Results 1 to 10 of about 112,562 (224)
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
Finding Peas in the Early Universe with JWST
The Astrophysical Journal Letters, 2023 The Early Release Observations (EROs) of JWST beautifully demonstrate the promise of JWST in characterizing the universe at Cosmic Dawn. We analyze the Near Infrared Spectrograph ERO spectra of three z ∼ 8 galaxies to determine their metallicities, gas ...
James E. Rhoads +8 more
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The Astrophysical Journal Supplement Series, 2023 This article reports a sample of 1830 strong [O iii ] λ 5007 emission-line compact galaxies discovered with the LAMOST spectroscopic survey and the photometric catalog of the Sloan Digital Sky Survey.
Siqi Liu +6 more
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The Astrophysical Journal, 2023 Current methods of identifying the ionizing source of nebular emission in galaxies are well defined for the era of single-fiber spectroscopy, but still struggle to differentiate the complex and overlapping ionization sources in some galaxies.
Victor D. Johnston +13 more
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CLEAR: Spatially Resolved Emission Lines and Active Galactic Nuclei at 0.6 < z < 1.3
The Astrophysical Journal, 2023 We investigate spatially resolved emission-line ratios in a sample of 219 galaxies (0.6 < z < 1.3) detected using the G102 grism on the Hubble Space Telescope Wide Field Camera 3 taken as part of the CANDELS Ly α Emission at Reionization survey to ...
Bren E. Backhaus +10 more
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Simulations of High-redshift [O iii] Emitters: Chemical Evolution and Multiline Diagnostics
The Astrophysical Journal, 2023 Recent observations by the James Webb Space Telescope discovered a number of high-redshift galaxies with strong emission lines from doubly ionized oxygen.
Yurina Nakazato +2 more
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Evolution of the Mass–Metallicity Relation from Redshift z ≈ 8 to the Local Universe
The Astrophysical Journal, 2023 A tight positive correlation between the stellar mass and the gas-phase metallicity of galaxies has been observed at low redshifts. The redshift evolution of this correlation can strongly constrain theories of galaxy evolution.
Danial Langeroodi +19 more
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Planetary Nebulae and the Ionization of the Interstellar Medium in Galaxies
Frontiers in Astronomy and Space Sciences, 2022 We discuss the role of planetary nebulae and their progeny in galaxy context in terms of ionization of the galaxy interstellar medium. This regards ionized gas outside the disk of spiral galaxies, the diffuse ionized medium in spiral galaxies, and the ...
Grażyna Stasińska +2 more
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Galaxy Evolution in a Pilot Survey up to z=1 and CDM Halos
Advances in Astronomy, 2011 We study spectral evolution of galaxies in a magnitude limited sample of 550 galaxies from z=1 down to z=0.3 on a pencil beam of ≈10′×10′. We concentrate on the large apparent cosmological structures along the line of sight, and we bin our individual ...
E. Giraud +6 more
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The Astrophysical Journal, 2023 We present rest-frame optical emission-line flux ratio measurements for five z > 5 galaxies observed by the James Webb Space Telescope Near-Infared Spectrograph (NIRSpec) in the SMACS 0723 Early Release Observations.
Jonathan R. Trump +65 more
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