DOCSLIB.ORG

Xru2008-Abstractbook V1.4.Pdf

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Xru2008-Abstractbook V1.4.Pdf THE X-RAY UNIVERSE 2008 27 - 30 May 2008 Granada, Spain A conference organised by the XMM-Newton Science Operations Centre, European Space Astronomy Centre (ESAC), European Space Agency (ESA) ABSTRACT BOOK Oral Communications and Posters Edited by M. DIAZ TRIGO & M. EHLE with the help of B. ALTIERI, A. IBARRA, N. LOISEAU, E. OJERO, A. POLLOCK, M. SANTOS-LLEO and N. SCHARTEL Organising Committes Scientific Organising Committee: Xavier Barcons (IFCA (CSIC-UC) Santander, Spain) Chair Norbert Schartel (XMM-Newton SOC, ESA) Co-Chair Steve Allen (Stanford Uni., USA) Marc Audard (ISDC/Geneva Observatory, Switzerland) Jean Ballet (CEA Saclay, France) Thomas Boller (MPE Garching, Germany) Niel Brandt (Penn State Uni., USA) Massimo Cappi (IASF Bologna, Italy) Diana Hannikainen (TKK/Metshovi Radio Observatory, Finland) Margarida Hernanz (ICE(CSIC) & IEEC, Barcelona, Spain) Giorgio Matt (Uni. Roma Tre, Italy) Mariano M´endez (Uni. Groningen, The Netherlands) Kirpal Nandra (Imperial College London, United Kingdom) Arvind Parmar (ESTEC, ESA) Delphine Porquet (ULP Strasbourg, France) Gregor Rauw (Uni. Liege, Belgium) Tim Roberts (Durham Uni., United Kingdom) Sabine Schindler (Uni. Innsbruck, Austria) Axel Schwope (AI Potsdam, Germany) Yoshihiro Ueda (Uni. Kyoto, Japan) Jacco Vink (Uni. Utrecht, The Netherlands) Local Organising Committee: Matthias Ehle (Chair) Mar´ıa D´ıaz Trigo (Co-Chair) Bruno Altieri Michelle Arpizou Rod Bailey Carlos Gabriel Mart´ın Guerrero (IAA-CSIC) Aitor Ibarra Nora Loiseau Josefa Masegosa (IAA-CSIC) Ramon Mun~oz Eduardo Ojero Andy Pollock Mar´ıa Santos-Lle´o Richard Saxton Contents 1 Invited Speakers iii High-redshift clusters and their evolution Arnaud, M. iv X-rays in late-type stars: From present challenges to future observations Audard, M. iv Exploring the High-Redshift X-ray Universe: Snapshot to Ultradeep Surveys Brandt, W.N. v X-ray surveys of AGN : results and perspectives Comastri, A.; Gilli, R.; Vignali, C. v Feedback at work: radio sources in clusters Feretti, L. vi Planetary Nebulae in X-rays Guerrero, M.A. vi X-ray emission from Isolated Neutron Stars Haberl, F. vii Recent X-ray Results on Supernova Remnants Hughes, J.P. vii Spatial Distribution of the GCDX and its Time Variability Koyama, K. viii Outflows in AGNs: High-Resolution X-ray Spectroscopy Krongold, Y. viii The X-ray Foundation for AGN Feedback in the Radio Mode McNamara, B.R. ix The Equation of State of Neutron Stars M´endez, M. ix Accretion in Galactic X-ray sources and AGN: constraints from X-ray observations Miniutti, G. x X-ray emission from hot stars Naz´e, Y. x High resolution spectroscopy of novae and supersoft sources Ness, J.-U. xi X-ray monitoring of SgrA* Porquet, D. xi 3 Pulsar wind nebulae: The VHE - X-ray connection Puhlhofer,¨ G. xii Ultraluminous X-ray sources Roberts, T.P. xii XMM-Newton: status of the project Schartel, N. xiii XEUS Turner, M. xiii From X-ray binaries to AGN Uttley, P. xiii 2 Public Talk xv Ver lo invisible: la Agencia Espacial Europea a la caza da agujeros negros en el Universo Guainazzi, M. xvi 3 Topic 1: Stars, Star-forming Regions, Planetary and Cometary Studies 1 The ChaMP Extended Stellar Survey: Photometric and Spectroscopic Properties Agueros, M.; Covey, K.; Green, P.; Haggard, D.; Barkhouse, W.; Drake, J.; Evans, N.; Kashyap, V.; Kim, D.-W.; Pease, D.; Silverman, J. 2 The Chandra view of the T Tau binary HDE 245059 Baldovin Saavedra, C.; Audard, M.; Duchene, G.; Skinner, S.L.; Paerels, F.B.S. 2 X-ray views of the solar sytem Branduardi-Raymont, G.; Bhardwaj, A.; Elsner, R.F.; Gladstone, G R.; Rodr´ıguez, P.; Cravens, T.E.; Dennerl, K.; Ford, P.; Galand, M.; Grodent, D.; Waite, J.H. Jr 3 Identifying solar wind charge exchange emission in XMM-Newton observations Carter, J.A.; Sembay, S. 3 X-ray activity and the YSO circumstellar environment: results from DROXO Flaccomio, E.; Stelzer, B.; Sciortino, S.; Pillitteri, I.; Micela, G. 4 Young A Stars: The softest Youngsters Gun¨ ther, H.M.; Schmitt, J.H.M.M. 4 An XMM-Newton View of Westerlund 1 and the Surrounding Field Kavanagh, P.J.; Norci, L.; Meurs, E.J.A. 5 Resonance scattering in emission line profiles of ζ Puppis Leutenegger, M.A.; Cohen, D.H.; Kahn, S.M.; Owocki, S.P.; Paerels, F.B.S. 5 Hard X-ray emission from Eta Carinae & other colliding-wind binaries Leyder, J.-C.; Rauw, G.; Walter, R. 6 Coronal properties of active M dwarfs Liefke, C.; Ness, J.-U.; Schmitt, J.H.M.M. 6 New deep XMM-Newton observations to the west of the sigma Orionis cluster Lopez-Santiago, J.; Caballero, J.A. 7 Accretion and Corona: HETG Chandra observations of TW Hya. Luna, G.J.M.; Brickhouse, N.S.; Dupree, A.K. 7 High-resolution X-ray spectroscopy of stellar winds from single O-type stars Oskinova, L.M.; Waldron, W.L.; Feldmeier, A.; Cassinelli, J.P.; Hamann, W.-R. 8 Temporal and spectral study of X-ray flares: Active G-K Dwarfs Pandey, J.C. 8 X-ray properties of sources detected in the DROXO survey. Pillitteri, I.; Sciortino, S.; Flaccomio, E.; Testi, L.; Favata, F.; Giardino, G.; Micela, G.; Stelzer, B. 9 The periastron and X-ray eclipse of WR25, the most massive star in the Galaxy Pollock, A.M.T.; Corcoran, M.F. 9 2XMM Cool-Star Variability Survey: the 2XMMp/Tycho Sample Pye, J.P.; Fyfe, D.J.; Rosen, S.R.; Schroeder, A.C. 10 Analysis of the LETG spectrum of the hot star Delta Orionis Raassen, A.J.J.; Pollock, A.M.T. 10 The XMM-Newton view of the rich cluster Cyg OB2 Rauw, G.; De Becker, M.; Naz´e, Y.; Linder, N. 11 X-rays from classical T Tauri stars - Accretion and wind signatures Robrade, J.; Schmitt, J.H.M.M. 11 Suzaku observations of the accreting stars TW Hya and Su Aur Schmitt, J.H.M.M.; Robrade, J. 12 Carbon rich X-ray spectrum of a Wolf-Rayet binary θ Muscae Sugawara, Y.; Tsuboi, Y.; Maeda, Y. 12 A Survey of Orion A with XMM-Newton and Spitzer: SOXS Wolk, S.J. for the SOXS consortium . 13 Localizing a stellar X-ray flare using multi-wavelength observations Wolter, U.; Robrade, J.; Schmitt, J.H.M.M.; Ness, J.-U. 13 4 Topic 2: Interacting Binary Systems, (Galactic) Black Holes and Micro-quasars 15 A genuine new black hole candidate in the M31 globular cluster Bo 45 Barnard, R.; Stiel, H.; Kong, A.H.K.; Williams, B.; Pietsch, W.; Kolb, U.C.; Sala, G. 16 Characterization of BeX systems after 5 years of INTEGRAL Blay, P.; Miralles-Caballero, D.; Mart´ınez-Nu´nez,~ S.; Camero-Arranz, A.; Reig, P.; Reglero, V. 16 INTEGRAL view of H 0115+634: detection of a QPO Blay, P.; Miralles-Caballero, D.; Mart´ınez-Nu´nez,~ S.; Reig, P.; Reglero, V. 17 The \Big Dipper" to probe the warm absorber in X-ray binaries Boirin, L.; D´ıaz Trigo, M.; Parmar, A.; M´endez, M. 17 X-ray eclipse time delays in 4U 2129+47 Bozzo, E.; Falanga, M.; Papitto, A.; Stella, L.; Perna, R.; Lazzati, D.; Israel, G.; Campana, S.; Mangano, V.; Di Salvo, T.; Burderi, L. 18 Multiwavelength Comparisons Between Microquasars XTE J1817-330 and XTE J1818- 245 Cadolle Bel, M.; Prat, L.; Rodriguez, J.; Kuulkers, E.; Barragan, L.; Ribo, M.; Moldon, J.; Chaty, S.; Zurita-Heras, J.; D'Avanzo, P.; Campana, S.; Corbel, S.; Goldwurm, A.; Goldoni, P. 18 The Scutum survey Camero-Arranz, A.; Connell, P.; Segreto, A.; Fabregat, J. 19 Pulse profile study of the X-ray pulsar A 0535+26 Camero-Arranz, A.; Kretschmar, P.; Caballero, I.; Wilson, C.A.; Finger, M.H. 19 X-rays from Quiescent Black Holes: Accretion or Jet Powered? Cui, W.; Pszota, G.; Yuan, F.; Zhang, H. 20 XMM-Newton observation of the Z-source GX 340+0 D'Ai, A.; Iaria, R.; Di Salvo, T.; Matt, G. 20 XMM-Newton Look on the Bright Atoll 4U 1735-44 D'Ai, A.; Di Salvo, T.; Iaria, R.; Robba, N.R. 21 Variations in the dip properties of the LMXB XB 1254-69 observed with XMM-Newton D´ıaz Trigo, M.; Parmar, A.; Boirin, L.; Motch, C.; Talavera, A.; Balman, S. 21 Polarization of the thermal emission from the black-hole accretion discs Dovciak, M.; Goosmann, R.W.; Karas, V.; Matt, G. 22 SS433 as an ultraluminous UV source Fabrika, S. 22 A new Comptonization model for low-magnetized accreting neutron stars in LMXBs Farinelli, R.; Titarchuk, L.; Paizis, A.; Frontera, F. 23 The Variable Source Content of the 2XMM Catalogue Farrell, S.A.; Rodrigues, J.M.G.; Villa Pascual, D.; Webb, N.; Barret, D. 23 The accretion disc dynamics and nature of white dwarf binaries as X-ray sources Filipov, L.G. 24 Models for Low-Mass X-Ray Binaries in the Elliptical galaxies NGC3379 and NGC427 Fragos, T.; Kalogera, K.; Belczynski, K.; Fabbiano, G. 24 Rapid optical/X-ray flux correlations in the low/hard state of GX 339-4 Gandhi, P.; Makishima, K.; Durant, M.; Dhillon, V.; Fabian, A.C.; Marsh, T.; Miller, J.M.; Shahbaz, T.; Spruit, H. 25 X-ray spectral variability in the ULX population of NGC 4485 and NGC 4490 Gladstone, J.C.; Roberts, T.P. 25 XMM-Newton's view of the eclipsing burster low-mass X-ray binary AX J1745.6-2901 Grosso, N.; Porquet, D.; Boirin, L. 26 A Jet Emitting Disc model for the microquasar broad band emission. Henri, G.; Petrucci, P.-O.; Ferreira, J.; Foellmi, C. 26 A study of aperiodic time variation of Vela X-1 Kohmura, T.; Kitamoto, S. 27 The thermal emission component in low-luminosity binary pulsars La Palombara, N.
Load more

Recommended publications
  • Radio Sources in Low-Luminosity Active Galactic Nuclei
    A&A 392, 53–82 (2002) Astronomy DOI: 10.1051/0004-6361:20020874 & c ESO 2002 Astrophysics Radio sources in low-luminosity active galactic nuclei III. “AGNs” in a distance-limited sample of “LLAGNs” N. M. Nagar1, H. Falcke2,A.S.Wilson3, and J. S. Ulvestad4 1 Arcetri Observatory, Largo E. Fermi 5, Florence 50125, Italy 2 Max-Planck-Institut f¨ur Radioastronomie, Auf dem H¨ugel 69, 53121 Bonn, Germany e-mail: [email protected] 3 Department of Astronomy, University of Maryland, College Park, MD 20742, USA Adjunct Astronomer, Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA e-mail: [email protected] 4 National Radio Astronomy Observatory, PO Box 0, Socorro, NM 87801, USA e-mail: [email protected] Received 23 January 2002 / Accepted 6 June 2002 Abstract. This paper presents the results of a high resolution radio imaging survey of all known (96) low-luminosity active galactic nuclei (LLAGNs) at D ≤ 19 Mpc. We first report new 2 cm (150 mas resolution using the VLA) and 6 cm (2 mas resolution using the VLBA) radio observations of the previously unobserved nuclei in our samples and then present results on the complete survey. We find that almost half of all LINERs and low-luminosity Seyferts have flat-spectrum radio cores when observed at 150 mas resolution. Higher (2 mas) resolution observations of a flux-limited subsample have provided a 100% (16 of 16) detection rate of pc-scale radio cores, with implied brightness temperatures ∼>108 K. The five LLAGNs with the highest core radio fluxes also have pc-scale “jets”.
    [Show full text]
  • Grant Proposals, 1991-1999
    Grant Proposals, 1991-1999 Finding aid prepared by Smithsonian Institution Archives Smithsonian Institution Archives Washington, D.C. Contact us at [email protected] Table of Contents Collection Overview ........................................................................................................ 1 Administrative Information .............................................................................................. 1 Descriptive Entry.............................................................................................................. 1 Names and Subjects ...................................................................................................... 1 Container Listing ............................................................................................................. 2 Grant Proposals https://siarchives.si.edu/collections/siris_arc_251859 Collection Overview Repository: Smithsonian Institution Archives, Washington, D.C., [email protected] Title: Grant Proposals Identifier: Accession 99-171 Date: 1991-1999 Extent: 17 cu. ft. (17 record storage boxes) Creator:: Smithsonian Astrophysical Observatory. Contracts and Procurement Office Language: English Administrative Information Prefered Citation Smithsonian Institution Archives, Accession 99-171, Smithsonian Astrophysical Observatory, Contracts and Procurement Office, Grant Proposals Descriptive Entry This accession consists of records documenting Smithsonian Astrophysical Observatory projects and activities. Materials include proposals, correspondence, progress
    [Show full text]
  • Astronomy Magazine Special Issue
    γ ι ζ γ δ α κ β κ ε γ β ρ ε ζ υ α φ ψ ω χ α π χ φ γ ω ο ι δ κ α ξ υ λ τ μ β α σ θ ε β σ δ γ ψ λ ω σ η ν θ Aι must-have for all stargazers η δ μ NEW EDITION! ζ λ β ε η κ NGC 6664 NGC 6539 ε τ μ NGC 6712 α υ δ ζ M26 ν NGC 6649 ψ Struve 2325 ζ ξ ATLAS χ α NGC 6604 ξ ο ν ν SCUTUM M16 of the γ SERP β NGC 6605 γ V450 ξ η υ η NGC 6645 M17 φ θ M18 ζ ρ ρ1 π Barnard 92 ο χ σ M25 M24 STARS M23 ν β κ All-in-one introduction ALL NEW MAPS WITH: to the night sky 42,000 more stars (87,000 plotted down to magnitude 8.5) AND 150+ more deep-sky objects (more than 1,200 total) The Eagle Nebula (M16) combines a dark nebula and a star cluster. In 100+ this intense region of star formation, “pillars” form at the boundaries spectacular between hot and cold gas. You’ll find this object on Map 14, a celestial portion of which lies above. photos PLUS: How to observe star clusters, nebulae, and galaxies AS2-CV0610.indd 1 6/10/10 4:17 PM NEW EDITION! AtlAs Tour the night sky of the The staff of Astronomy magazine decided to This atlas presents produce its first star atlas in 2006.
    [Show full text]
  • 121012-AAS-221 Program-14-ALL, Page 253 @ Preflight
    221ST MEETING OF THE AMERICAN ASTRONOMICAL SOCIETY 6-10 January 2013 LONG BEACH, CALIFORNIA Scientific sessions will be held at the: Long Beach Convention Center 300 E. Ocean Blvd. COUNCIL.......................... 2 Long Beach, CA 90802 AAS Paper Sorters EXHIBITORS..................... 4 Aubra Anthony ATTENDEE Alan Boss SERVICES.......................... 9 Blaise Canzian Joanna Corby SCHEDULE.....................12 Rupert Croft Shantanu Desai SATURDAY.....................28 Rick Fienberg Bernhard Fleck SUNDAY..........................30 Erika Grundstrom Nimish P. Hathi MONDAY........................37 Ann Hornschemeier Suzanne H. Jacoby TUESDAY........................98 Bethany Johns Sebastien Lepine WEDNESDAY.............. 158 Katharina Lodders Kevin Marvel THURSDAY.................. 213 Karen Masters Bryan Miller AUTHOR INDEX ........ 245 Nancy Morrison Judit Ries Michael Rutkowski Allyn Smith Joe Tenn Session Numbering Key 100’s Monday 200’s Tuesday 300’s Wednesday 400’s Thursday Sessions are numbered in the Program Book by day and time. Changes after 27 November 2012 are included only in the online program materials. 1 AAS Officers & Councilors Officers Councilors President (2012-2014) (2009-2012) David J. Helfand Quest Univ. Canada Edward F. Guinan Villanova Univ. [email protected] [email protected] PAST President (2012-2013) Patricia Knezek NOAO/WIYN Observatory Debra Elmegreen Vassar College [email protected] [email protected] Robert Mathieu Univ. of Wisconsin Vice President (2009-2015) [email protected] Paula Szkody University of Washington [email protected] (2011-2014) Bruce Balick Univ. of Washington Vice-President (2010-2013) [email protected] Nicholas B. Suntzeff Texas A&M Univ. suntzeff@aas.org Eileen D. Friel Boston Univ. [email protected] Vice President (2011-2014) Edward B. Churchwell Univ. of Wisconsin Angela Speck Univ. of Missouri [email protected] [email protected] Treasurer (2011-2014) (2012-2015) Hervey (Peter) Stockman STScI Nancy S.
    [Show full text]
  • The Cataclysmic Variable AE Aquarii: Orbital Variability in V Band
    The cataclysmic variable AE Aquarii: orbital variability in V band R. Zamanov & G. Latev Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, Tsarigradsko Shose 72, BG-1784 Sofia, Bulgaria [email protected] [email protected] (Submitted on 28.11.2016. Accepted on 31.01.2017) Abstract. We present 62.7 hours observations of the cataclysmic variable AE Aqr in Johnson V band. These are non-published archive electro-photometric data obtained during the time period 1993 to 1999. We construct the orbital variability in V band and obtain a Fourier fit to the double-wave quiescent light curve. The strongest flares in our data set are in phase interval 0.6 - 0.8. The data can be downloaded from http://www.astro.bas.bg/∼rz/DATA/AEAqr.elphot.dat. Key words: Stars: novae, cataclysmic variables – Accretion, accretion disks – white dwarfs – Stars: individual: AE Aqr 1 Introduction AE Aqr is a bright intermediate polar cataclysmic variable (V ≈ 11−12.3). In this semi-detached binary system a spotted K type dwarf (K0-K4 IV/V star) transfers material through the inner Lagrangian point L1 toward a magnetic white dwarf (Skidmore et al. 2003, Hill et al. 2016). It has a relatively long orbital period of 9.88 hours (Robinson et al. 1991; Echevarr´ıa et al. 2008) and an extremely short rotational period of the white dwarf of only 33 s (Patterson et al. 1980). To appear in such a state, AE Aqr should be a former supersoft X-ray binary, in which the mass transfer rate in the recent past (≈ 107 yr) has been much higher than its current value (Schenker et al.
    [Show full text]
  • Msc-Whipple Analysis 2010
    TWO DIMENSIONAL ANALYSIS OF INCOMPLETE PARAMETERISED ARCHIVAL DATA FROM THE WHIPPLE 10 METRE IMAGING ATMOSPHERIC CHERENKOV TELESCOPE CENTERED ON AE AQUARII by Michael Connolly H.Dip., B.D., B.Ph., B.Sc. A dissertation submitted to the Centre for Astronomy, School of Physics, National University of Ireland, Galway in fulfilment of the requirements for the degree of Master of Science Supervisor Dr Mark Lang February 2010 Galway, Ireland MSc-Whipple Analysis 2010 Dedicated to the memory of Martin Connolly (1940-1985) Hard work and belief can accomplish, With God’s help 1. Michael Connolly Page 2 MSc-Whipple Analysis 2010 1. Michael Connolly Page 3 MSc-Whipple Analysis 2010 Contents List of Figures. 8 List of Tables. 12 Acknowledgements. 12 Abstract. 14 Chapter 1: Introduction to Thesis 1.1 Introduction. 16 1.2 Thesis Overview. 17 1.3 Personal Contribution. 18 Chapter 2: Very High Energy Gamma-Ray Astronomy 2.1 Introduction. 20 2.2 Gamma ray production in the Earth’s atmosphere. 23 2.3 Extensive Air Showers. 23 2.3.1 Pair Production. 24 2.3.2 Electron-photon cascades or electromagnetic showers. 25 2.4 Extensive air showers from two different progenitors. 26 2.4.1 Properties of gamma ray induced showers. 26 2.4.2 Properties of cosmic ray induced showers. 27 2.5 What is Cherenkov light? . 28 1. Michael Connolly Page 4 MSc-Whipple Analysis 2010 2.6 Relative incidence of high energy electromagnetic photons . 31 2.7 History. 33 2.8 VHE gamma ray sources and production. 38 2.8.1 Physical processes involved in gamma ray production.
    [Show full text]
  • Synapses of Active Galactic Nuclei: Comparing X-Ray and Optical Classifications Using Artificial Neural Networks?
    A&A 567, A92 (2014) Astronomy DOI: 10.1051/0004-6361/201322592 & c ESO 2014 Astrophysics Synapses of active galactic nuclei: Comparing X-ray and optical classifications using artificial neural networks? O. González-Martín1;2;??, D. Díaz-González3, J. A. Acosta-Pulido1;2, J. Masegosa4, I. E. Papadakis5;6, J. M. Rodríguez-Espinosa1;2, I. Márquez4, and L. Hernández-García4 1 Instituto de Astrofísica de Canarias (IAC), C/Vía Láctea s/n, 38205 La Laguna, Spain e-mail: [email protected] 2 Departamento de Astrofísica, Universidad de La Laguna (ULL), 38205 La Laguna, Spain 3 Shidix Technologies, 38320, La Laguna, Spain 4 Instituto de Astrofísica de Andalucía, CSIC, C/ Glorieta de la Astronomía s/n, 18005 Granada, Spain 5 Physics Department, University of Crete, PO Box 2208, 710 03 Heraklion, Crete, Greece 6 IESL, Foundation for Research and Technology, 711 10 Heraklion, Crete, Greece Received 2 September 2013 / Accepted 3 April 2014 ABSTRACT Context. Many classes of active galactic nuclei (AGN) have been defined entirely through optical wavelengths, while the X-ray spectra have been very useful to investigate their inner regions. However, optical and X-ray results show many discrepancies that have not been fully understood yet. Aims. The main purpose of the present paper is to study the synapses (i.e., connections) between X-ray and optical AGN classifications. Methods. For the first time, the newly implemented efluxer task allowed us to analyse broad band X-ray spectra of a sample of emission-line nuclei without any prior spectral fitting. Our sample comprises 162 spectra observed with XMM-Newton/pn of 90 lo- cal emission line nuclei in the Palomar sample.
    [Show full text]
  • New Type of Black Hole Detected in Massive Collision That Sent Gravitational Waves with a 'Bang'
    New type of black hole detected in massive collision that sent gravitational waves with a 'bang' By Ashley Strickland, CNN Updated 1200 GMT (2000 HKT) September 2, 2020 <img alt="Galaxy NGC 4485 collided with its larger galactic neighbor NGC 4490 millions of years ago, leading to the creation of new stars seen in the right side of the image." class="media__image" src="//cdn.cnn.com/cnnnext/dam/assets/190516104725-ngc-4485-nasa-super-169.jpg"> Photos: Wonders of the universe Galaxy NGC 4485 collided with its larger galactic neighbor NGC 4490 millions of years ago, leading to the creation of new stars seen in the right side of the image. Hide Caption 98 of 195 <img alt="Astronomers developed a mosaic of the distant universe, called the Hubble Legacy Field, that documents 16 years of observations from the Hubble Space Telescope. The image contains 200,000 galaxies that stretch back through 13.3 billion years of time to just 500 million years after the Big Bang. " class="media__image" src="//cdn.cnn.com/cnnnext/dam/assets/190502151952-0502-wonders-of-the-universe-super-169.jpg"> Photos: Wonders of the universe Astronomers developed a mosaic of the distant universe, called the Hubble Legacy Field, that documents 16 years of observations from the Hubble Space Telescope. The image contains 200,000 galaxies that stretch back through 13.3 billion years of time to just 500 million years after the Big Bang. Hide Caption 99 of 195 <img alt="A ground-based telescope's view of the Large Magellanic Cloud, a neighboring galaxy of our Milky Way.
    [Show full text]
  • Search for Gamma-Ray Emission from AE Aquarii with Seven Years of FERMI-LAT Observations
    Search for gamma-ray emission from AE Aquarii with seven years of FERMI-LAT observations Jian Li1, Diego F. Torres1,2, Nanda Rea1,3, Emma de O˜na Wilhelmi1, Alessandro Papitto4, Xian Hou5, & Christopher W. Mauche6 ABSTRACT AE Aquarii (AE Aqr) is a cataclysmic binary hosting one of the fastest rotating (Pspin = 33.08 s) white dwarfs known. Based on seven years of Fermi Large Area Tele- scope (LAT) Pass 8 data, we report on a deep search for gamma-ray emission from æ. Using X-ray observations from ASCA, XMM-Newton, Chandra, Swift, Suzaku, and NuSTAR, spanning 20 years, we substantially extend and improve the spin ephemeris of æ. Using this ephemeris, we searched for gamma-ray pulsations at the spin period of the white dwarf. No gamma-ray pulsations were detected above 3 σ significance. Neither phase-averaged gamma-ray emission nor gamma-ray variability of æ is de- tected by Fermi-LAT. We impose the most restrictive upper limit to the gamma-ray flux from æ to date: 1.3 × 10−12 erg cm−2 s−1 in the 100 MeV–300 GeV energy range, providing constraints on models. Subject headings: gamma rays: stars — cataclysmic binary: individual: æ 1. Introduction Cataclysmic variables (CVs) are semi-detached binaries consisting of a white dwarf (WD) and a companion star, usually a red dwarf. æ is a bright (V≈11, Welsh et al. 1999) CV hosting one of the fastest rotating WDs known (Pspin = 33.08 s, Patterson 1979) and a K 4-5 V secondary; it is arXiv:1608.06662v1 [astro-ph.HE] 23 Aug 2016 1Institute of Space Sciences (IEEC-CSIC), Campus UAB, Carrer de Magrans s/n, 08193 Barcelona, Spain 2Instituci´oCatalana de Recerca i Estudis Avanc¸ats (ICREA), E-08010 Barcelona, Spain 3Anton Pannekoek Institute, University of Amsterdam, Postbus 94249, NL-1090-GE Amsterdam, The Netherlands 4INAF-Osservatorio Astronomico di Roma, via di Frascati 33, I-00040 Monte Porzio Catone, Roma, Italy 5Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China.
    [Show full text]
  • On the Mass Transfer in AE Aquarii
    A&A 421, 1131–1142 (2004) Astronomy DOI: 10.1051/0004-6361:20040319 & c ESO 2004 Astrophysics On the mass transfer in AE Aquarii N. R. Ikhsanov1,3,4,V.V.Neustroev2,5, and N. G. Beskrovnaya3,4 1 Korea Astronomy Observatory, 61-1 Whaam-dong, Yusong-gu, Taejon 305-348, Republic of Korea 2 Computational Astrophysics Laboratory, National University of Ireland, Galway, Newcastle Rd., Galway, Ireland 3 Central Astronomical Observatory of the Russian Academy of Sciences, Pulkovo 65/1, 196140 St. Petersburg, Russia 4 Isaac Newton Institute of Chile, St. Petersburg Branch, Russia 5 Isaac Newton Institute of Chile, Kazan Branch, Russia Received 24 February 2004 / Accepted 30 March 2004 Abstract. The observed properties of the close binary AE Aqr indicate that the mass transfer in this system operates via the Roche lobe overflow mechanism, but the material transferred from the normal companion is neither accreted onto the surface of the white dwarf nor stored in a disk around its magnetosphere. As previously shown, such a situation can be realized if the white dwarf operates as a propeller. At the same time, the efficiency of the propeller action by the white dwarf is insufficient to explain the rapid braking of the white dwarf, which implies that the spin-down power is in excess of the bolometric luminosity of the system. To avoid this problem we have simulated the mass-transfer process in AE Aqr assuming that the observed braking of the white dwarf is governed by a pulsar-like spin-down mechanism. We show that the expected Hα Doppler tomogram in this case resembles the tomogram observed from the system.
    [Show full text]
  • (Ap) Mag Size Distance Rise Transit Set Gal NGC 6217 Arp 185 Umi
    Herschel 400 Observing List, evening of 2015 Oct 15 at Cleveland, Ohio Sunset 17:49, Twilight ends 19:18, Twilight begins 05:07, Sunrise 06:36, Moon rise 09:51, Moon set 19:35 Completely dark from 19:35 to 05:07. Waxing Crescent Moon. All times local (EST). Listing All Classes visible above the perfect horizon and in twilight or moonlight before 23:59. Cls Primary ID Alternate ID Con RA (Ap) Dec (Ap) Mag Size Distance Rise Transit Set Gal NGC 6217 Arp 185 UMi 16h31m48.9s +78°10'18" 11.9 2.6'x 2.1' - 15:22 - Gal NGC 2655 Arp 225 Cam 08h57m35.6s +78°09'22" 11 4.5'x 2.8' - 7:46 - Gal NGC 3147 MCG 12-10-25 Dra 10h18m08.0s +73°19'01" 11.3 4.1'x 3.5' - 9:06 - PNe NGC 40 PN G120.0+09.8 Cep 00h13m59.3s +72°36'43" 10.7 1.0' 3700 ly - 23:03 - Gal NGC 2985 MCG 12-10-6 UMa 09h51m42.0s +72°12'01" 11.2 3.8'x 3.1' - 8:39 - Gal Cigar Galaxy M 82 UMa 09h57m06.5s +69°35'59" 9 9.3'x 4.4' 12.0 Mly - 8:45 - Gal NGC 1961 Arp 184 Cam 05h43m51.6s +69°22'44" 11.8 4.1'x 2.9' 180.0 Mly - 4:32 - Gal NGC 2787 MCG 12-9-39 UMa 09h20m40.5s +69°07'51" 11.6 3.2'x 1.8' - 8:09 - Gal NGC 3077 MCG 12-10-17 UMa 10h04m31.3s +68°39'09" 10.6 5.1'x 4.2' 12.0 Mly - 8:52 - Gal NGC 2976 MCG 11-12-25 UMa 09h48m29.2s +67°50'21" 10.8 6.0'x 3.1' 15.0 Mly - 8:36 - PNe Cat's Eye Nebula NGC 6543 Dra 17h58m31.7s +66°38'25" 8.3 22" 4400 ly - 16:49 - Open NGC 7142 Collinder 442 Cep 21h45m34.2s +65°51'16" 10 12.0' 5500 ly - 20:35 - Gal NGC 2403 MCG 11-10-7 Cam 07h38m20.9s +65°33'36" 8.8 20.0'x 10.0' 11.0 Mly - 6:26 - Open NGC 637 Collinder 17 Cas 01h44m15.4s +64°07'07" 7.3 3.0' 7000 ly - 0:33
    [Show full text]
  • The Iso Handbook
    THE ISO HANDBOOK Volume I: ISO – Mission & Satellite Overview Martin F. Kessler1,2, Thomas G. M¨uller1,4, Kieron Leech 1, Christophe Arviset1, Pedro Garc´ıa-Lario1, Leo Metcalfe1, Andy M. T. Pollock1,3, Timo Prusti1,2 and Alberto Salama1 SAI-2000-035/Dc, Version 2.0 November, 2003 1 ISO Data Centre, Science Operations and Data Systems Division Research and Scientific Support Department of ESA, Villafranca del Castillo, P.O. Box 50727, E-28080 Madrid, Spain 2 ESTEC, Science Operations and Data Systems Division Research and Scientific Support Department of ESA, Keplerlaan 1, Postbus 299, 2200 AG Noordwijk, The Netherlands 3 Computer & Scientific Co. Ltd., 230 Graham Road, Sheffield S10 3GS, England 4 Max-Planck-Institut f¨ur extraterrestrische Physik, Giessenbachstraße, D-85748 Garching, Germany ii Document Information Document: The ISO Handbook Volume: I Title: ISO - Mission & Satellite Overview Reference Number: SAI/2000-035/Dc Issue: Version 2.0 Issue Date: November 2003 Authors: M.F. Kessler, T. M¨uller, K. Leech et al. Editors: T. M¨uller, J. Blommaert & P. Garc´ıa-Lario Web-Editor: J. Matagne Document History The ISO Handbook, Volume I: ISO – Mission & Satellite Overview is mainly based on the following documents: • The ISO Handbook, Volume I: ISO – Mission Overview, Kessler M.F., M¨uller T.G., Arviset C. et al., earlier versions, SAI-2000-035/Dc. • The ISO Handbook, Volume II: ISO – The Satellite and its Data, K. Leech & A.M.T. Pollock, earlier versions, SAI-99-082/Dc. • The following ESA Bulletin articles: The ISO Mission – A Scientific Overview, M.F. Kessler, A.
    [Show full text]