Results 1 to 10 of about 4,406,721 (399)

CHEMICAL ABUNDANCES IN CLUSTERS OF GALAXIES [PDF]

, 1995
We study the origin of iron and alpha-elements (O, Mg, Si) in clusters of galaxies. In particular, we discuss the [O/Fe] ratio and the iron mass-to-luminosity ratio in the intracluster medium (ICM) and their link to the chemical and dynamical evolution ...
F. Matteuccí, B. K. Gibson
core   +6 more sources

Chemical abundances and kinematics of barium stars [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
In this paper we present an homogeneous analysis of photospheric abundances based on high-resolution spectroscopy of a sample of 182 barium stars and candidates.
Chavero, C., de Castro, D. B., Drake, N. A., Jilinski, E., Pereira, C. B., Roig, F., Silva, J. V. Sales   +6 more
core   +7 more sources

Chemical abundances in active galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
The Sloan Digital Sky Survey (SDSS) has proved to be a powerful resource for understanding the physical properties and chemical composition of star-forming galaxies in the local universe.
S. Flury, E. Moran
semanticscholar   +4 more sources

Chemical Abundances from the Continuum [PDF]

Physica Scripta, 2008
The calculation of solar absolute fluxes in the near-UV is revisited, discussing in some detail recent updates in theoretical calculations of bound-free opacity from metals.
Allende Prieto C, Allende Prieto C, Allende Prieto C, Asplund M, Bautista M A, C Allende Prieto, Cunto W, Hubeny I Lanz T, Koesterke L, Nahar S N, Sbordone L   +10 more
core   +4 more sources

Systematic investigation of chemical abundances derived using IR spectra obtained with GIANO [PDF]

A&A 622, A68 (2019), 2018
Detailed chemical abundances of Galactic stars are needed in order to improve our knowledge of the formation and evolution of our galaxy, the Milky Way. We took advantage of the GIANO archive spectra to select a sample of Galactic disc stars in order to derive their chemical inventory and to compare the abundances we derived from these infrared spectra
E. Caffau, P. Bonifacio, E. Oliva, S. Korotin, L. Capitanio, S. Andrievsky, S. Andrievsky, R. Collet, L. Sbordone, S. Duffau, N. Sanna, A. Tozzi, L. Origlia, N. Ryde, H. Ludwig   +14 more
arxiv   +3 more sources

Chemical Evolution of CNO abundances [PDF]

arXiv, 2003
New low and intermediate star yields calculated by Buell (1997) are evaluated by using them in a Galactic Chemical Evolution model.
Mercedes Mollá, M. Gavilán
arxiv   +5 more sources

Chemical Abundances in Planetary Nebulae [PDF]

Symposium - International Astronomical Union, 1978
PN can be divided into four types depending on their chemical composition. In order of decreasing heavy element abundances the types are: I) He and N rich, II) intermediate population, III) high velocity, and IV) halo population. The type II PN are overabundant in N and C relative to the Orion Nebula.
M. Peimbert
openalex   +3 more sources

Evolution of chemical abundances in Seyfert galaxies [PDF]

Astronomy & Astrophysics, 2007
We computed the chemical evolution of spiral bulges hosting Seyfert nuclei, based on updated chemical and spectro-photometrical evolution models for the bulge of our Galaxy, made predictions about other quantities measured in Seyferts, and modeled the ...
Adams, Angeletti, Arimoto, Balcells, Baldwin, Ballero, Ballero, Ballero, Barth, Bentz, Bertin, Blain, Bondi, Brandt, Calura, Calura, Calura, Calura, Chiappini, Chiappini, Cimatti, Cioffi, Ciotti, Ciotti, Ciotti, Collin, Cox, Cox, D'Odorico, Di Matteo, Dietrich, Dietrich, Dunlop, Dwek, F. Calura, F. Matteucci, Fabian, Ferrarese, Ferrarese, Fields, Fields, Ford, François, Fraquelli, Freudling, Friaça, Fulbright, Fulbright, Galaz, Gebhardt, Gebhardt, Genzel, González Delgado, Granato, Groenewegen, Gu, Haiman, Hamann, Hamann, Hamann, Hernquist, Ho, Ho, Häring, Itoh, Iwamuro, Iwamuro, Jiang, Jimenez, Jimenez, Kaspi, Komossa, Kormendy, Kurucz, L. Ciotti, Laor, Launhardt, Lecureur, Lee, MacKenty, Magorrian, Maiolino, Maiolino, Marconi, Markowitz, Mathur, Matteucci, Matteucci, Matteucci, Matteucci, Matteucci, Matteucci, McLure, Monaco, Nagao, Nagao, Narayan, Nelson, Nomoto, Onken, Origlia, Origlia, Origlia, Ostriker, P. Padovani, Padovani, Peletier, Peletier, Petitjean, Pipino, Rich, Rodríguez-Ardila, Romano, S. K. Ballero, Salpeter, Sazonov, Scannapieco, Schmitt, Shields, Storchi-Bergmann, Storchi-Bergmann, Storchi-Bergmann, Storchi-Bergmann, Thomas, Thomas, Thompson, Tinsley, Tremaine, Turner, Ulrich, Van Loon, Verner, Wandel, Wandel, Wang, Warner, Wills, Wu, Yee, Yu, Zoccali, Zoccali   +141 more
core   +7 more sources

Radial molecular abundances and gas cooling in starless cores [PDF]

, 2012
Aims: We aim to simulate radial profiles of molecular abundances and the gas temperature in cold and heavily shielded starless cores by combining chemical and radiative transfer models. Methods: A determination of the dust temperature in a modified Bonnor-Ebert sphere is used to calculate initial radial molecular abundance profiles.
Aikawa, Andersson, Bergeron, Bergin, Bonnor, Broderick, Caselli, Cazaux, Du, Flower, Fontani, Galli, Garrod, Garrod, Garrod, Geppert, Goldsmith, Goldsmith, Goldsmith, Goumans, Hasegawa, Hasegawa, Hily-Blant, Hollenbach, Hotzel, Juvela, Juvela, Jørgensen, Katz, Keto, Keto, Keto, Lee, Liseau, O. Sipilä, Ossenkopf, Padovani, Pagani, Schöier, Semenov, Sipilä, Sipilä, Tafalla, Taquet, Willacy, Wilson, Young   +46 more
arxiv   +3 more sources

Chemical abundances in the damped Lyα systems [PDF]

SPIE Proceedings, 2000
14 pages, 7 figures; a refereed review paper to appear in Carnegie Observatories Astrophysics Series, Vol. 4: Origin and Evolution of the Elements, ed. A. McWilliam & M. Rauch (Cambridge: Cambridge Univ. Press)
J. X. Prochaska
openalex   +5 more sources