Results 31 to 40 of about 1,069,925 (330)
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
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
Chemical Analysis of the Brightest Star of the Cetus II Ultrafaint Dwarf Galaxy Candidate
The Astrophysical Journal, 2023 We present a detailed chemical abundance analysis of the brightest star in the ultrafaint dwarf (UFD) galaxy candidate Cetus II from high-resolution Magellan/MIKE spectra.
K. B. Webber +44 more
doaj +1 more source
The oxygen abundance deficiency in irregular galaxies [PDF]
, 2000 The observed oxygen abundances in a number of irregular galaxies have been compared with predictions of the closed-box model of chemical and photometric evolution of galaxies. Oxygen is found to be deficient with respect to the predicted abundances. This
Ferrini, F., Pilyugin, L. S.
core +2 more sources
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
The Astrophysical Journal, 2023 We use the DR9 of the DESI legacy imaging survey and SDSS galaxy groups to measure the conditional luminosity function (CLF) for groups with halo mass M _h ≥ 10 ^12 M _⊙ and redshift 0.01 ≤ z ≤ 0.08, down to a limiting r -band magnitude of M _r = −10 to −
Jiacheng Meng +5 more
doaj +1 more source
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
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
GRB 100219A with X-shooter – abundances in a galaxy at z =4.7 [PDF]
, 2012 Context. Abundances of galaxies at redshifts z > 4 are di cult to obtain from damped Ly (DLA) systems in the sightlines of quasars (QSOs) due to the Ly forest blanketing and the low number of high-redshift quasars detected.
C. Thöne +28 more
semanticscholar +1 more source