Cosmology from Antarctica
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UNIVERSIT`A DEGLI STUDI DI TRIESTE Using Hydrodynamical
UNIVERSITA` DEGLI STUDI DI TRIESTE Facolt`adi Scienze Matematiche, Fisiche e Naturali Dottorato di Ricerca in Fisica - XX Ciclo Using hydrodynamical simulations to combine Sunyaev–Zeldovich and X–ray studies of galaxy clusters DOTTORANDA COORDINATORE DEL COLLEGIO DEI DOCENTI Silvia Ameglio Chiar.mo Prof. Gaetano Senatore, Universit`adi Trieste TUTORE Chiar.mo Prof. Stefano Borgani, Universit`adi Trieste RELATORE Chiar.mo Prof. Stefano Borgani, Universit`adi Trieste a.a. 2006/2007 Contents 1 Introduction 1 2 Clusters of galaxies: an overview 5 2.1 X–rayemission ................................. 6 2.2 The Sunyaev–Zeldovich effect (SZ) . ... 8 2.2.1 The thermal Sunyaev–Zeldovich effect (tSZ) . .... 8 2.2.2 The kinetic Sunyaev–Zeldovich effect . 11 2.3 Statusofobservations . .. .. .. .. .. .. .. .. 11 2.3.1 X–rays.................................. 11 2.3.2 The Sunyaev–Zeldovich effect . 17 2.4 Cosmology with galaxy clusters . 23 2.5 Conclusions ................................... 29 3 Hydrodynamical simulations of galaxy clusters 31 3.1 The gravitational dynamics: the N–body TREE code . ...... 31 3.2 The gas physics: Smoothed Particle Hydrodynamics (SPH) ........ 33 3.3 Thesetofsimulatedclusters . 35 3.3.1 Thermal processes in the IntraCluster Medium (ICM) . ..... 38 3.3.2 The sample of simulated clusters . 40 3.3.3 Generation of tSZ, X–ray and temperature maps . 41 3.4 Definitionsoftemperature. 45 4 The angular diameter distance measurement 51 4.1 The polytropic β–model ............................ 53 4.2 DA from combined X-ray and tSZ observations . 53 4.3 Results...................................... 55 4.3.1 Resultsfromtheisothermalmodel . 55 4.3.2 Resultsfromthepolytropicfit . 57 4.3.3 Implications for cosmological parameters . ...... 60 4.4 Conclusions .................................. -
Office of Polar Programs
DEVELOPMENT AND IMPLEMENTATION OF SURFACE TRAVERSE CAPABILITIES IN ANTARCTICA COMPREHENSIVE ENVIRONMENTAL EVALUATION DRAFT (15 January 2004) FINAL (30 August 2004) National Science Foundation 4201 Wilson Boulevard Arlington, Virginia 22230 DEVELOPMENT AND IMPLEMENTATION OF SURFACE TRAVERSE CAPABILITIES IN ANTARCTICA FINAL COMPREHENSIVE ENVIRONMENTAL EVALUATION TABLE OF CONTENTS 1.0 INTRODUCTION....................................................................................................................1-1 1.1 Purpose.......................................................................................................................................1-1 1.2 Comprehensive Environmental Evaluation (CEE) Process .......................................................1-1 1.3 Document Organization .............................................................................................................1-2 2.0 BACKGROUND OF SURFACE TRAVERSES IN ANTARCTICA..................................2-1 2.1 Introduction ................................................................................................................................2-1 2.2 Re-supply Traverses...................................................................................................................2-1 2.3 Scientific Traverses and Surface-Based Surveys .......................................................................2-5 3.0 ALTERNATIVES ....................................................................................................................3-1 -
Measurement of the Cosmic Microwave Background Polarization with the BICEP Telescope at the South Pole
UC Berkeley UC Berkeley Electronic Theses and Dissertations Title Measurement of the Cosmic Microwave Background Polarization with the BICEP Telescope at the South Pole Permalink https://escholarship.org/uc/item/6b98h32b Author Takahashi, Yuki David Publication Date 2010 Peer reviewed|Thesis/dissertation eScholarship.org Powered by the California Digital Library University of California Measurement of the Cosmic Microwave Background Polarization with the Bicep Telescope at the South Pole by Yuki David Takahashi A dissertation submitted in partial satisfaction of the requirements for the degree of Doctor of Philosophy in Physics in the Graduate Division of the University of California, Berkeley Committee in charge: Professor William L. Holzapfel, Chair Professor Adrian T. Lee Professor Chung-Pei Ma Fall 2010 Measurement of the Cosmic Microwave Background Polarization with the Bicep Telescope at the South Pole Copyright 2010 by Yuki David Takahashi 1 Abstract Measurement of the Cosmic Microwave Background Polarization with the Bicep Telescope at the South Pole by Yuki David Takahashi Doctor of Philosophy in Physics University of California, Berkeley Professor William L. Holzapfel, Chair The question of how exactly the universe began is the motivation for this work. Based on the discoveries of the cosmic expansion and of the cosmic microwave background (CMB) ra- diation, humans have learned of the Big Bang origin of the universe. However, what exactly happened in the first moments of the Big Bang? A scenario of initial exponential expansion called “inflation” was proposed in the 1980s, explaining several important mysteries about the universe. Inflation would have generated gravitational waves that would have left a unique imprint in the polarization of the CMB. -
Texts G7 Sout Pole Expeditions
READING CLOSELY GRADE 7 UNIT TEXTS AUTHOR DATE PUBLISHER L NOTES Text #1: Robert Falcon Scott and Roald Amundsen (Photo Collages) Scott Polar Research Inst., University of Cambridge - Two collages combine pictures of the British and the Norwegian Various NA NA National Library of Norway expeditions, to support examining and comparing visual details. - Norwegian Polar Institute Text #2: The Last Expedition, Ch. V (Explorers Journal) Robert Falcon Journal entry from 2/2/1911 presents Scott’s almost poetic 1913 Smith Elder 1160L Scott “impressions” early in his trip to the South Pole. Text #3: Roald Amundsen South Pole (Video) Viking River Combines images, maps, text and narration, to present a historical NA Viking River Cruises NA Cruises narrative about Amundsen and the Great Race to the South Pole. Text #4: Scott’s Hut & the Explorer’s Heritage of Antarctica (Website) UNESCO World Google Cultural Website allows students to do a virtual tour of Scott’s Antarctic hut NA NA Wonders Project Institute and its surrounding landscape, and links to other resources. Text #5: To Build a Fire (Short Story) The Century Excerpt from the famous short story describes a man’s desperate Jack London 1908 920L Magazine attempts to build a saving =re after plunging into frigid water. Text #6: The North Pole, Ch. XXI (Historical Narrative) Narrative from the =rst man to reach the North Pole describes the Robert Peary 1910 Frederick A. Stokes 1380L dangers and challenges of Arctic exploration. Text #7: The South Pole, Ch. XII (Historical Narrative) Roald Narrative recounts the days leading up to Amundsen’s triumphant 1912 John Murray 1070L Amundsen arrival at the Pole on 12/14/1911 – and winning the Great Race. -
2006-2007 Science Planning Summaries
Project Indexes Find information about projects approved for the 2006-2007 USAP field season using the available indexes. Project Web Sites Find more information about 2006-2007 USAP projects by viewing project web sites. More Information Additional information pertaining to the 2006-2007 Field Season. Home Page Station Schedules Air Operations Staffed Field Camps Event Numbering System 2006-2007 USAP Field Season Project Indexes Project Indexes Find information about projects approved for the 2006-2007 USAP field season using the USAP Program Indexes available indexes. Aeronomy and Astrophysics Dr. Bernard Lettau, Program Director (acting) Project Web Sites Biology and Medicine Dr. Roberta Marinelli, Program Director Find more information about 2006-2007 USAP projects by Geology and Geophysics viewing project web sites. Dr. Thomas Wagner, Program Director Glaciology Dr. Julie Palais, Program Director More Information Ocean and Climate Systems Additional information pertaining Dr. Bernhard Lettau, Program Director to the 2006-2007 Field Season. Artists and Writers Home Page Ms. Kim Silverman, Program Director Station Schedules USAP Station and Vessel Indexes Air Operations Staffed Field Camps Amundsen-Scott South Pole Station Event Numbering System McMurdo Station Palmer Station RVIB Nathaniel B. Palmer ARSV Laurence M. Gould Special Projects Principal Investigator Index Deploying Team Members Index Institution Index Event Number Index Technical Event Index Project Web Sites 2006-2007 USAP Field Season Project Indexes Project Indexes Find information about projects approved for the 2006-2007 USAP field season using the Project Web Sites available indexes. Principal Investigator/Link Event No. Project Title Aghion, Anne W-218-M Works and days: An antarctic Project Web Sites chronicle Find more information about 2006-2007 USAP projects by Ainley, David B-031-M Adélie penguin response to viewing project web sites. -
Integrated Sachs Wolfe Effect and Rees Sciama Effect
Prog. Theor. Exp. Phys. 2012, 00000 (24 pages) DOI: 10.1093/ptep/0000000000 Integrated Sachs Wolfe Effect and Rees Sciama Effect Atsushi J. Nishizawa1 1 Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), The University of Tokyo, Chiba 277-8582, Japan ∗E-mail: [email protected] ............................................................................... It has been around fifty years since R. K. Sachs and A. M. Wolfe predicted the existence of anisotropy in the Cosmic Microwave Background (CMB) and ten years since the integrated Sachs Wolfe effect (ISW) was first detected observationally. The ISW effect provides us with a unique probe of the accelerating expansion of the Universe. The cross-correlation between the large-scale structure and CMB has been the most promising way to extract the ISW effect from the data. In this article, we review the physics of the ISW effect and summarize recent observational results and interpretations. ................................................................................................. Subject Index Cosmological perturbation theory, Cosmic background radiations, Dark energy and dark matter 1. Overview After the discovery of the isotropic radiation of the Cosmic Microwave Background (CMB) of the Universe by A. A. Penzias and R. W. Wilson in 1965 [100], R. K. Sachs and A. M Wolfe predict the existence of anisotropy in the CMB associated with the gravitational redshift in 1967 [116]. They fully integrate the geodesic equation in a perturbed Friedman-Robertson-Walker (FRW) metric in the fully general relativistic framework. The Sachs-Wolfe (SW) is the first paper that predicts the presence of the anisotropy in the CMB which now plays an important role for constraining cosmo- logical models, the nature of dark energy, modified gravity, and non-Gaussianity of the primordial fluctuation. -
CMB Telescopes and Optical Systems to Appear In: Planets, Stars and Stellar Systems (PSSS) Volume 1: Telescopes and Instrumentation
CMB Telescopes and Optical Systems To appear in: Planets, Stars and Stellar Systems (PSSS) Volume 1: Telescopes and Instrumentation Shaul Hanany ([email protected]) University of Minnesota, School of Physics and Astronomy, Minneapolis, MN, USA, Michael Niemack ([email protected]) National Institute of Standards and Technology and University of Colorado, Boulder, CO, USA, and Lyman Page ([email protected]) Princeton University, Department of Physics, Princeton NJ, USA. March 26, 2012 Abstract The cosmic microwave background radiation (CMB) is now firmly established as a funda- mental and essential probe of the geometry, constituents, and birth of the Universe. The CMB is a potent observable because it can be measured with precision and accuracy. Just as importantly, theoretical models of the Universe can predict the characteristics of the CMB to high accuracy, and those predictions can be directly compared to observations. There are multiple aspects associated with making a precise measurement. In this review, we focus on optical components for the instrumentation used to measure the CMB polarization and temperature anisotropy. We begin with an overview of general considerations for CMB ob- servations and discuss common concepts used in the community. We next consider a variety of alternatives available for a designer of a CMB telescope. Our discussion is guided by arXiv:1206.2402v1 [astro-ph.IM] 11 Jun 2012 the ground and balloon-based instruments that have been implemented over the years. In the same vein, we compare the arc-minute resolution Atacama Cosmology Telescope (ACT) and the South Pole Telescope (SPT). CMB interferometers are presented briefly. We con- clude with a comparison of the four CMB satellites, Relikt, COBE, WMAP, and Planck, to demonstrate a remarkable evolution in design, sensitivity, resolution, and complexity over the past thirty years. -
Federal Register/Vol. 84, No. 78/Tuesday, April 23, 2019/Rules
Federal Register / Vol. 84, No. 78 / Tuesday, April 23, 2019 / Rules and Regulations 16791 U.S.C. 3501 et seq., nor does it require Agricultural commodities, Pesticides SUPPLEMENTARY INFORMATION: The any special considerations under and pests, Reporting and recordkeeping Antarctic Conservation Act of 1978, as Executive Order 12898, entitled requirements. amended (‘‘ACA’’) (16 U.S.C. 2401, et ‘‘Federal Actions to Address Dated: April 12, 2019. seq.) implements the Protocol on Environmental Justice in Minority Environmental Protection to the Richard P. Keigwin, Jr., Populations and Low-Income Antarctic Treaty (‘‘the Protocol’’). Populations’’ (59 FR 7629, February 16, Director, Office of Pesticide Programs. Annex V contains provisions for the 1994). Therefore, 40 CFR chapter I is protection of specially designated areas Since tolerances and exemptions that amended as follows: specially managed areas and historic are established on the basis of a petition sites and monuments. Section 2405 of under FFDCA section 408(d), such as PART 180—[AMENDED] title 16 of the ACA directs the Director the tolerance exemption in this action, of the National Science Foundation to ■ do not require the issuance of a 1. The authority citation for part 180 issue such regulations as are necessary proposed rule, the requirements of the continues to read as follows: and appropriate to implement Annex V Regulatory Flexibility Act (5 U.S.C. 601 Authority: 21 U.S.C. 321(q), 346a and 371. to the Protocol. et seq.) do not apply. ■ 2. Add § 180.1365 to subpart D to read The Antarctic Treaty Parties, which This action directly regulates growers, as follows: includes the United States, periodically food processors, food handlers, and food adopt measures to establish, consolidate retailers, not States or tribes. -
The Design of the Ali CMB Polarization Telescope Receiver
The design of the Ali CMB Polarization Telescope receiver M. Salatinoa,b, J.E. Austermannc, K.L. Thompsona,b, P.A.R. Aded, X. Baia,b, J.A. Beallc, D.T. Beckerc, Y. Caie, Z. Changf, D. Cheng, P. Chenh, J. Connorsc,i, J. Delabrouillej,k,e, B. Doberc, S.M. Duffc, G. Gaof, S. Ghoshe, R.C. Givhana,b, G.C. Hiltonc, B. Hul, J. Hubmayrc, E.D. Karpela,b, C.-L. Kuoa,b, H. Lif, M. Lie, S.-Y. Lif, X. Lif, Y. Lif, M. Linkc, H. Liuf,m, L. Liug, Y. Liuf, F. Luf, X. Luf, T. Lukasc, J.A.B. Matesc, J. Mathewsonn, P. Mauskopfn, J. Meinken, J.A. Montana-Lopeza,b, J. Mooren, J. Shif, A.K. Sinclairn, R. Stephensonn, W. Sunh, Y.-H. Tsengh, C. Tuckerd, J.N. Ullomc, L.R. Valec, J. van Lanenc, M.R. Vissersc, S. Walkerc,i, B. Wange, G. Wangf, J. Wango, E. Weeksn, D. Wuf, Y.-H. Wua,b, J. Xial, H. Xuf, J. Yaoo, Y. Yaog, K.W. Yoona,b, B. Yueg, H. Zhaif, A. Zhangf, Laiyu Zhangf, Le Zhango,p, P. Zhango, T. Zhangf, Xinmin Zhangf, Yifei Zhangf, Yongjie Zhangf, G.-B. Zhaog, and W. Zhaoe aStanford University, Stanford, CA 94305, USA bKavli Institute for Particle Astrophysics and Cosmology, Stanford, CA 94305, USA cNational Institute of Standards and Technology, Boulder, CO 80305, USA dCardiff University, Cardiff CF24 3AA, United Kingdom eUniversity of Science and Technology of China, Hefei 230026 fInstitute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 gNational Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 hNational Taiwan University, Taipei 10617 iUniversity of Colorado Boulder, Boulder, CO 80309, USA jIN2P3, CNRS, Laboratoire APC, Universit´ede Paris, 75013 Paris, France kIRFU, CEA, Universit´eParis-Saclay, 91191 Gif-sur-Yvette, France lBeijing Normal University, Beijing 100875 mAnhui University, Hefei 230039 nArizona State University, Tempe, AZ 85004, USA oShanghai Jiao Tong University, Shanghai 200240 pSun Yat-Sen University, Zhuhai 519082 ABSTRACT Ali CMB Polarization Telescope (AliCPT-1) is the first CMB degree-scale polarimeter to be deployed on the Tibetan plateau at 5,250 m above sea level. -
UC Berkeley UC Berkeley Electronic Theses and Dissertations
UC Berkeley UC Berkeley Electronic Theses and Dissertations Title The South Pole Telescope bolometer array and the measurement of secondary Cosmic Microwave Background anisotropy at small angular scales Permalink https://escholarship.org/uc/item/2z74c4rc Author Shirokoff, Erik D. Publication Date 2011 Peer reviewed|Thesis/dissertation eScholarship.org Powered by the California Digital Library University of California The South Pole Telescope bolometer array and the measurement of secondary Cosmic Microwave Background anisotropy at small angular scales by Erik D. Shirokoff A dissertation submitted in partial satisfaction of the requirements for the degree of Doctor of Philosophy in Physics in the Graduate Division of the University of California, Berkeley Committee in charge: Professor William Holzapfel, Chair Professor Bernard Sadoulet Professor Chung-Pei Ma Fall 2011 The South Pole Telescope bolometer array and the measurement of secondary Cosmic Microwave Background anisotropy at small angular scales Copyright 2011 by Erik D. Shirokoff 1 Abstract The South Pole Telescope bolometer array and the measurement of secondary Cosmic Microwave Background anisotropy at small angular scales by Erik D. Shirokoff Doctor of Philosophy in Physics University of California, Berkeley Professor William Holzapfel, Chair The South Pole Telescope (SPT) is a dedicated 10-meter diameter telescope optimized for mm-wavelength surveys of the Cosmic Microwave Background (CMB) with arcminute reso- lution. The first instrument deployed at SPT features a 960 element -
Living and Working at USAP Facilities
Chapter 6: Living and Working at USAP Facilities CHAPTER 6: Living and Working at USAP Facilities McMurdo Station is the largest station in Antarctica and the southermost point to which a ship can sail. This photo faces south, with sea ice in front of the station, Observation Hill to the left (with White Island behind it), Minna Bluff and Black Island in the distance to the right, and the McMurdo Ice Shelf in between. Photo by Elaine Hood. USAP participants are required to put safety and environmental protection first while living and working in Antarctica. Extra individual responsibility for personal behavior is also expected. This chapter contains general information that applies to all Antarctic locations, as well as information specific to each station and research vessel. WORK REQUIREMENT At Antarctic stations and field camps, the work week is 54 hours (nine hours per day, Monday through Saturday). Aboard the research vessels, the work week is 84 hours (12 hours per day, Monday through Sunday). At times, everyone may be expected to work more hours, assist others in the performance of their duties, and/or assume community-related job responsibilities, such as washing dishes or cleaning the bathrooms. Due to the challenges of working in Antarctica, no guarantee can be made regarding the duties, location, or duration of work. The objective is to support science, maintain the station, and ensure the well-being of all station personnel. SAFETY The USAP is committed to safe work practices and safe work environments. There is no operation, activity, or research worth the loss of life or limb, no matter how important the future discovery may be, and all proactive safety measures shall be taken to ensure the protection of participants. -
Cosmic Microwave Background
1 29. Cosmic Microwave Background 29. Cosmic Microwave Background Revised August 2019 by D. Scott (U. of British Columbia) and G.F. Smoot (HKUST; Paris U.; UC Berkeley; LBNL). 29.1 Introduction The energy content in electromagnetic radiation from beyond our Galaxy is dominated by the cosmic microwave background (CMB), discovered in 1965 [1]. The spectrum of the CMB is well described by a blackbody function with T = 2.7255 K. This spectral form is a main supporting pillar of the hot Big Bang model for the Universe. The lack of any observed deviations from a 7 blackbody spectrum constrains physical processes over cosmic history at redshifts z ∼< 10 (see earlier versions of this review). Currently the key CMB observable is the angular variation in temperature (or intensity) corre- lations, and to a growing extent polarization [2–4]. Since the first detection of these anisotropies by the Cosmic Background Explorer (COBE) satellite [5], there has been intense activity to map the sky at increasing levels of sensitivity and angular resolution by ground-based and balloon-borne measurements. These were joined in 2003 by the first results from NASA’s Wilkinson Microwave Anisotropy Probe (WMAP)[6], which were improved upon by analyses of data added every 2 years, culminating in the 9-year results [7]. In 2013 we had the first results [8] from the third generation CMB satellite, ESA’s Planck mission [9,10], which were enhanced by results from the 2015 Planck data release [11, 12], and then the final 2018 Planck data release [13, 14]. Additionally, CMB an- isotropies have been extended to smaller angular scales by ground-based experiments, particularly the Atacama Cosmology Telescope (ACT) [15] and the South Pole Telescope (SPT) [16].