A redshift is a shift in the frequency of an electromagnetic wave caused by an object’s motion. Light from objects moving away from an observer have their light waves shifted toward the red part of the spectrum. Redshift is commonly observed inastronomy, particularly in the observation of ve...
GalaxiesRedshiftsWe investigate the origin of the huge luminosities produced by high-redshift SCUBA galaxies using the combination of ultra-deep X-ray observations (the 2Ms Chandra Deep Field-North) and deep optical spectroscopic data. Even though a large fraction of high-redshift SCUBA galaxies ...
1. Why does the term 'redshift' refer to the color red? Red is the shorter wavelength color of the rainbow. Red is the longer wavelength color of the rainbow. The red color comes first in the rainbow. It refers to red stars.
American astronomer Edwin Hubble (who the Hubble Space Telescope is named after) was the first to describe the redshift phenomenon and tie it to an expanding universe. His observations, revealed in 1929, showed that nearly all galaxies he observed are moving away, NASA said. "This phenomenon ...
Tifft that galaxy redshifts come in bunched intervals rather than on a smooth continuum. Difficulties in measuring redshifts; Example of why Tifft's claims are unusual; Reports of studies that seem to confirm Tifft's claims; Other claims on Tifft. 年份: 1992 ...
However, thetime available for the growth of galaxies is shorter than theentire age of the universe at the corresponding redshift.Turner (1991) recognized that exceptionally bright,high–redshift quasars may yield interesting constraints oncosmic structure formation. Motivated by the recent dis-covery...
Candidate galaxies at redshifts of z \\sim 10 z \\sim 10 are now being found in extremely deep surveys, probing very small areas. As a consequence, candid... J Matthee,D Sobral,M Swinbank,... - 《Monthly Notices of the Royal Astronomical Society》 被引量: 8发表: 2014年 Metal–met...
This dataset is unique as for the morphological information on faint high-z sources, and for complete photometric and spectroscopic coverage. The majority of bright early-type galaxies in this field are found at redshifts $z \\leq 1.3$ to share common properties with those of high-z cluster...
Gravitational redshift Theelectromagnetic radiationof an object is stretched out slightlyinside a gravitational field. Think of the sound waves that emanate from a siren on an emergency vehicle; as the vehicle moves toward an observer, sound waves are compressed, but as it moves away, they are ...
In this paper we compute the quantity which is truly measured in a large galaxy survey. We take into account the effects coming from the fact that we actually observe galaxy redshifts and sky positions and not true spatial positions. Our calculations are done within linear perturbation theory ...