Results 31 to 40 of about 266,062 (301)
Characterizing Extreme Emission-line Galaxies. I. A Four-zone Ionization Model for Very High-ionization Emission [PDF]
Astrophysical Journal, 2021 Stellar population models produce radiation fields that ionize oxygen up to O+2, defining the limit of standard H ii region models (54.4 eV). The four-zone model has little to no effect on the measured total nebular abundances, but does change the ...
D. Berg +5 more
semanticscholar +1 more source
GLEAM: Galaxy Line Emission & Absorption Modeling [PDF]
The Astronomical Journal, 2021 Abstract We present Galaxy Line Emission & Absorption Modeling (gleam), a Python tool for fitting Gaussian models to emission and absorption lines in large samples of 1D extragalactic spectra. gleam is tailored to work well in batch mode without much human interaction.
Andra Stroe, Victor-Nicolae Savu
openaire +2 more sources
CLEAR: High-ionization [Ne v] λ3426 Emission-line Galaxies at 1.4 < z < 2.3 [PDF]
Astrophysical Journal, 2022 We analyze a sample of 25 [Ne v] (λ3426) emission-line galaxies at 1.4 < z < 2.3 using Hubble Space Telescope/Wide Field Camera 3 G102 and G141 grism observations from the CANDELS Lyα Emission at Reionization (CLEAR) survey.
N. Cleri +15 more
semanticscholar +1 more source
Cosmological constraints from the power spectrum of eBOSS emission line galaxies [PDF]
Physical Review D, 2021 We present cosmological parameter measurements from the effective field theory-based full-shape analysis of the power spectrum of emission line galaxies (ELGs). First, we perform extensive tests on simulations and determine appropriate scale cuts for the
M. Ivanov
semanticscholar +1 more source
GALAXY EMISSION LINE CLASSIFICATION USING THREE-DIMENSIONAL LINE RATIO DIAGRAMS [PDF]
The Astrophysical Journal, 2014 ABSTRACT Two-dimensional (2D) line ratio diagnostic diagrams have become a key tool in understanding the excitation mechanisms of galaxies. The curves used to separate the different regions—H ii-like or excited by an active galactic nucleus (AGN)—have been refined over time but the core technique has not evolved significantly.
F. Vogt +7 more
openalex +5 more sources
Characterizing Extreme Emission Line Galaxies. II. A Self-consistent Model of Their Ionizing Spectrum [PDF]
Astrophysical Journal, 2021 Observations of high-redshift galaxies (z > 5) have shown that these galaxies have extreme emission lines with equivalent widths much larger than their local star-forming counterparts.
G. Olivier +5 more
semanticscholar +1 more source
The assembly bias of emission-line galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT The next generation of spectroscopic surveys will target emission-line galaxies (ELGs) to produce constraints on cosmological parameters. We study the large-scale structure traced by ELGs using a combination of a semi-analytical model of galaxy formation, a code that computes the nebular emission from H ii regions using the ...
Esteban Jiménez +5 more
openaire +3 more sources
Modelling emission lines in star-forming galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT We present a new model to compute the luminosity of emission lines in star-forming galaxies and apply this in the semi-analytical galaxy formation code galform. The model combines a pre-computed grid of H II region models with an empirical determination of how the properties of H II regions depend on the macroscopic properties ...
C M Baugh +3 more
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Study of star formation rate and metallicity of the low redshift (z < 0.02) dwarf galaxies
Bibechana, 2021 In this paper, we have presented an analysis of emission lines from two dwarf galaxies. We analyzed the strongest emission lines of wavelength ranging from 4100 Å to 6700 Å.
S. P. Gautam +4 more
doaj +3 more sources
UNITSIM-Galaxies: data release and clustering of emission-line galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT New surveys such as European Space Agencys (ESA’s) Euclid mission are planned to map with unprecedented precision the large-scale structure of the Universe by measuring the 3D positions of tens of millions of galaxies. It is necessary to develop theoretically modelled galaxy catalogues to estimate the expected performance and to
Alexander Knebe +9 more
openaire +3 more sources