Results 1 to 10 of about 201,770 (234)

Oxygen abundance maps of CALIFA galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
We construct maps of the oxygen abundance distribution across the disks of 88 galaxies using CALIFA data release 2 (DR2) spectra. The position of the center of a galaxy (coordinates on the plate) were also taken from the CALIFA DR2. The galaxy inclination, the position angle of the major axis, and the optical radius were determined from the analysis of
José M. Vílchez, Eva K. Grebel, Igor Zinchenko, Igor Zinchenko, Sebastián F. Sánchez, L. S. Pilyugin, L. S. Pilyugin, L. S. Pilyugin   +7 more
arxiv   +8 more sources

Intermediate Element Abundances in Galaxy Clusters [PDF]

The Astrophysical Journal, 2003
We present the average abundances of the intermediate elements obtained by performing a stacked analysis of all the galaxy clusters in the archive of the X-ray telescope ASCA.
Arnaud M., Cappellaro E., D. J. Horner, Fukazawa Y., Gibson B. K., Grevesse N., Grevesse N., Guainazzi M., Ishimaru Y., M. Loewenstein, Matsumoto H., Mitchell R. J., Peimbert M., R. F. Mushotzky, Tanaka Y., W. H. Baumgartner   +15 more
core   +4 more sources

The oxygen abundance deficiency in irregular galaxies [PDF]

New Astronomy Reviews, 2000
The observed oxygen abundances in a number of irregular galaxies have been compared with predictions of the closed-box model of chemical and photometric evolution of galaxies. Oxygen is found to be deficient with respect to the predicted abundances. This
Ferrini, F., Pilyugin, L. S.
core   +6 more sources

CHEMICAL ABUNDANCES IN CLUSTERS OF GALAXIES

, 1995
25 pages of uuencoded compressed PostScript. 4 PostScript figures and 4 PostScript tables available from http://www-astro.physics.ox.ac.uk/~bkg/gibson.html Accepted for publication in Astronomy & Astrophysics.
F. Matteuccí, B. K. Gibson
openalex   +5 more sources

Breaks in surface brightness profiles and radial abundance gradients in the discs of spiral galaxies [PDF]

A&A 608, A127 (2017), 2017
We examine the relation between breaks in the surface brightness profiles and radial abundance gradients within the optical radius in the discs of 134 spiral galaxies from the CALIFA survey. The distribution of the radial abundance (in logarithmic scale) in each galaxy was fitted by simple and broken linear relations. The surface brightness profile was
Grebel, E. K, Nefedyev, Y. A., Pilyugin, L. S., Vilchez, J. M., Zinchenko, I. A.   +4 more
arxiv   +3 more sources

Oxygen abundance distributions in six late-type galaxies based on SALT spectra of HII regions [PDF]

, 2015
Spectra of 34 H II regions in the late-type galaxies NGC1087, NGC2967, NGC3023, NGC4030, NGC4123, and NGC4517A were observed with the South African Large Telescope (SALT). In all 34 H II regions, oxygen abundances were determined through the "counterpart" method (C method).
Grebel, E. K., Kniazev, A. Y., Pilyugin, L. S., Zinchenko, I. A.   +3 more
arxiv   +3 more sources

Analysis of the Internal Radial Gradient of Chemical Abundances in Spiral Galaxies from CALIFA [PDF]

The Astrophysical Journal
The study of chemical evolution is of paramount importance for understanding the evolution of galaxies. Models and observations propose an inside-out mechanism in the formation of spiral galaxy disks, implying a negative radial gradient of elemental ...
A. F. S. Cardoso, O. Cavichia, M. Mollá, L. Sánchez-Menguiano   +3 more
doaj   +2 more sources

Oxygen abundances in dwarf irregular galaxies and the metallicity - luminosity relationship [PDF]

, 2001
The low-luminosity dwarf irregular galaxies are considered. The oxygen abundances in HII regions of dwarf irregular galaxies were recalculated from published spectra through the recently suggested P - method. It has been found that the metallicity of low-
L. S. Pilyugin
openalex   +4 more sources

He abundances in disc galaxies. I. Predictions from cosmological chemodynamical simulations [PDF]

Astronomy & Astrophysics, 2019
Accepted for publication in A&AWe investigate how the stellar and gas-phase He abundances evolve as a function of time within simulated star-forming disc galaxies with different star formation histories.
Kobayashi, Chiaki, Mackereth, J. Ted, Miglio, Andrea, Montalban, Josefina, Vincenzo, Fiorenzo   +4 more
core   +5 more sources

STELLAR OBJECTS OF EXTRAGALACTIC ORIGIN IN THE GALACTIC HALO

Odessa Astronomical Publications, 2007
We identified globular clusters and field stars of extragalactic origin and investigated their chemical, physical, and kinematical properties. This objects as supposed was captured by the Galaxy at different times from debris of the dwarf satellite ...
V. A. Marsakov, T. V. Borkova
doaj   +3 more sources