Results 21 to 30 of about 103,015 (280)
The HDUV Survey: A Revised Assessment of the Relationship between UV Slope and Dust Attenuation for High-redshift Galaxies [PDF]
, 2017 We use a newly assembled sample of 3545 star-forming galaxies with secure spectroscopic, grism, and photometric redshifts at z = 1.5–2.5 to constrain the relationship between UV slope (β) and dust attenuation (LIR/LUV ≡ IRX).
N. Reddy +15 more
semanticscholar +1 more source
The Astrophysical Journal, 2023 High-resolution imaging of galaxies in rest-frame UV has revealed the existence of giant star-forming clumps prevalent in high-redshift galaxies. Studying these substructures provides important information about their formation and evolution and informs ...
Zahra Sattari +27 more
doaj +1 more source
The erratic dynamical life of black hole seeds in high-redshift galaxies [PDF]
Monthly notices of the Royal Astronomical Society, 2019 The dynamics of black hole seeds in high redshift galaxies is key to understand their ability to grow via accretion and to pair in close binaries during galactic mergers.
H. Pfister +4 more
semanticscholar +1 more source
High Redshift Radio Galaxies [PDF]
Symposium - International Astronomical Union, 1996 One hundred years after G. Marconi recorded radio waves over a distance of more than 1000 m, the most sensitive radio telescopes are able to detect the radio emission from light travel distances at least 1.4 × 1023 times greater. The electromagnetic waves from these distant objects are red shifted by Δλ/λ = z > 4. It is not the mere distance of high
Mark J. Neeser +2 more
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Spectral Templates Optimal for Selecting Galaxies at z > 8 with the JWST
The Astrophysical Journal, 2023 The selection of high-redshift galaxies often involves spectral energy distribution (SED) fitting to photometric data, an expectation for contamination levels, and measurement of sample completeness—all vetted through comparison to spectroscopic redshift
Rebecca L. Larson +11 more
doaj +1 more source
The physics of Lyman α escape from high-redshift galaxies [PDF]
Monthly notices of the Royal Astronomical Society, 2018 Lyman-alpha (Ly{\alpha}) photons from ionizing sources and cooling radiation undergo a complex resonant scattering process that generates unique spectral signatures in high-redshift galaxies. We present a detailed Ly{\alpha} radiative transfer study of a
Aaron Smith +6 more
semanticscholar +1 more source
Galaxies at High Redshift [PDF]
Astrophysics and Space Science, 1999 Within just the last few years, we have advanced from knowing only a few galaxies at z>2 to having redshifts for nearly 1000 z~2-5 objects. The majority of this sample has been detected through the photometric ``drop-out'' technique used so successfully by Steidel and his collaborators. In addition, a handful of objects have already been detected at
openaire +3 more sources
The nature of high-redshift galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 1998 Using semi-analytic models of galaxy formation set within the Cold Dark Matter (CDM) merging hierarchy, we investigate several scenarios for the nature of the high-redshift ($z \ga 2$) Lyman-break galaxies (LBGs). We consider a ``collisional starburst'' model in which bursts of star formation are triggered by galaxy-galaxy mergers, and find that a ...
Joel R. Primack +3 more
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The Astrophysical Journal Supplement Series, 2023 JWST has revolutionized the field of extragalactic astronomy with its sensitive and high-resolution infrared view of the distant Universe. Adding to the new legacy of JWST observations, we present the first NIRCam imaging data release from the JWST ...
Marcia J. Rieke +58 more
doaj +1 more source
On the Number of Galaxies at High Redshift [PDF]
Galaxies, 2015 The number of galaxies at a given flux as a function of the redshift, z, is derived when the z-distance relation is non-standard. In order to compare different models, the same formalism is also applied to the standard cosmology. The observed luminosity function for galaxies of the zCOSMOS catalog at different redshifts is modeled by a new luminosity ...
openaire +5 more sources