Spectral evolution with increasing stellar metallicity
Spectroscopy of Galaxies: Evolution of Escape Fractions, Metallicity Gradients and Stellar Metallicity
... non-existent metallicity gradients than in previous studies of smaller samples observed in the same redshift ...the metallicity and none with the degree of rotational support, the latter being consistent ...
186
Evolution of the Stellar Mass–Metallicity Relation. I. Galaxies in the z ∼ 0.4 Cluster Cl0024
... In Section 2, we describe the data and their com- pleteness. In Section 3, we describe the method we used to measure ages and metallicities including how it performed as a function of signal-to-noise ratio and when the ...
22
Evolution of the Stellar Mass–Metallicity Relation. I. Galaxies in the z ∼ 0.4 Cluster Cl0024
... the stellar MZR in the past few ...the evolution of both gas-phase and stellar MZRs with redshift from a limited number of galaxies in the Feedback in Realistic Environment (FIRE) cosmological ...
16
Stellar Astrophysics: Stellar Evolution 1. Stellar Evolution
... The increasing gravity due to the contraction is balanced by the heat or the luminosity due to the conversion of gravitational energy to thermal ...smaller stellar radius translates into a hotter effective ...
23
Insights on the stellar mass metallicity relation from the CALIFA survey
... resolved spectral synthesis of CALIFA ...First, stellar metallicities reflect the whole history of a galaxy, while O/H measures a present-day snapshot of its ...spheroids, increasing statistics and ...
5
The GALAH survey: stellar streams and how stellar velocity distributions vary with Galactic longitude, hemisphere, and metallicity
... In Fig. 9, u and v velocity components for the same peaks seen in velocity distributions of Figs 6 and 7 are plotted against galactic longitude l. Small triangles show peaks in the low-metallicity stars, squares ...
27
Trends of Stellar Evolution in Modern Physics
... The internal forces of gravity, while the cloud continues to be in a gaseous form, always do work, remaining active forces and not turning into potential forces. Thus, in the absence of losses, the forces of gravity ...
17
Stellar evolution and the Standard Solar Model
... The stellar gas pressure is mainly due to its ...contracts increasing its temperature and reaching again the hydrostatic equilibrium until the radiation losses from the surface cools down again the ...
13
X-ray spectral states and metallicity of Ultra Luminous X-ray sources: a deeper insight into their spectral properties
... an anticorrelation in NGC ULX1, we suggest that at the highest flux levels, massive and unsaturated turbulent outflows are ejected. Finally, persistent ULXs, as those discussed above, do not allow us an easy compari- son ...
218
Recycled stellar ejecta as fuel for star formation and implications for the origin of the galaxy mass-metallicity relation
... recycled stellar evolution products in the gas budget of a number of nearby disc galaxies (including the Milky ...of stellar population ages and a set of stellar yields and lifetimes, and ...
24
The Evolution of the Galaxy Stellar Mass Function at z = 4-8: A Steepening Low-mass-end Slope with Increasing Redshift
... While this study provides better constraints on the GSMF at z = 4–8, the uncertainties of the GSMFs on both mass ends and at the highest redshift probed in this study are still substantial. Although the advent of JWST ...
26
Stellar Feedback and Chemical Evolution In Dwarf Galaxies
... chemical evolution are complex, driven by the details of stellar feedback, turbulence and diffusion in a multi-phase ISM, and variations in stellar yields with nucleosynthetic source and ...
247
Elliptical galaxies : structure, stellar content, and evolution
... The data in this paper comprise a large and homogeneous sample of galaxy photom- etry suitable for a wide range of follow–up studies. The primary purpose for this study was to study the wavelength dependence of the slope ...
355
A teaching-learning module on stellar structure and evolution
... phase: spectral analysis We introduce the second phase activities asking students the following driving questions “Which quantities can we measure using light emitted by ...
9
Resolved galaxy scaling relations in the EAGLE simulation: star formation, metallicity, and stellar mass on kpc scales
... and stellar properties of simulated galaxies, we assess how well the simulation reproduces the local relations and how they become ...on evolution, showing how the kpc-scale relations vary with redshift, as ...
20
HERBIG-HARO FLOWS: Probes of Early Stellar Evolution
... 8.2. The Utility of Giant HH Flows The large sizes and high dynamical ages of outflows from young, low-mass stars has a number of important implications. 8.2.1. MASS-LOSS HISTORIES OF YSOs The morphology and kinematics ...
58
Physical and chemical aspects of late stages of stellar evolution
... 34 Mass transfer in symbiotic stars J. Mikołajewska, Nicolaus Copernicus Astronomical Center, Warszawa, Poland Among the most fundamental questions posed by symbiotic binaries is the process of mass transfer, whether it ...
82
From K giants to G dwarfs: stellar lifetime effects on metallicity distributions derived from red giants
... 4.1 Bias corrections applied to real data The synthetic RGBs constructed here assume a constant SFH and a flat AMR; thus, the number density contours in Fig. 4 cannot be applied directly to a real stellar system ...
12
Radio Spectral Evolution with Photonics Technologies
... 18(c) for each line indicated in Fig. 18(b) [15]. IV. Conclusion We have described how effectively to explore untapped frequency regions from 100 GHz to 1 THz, using ultra-broadband photonics technologies. Use of optical ...
6
Stellar Metallicity Gradients in SDSS Galaxies
... infer stellar metallicity and abundance ratio gradients for a sample of red galaxies in the Sloan Digital Sky Survey (SDSS) Main galaxy ...into stellar mass bins, stack their spectra in redshift ...
17