Galaxy clusters

that this galaxy cluster was not identified by \textit{ROSAT} as a cluster suggests that there may be a hidden population of galaxy clusters hosting extreme central galaxies (i.e. starbursts and/or QSOs). Table~\ref{table::keyvalue} shows the key properties of both PKS1343-341 which are derived in this work ($R_{500}, M_{500}, M_{\rm{gas},500}, T_x, L_x, t_{\rm{cool},0}, \rm{SFR}$) and other similar clusters, including Abell 1795 (a strong cool core cluster) and 3C 186 (a quasar-mode cluster). \begin{deluxetable*}{ccccc}

The comet galaxy was founded on March 2, 2007. It is located within the Abell 2667 galaxy cluster. It is located about 3.2 billion lightyears away from our planet. It has been named the “Comet Galaxy,” due to the fact that it is a spiral shaped galaxy curved like a comet. It has not always appeared this way though. Natural forces have warped the image of this far away galaxy. Scorching gas plasma rips apart the galaxy as well as its movement throughout the clustered galaxy space. This galaxy, among

*Galaxies are beautiful and grand systems that exist in the universe. They come in different shapes and sizes, and they exist light years away. In this essay I will be writing about galaxies and touching upon my favorite galaxy the NGC 1512 Galaxy. Which has a prism of color in the center of its barred spiral galaxy, and it is a neighbor to our Milky Way. *What is a galaxy? According to Nasa.gov, a galaxy “is a huge collection of gas, dust and billions of stars and their solar systems”, (Site

to the universe. These stars, most likely from the late developing cluster of the first generation of stars, are strong evidence of primordial stars. Primordial stars are stars that are considered the original stars of the universe, and the precursors to the rest of the stars and celestial bodies in the universe. David Sobral and his team at the University of Lisbon led the work in finding this cluster of stars in a bright galaxy, named COSMOS Redshift 7 (CR7). The team at the University of Lisbon

Astronomy II Professor Robin Bryne Northeast State Community College Milky Way Report Home to Earth Our Earth is part of the galaxy known as the Milky Way. Astronomers for centuries have pointed their telescopes toward the Milky Way trying to discover the mysteries the galaxy holds. The white light that one can see is known to be the origin of our solar system. Milky Way galaxy is a gravitational bound system consisting of stars, stellar remnants, an interstellar medium of gas and dust, and dark matter

things, the Milky Way galaxy is just a microscopic portion of one single galaxy in the universe. The Sun that the Earth rotates around is one out of hundreds of billions of stars in out galaxy alone, and more than that our galaxy is but one of around 50 billion to 1 trillion galaxies, and that is just in the known universe. Nearby stars are separated from the Earth by light years, and relatively close by galaxies are so much father away even than that, with the most distant galaxies from our planet being

around the idea that centrally concentrated galaxy clusters or clusters hosting central QSOs can be misidentified as field AGN in the \textit{ROSAT} All-Sky Survey. By conducting an extensive follow-up survey of an all-sky X-ray point source catalog to look for galaxy overdensities, we will obtain a sample of such galaxy clusters. The primary question the sample will answer is whether there are other extreme-BCG clusters, similar to the Phoenix cluster, in our universe. This will tell us about the

Simulations of galaxy formation based on the Lambda Cold Dark matter (ΛCDM) cosmological model predict that a large galaxy such as the Milky Way should have many (~ 200) dwarf satellite galaxies. However, only about 20 or 30 have been identified. Where are the rest? Warm dark matter, constituting of sterile neutrinos, is lighter and since dwarf galaxies consisting mainly of dark matter are so difficult to find by visible light, there could be enough of them to reconcile the large number of dwarf

unusual bending of light in places where nothing but empty space exists as well as the unusual movement of stars and galaxies that can not be accounted for. The dark matter problem arose because of a difference in the masses of galaxies and larger cosmic structures. The components of these systems-stars and gas is in the description of galaxies. Gas and galaxies in the case of galaxy clusters move about but do not escape. They are restricted because they are watched over carefully by the gravitational

galactic cluster (a group of several galaxies) using two different methods. He tried to infer this mass from the speed of the galaxies. Just like kids on a merry-go-round have to hold on to avoid being ejected, galaxies are held together in a spinning galactic cluster by the gravitational force provided by the matter it contains. If there were not enough matter to create this force, the galaxies would simply scatter. He then compared his result with the mass evaluated from the light the galaxies shed