Results 1 to 10 of about 7,480,219 (297)

Modelling the chemical evolution [PDF]

Proceedings of the International Astronomical Union, 2010
Advanced observational facilities allow to trace back the chemical evolution of the Universe, on the one hand, from local objects of different ages and, secondly, by direct observations of redshifted objects. The chemical enrichment serves as one of the cornerstones of cosmological evolution.
Argast, Cescutti, Chiappini, Colavitti, Gerhard Hensler, Harfst, Hensler, Hensler, Hensler, Hensler, Hirschi, Ikuta, Koch, Koeppen, Koeppen, Kroeger, Maciel, Maeder, Matteucci, Meynet, Meynet, Meynet, Momany, Nordstroem, Pagel, Pagel, Portinari, Portinari, Prantzos, Prantzos, Recchi, Recchi, Recchi, Recchi, Revaz, Samland, Schaller, Simone Recchi, Spitoni, Theis, Tinsley   +40 more
arxiv   +8 more sources

Cosmic Chemical Evolution [PDF]

The Astrophysical Journal, 1999
Numerical simulations of standard cosmological scenarios have now reached the degree of sophistication required to provide tentative answers to the fundamental question: Where and when were the heavy elements formed? Averaging globally, these simulations
Dave R., Jeremiah P. Ostriker, Renyue Cen, Tamura T., Tripp T. M.   +4 more
core   +7 more sources

Chemical Evolution of Natural Product Structure. [PDF]

J Am Chem Soc, 2022
Natural products are the result of Nature’s exploration of biologically relevant chemical space through evolution and an invaluable source of bioactive small molecules for chemical biology and medicinal chemistry.
Grigalunas M, Brakmann S, Waldmann H.
europepmc   +2 more sources

Pseudo Natural Products-Chemical Evolution of Natural Product Structure. [PDF]

Angew Chem Int Ed Engl, 2021
Pseudo‐natural products (PNPs) combine natural product (NP) fragments in novel arrangements not accessible by current biosynthesis pathways. As such they can be regarded as non‐biogenic fusions of NP‐derived fragments.
Karageorgis G, Foley DJ, Laraia L, Brakmann S, Waldmann H.   +4 more
europepmc   +2 more sources

Chemical Evolution of Galaxies [PDF]

Publications of the Astronomical Society of the Pacific, 2000
Chemical evolution of galaxies brings together ideas on stellar evolution and nucleosynthesis with theories of galaxy formation, star formation and galaxy evolution, with all their associated uncertainties.
Arimoto N., Arnaud M., B. E. J. Pagel, Beers T. C., Edvardsson B., Fuhrmann K., Gasson R. E. M., Gratton R., Gustafsson B., Hoyle F., Larson R. B., Madau P., Maeder A., Marigo P., Matteucci F., Nissen P. E., Pagel B. E. J., Pagel B. E. J., Renzini A., Scalo J., Thielemann F.-K., White S. D. M.   +21 more
core   +8 more sources

Chemical Evolution in VeLLOs [PDF]

Journal of The Korean Astronomical Society, 2007
A new type of object called "Very Low Luminosity Objects (VeLLOs)" has been discovered by the Spitzer Space Telescope. VeLLOs might be substellar objects forming by accretion.
Lee, Jeong-Eun
core   +5 more sources

The Chemical Evolution of Phosphorus [PDF]

The Astrophysical Journal, 2014
Phosphorus is one of the few remaining light elements for which little is known about its nucleosynthetic origin and chemical evolution, given the lack of optical absorption lines in the spectra of long-lived FGK-type stars.
Cescutti, Gabriele, Frebel, Anna, Jacobson, Heather R., Matteucci, Francesca, Roederer, Ian U., Thanathibodee, Thanawuth   +5 more
core   +6 more sources

The chemical evolution of the Milky Way [PDF]

Proceedings of Frontier Research in Astrophysics – II — PoS(FRAPWS2016), 2017
We will discuss some highlights concerning the chemical evolution of our Galaxy, the Milky Way. First we will describe the main ingredients necessary to build a model for the chemical evolution of the Milky Way. Then we will illustrate some Milky Way models which includes detailed stellar nucleosynthesis and compute the evolution of a large number of ...
Donatella Romano, E. Spitoni, Alvaro Rojas Arriagada, Francesca Matteucci   +3 more
arxiv   +7 more sources

Autocatalytic Sets Arising in a Combinatorial Model of Chemical Evolution [PDF]

Life, 2022
The idea that chemical evolution led to the origin of life is not new, but still leaves open the question of how exactly it could have led to a coherent and self-reproducing collective of molecules.
Wim Hordijk, Mike Steel, Stuart Kauffman
doaj   +2 more sources

Chemical Evolution of Bulges [PDF]

Astrophys.Space Sci. 277 (2001) 205-205, 2001
We show our results from the application of the Multiphase chemical evolution model to a set of Bulges of spiral ...
Mercedes Mollá, Federico Ferrini
arxiv   +4 more sources