Results 111 to 120 of about 210,144 (261)
ChemPhysChem, Volume 26, Issue 18, September 19, 2025.In bulk carbonic acid (e.g., in interstellar icy dust grains) cluster formation produces two distinct UV‐Vis spectral features redshifted by ≈2 eV (25 nm) and by ≈5 eV (80 nm) compared to gas phase single molecule carbonic acid 's adiabatic ionization energy. Theory and experiment were used to investigate the origin of these shifts.
Dennis F. Dinu +7 more
wiley +1 more source
PRECISE STRONG LENSING MASS MODELING OF FOUR HUBBLE FRONTIER FIELD CLUSTERS AND A SAMPLE OF MAGNIFIED HIGH-REDSHIFT GALAXIES [PDF]
, 2015 We conduct precise strong lensing mass modeling of four Hubble Frontier Field (HFF) clusters, Abell 2744, MACS J0416.1−2403, MACS J0717.5+3745, and MACS J1149.6+2223, for which HFF imaging observations are completed. We construct a refined sample of more
R. Kawamata +4 more
semanticscholar +1 more source
CEERS Key Paper. III. The Diversity of Galaxy Structure and Morphology at z = 3–9 with JWST
The Astrophysical Journal Letters, 2023 We present a comprehensive analysis of the evolution of the morphological and structural properties of a large sample of galaxies at z = 3–9 using early James Webb Space Telescope (JWST) CEERS NIRCam observations. Our sample consists of 850 galaxies at z
Jeyhan S. Kartaltepe +61 more
doaj +1 more source
The Properties of High Redshift Galaxies [PDF]
Astrophysics and Space Science, 2001 Summary of the Discussion Session on ``Evolution with Redshift'' at the Conference on The Evolution of Galaxies. I - Observational Clues, edited by J.M. Vilchez, G. Stasinska and E. Perez, Astrophysics and Space Science (Kluwer, The Netherlands). 10 Latex pages plus 2 encapsulated postscript figures.
Calzetti, D., Giavalisco, M.
openaire +2 more sources
The Radio-to-Submm Spectral Index as a Redshift Indicator [PDF]
, 1998 We present models of the 1.4 GHz to 350 GHz spectral index, alpha(350/1.4), for starburst galaxies as a function of redshift. The models include a semi-analytic formulation, based on the well quantified radio-to-far infrared correlation for low redshift ...
C. L. Carilli +9 more
core +6 more sources
Two Micron‐Size Dark Dimensions
Fortschritte der Physik, Volume 73, Issue 8, August 2025.Abstract Two extra dimensions of micron scale might simultaneously address the gauge and cosmological hierarchy problems. In this paper various observational bounds in scenarios with one and two large extra dimensions are examined, to see if they are compatible with the micron scale.
Luis A. Anchordoqui +2 more
wiley +1 more source
DUST ATTENUATION IN HIGH REDSHIFT GALAXIES: “DIAMONDS IN THE SKY” [PDF]
, 2014 We use observed optical to near-infrared spectral energy distributions (SEDs) of 266 galaxies in the COSMOS survey to derive the wavelength dependence of the dust attenuation at high redshift. All of the galaxies have spectroscopic redshifts in the range
N. Scoville +5 more
semanticscholar +1 more source
Low-redshift Analogs of Cosmic Noon Galaxies as Laboratories for Clumpy Star Formation
The Astrophysical JournalIt has been established that a significant fraction of star formation at high redshift occurs in clumpy galaxies. The properties of clumps and their formation mechanisms, however, remain highly debated. In this work we analyze a sample of 18 supercompact
Jorge M. Santos-Junior +5 more
doaj +1 more source
THE PREMATURE FORMATION OF HIGH-REDSHIFT GALAXIES [PDF]
The Astronomical Journal, 2014 Accepted for publication in the Astronomical ...
openaire +2 more sources
Astronomische Nachrichten, Volume 346, Issue 5, June 2025.ABSTRACT Classification of galaxies, stars, and quasars using spectral data is fundamental to astronomy, but often relies heavily on redshift. This study evaluates the performance of 10 machine learning algorithms on SDSS data to classify these objects, with a particular focus on scenarios where redshift information is unavailable.
Debashis Chatterjee, Prithwish Ghosh
wiley +1 more source