What is the density of planetary nebulae? What is the most distant star cluster? What is the life cycle of a star cluster like? What are the different types of galaxies? What is the redshift of the Virgo cluster of galaxies? What is the shape of the Magellanic Clouds?
What is the edge of a black hole called? How many galaxies are in the Virgo Supercluster? How massive are the largest known galaxies? What is the elliptical galaxy that is closest to the Milky Way? Which galaxies have the greatest redshift?
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 ...
We investigate the origin of these dispersions for red early-type galaxies, using two SDSS-based catalogs. We find that the sizes of faint galaxies (log(M_dyn/M_sun) < 10.3 or M_r > -19.5, where M_r is the r-band absolute magnitude, k-corrected to z = 0.1) are affected more ...
Redshift and blueshift describe the change in the frequency of a light wave depending on whether an object is moving towards or away from us.
20:26 Was Hubble the one to discover the redshift of galaxies?This was an error on my part; Hubble was using earlier work of Vesto Slipher on these redshifts, and combining it with his own measurements of distances using Leavitt’s law to arrive at the law that now bears his name; ...
The ionizing radiation increases this limit by a factor of a few compared to strong Lyman–Werner radiation alone. We conclude that the bright He?ii 1640?? emission recently observed from the high-redshift galaxy CR7 cannot be explained by Pop III stars alone. However, in some haloes, a ...
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...
The redshift of those photons allow us to calculate when they were emitted, what the distance of the galaxy was at that time, and what the present-day distance of the galaxy is. In the graph, the galaxy emitted the light when the universe was 2.5 billion years ...
Surveys to find high-redshift radio galaxies deliberately exclude optically-bright objects, which may be distant radio-loud quasars. In order to properly determine the space density of supermassive black holes, the fraction of such objects missed must be determined within a quantitative framework for...