8 dex, with the largest discrepancies in the low-metallicity regime ($\rm 12+\log (O/H) \: \lesssim \: 8.5$). We confirmed that the Te-method underestimates the oxygen abundance in NLRs, producing unreal subsolar values. We did not find any correlation between the stellar mass of the host galaxies and the metallicity of their AGNs. This result is independent of the method used to estimate Z.

scholarly journals Oxygen abundance in the Sloan Digital Sky Survey

2006 ◽  
Vol 453 (2) ◽  
pp. 487-492 ◽  
Author(s):  
F. Shi ◽  
X. Kong ◽  
F. Z. Cheng
Keyword(s):  
Sloan Digital Sky Survey ◽  
Oxygen Abundance ◽  
Sky Survey

scholarly journals Peculiar motions of the gas at the centre of the barred galaxy UGC 4056

2019 ◽  
Vol 628 ◽  
pp. A55 ◽  
Author(s):  
I. A. Zinchenko ◽  
L. S. Pilyugin ◽  
F. Sakhibov ◽  
E. K. Grebel ◽  
A. Just ◽  
...  
Keyword(s):  
Rotation Velocity ◽  
Colour Index ◽  
Sloan Digital Sky Survey ◽  
Galactocentric Distance ◽  
Circular Velocity ◽  
Sky Survey ◽  
The Galaxy ◽  
Nearby Galaxies ◽  
Gas Response ◽  
Gaseous Disc

We derive the circular velocity curves of the gaseous and stellar discs of UGC 4056, a giant barred galaxy with an active galactic nucleus (AGN). We analyse UGC 4056 using the 2D spectroscopy obtained within the framework of the Mapping Nearby Galaxies at APO (MaNGA) survey. Using images and the colour index g − r from the Sloan Digital Sky Survey (SDSS), we determined the tilt of the galaxy, which allows us to conclude that the galaxy rotates clockwise with trailing spiral arms. We found that the gas motion at the central part of the UGC 4056 shows peculiar features. The rotation velocity of the gaseous disc shows a bump within around three kiloparsecs while the rotation velocity of the stellar disc falls smoothly to zero with decreasing galactocentric distance. We demonstrate that the peculiar radial velocities in the central part of the galaxy may be caused by the inflow of the gas towards the nucleus of the galaxy. The unusual motion of the gas takes place at the region with the AGN-like radiation and can be explained by the gas response to the bar potential.

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