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Hace 2 días · In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets ...
Hace 4 días · Galaxies are distributed in long filaments, huge “walls”, and large clusters, which astronomers call the large-scale structure of the cosmos. This structure is a tracer of dark matter, and is a way to understand how the universe has evolved. The 2MASS Redshift Survey (2MRS) is an ambitious map of the galaxies relatively close to the Milky Way.
Hace 21 horas · A new all-time record! JWST’s discovery of JADES-GS-z14-0 pushes the earliest galaxy ever seen to just 290 million years after the Big Bang. With newly acquired spectroscopic data from JWST's ...
Hace 4 días · 31 May 2024, 00:07 BST. The James Webb Space Telescope has smashed its own record for detecting the most distant known galaxy. Called JADES-GS-z14-0, the collection of stars was spied as it was a ...
Hace 3 días · Here, we study the rest-frame UV spectral slope, $\beta$, measured via model spectra obtained via spectral energy distribution (SED) fitting, $\beta_{SED}$, and explore its correlation with various galaxy parameters (photometric redshift, UV magnitude, stellar mass, dust attenuation, star formation rate [SFR], and specific SFR) obtained via SED fitting with Dense Basis.
Hace 2 días · The Webb telescope's powerful abilities. The Webb telescope — a scientific collaboration between NASA, ESA, and the Canadian Space Agency — is designed to peer into the deepest cosmos and reveal new insights about the early universe. But it's also peering at intriguing planets in our galaxy, along with the planets and moons in our solar system.
Hace 21 horas · Quiescent elliptical galaxies have a consistent drop in light emission at 4000 Å, which enables accurate photo-zs with this so-called red sequence of galaxies, which allows the bounding of the redshift between different band passes and is particularly useful for identifying cluster members and lensing galaxy samples (e.g. the RedMaPPer algorithm in Rykoff et al. 2014, 2016).
