Results 111 to 120 of about 948,048 (332)
Analysis of the Internal Radial Gradient of Chemical Abundances in Spiral Galaxies from CALIFA
The Astrophysical JournalThe 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 +3 more
doaj +1 more source
Wildlife Biology, EarlyView.Roe deer is a species that hides their neonates as an anti‐predator strategy. This may prove efficient against mammalian predators, such as the red fox; however, it might be an ecological trap as large numbers of fawns are killed by tractors with harvesters each year during grass harvest.
Thomas Vogler +2 more
wiley +1 more source
The Impact of Initial Composition on Massive Star Evolution and Nucleosynthesis
The Astrophysical JournalWe study the sensitivity of presupernova evolution and supernova nucleosynthesis yields of massive stars to variations of the initial composition. We use the solar abundances from Lodders, and compute two different sets of initial stellar compositions ...
Christopher West +4 more
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The Spatial Homogeneity of Nebular and Stellar Oxygen Abundances in the Local Group Dwarf Irregular Galaxy NGC 6822 [PDF]
, 2005 To test the existence of a possible radial gradient in oxygen abundances within the Local Group dwarf irregular galaxy NGC 6822, we have obtained optical spectra of 19 nebulae with the EFOSC2 spectrograph on the 3.6 m telescope at ESO La Silla.
Henry Lee, E. Skillman, K. Venn
semanticscholar +1 more source
Abundance jump in the inner bulges of galaxies [PDF]
Symposium - International Astronomical Union, 1993 The metallicity difference of about an order between the kinematically decoupled nuclei and the surrounding bulges is found in 3 spiral galaxies possessing an axisymmetric potential in their centres.
openaire +1 more source
Plant Species Biology, EarlyView.Upon prolonged waterlogging, a Costus speciosus plant developed bulbils at stem node. Karyotype analysis, nucleolar staining, and anatomical study revealed its triploid status and developmental aspects. Prevalence of tetraploid, abundance, and unique reproductive fecundity of the triploid, indicates its determinant role in coexistence of the multiple ...
Surochita Basu +3 more
wiley +1 more source
The Astrophysical JournalWe present the elemental abundances and ages of 19 massive quiescent galaxies at z ∼ 1.4 and z ∼ 2.1 from the Keck Heavy Metal Survey. The ultradeep LRIS and MOSFIRE spectra were modeled using a full-spectrum stellar population fitting code with variable
Aliza G. Beverage +13 more
doaj +1 more source
Element Abundances at High Redshifts: The N/O Ratio in a Primeval Galaxy [PDF]
, 1995 The damped Lyman alpha systems seen in the spectra of high redshift QSOs offer the means to determine element abundances in galaxies observed while still at an early stage of evolution.
M. Pettini, K. Lipman, R. Hunstead
semanticscholar +1 more source
Abundance gradients in elliptical galaxies [PDF]
Astronomy & Astrophysics, 2003 Abundance gradients predicted by dissipative models of galaxy formation are studied with the aid of mass models of spherical galaxies obeying the Sersic R 1=n law in projection. The link between metallicity and stellar binding energies and angular momenta is derived from the "concentration model" by Lynden-Bell (1975) with the addition of a terminal ...
L. Angeletti, P. Giannone
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International Journal of Urban and Regional Research, EarlyView.Abstract In this article we apply Wacquant's conceptualization of the ghetto to an analysis of interviews conducted with Roma people living in the state‐enforced camps of Turin, Italy. We illustrate how the elements characterizing a ghetto according to Wacquant (i.e.
Vincenzo Romania, Tommaso Bertazzo
wiley +1 more source