Results 61 to 70 of about 58,855 (236)

Dissipative N - body code for galaxy evolution

, 2000
The evolving galaxy is considered as a system of baryonic fragments embedded into the static dark nonbaryonic (DH) and baryonic (BH) halo and subjected to gravitational and viscous interactions.
Douphole B., Kuijken K., P. Berczik, Pagel B. E. J., Raiteri C. M., S. G. Kravchuk, Samland M., Steinmetz M.   +7 more
core   +1 more source

Mapping Multiphase Metals in Star-forming Galaxies: A Spatially Resolved UV+Optical Study of NGC 5253

The Astrophysical Journal
We present a pioneering, spatially resolved, multiphase gas abundance study on the blue compact dwarf galaxy NGC 5253, targeting 10 star-forming (SF) clusters inside six far-UV (FUV) Hubble Space Telescope/Cosmic Origins Spectrograph (COS) pointings with
Valentina Abril-Melgarejo, Bethan L. James, Alessandra Aloisi, Matilde Mingozzi, Vianney Lebouteiller, Svea Hernandez, Nimisha Kumari, AAS Journals Data Editors   +7 more
doaj   +1 more source

Heavy Element Nucleosynthesis

EPJ Web of Conferences, 2018
This contribution deals with the important subject of the nucleosynthesis of heavy elements in the Galaxy. After an overview of several observational features, the physical processes responsible mainly for the formation of heavy elements will be ...
El Eid Mounib F.
doaj   +1 more source

Chemical Evolution of Zinc in the Galaxy [PDF]

Publications of the Astronomical Society of Japan, 2009
Abstract The local thermodynamic equilibrium (LTE) abundances of zinc (Zn) of our sample of 35 metal-poor stars were explored in the range of $-$3.0 $<$ [Fe$/$H] $<$ 0.0. Based on a combination of our Zn abundances and those obtained in the literature, the behavior of Zn was investigated in the range of $-$4.2 $&lt ...
Yu-ji Saito, Masahide Takada-Hidai, Yoichi Takeda, Satoshi Honda   +3 more
openaire   +2 more sources

The Chemical Evolution of the Milky Way

, 1999
The field of chemical evolution modeling of the Galaxy is experiencing in the last years a phase of high activity and important achievements. There are, however, several open questions which still need to be answered. In this review I summarize what have
A Pasquali, A Renzini, AA Penzias, AI Boothroyd, B Barbuy, B Edvardsson, C Chiappini, CG Lacey, E Anders, F Matteucci, Forestini, JM Scalo, LB van den Hoek, M Tosi, M Tosi, M Tosi, M Tosi, N Prantzos, P Kroupa, PA Shaver, R Wielen, Rocha, S Boissier, S Smartt, SE Woosley, T.C. Beers, WJ Maciel, WJ Maciel   +27 more
core   +1 more source

Planetary nebulae in the inner Milky Way: new abundances [PDF]

, 2009
The study of planetary nebulae in the inner-disk and bulge gives important information on the chemical abundances of elements such as He, N, O, Ar, Ne, and on the evolution of these abundances, which is associated with the evolution of intermediate-mass ...
Cavichia, O., Costa, R. D. D., Maciel, W. J.   +2 more
core   +2 more sources

Dynamical and chemical evolution of NGC1569

, 2005
Blue Compact Dwarf and Dwarf Irregular galaxies are generally believed to be unevolved objects, due to their blue colors, compact appearance and large gas fractions.
Aguirre, Aloisi, Aloisi, Alvensleben, Anders, Angeretti, Aparicio, Arnone, Arp, Babul, Blitz, Bradamante, Böhringer, Centurión, Chiappini, Chiappini, Chiappini, Ciotti, D'Ercole, de Heij, de Marchi, Dyson, Ellis, F. Matteucci, Fagotto, Finoguenov, G. Hensler, Gallagher, Gastaldello, Gibson, Greggio, Heckman, Henry, Herwig, Israel, Izotov, Izotov, Izotov, Kennicutt, Kobulnicky, Kobulnicky, Kunth, Köppen, L. Angeretti, Lilly, Loewenstein, Marcolini, Marconi, Marconi, Martin, Martin, Masegosa, Matsushita, Matteucci, Matteucci, Meynet, Momany, Mori, Mori, Mühle, Mühle, Olofsson, Origlia, Ostriker, Ott, Pagel, Pilyugin, Pipino, Pipino, Reakes, Recchi, Recchi, Recchi, Renzini, Renzini, Roediger, Romano, Ruiz-Lapuente, S. Recchi, Searle, Skillman, Spite, Sternberg, Stil, Stil, Tinsley, Tosi, Tozzi, Vallenari, van den Hoek, van Zee, Vílchez, Weidner, Woosley, Östlin   +94 more
core   +1 more source

Chemical behavior of the Dwarf Irregular Galaxy NGC 6822. Its PN and HII region abundances

, 2009
We aim to derive the chemical behavior of a significant sample of PNe and HII regions in the irregular galaxy NGC 6822 The selected objects are distributed in different zones of the galaxy.
Allen, Bauman, Brandenburg, Carigi, Carigi, Carigi, Costa, de Blok, de Blok, Demers, Dufour, Fisher, Franco, Gieren, Grevesse, Henry, Henry, Hernández-Martínez, Herwig, Hidalgo-Gámez, Hirschi, Hirschi, Hodge, J. García-Rojas, Karakas, Killen, Kingdon, Kingsburgh, Kniazev, Kroupa, L. Carigi, L. Hernández-Martínez, Lee, Leisy, Leisy, Leisy, M. Peña, Magrini, Magrini, Marigo, Massey, Mateo, Meynet, Nomoto, Peimbert, Peimbert, Peña, Porter, Richer, Richer, Seaton, Shaw, Stasinska, Storey, Venn, Wang, Woosley   +56 more
core   +1 more source

Spatial Variations of Stellar Elemental Abundances in FIRE Simulations of Milky Way-mass Galaxies: Patterns Today Mostly Reflect Those at Formation

The Astrophysical Journal
Spatial patterns of stellar elemental abundances encode rich information about a galaxy’s formation history. We analyze the radial, vertical, and azimuthal variations of metals in stars, both today and at formation, in the FIRE-2 cosmological simulations
Russell L. Graf, Andrew Wetzel, Matthew A. Bellardini, Jeremy Bailin   +3 more
doaj   +1 more source

The IMF of Extremely Metal-Poor Stars and the Probe into the Star-Formation Process of the Milky Way

, 2007
We discuss the star formation history of the Galaxy, based on the observations of extremely metal-poor stars (EMP) in the Galactic halo, to gain an insight into the evolution and structure formation in the early universe.
Fujimoto, Masayuki Y., Habe, Asao, Komiya, Yutaka, Suda, Takuma   +3 more
core   +1 more source