Astrophysics Science Division Annual Report 2009

Total Page:16

File Type:pdf, Size:1020Kb

Astrophysics Science Division Annual Report 2009 NASA/TM–2010-215853 The Astrophysics Science Division Annual Report 2009 William Oegerle and Francis Reddy, Editors Pat Tyler, Graphical Editor March 2010 The NASA STI Program Offi ce … in Profi le Since its founding, NASA has been ded i cated to the • CONFERENCE PUBLICATION. Collected ad vancement of aeronautics and space science. The pa pers from scientifi c and technical conferences, NASA Sci en tifi c and Technical Information (STI) symposia, sem i nars, or other meetings spon sored Pro gram Offi ce plays a key part in helping NASA or co spon sored by NASA. maintain this impor tant role. • SPECIAL PUBLICATION. Scientifi c, tech ni cal, The NASA STI Program Offi ce is operated by or historical information from NASA pro grams, Langley Research Center, the lead center for projects, and mission, often concerned with sub- NASAʼs scientifi c and technical in for ma tion. The jects having substan tial public interest. NASA STI Program Offi ce pro vides ac cess to the NASA STI Database, the largest collec tion of • TECHNICAL TRANSLATION. En glish-language aero nau ti cal and space science STI in the world. trans la tions of foreign scien tifi c and tech ni cal ma- The Pro gram Offi ce is also NASAʼs in sti tu tion al terial pertinent to NASAʼs mis sion. mecha nism for dis sem i nat ing the results of its research and devel op ment activ i ties. These results Specialized services that complement the STI Pro- are published by NASA in the NASA STI Report gram Offi ceʼs diverse offerings include cre at ing Series, which includes the following report types: custom thesau ri, building customized data bas es, organizing and publish ing research results . even • TECHNICAL PUBLICATION. Reports of pro vid ing videos. com pleted research or a major signifi cant phase of research that present the results of NASA pro- For more information about the NASA STI Pro gram grams and include exten sive data or theo ret i cal Offi ce, see the following: analysis. Includes compi la tions of sig nifi cant • Access the NASA STI Program Home Page at scientifi c and technical data and in for ma tion http://www.sti.nasa.gov/STI-homepage.html deemed to be of continu ing ref er ence value. NASAʼs counterpart of peer-re viewed formal • E-mail your question via the Internet to pro fes sion al papers but has less stringent limi ta - [email protected] tions on manuscript length and extent of graphic pre sen ta tions. • Fax your question to the NASA Access Help Desk at (443) 757-5803 • TECHNICAL MEMORANDUM. Scientifi c and techni cal fi ndings that are pre lim i nary or of • Telephone the NASA Access Help Desk at (443) spe cialized interest, e.g., quick release reports, 757-5802 working papers, and bib li og ra phies that contain • Write to: minimal annotation. Does not contain extensive NASA Access Help Desk analysis. NASA Center for AeroSpace In for ma tion • CONTRACTOR REPORT. Scientifi c and techni- 7115 Standard Drive cal fi ndings by NASA-sponsored con trac tors and Hanover, MD 21076 grantees. NASA/TM-2010-215853 The Astrophysics Science Division Annual Report 2009 William Oegerle NASA Goddard Space Flight Center, Greenbelt, Maryland Francis Reddy SP Systems, Inc., Greenbelt, Maryland Pat Tyler, Graphical Editor SP Systems, Inc., Greenbelt, Maryland National Aeronautics and Space Administration Goddard Space Flight Center Greenbelt, Maryland 20771 March 2010 Available from: NASA Center for AeroSpace Information National Technical Information Service 7115 Standard Drive 5285 Port Royal Road Hanover, MD 21076-1320 Springfield, VA 22161 Astrophysics Science Division: Research and Missions Contents Introduction ....................................................................................................................................1 I. 2009: Year in Review ...............................................................................................................3 II. Research .................................................................................................................................5 The Persistent Gamma-ray Sky .........................................................................................5 The Transient Gamma-ray Sky ..........................................................................................6 Pulsar Discoveries with Fermi ...........................................................................................7 Observable Signatures of Merging Black Holes ................................................................8 NGC 5408 and the Case for Middleweight Black Holes ....................................................9 Solar Wind Charge Exchange X-ray Emission ................................................................11 Number Counts of Far-Ultraviolet Galaxies .....................................................................13 MCW 419 and the Keck Interferometer ...........................................................................14 Eta Carinae: A Rosetta Stone or an Exception? ..............................................................15 Earth as an Extrasolar Planet ..........................................................................................17 III. Awards ...................................................................................................................................19 IV. Research and Development ..................................................................................................21 Suborbital Projects ................................................................................................................21 Balloon-borne Experiment with a Superconducting Spectrometer (BESS) .....................21 Super Trans-Iron Galactic Element Recorder (Super-TIGER) .........................................22 Cosmic Ray Energetics and Mass (CREAM) ..................................................................22 X-ray Quantum Calorimeter (XQC) and Micro-X .............................................................23 Proto-EXIST .....................................................................................................................25 Gamma-Ray Burst Polarimeter ........................................................................................25 X-ray Advanced Concepts Testbed (XACT) .....................................................................27 Primordial Inflation Polarization Explorer ........................................................................28 Technology Development ......................................................................................................29 High-energy Laboratory Astrophysics Using an X-Ray Microcalorimeter with an Electron Beam Ion Trap .......................................................................................29 X-ray Calorimeter Development ......................................................................................31 X-ray Mirror Development: IXO and NuSTAR .................................................................32 Coded-Mask and CdZnTe Detector Development ..........................................................33 Phase Fresnel Lens Development for X-ray & Gamma-ray Astronomy ..........................33 Far-Infrared Detectors .....................................................................................................34 Variable-delay Polarization Modulators for Exploring Inflation .........................................35 MKID Detectors for Submillimeter Astronomy .................................................................36 Technology Development for Space-Based Imaging Interferometers .............................37 Wide-field Imaging Interferometry Testbed ......................................................................39 Technology Development for LISA...................................................................................40 Three-Dimensional Track Imager Detector for Gamma-ray and Neutron Imaging ..........42 Photon Counter Detector Development ...........................................................................43 V. Projects ..................................................................................................................................45 Projects in Operation .............................................................................................................45 The Fermi Gamma-ray Space Telescope ........................................................................45 The Rossi X-ray Timing Explorer .....................................................................................46 XMM-Newton Guest Observer Facility ............................................................................47 Swift .................................................................................................................................48 Suzaku (Astro-E2) ..........................................................................................................49 INTEGRAL .......................................................................................................................50 v Astrophysics Science Division: Research and Missions Hubble Space Telescope: SM4 and Wide Field Camera 3 ..............................................51 The Galaxy Evolution Explorer (GALEX) .........................................................................55 High Energy Astrophysics Science Archival Research Center (HEASARC) ...................57 Wilkinson Microwave Anisotropy Probe (WMAP) ............................................................60
Recommended publications
  • Information Summaries
    TIROS 8 12/21/63 Delta-22 TIROS-H (A-53) 17B S National Aeronautics and TIROS 9 1/22/65 Delta-28 TIROS-I (A-54) 17A S Space Administration TIROS Operational 2TIROS 10 7/1/65 Delta-32 OT-1 17B S John F. Kennedy Space Center 2ESSA 1 2/3/66 Delta-36 OT-3 (TOS) 17A S Information Summaries 2 2 ESSA 2 2/28/66 Delta-37 OT-2 (TOS) 17B S 2ESSA 3 10/2/66 2Delta-41 TOS-A 1SLC-2E S PMS 031 (KSC) OSO (Orbiting Solar Observatories) Lunar and Planetary 2ESSA 4 1/26/67 2Delta-45 TOS-B 1SLC-2E S June 1999 OSO 1 3/7/62 Delta-8 OSO-A (S-16) 17A S 2ESSA 5 4/20/67 2Delta-48 TOS-C 1SLC-2E S OSO 2 2/3/65 Delta-29 OSO-B2 (S-17) 17B S Mission Launch Launch Payload Launch 2ESSA 6 11/10/67 2Delta-54 TOS-D 1SLC-2E S OSO 8/25/65 Delta-33 OSO-C 17B U Name Date Vehicle Code Pad Results 2ESSA 7 8/16/68 2Delta-58 TOS-E 1SLC-2E S OSO 3 3/8/67 Delta-46 OSO-E1 17A S 2ESSA 8 12/15/68 2Delta-62 TOS-F 1SLC-2E S OSO 4 10/18/67 Delta-53 OSO-D 17B S PIONEER (Lunar) 2ESSA 9 2/26/69 2Delta-67 TOS-G 17B S OSO 5 1/22/69 Delta-64 OSO-F 17B S Pioneer 1 10/11/58 Thor-Able-1 –– 17A U Major NASA 2 1 OSO 6/PAC 8/9/69 Delta-72 OSO-G/PAC 17A S Pioneer 2 11/8/58 Thor-Able-2 –– 17A U IMPROVED TIROS OPERATIONAL 2 1 OSO 7/TETR 3 9/29/71 Delta-85 OSO-H/TETR-D 17A S Pioneer 3 12/6/58 Juno II AM-11 –– 5 U 3ITOS 1/OSCAR 5 1/23/70 2Delta-76 1TIROS-M/OSCAR 1SLC-2W S 2 OSO 8 6/21/75 Delta-112 OSO-1 17B S Pioneer 4 3/3/59 Juno II AM-14 –– 5 S 3NOAA 1 12/11/70 2Delta-81 ITOS-A 1SLC-2W S Launches Pioneer 11/26/59 Atlas-Able-1 –– 14 U 3ITOS 10/21/71 2Delta-86 ITOS-B 1SLC-2E U OGO (Orbiting Geophysical
    [Show full text]
  • Stellar Clusters in Dwarf Galaxies
    A&A 448, 471–478 (2006) Astronomy DOI: 10.1051/0004-6361:20052949 & c ESO 2006 Astrophysics Stellar clusters in dwarf galaxies L. Vanzi1 and M. Sauvage2 1 European Southern Observatory, Alonso de Cordova 3107, Vitacura, Santiago, Chile e-mail: [email protected] 2 CEA/DSM/DAPNIA/Service d’Astrophysique – UMR AIM, CE Saclay, 91191 Gif-sur-Yvette Cedex, France e-mail: [email protected] Received 28 February 2005 / Accepted 13 October 2005 ABSTRACT We present new observations in the Ks (2.2 µm) and L (3.7 µm) infrared bands of a sample of blue dwarf galaxies with the larger aim of studying the population of massive stellar clusters, the occurrence of dust-embedded stellar clusters, and their properties. All Ks images show a rich population of clusters, but only a small fraction of them is bright in L.MostL sources have radio counterparts. We derived the luminosity function in Ks for the galaxies IC 4661 and NGC 5408, finding both to be consistent with those of similar galaxies. We also compared the number of clusters and their luminosities with the star-formation rate of the host galaxies and found no compelling evidence of correlation. We conclude that young clusters and embedded clusters are a common feature of blue dwarf galaxies and possibly of galaxies in general, we suggest that their occurrence is due to purely statistical effects rather than a phenomenon related to specific physical conditions. In this sense we expect these objects to be abundant at high red-shift. Key words. galaxies: dwarf – galaxies: starburst – galaxies: star clusters 1.
    [Show full text]
  • Photographs Written Historical and Descriptive
    CAPE CANAVERAL AIR FORCE STATION, MISSILE ASSEMBLY HAER FL-8-B BUILDING AE HAER FL-8-B (John F. Kennedy Space Center, Hanger AE) Cape Canaveral Brevard County Florida PHOTOGRAPHS WRITTEN HISTORICAL AND DESCRIPTIVE DATA HISTORIC AMERICAN ENGINEERING RECORD SOUTHEAST REGIONAL OFFICE National Park Service U.S. Department of the Interior 100 Alabama St. NW Atlanta, GA 30303 HISTORIC AMERICAN ENGINEERING RECORD CAPE CANAVERAL AIR FORCE STATION, MISSILE ASSEMBLY BUILDING AE (Hangar AE) HAER NO. FL-8-B Location: Hangar Road, Cape Canaveral Air Force Station (CCAFS), Industrial Area, Brevard County, Florida. USGS Cape Canaveral, Florida, Quadrangle. Universal Transverse Mercator Coordinates: E 540610 N 3151547, Zone 17, NAD 1983. Date of Construction: 1959 Present Owner: National Aeronautics and Space Administration (NASA) Present Use: Home to NASA’s Launch Services Program (LSP) and the Launch Vehicle Data Center (LVDC). The LVDC allows engineers to monitor telemetry data during unmanned rocket launches. Significance: Missile Assembly Building AE, commonly called Hangar AE, is nationally significant as the telemetry station for NASA KSC’s unmanned Expendable Launch Vehicle (ELV) program. Since 1961, the building has been the principal facility for monitoring telemetry communications data during ELV launches and until 1995 it processed scientifically significant ELV satellite payloads. Still in operation, Hangar AE is essential to the continuing mission and success of NASA’s unmanned rocket launch program at KSC. It is eligible for listing on the National Register of Historic Places (NRHP) under Criterion A in the area of Space Exploration as Kennedy Space Center’s (KSC) original Mission Control Center for its program of unmanned launch missions and under Criterion C as a contributing resource in the CCAFS Industrial Area Historic District.
    [Show full text]
  • Neutral Hydrogen in Nearby Dwarf Galaxies B¨Arbel S
    Dwarf Galaxies: From the Deep Universe to the Present Proceedings IAU Symposium No. 344, 2018 c 2018 International Astronomical Union K. McQuinn & S. Stierwalt, eds. DOI: 00.0000/X000000000000000X Neutral Hydrogen in Nearby Dwarf Galaxies B¨arbel S. Koribalski CSIRO Astronomy and Space Science, Australia Telescope National Facility PO Box 76, Epping, NSW 1710, Australia email: [email protected] Abstract. Here I briefly highlight our studies of the gas content, kinematics and star formation in nearby dwarf galaxies (D < 10 Mpc) based on the `Local Volume H i Survey' (LVHIS, Koribalski et al. 2018), which was conducted with the Australia Telescope Compact Array (ATCA). The LVHIS sample consists of nearly 100 galaxies, including new discoveries, spanning a large diversity in size, shape, mass and degree of peculiarity. The hydrogen properties of dwarf galaxies in two nearby groups, Sculptor and CenA / M83, are analysed and compared with many rather isolated dwarf galaxies. Around 10% of LVHIS galaxies are transitional or mixed-type dwarf galaxies (dIrr/dSph), the formation of which is explored. | I also provide a brief update on WALLABY Early Science, where we focus on studying the H i properties of galaxies as a function of environment. WALLABY (Dec < +30 degr, z < 0:26) is conducted with the Australian SKA Pathfinder (ASKAP), a ∼6-km diameter array of 36 × 12-m dishes, each equipped with wide-field (30 sq degr) Chequerboard Phased Array Feeds. Keywords. galaxies: kinematics and dynamics | galaxies: structure | radio lines: galaxies | surveys 1. LVHIS { The Local Volume H i Survey The LVHIS project provides high-resolution H i spectral line and 20-cm radio contin- uum data products for nearly 100 nearby galaxies, based on over 2500 hours of ATCA observations.
    [Show full text]
  • MEMORIA IAC 2013 Pero No Todo Son Balances Positivos
    MEMORIA 2013 “INSTITUTO DE ASTROFÍSICA DE CANARIAS” EDITA: Unidad de Comunicación y Cultura Científica (UC3) del Instituto de Astrofísica de Canarias (IAC) MAQUETA E IMPRIME: Printisur DEPÓSITO LEGAL: 7- PRESENTACIÓN Índice general 8- CONSORCIO PÚBLICO IAC 12- LOS OBSERVATORIOS DE CANARIAS 14- - Observatorio del Teide (OT) 15- - Observatorio del Roque de los Muchachos (ORM) 16- COMISIÓN PARA LA ASIGNACIÓN DE TIEMPO (CAT) 20- ACUERDOS 22- GRAN TELESCOPIO CANARIAS (GTC) 26- ÁREA DE INVESTIGACIÓN 29- - Estructura del Universo y Cosmología 47- - El Universo Local 80- - Física de las estrellas, Sistemas Planetarios y Medio Interestelar 107- - El Sol y el Sistema Solar 137- - Instrumentación y Espacio 161- - Otros 174- ÁREA DE INSTRUMENTACIÓN 174- - Ingeniería 188- - Producción 192- - Oficina de Proyectos Institucionales y Transferencia de Resultados de Investigación (OTRI) 201- ÁREA DE ENSEÑANZA 201- - Cursos de doctorado 203- - Seminarios científicos 207- - Coloquios 207- - Becas 209- - Tesis doctorales 209- - XXIV Escuela de Invierno: ”Aplicaciones astrofísicas de las lentes gravitatorias” 211- ADMINISTRACIÓN DE SERVICIOS GENERALES 211- - Instituto de Astrofísica 213- - Oficina Técnica para la Protección de la Calidad del Cielo (OTPC) 216- - Observatorio del Teide 216- - Observatorio del Roque de los Muchachos 217- - Centro de Astrofísica de la Palma 218- - Ejecución del Presupuesto 2013 219- GABINETE DE DIRECCIÓN 219- - Ediciones 220- - Carteles 220- - Comunicación y divulgación 232- - Web 234- - Visitas a las instalaciones del IAC 237-
    [Show full text]
  • The 13Th HEAD Program Book
    13th Meeting of the High Energy Astrophysics Division Program Book Monterey CA 7-11 April 2013 13th Meeting of the American Astronomical Society’s High Energy Astrophysics Division (HEAD) 7-11 April 2013 Monterey, California Scientific sessions will be held at the: Portola Hotel and Spa 2 Portola Plaza ATTENDEE Monterey, CA 93940 SERVICES.......... 4 HEAD Paper Sorters SCHEDULE......... 6 Keith Arnaud Joshua Bloom MONDAY............ 12 Joel Bregman Paolo Coppi Rosanne Di Stefano POSTERS........... 17 Daryl Haggard Chryssa Kouveliotou TUESDAY........... 43 Henric Krawczynski Stephen Reynolds WEDNESDAY...... 48 Randall Smith Jan Vrtilek THURSDAY......... 52 Nicholas White AUTHOR INDEX.. 56 Session Numbering Key 100’s Monday and posters NASA PCOS X-RAY SAG 200’s Tuesday 300’s Wednesday HEAD DISSERTATIONS 400’s Thursday Please Note: All posters are displayed Monday-Thursday. Current HEAD Officers Current HEAD Committee Joel Bregman Chair Daryl Haggard 2013-2016 Nicholas White Vice-Chair Henric Krawczynski 2013-2016 Randall Smith Secretary Rosanne DiStefano 2011-2014 Keith Arnaud Treasurer Stephen Reynolds 2011-2014 Megan Watzke Press Officer Jan Vrtilek 2011-2014 Chryssa Kouveliotou Past Chair Joshua Bloom 2012-2015 Paolo Coppi 2012-2015 1 2 Peter B’s Entrance Cottonwood Plaza Jacks Restaurant Brew Pub s p o h S Cottonwood Bonsai III e Lower Atrium Bonsai II ung Restrooms o e nc cks L Ironwood Redwood Bonsai I a a J Entr Elevators Elevators a l o rt o P Restrooms s De Anza De Anza p Ballroom II-III Ballroom I o De Anza Sh Foyer Upper Atrium Entrance OOMS R Entrance BONZAI Entrance De ANZA BALLROOM FA ELEVATORS TO BONZAI ROOMS Y B OB L TEL O General eANZA D A H O Z T Session ANCE R OLA PLA T ENT R PO FA FA STORAGE A UP F ENTRANCE TO 3 De ANZA FOYER ATTENDEE SERVICES Registration De Anza Foyer Sunday: 1:00pm-7:00pm Monday-Wednesday: 7:30am-6:00pm Thursday: 8:00am-5:00pm Poster Viewing Monday-Wednesday: 7:30am-6:45pm Thursday: 7:30am-5:00pm Please do not leave personal items unattended.
    [Show full text]
  • <> CRONOLOGIA DE LOS SATÉLITES ARTIFICIALES DE LA
    1 SATELITES ARTIFICIALES. Capítulo 5º Subcap. 10 <> CRONOLOGIA DE LOS SATÉLITES ARTIFICIALES DE LA TIERRA. Esta es una relación cronológica de todos los lanzamientos de satélites artificiales de nuestro planeta, con independencia de su éxito o fracaso, tanto en el disparo como en órbita. Significa pues que muchos de ellos no han alcanzado el espacio y fueron destruidos. Se señala en primer lugar (a la izquierda) su nombre, seguido de la fecha del lanzamiento, el país al que pertenece el satélite (que puede ser otro distinto al que lo lanza) y el tipo de satélite; este último aspecto podría no corresponderse en exactitud dado que algunos son de finalidad múltiple. En los lanzamientos múltiples, cada satélite figura separado (salvo en los casos de fracaso, en que no llegan a separarse) pero naturalmente en la misma fecha y juntos. NO ESTÁN incluidos los llevados en vuelos tripulados, si bien se citan en el programa de satélites correspondiente y en el capítulo de “Cronología general de lanzamientos”. .SATÉLITE Fecha País Tipo SPUTNIK F1 15.05.1957 URSS Experimental o tecnológico SPUTNIK F2 21.08.1957 URSS Experimental o tecnológico SPUTNIK 01 04.10.1957 URSS Experimental o tecnológico SPUTNIK 02 03.11.1957 URSS Científico VANGUARD-1A 06.12.1957 USA Experimental o tecnológico EXPLORER 01 31.01.1958 USA Científico VANGUARD-1B 05.02.1958 USA Experimental o tecnológico EXPLORER 02 05.03.1958 USA Científico VANGUARD-1 17.03.1958 USA Experimental o tecnológico EXPLORER 03 26.03.1958 USA Científico SPUTNIK D1 27.04.1958 URSS Geodésico VANGUARD-2A
    [Show full text]
  • Ngc Catalogue Ngc Catalogue
    NGC CATALOGUE NGC CATALOGUE 1 NGC CATALOGUE Object # Common Name Type Constellation Magnitude RA Dec NGC 1 - Galaxy Pegasus 12.9 00:07:16 27:42:32 NGC 2 - Galaxy Pegasus 14.2 00:07:17 27:40:43 NGC 3 - Galaxy Pisces 13.3 00:07:17 08:18:05 NGC 4 - Galaxy Pisces 15.8 00:07:24 08:22:26 NGC 5 - Galaxy Andromeda 13.3 00:07:49 35:21:46 NGC 6 NGC 20 Galaxy Andromeda 13.1 00:09:33 33:18:32 NGC 7 - Galaxy Sculptor 13.9 00:08:21 -29:54:59 NGC 8 - Double Star Pegasus - 00:08:45 23:50:19 NGC 9 - Galaxy Pegasus 13.5 00:08:54 23:49:04 NGC 10 - Galaxy Sculptor 12.5 00:08:34 -33:51:28 NGC 11 - Galaxy Andromeda 13.7 00:08:42 37:26:53 NGC 12 - Galaxy Pisces 13.1 00:08:45 04:36:44 NGC 13 - Galaxy Andromeda 13.2 00:08:48 33:25:59 NGC 14 - Galaxy Pegasus 12.1 00:08:46 15:48:57 NGC 15 - Galaxy Pegasus 13.8 00:09:02 21:37:30 NGC 16 - Galaxy Pegasus 12.0 00:09:04 27:43:48 NGC 17 NGC 34 Galaxy Cetus 14.4 00:11:07 -12:06:28 NGC 18 - Double Star Pegasus - 00:09:23 27:43:56 NGC 19 - Galaxy Andromeda 13.3 00:10:41 32:58:58 NGC 20 See NGC 6 Galaxy Andromeda 13.1 00:09:33 33:18:32 NGC 21 NGC 29 Galaxy Andromeda 12.7 00:10:47 33:21:07 NGC 22 - Galaxy Pegasus 13.6 00:09:48 27:49:58 NGC 23 - Galaxy Pegasus 12.0 00:09:53 25:55:26 NGC 24 - Galaxy Sculptor 11.6 00:09:56 -24:57:52 NGC 25 - Galaxy Phoenix 13.0 00:09:59 -57:01:13 NGC 26 - Galaxy Pegasus 12.9 00:10:26 25:49:56 NGC 27 - Galaxy Andromeda 13.5 00:10:33 28:59:49 NGC 28 - Galaxy Phoenix 13.8 00:10:25 -56:59:20 NGC 29 See NGC 21 Galaxy Andromeda 12.7 00:10:47 33:21:07 NGC 30 - Double Star Pegasus - 00:10:51 21:58:39
    [Show full text]
  • Arxiv:2108.13954V1 [Hep-Ph] 31 Aug 2021
    Is backreaction in cosmology a relativistic effect? On the need for an extension of Newton’s theory to non-Euclidean topologies Quentin Vigneron1,2 1 Institute of Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Toru´n, Poland 2 Univ Lyon, Ens de Lyon, Univ Lyon1, CNRS, Centre de Recherche Astrophysique de Lyon UMR5574, F–69007, Lyon, France E-mail: [email protected], [email protected] 22 September 2021 Abstract. Cosmological backreaction corresponds to the effect of inhomogeneities of structure on the global expansion of the Universe. The main question surrounding this phenomenon is whether or not it could explain the recent acceleration of the scale factor, also known as Dark Energy. One of the most important result on this subject is the Buchert-Ehlers theorem (Buchert & Ehlers, 1997) stating that backreaction is exactly zero when calculated using Newton’s theory of gravitation, which may not be the case in general relativity. It is generally said that this result implies that backreaction is a purely relativistic effect. We will show that this is not necessarily the case, in the sense that this implication does not apply to a universe which is still well described by Newton’s theory on small scales but has a non-Euclidean topology. The theorem should therefore be generalised to account for such a scenario. In a heuristic calculation where we define a theory which is locally Newtonian but defined on a non-Euclidean topology, we show that backreaction is non-zero, meaning that it arXiv:2109.10336v1 [gr-qc] 21 Sep 2021 might be non-relativistic and might depend on the topology of our Universe.
    [Show full text]
  • 198 4Apj. . .276. .491H the Astrophysical Journal, 276:491-508
    .491H The Astrophysical Journal, 276:491-508, 1984 January 15 @ 1984. The American Astronomical Society. All rights reserved. Printed in U.S.A. .276. 4ApJ. 198 THE NGC 5128 GLOBULAR CLUSTER SYSTEM James E. Hesser,1 Hugh C. Harris, and Sidney van den Bergh1 Dominion Astrophysical Observatory, Herzberg Institute of Astrophysics AND Gretchen L. H. Harris1,2,3 University of Waterloo Received 1983 March 4; accepted 1983 July 6 ABSTRACT Of 13 visually selected globular cluster candidates observed with the SIT vidicon and Cassegrain spectrograph at the CTIO 4 m telescope in 1981, 12 are clusters with heliocentric radial velocities in the range +340 to +860 km s-1. In 1982 three additional clusters were found by spectroscopic observations of a sample of 13 objects chosen to have B—V colors in the range of the confirmed, visually selected clusters. Combining these results with observations obtained in 1980 brings to 20 the number of spectroscopically confirmed globular clusters associated with NGC 5128. From them we find the following: (1) The clusters have 17.0 < V < 18.7 and 0.71 < B—V < 1.16 mag; and, in the mean, the redder, more metal-rich clusters lie at smaller galactocentric distances than do the bluer clusters. (2) The brightest clusters are probably similar in luminosity and size to, or brighter than, co Cen, the most massive and luminous globular cluster in the Galaxy. (3) In projected distance the confirmed clusters lie between (2.9 and 35.6)(D/5) kpc from the nucleus. That is, they lie primarily outside the main body of the optical galaxy, a tendency likely to have resulted from selection effects.
    [Show full text]
  • Sports Mp3 Player Owner’S Manual Model: Mf-Fd150tb/Tn/Ts Mf-Fd150eb/En/Es
    SPORTS MP3 PLAYER OWNER’S MANUAL MODEL: MF-FD150TB/TN/TS MF-FD150EB/EN/ES Please read this manual carefully before operating your set. Retain it for future reference. Designs and specifications are subject to change without notice for improvement. Printed in Korea Contents Important Safety Instructions . .3 Before Operation . .38-39 Precautions . .4 Power on/off . .38 Battery Life . .4 To use Earphone . ..38 Hold Function . .39 Player features and controls . .5-9 To adjust Volume . .39 Accessories . .5 Top/ Front/ Bottom Panel . .6 Basic Operation . .40-41 Rear Panel/ Side Panel . .7 To play files . .40 LCD . .8 To pause files . .40 To install Battery . .9 To stop files . .40 To skip the files . .41 System Requirements . .10 To play rewind search or fast Operation Circumstances . .10 forward search the files . .41 What is “MP3 Player”? . .11-12 Advanced Operation . .42-50 What is “WMA”? . .12 Book Mark Function . .42 How to use your MP3 Player . .13 Local Repeat Function . .42 To select the MENU . .43 Installing Software . .14-15 EQUALIZE Function . .43 To install Automatically . .14 PLAY MODE Function . .44 To install Manually . .15 To select the menu language . .45 Connecting Data In/Out Cable .16 BACKLIGHT Function . .45 CONTRAST Function . .46 Using MP3 Explorer . .17-37 POWER SAVING Function . .46 Using MP3 Explorer . .17-18 To delete files on the MP3 Player .47 To format memory . .19-21 To check memory and version To download files . .22-25 information . .48 To upload files . .26-27 COUNTER Function . .48-49 To delete the files on MP3 RETURN Function .
    [Show full text]
  • Referierte Publikationen
    14 Publikationslisten Referierte Publikationen Abdo, A.A., M. Ajello, A. Allafort, …, A.W. Strong, et al.: Ogle, E. Falgarone, G. Pineaudes Forêts, E. O'Sullivan, The Second Fermi Large Area Telescope Catalog of Gam- P.-A. Duc, S. Gallagher, Y. Gao, T. Jarrett, I. Konstantopou- ma-Ray Pulsars. Ap. J. Supp. Ser. 208, 17 (2013). los, U. Lisenfeld, S. Lord, N. Lu, B.W. Peterson, C. Struck, Aceituno, J., S.F. Sánchez, F. Grupp, J. Lillo, M. Hernán- E. Sturm, R. Tuffs, I. Valchanov, P. van der Werf and K.C. Obispo, D. Benitez, L.M. Montoya, U. Thiele, S. Pedraz, Xu: Shock-enhanced C+ Emission and the Detection of H O from the Stephan's Quintet Group-wide Shock Using D. Barrado, S. Dreizler and J. Bean: CAFE: Calar Alto 2 Fiber-fed Échelle spectrograph. Astron. Astrophys. 552, Herschel. Ap. J. 777, 66 (2013). A31 (2013). Arasa, C., M.C. van Hemert, E.F. van Dishoeck and G.J. Ackermann, M., M. Ajello, A. Allafort, …, A. von Kienlin, Kroes: Molecular Dynamics Simulations of CO2 Forma- et al.: Determination of the Point-spread Function for the tion in Interstellar Ices. Journal of Physical Chemistry A Fermi Large Area Telescope from On-orbit Data and Li- 117, 7064-7074 (2013). mits on Pair Halos of Active Galactic Nuclei. Ap. J. 765, Arndt, S., E. Wacker, Y.-F. Li, T. Shimizu, H.M. Thomas, 54 (2013). G.E. Morfill, S. Karrer, J.L. Zimmermann, and A.-K. Bos- Ackermann, M., M. Ajello, A. Allafort, …, A.W. Strong, et serhoff: Cold atmospheric plasma, a new strategy to indu- al.: Detection of the Characteristic Pion-Decay Signature ce senescence in melanoma cells.
    [Show full text]