Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Download Satellite Galaxies In The Local Group full books in PDF, epub, and Kindle. Read online Satellite Galaxies In The Local Group ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Author : Manuel Metz
Publisher :
ISBN 13 :
Total Pages : 147 pages
Book Rating : 4.:/5 (269 download)
Download or read book Satellite Galaxies in the Local Group written by Manuel Metz and published by . This book was released on 2008 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David Martínez-Delgado
Publisher : Cambridge University Press
ISBN 13 : 1107434173
Total Pages : 250 pages
Book Rating : 4.1/5 (74 download)
Download or read book Local Group Cosmology written by David Martínez-Delgado and published by Cambridge University Press. This book was released on 2013-10-21 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most fascinating unresolved problems of modern astrophysics is how the galaxies we observe today were formed. The Lambda-Cold Dark Matter paradigm predicts that large spiral galaxies such as the Milky Way formed through accretion and tidal disruption of satellite galaxies. The galaxies of the Local Group provide the best laboratory in which to investigate these galaxy formation processes because they can be studied with sufficiently high resolution to exhume fossils of galactic evolution embedded in the spatial distribution, kinematics, and chemical abundances of their oldest stars. Based on the twentieth Winter School of the Canary Islands Institute of Astrophysics, this volume provides a firm grounding for graduate students and early career researchers working on Local Group cosmology. It presents modules from eight eminent and experienced scientists at the forefront of Local Group research, and includes overviews of observational techniques, diagnostic tools, and various theoretical models.
Author : John Isaac Phillips
Publisher :
ISBN 13 : 9781369174632
Total Pages : 135 pages
Book Rating : 4.1/5 (746 download)
Download or read book The Evolution of Satellite Galaxies in Local Group-like Systems written by John Isaac Phillips and published by . This book was released on 2016 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: The evolution of galaxies is profoundly impacted by the environments in which they live. Satellite galaxies or larger hosts are particularly susceptible to this effect, and this dissertation examines the ways in which satellite galaxies and host galaxies interact and co-evolve. The picture we present coherently indicates how satellite galaxy mass impacts how satellite galaxies quench over five orders of magnitude in mass, with low-mass objects efficiently quenched, high mass objects inefficiently quenched. We also provide evidence for a sharp delineation between the two regimes, and indicate that the mass and star-formation rate of the host is correlated with dramatic changes to our model.
Author : Sidney Bergh
Publisher : Cambridge University Press
ISBN 13 : 1139429655
Total Pages : 348 pages
Book Rating : 4.1/5 (394 download)
Download or read book The Galaxies of the Local Group written by Sidney Bergh and published by Cambridge University Press. This book was released on 2000-05-15 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Local Group is a small cluster of galaxies that includes the Milky Way. At least half of all galaxies in the Universe are thought to belong to similar groups. This authoritative volume provides a comprehensive synthesis of what is known about the Local Group. It begins with a summary of each member galaxy, as well as those galaxies previously regarded as possible members. The book examines the mass, stability and evolution of the Local Group as a whole and includes many important previously unpublished results and conclusions. With clarity, Professor van den Bergh provides a masterful summary of all that is known about the galaxies of the Local Group and their evolution, and expertly places this knowledge in the wider context of on-going studies of galaxy formation and evolution, the cosmic distance scale, and the conditions in the early Universe.
Author : Christoph Engler
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (129 download)
Download or read book Populations of Satellite Galaxies with the IllustrisTNG Simulations written by Christoph Engler and published by . This book was released on 2022 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ryan Speller
Publisher :
ISBN 13 :
Total Pages : 82 pages
Book Rating : 4.:/5 (13 download)
Download or read book Local Group Analogues written by Ryan Speller and published by . This book was released on 2012 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: The abundance of satellite galaxies is a critical small-scale test of the standard cosmological model. From comparing the predictions of structure formation in simulations with observations of Local Group dwarf galaxies there is a clear mismatch in the abundance, leading to the so-called "missing satellites" problem. The comparison between simulation and observation have, however, suffered from a limited sample of satellite galaxies, with the only reasonably complete sample being from the most local galaxy groups. It is unknown whether the observed abundance of dwarf satellite galaxies of the nearest groups is statistically representative of the abundance of dwarf satellites in the greater universe.
Author : Joss Bland-Hawthorn
Publisher : Springer Science & Business Media
ISBN 13 : 3642417205
Total Pages : 240 pages
Book Rating : 4.6/5 (424 download)
Download or read book The Origin of the Galaxy and Local Group written by Joss Bland-Hawthorn and published by Springer Science & Business Media. This book was released on 2014-02-11 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the updated and expanded lecture notes of the 37th Saas-Fee Advanced Course organised by the Swiss Society for Astrophysics and Astronomy. It offers the most comprehensive and up to date review of one of the hottest research topics in astrophysics - how our Milky Way galaxy formed. Joss Bland-Hawthorn & Ken Freeman lectured on Near Field Cosmology - The Origin of the Galaxy and the Local Group. Francesca Matteucci’s chapter is on Chemical evolution of the Milky Way and its Satellites. As designed by the SSAA, books in this series – and this one too – are targeted at graduate and PhD students and young researchers in astronomy, astrophysics and cosmology. Lecturers and researchers entering the field will also benefit from the book.
Author : Bärbel Silvia Koribalski
Publisher : Springer Science & Business Media
ISBN 13 : 1402069332
Total Pages : 375 pages
Book Rating : 4.4/5 (2 download)
Download or read book Galaxies in the Local Volume written by Bärbel Silvia Koribalski and published by Springer Science & Business Media. This book was released on 2009-04-29 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: This timely book presents an overview of the galaxies within the Local Volume, including the Local Group and our closest neighbours, the Andromeda Galaxy and the Magellanic Clouds. Presented here are the latest results from radio, infrared and optical surveys as well as detailed multi-wavelength studies of individual galaxies. The book aims to provide a vibrant forum for presentations and discussions across a broad range of astrophysical topics.
Author : Luis Carlos Vargas
Publisher :
ISBN 13 :
Total Pages : 426 pages
Book Rating : 4.:/5 (953 download)
Download or read book A Spectroscopic Survey of Chemical Evolution in Local Group Dwarf Satellite Galaxies written by Luis Carlos Vargas and published by . This book was released on 2015 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David Martínez Delgado
Publisher :
ISBN 13 : 9781107416567
Total Pages : pages
Book Rating : 4.4/5 (165 download)
Download or read book Local Group Cosmology written by David Martínez Delgado and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "One of the most fascinating unresolved problems of modern astrophysics is how the galaxies we observe today were formed. The Lambda-Cold Dark Matter paradigm predicts that large spiral galaxies such as the Milky Way formed through accretion and tidal disruption of satellite galaxies, a notion previously postulated on empirical grounds from the character of stellar populations found in our Galaxy. The Local Group galaxies are the best laboratory in which to investigate these galaxy formation processes because they can be studied with sufficiently high resolution to exhume fossils of galactic evolution embedded in the spatial distribution, kinematics, and chemical abundances of their oldest stars"--Provided by publisher.
Author : Azadeh Fattahi
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (119 download)
Download or read book The Local Group and Its Dwarf Galaxy Members in the Standard Model of Cosmology written by Azadeh Fattahi and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: According to the current cosmological paradigm, ``Lambda Cold Dark Matter'' (LambdaCDM), only ~20% of the gravitating matter in the universe is made up of ordinary (i.e. baryonic) matter, while the rest consists of invisible dark matter (DM) particles, which existence can be inferred from their gravitational influence on baryonic matter and light. Despite the large success of the LambdaCDM model in explaining the large scale structure of the Universe and the conditions of the early Universe, there has been debate on whether this model can fully explain the observations of low mass (dwarf) galaxies. The Local Group (LG), which hosts most of the known dwarf galaxies, is a unique laboratory to test the predictions of the LambdaCDM model on small scales. I analyze the kinematics of LG members, including the Milky~Way-Andromeda (MW-M31) pair and dwarf galaxies, in order to constrain the mass of the LG. I construct samples of LG analogs from large cosmological N-body simulations, according to the following kinematics constraints: (a) the separation and relative velocity of the MW-M31 pair; (b) the receding velocity of dwarf galaxies in the outskirts of the LG. I find that these constraints yield a median total mass of 2*10^#x12; solar masses for the MW and M31, but with a large uncertainty. Based on the mass and the kinematics constraints, I select twelve LG candidates for the APOSTLE simulations project. The APOSTLE project consists of high-resolution cosmological hydrodynamical simulations of the LG candidates, using the EAGLE galaxy formation model. I show that dwarf satellites of MW and M31 analogs in APOSTLE are in good agreement with observations, in terms of number, luminosity and kinematics. There have been tensions between the observed masses of LG dwarf spheroidals and the predictions of N-body simulations within the LambdaCDM framework; simulations tend to over-predict the mass of dwarfs. This problem is known as the ``too-big-to-fail'' problem. I find that the enclosed mass within the half-light radii of Galactic classical dwarf spheroidals, is in excellent agreement with the simulated satellites in APOSTLE, and that there is no too-big-to-fail problem in APOSTLE simulations. A few factors contribute in solving the problem: (a) the mass of haloes in hydrodynamical simulations are lower compared to their N-body counterparts; (b) stellar mass-halo mass relation in APOSTLE is different than the ones used to argue for the too-big-to-fail problem; (c) number of massive satellites correlates with the virial mass of the host, i.e. MW analogs with virial masses above ~ 3*10^#x12; solar masses would have faced too-big-to-fail problems; (d) uncertainties in observations were underestimated in previous works. Stellar mass-halo mass relation in APOSTLE predicts that all isolated dwarf galaxies should live in haloes with maximum circular velocity (V_max) above 20 km/s. Satellite galaxies, however, can inhabit lower mass haloes due to tidal stripping which removes mass from the inner regions of satellites as they orbit their hosts. I examine all satellites of the MW and M31, and find that many of them live in haloes less massive than V_max=20 km/s. I additionally show that the low mass population is following a different trend in stellar mass-size relation compared to the rest of the satellites or field dwarfs. I use stellar mass-halo mass relation of APOSTLE field galaxies, along with tidal stripping trajectories derived in Penarrubia et al., in order to predict the properties of the progenitors of the LG satellites. According to this prediction, some satellites have lost a significant amount of dark matter as well as stellar mass. Cra~II, And~XIX, XXI, and XXV have lost 99 per-cent of their stellar mass in the past. I show that the mass discrepancy-acceleration relation of dwarf galaxies in the LG is at odds with MOdified Newtonian Dynamics (MOND) predictions, whereas tidal stripping can explain the observations very well. I compare observed velocity dispersion of LG satellites with the predicted values by MOND. The observations and MOND predictions are inconsistent, in particular in the regime of ultra faint dwarf galaxies.
Author : David J. Eicher
Publisher : Clarkson Potter
ISBN 13 : 0525574328
Total Pages : 258 pages
Book Rating : 4.5/5 (255 download)
Download or read book Galaxies written by David J. Eicher and published by Clarkson Potter. This book was released on 2020-05-26 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tour the incredible scope of the cosmos as we know it with the editor in chief of Astronomy, featuring jaw-dropping illustrations and full-color photography from the magazine’s archives, much of it never before published. “The natural history of the galaxies is majestic and deserves its own David Attenborough. In David Eicher, it may have just found him.”—Richard Dawkins Journey to the edges of our galaxy and beyond with one of the most widely recognized astronomy experts as your guide. Delve into the history of stargazing and space observation, learn how black holes power galaxies, and understand the classification of the different galaxy types. This illuminating book—with artful illustrations and never-before-seen space photography—will open your mind to the wonders of the universe that await.
Author : Kenza Sigrid Arraki
Publisher :
ISBN 13 :
Total Pages : 312 pages
Book Rating : 4.:/5 (958 download)
Download or read book Evolution of Dwarf Galaxy Properties in Local Group Environments written by Kenza Sigrid Arraki and published by . This book was released on 2016 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding galaxy evolution depends on connecting large-scale structures determined by the [Lambda]CDM model with, at minimum, the small-scale physics of gas, star formation, and stellar feedback. Formation of galaxies within dark matter halos is sensitive to the physical phenomena occurring within and around the halo. This is especially true for dwarf galaxies, which have smaller potential wells and are more susceptible to the effects of tidal stripping and gas ionization and removal than larger galaxies. At dwarf galaxies scales comparisons of dark matter-only simulations with observations has unveiled various differences such as the core-cusp, the missing satellites, and the too big to fail problems. We have run suites of collisionless and hydrodynamical simulations of dwarf galaxies evolution in massive host environments to address these issues. We performed controlled, numerical simulations, which mimic the effects of baryons, in order to examine the assumptions implicitly made by dark matter-only simulations. The too big to fail problem is due to the overabundance of relatively massive, dense satellite galaxies found in simulations of Milky Way-like environments. We found that the removal of a small baryonic component from the central region of forming dwarf spheroidal galaxies and the inclusion of a disk component in the host galaxy can substantially reduce the central dark matter density of satellites, bringing simulations and observations of satellites into agreement. Additionally, we studied hydrodynamical simulations of massive host galaxies and their surrounding dwarf galaxy populations. The VELA simulation suite of cosmological zoom-in simulations is run with the ART code, stochastic star formation, and stellar feedback (supernovae feedback, stellar winds, radiation pressure, and photoionization pressure). The suite includes host galaxies with M[subscript vir](z = 0 ) = 1011 - 1012 M[sol] and their satellite dwarf galaxies and local isolated dwarf galaxies around each primary galaxy. We found that the inclusion of these relevant physical processes aligned the velocity functions and star formation histories of the dwarf galaxy populations closer to observations of the Local Group dwarf galaxies. By reproducing observations of dwarf galaxies we show how the inclusion of baryons in simulations relieves many of the discovered tensions between dark matter-only simulations and observations.
Author : Kenneth Freeman
Publisher : Springer
ISBN 13 : 3319106147
Total Pages : 510 pages
Book Rating : 4.3/5 (191 download)
Download or read book Lessons from the Local Group written by Kenneth Freeman and published by Springer. This book was released on 2014-11-13 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our understanding of galaxy formation comes mostly from two sources: sensitive observations at high angular resolution of the high-redshift Universe, where galaxies are observed to be forming, and detailed observations of individual stars and clouds in the Local Group, where telltale remnants from its formative time remain and similar processes operate at a low level today. The current conference focusses on key aspects of the Local Group, composed of the Milky Way, Andromeda and Triangulum Spiral Galaxies, the Large and Small Magellanic Cloud galaxies, numerous dwarf and irregular galaxies, and intergalactic gas. Topics include the halo and thick disk of the Milky Way with its first stars and stellar streams; the Milky Way bar, bulge and outer edge; interstellar dust and turbulence; star formation processes and stellar scattering in spiral arms; views through the infrared Eyes of the Spitzer Space Telescope; globular clusters; the Local Gould Belt; stellar metallicities and elemental abundances; the environment and black hole in the Milky Way nucleus; orbits of the Magellanic Clouds and galaxy dwarfs; interstellar dust and turbulence; the outer disks and halos of the Andromeda and Triangulum galaxies; ripples from a collision in Andromeda; and arcs of carbon stars in the Triangulum and intergalactic clouds. This volume also discusses surveys of planetary nebulae, galaxy morphology at low and high redshift, cosmic evolution of star and galaxy formation and gas accretion, Lyman alpha emitting galaxies, ultra-low surface brightness imaging, and more. Readers are given a clear and comprehensive view of this wide range of topics written by specialists in each field. This is the proceedings of an International Conference at the Seychelles archipelago in May 2014, on the occasion of the 60th birthday of David Block and the millionth (base two) birthday of Bruce Elmegreen.
Author : David Martínez-Delgado
Publisher : Cambridge University Press
ISBN 13 : 1107023807
Total Pages : 250 pages
Book Rating : 4.1/5 (7 download)
Download or read book Local Group Cosmology written by David Martínez-Delgado and published by Cambridge University Press. This book was released on 2013-10-21 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aimed at graduate students and young researchers, this volume presents observational techniques, tools, and models for studying Local Group galaxies.
Author : Space Telescope Science Institute (U.S.). Symposium
Publisher : Cambridge University Press
ISBN 13 : 9780521847599
Total Pages : 248 pages
Book Rating : 4.8/5 (475 download)
Download or read book The Local Group as an Astrophysical Laboratory written by Space Telescope Science Institute (U.S.). Symposium and published by Cambridge University Press. This book was released on 2006-05-04 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publisher description
Author : Edwin Powell Hubble
Publisher : Yale University Press
ISBN 13 : 9780300025002
Total Pages : 264 pages
Book Rating : 4.0/5 (25 download)
Download or read book The Realm of the Nebulae written by Edwin Powell Hubble and published by Yale University Press. This book was released on 1982-01-01 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: No modern astronomer made a more profound contribution to our understanding of the cosmos than did Edwin Hubble, who first conclusively demonstrated that the universe is expanding. Basing his theory on the observation of the change in distanct galaxies, called red shift, Hubble showed that this is a Doppler effect, or alteration in the wavelength of light, resulting from the rapid motion of celestial objects away from Earth. In 1935, Hubble described his principal observations and conclusions in the Silliman lectures at Yale University. These lectures were published the following year as "The Realm of the Nebulae," which quickly became a classic work.
