Galaxy clusters

Page 1 of 50 - About 500 essays
  • Key Properties Of Galaxy Clusters

    1371 Words  | 6 Pages

    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}

  • Research Paper On Comet Galaxy

    475 Words  | 2 Pages

    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

  • Different Types Of Superclusters

    998 Words  | 4 Pages

    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

  • The First Generation Of Stars

    867 Words  | 4 Pages

    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

  • The All Sky Survey

    1357 Words  | 6 Pages

    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

  • Dwarf Galaxies: The Milky Way

    441 Words  | 2 Pages

    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

  • Does Dark Matter Exist

    554 Words  | 3 Pages

    atomic matter (stars and galaxies), 72 percent is made of dark energy and 23 percent is made of dark matter [1]. Ordinary matter is easily detected as it emits or reflects light but dark matter is an invisible entity so how do we know it even exists? Fritz Zwicky was one of the first astronomers to suspect the existence of dark matter through observations of the Coma Cluster, a galactic cluster. Zwicky determined the mass of the Coma Cluster using the velocities of galaxies and then determined the

  • Essay about The Theory of Dark Flow

    847 Words  | 4 Pages

    Imagine a mystical, invisible influential power, pulling our galaxy far, far away from where it should be. Imagine the milky way being pulled millions and millions of km away. The planets pulled far apart from each other. This would ensure a certain demise of current life forms, forever changing our world. This is the effect of dark flow. Fortunately this appears to be occurring in distant galaxies, however observations have concluding our galaxy is too being pulled away in a specific direction. This

  • Clusters Case Study

    719 Words  | 3 Pages

    introduce the beginning phase of the Cluster Hiding in Plain Sight (\textit{CHiPS}) survey with the aim to discover new galaxy clusters surrounding bright point sources. We also present \textit{Chandra} observations of a newly discovered low-shift, z=0.2230, galaxy cluster with a central quasar, PKS1353-341. After removing the quasar brightness from the cluster core, we determine various properties of the cluster down to the center core. The average temperature of the cluster gas is $4.3\pm1.9$ keV with an

  • Physics : Dark Matter, The Sun, Other Stars, And Galaxies

    1462 Words  | 6 Pages

    The visible universe- including Earth, the sun, other stars, and galaxies is made of protons, neutrons, and electrons bundled together into atoms (National Geographic, 2012). Astronomers use the term ‘baryonic’ to refer to all objects made of normal atomic matter, essentially ignoring the presence of electrons (Swinburne University, 2015). Baryons interact with each other through gravity, nuclear forces and the electrostatic force. These interactions are what allow baryonic matter (such as stars)