Combining clustering and abundances of galaxy clusters to test cosmology and primordial non-Gaussianity [PDF]
, 2013 We present the clustering of galaxy clusters as a useful addition to the common set of cosmological observables. The clustering of clusters probes the large-scale structure of the Universe, extending galaxy clustering analysis to the high-peak, hig h ...
A. Mana +5 more
semanticscholar +1 more source
The Leoncino Dwarf Galaxy: Exploring the Low-metallicity End of the Luminosity–Metallicity and Mass–Metallicity Relations [PDF]
Astrophysical Journal, 2020 Extremely metal-poor (XMP) galaxies are low-mass, star-forming galaxies with gas-phase oxygen abundances below 12 + log(O/H) = 7.35 ( Z ). Galaxy evolution scenarios suggest three pathways to form an XMP: (1) secular evolution at low galaxy masses, (2 ...
K. McQuinn +12 more
semanticscholar +1 more source
Search for Extremely Metal-poor Stars with Gemini-N/Graces. I. Chemical-abundance Analysis
The Astrophysical Journal, 2023 We present stellar parameters and abundances of 13 elements for 18 very metal-poor (VMP; [Fe/H] < –2.0) stars, selected as extremely metal-poor (EMP; [Fe/H] < –3.0) candidates from the Sloan Digital Sky Survey and Large sky Area Multi-Object Fiber ...
Miji Jeong +7 more
doaj +1 more source
Simulations of the galaxy population constrained by observations from z=3 to the present day: implications for galactic winds and the fate of their ejecta [PDF]
, 2012 We apply Monte Carlo Markov Chain (MCMC) methods to large-scale simulations of galaxy formation in a LambdaCDM cosmology in order to explore how star formation and feedback are constrained by the observed luminosity and stellar mass functions of galaxies.
Angulo +110 more
core +2 more sources
Modelling element abundances in semi-analytic models of galaxy formation [PDF]
, 2013 We update the treatment of chemical evolution in the Munich semi-analytic model, L-GALAXIES. Our new implementation includes delayed enrichment from stellar winds, supernovae type II (SNe-II) and supernovae type Ia (SNe-Ia), as well as metallicity ...
R. Yates +5 more
semanticscholar +1 more source
Dust Masses, PAH Abundances, and Starlight Intensities in the SINGS Galaxy Sample [PDF]
, 2007 Physical dust models are presented for 65 galaxies in SINGS that are strongly detected in the four IRAC bands and three MIPS bands. For each galaxy we estimate (1) the total dust mass, (2) the fraction of the dust mass contributed by PAHs, and (3) the ...
B. Draine +21 more
semanticscholar +1 more source
Mapping Metallicity Variations across Nearby Galaxy Disks [PDF]
Astrophysical Journal, 2019 The distribution of metals within a galaxy traces the baryon cycle and the buildup of galactic disks, but the detailed gas phase metallicity distribution remains poorly sampled.
K. Kreckel +27 more
semanticscholar +1 more source
OXYGEN ABUNDANCE MEASUREMENTS OF SHIELD GALAXIES [PDF]
The Astrophysical Journal, 2015 We have derived oxygen abundances for 8 galaxies from the Survey of HI in Extremely Low-mass Dwarfs (SHIELD). The SHIELD survey is an ongoing study of very low-mass galaxies, with M$_{\rm HI}$ between 10$^{6.5}$ and 10$^{7.5}$ M$_{\odot}$, that were detected by the Arecibo Legacy Fast ALFA (ALFALFA) survey.
Haurberg, Nathalie C. +3 more
openaire +2 more sources
ELEMENTAL ABUNDANCES AND THEIR IMPLICATIONS FOR THE CHEMICAL ENRICHMENT OF THE BOÖTES I ULTRAFAINT GALAXY [PDF]
, 2012 We present a double-blind analysis of high-dispersion spectra of seven red giant members of the Boötes I ultrafaint dwarf spheroidal galaxy, complemented with re-analysis of a similar spectrum of an eighth-member star. The stars cover [Fe/H] from −3.7 to
G. Gilmore +5 more
semanticscholar +1 more source
CUMULATIVE OXYGEN ABUNDANCES OF SPIRAL GALAXIES [PDF]
The Astrophysical Journal, 2012 14 pages, 7 figures, 5 ...
Dack, Stuart, McCall, Marshall L.
openaire +2 more sources