The Ledger and Times, February 18, 1967
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Stsci Newsletter: 1997 Volume 014 Issue 01
January 1997 • Volume 14, Number 1 SPACE TELESCOPE SCIENCE INSTITUTE Highlights of this issue: • AURA science and functional awards to Leitherer and Hanisch — pages 1 and 23 • Cycle 7 to be extended — page 5 • Cycle 7 approved Newsletter program listing — pages 7-13 Astronomy with HST Climbing the Starburst Distance Ladder C. Leitherer Massive stars are an important and powerful star formation events in sometimes dominant energy source for galaxies. Even the most luminous star- a galaxy. Their high luminosity, both in forming regions in our Galaxy are tiny light and mechanical energy, makes on a cosmic scale. They are not them detectable up to cosmological dominated by the properties of an distances. Stars ~100 times more entire population but by individual massive than the Sun are one million stars. Therefore stochastic effects times more luminous. Except for stars prevail. Extinction represents a severe of transient brightness, like novae and problem when a reliable census of the supernovae, hot, massive stars are Galactic high-mass star-formation the most luminous stellar objects in history is atempted, especially since the universe. massive stars belong to the extreme Massive stars are, however, Population I, with correspondingly extremely rare: The number of stars small vertical scale heights. Moreover, formed per unit mass interval is the proximity of Galactic regions — roughly proportional to the -2.35 although advantageous for detailed power of mass. We expect to find very studies of individual stars — makes it few massive stars compared to, say, difficult to obtain integrated properties, solar-type stars. This is consistent with such as total emission-line fluxes of observations in our solar neighbor- the ionized gas. -
Mathématiques Et Espace
Atelier disciplinaire AD 5 Mathématiques et Espace Anne-Cécile DHERS, Education Nationale (mathématiques) Peggy THILLET, Education Nationale (mathématiques) Yann BARSAMIAN, Education Nationale (mathématiques) Olivier BONNETON, Sciences - U (mathématiques) Cahier d'activités Activité 1 : L'HORIZON TERRESTRE ET SPATIAL Activité 2 : DENOMBREMENT D'ETOILES DANS LE CIEL ET L'UNIVERS Activité 3 : D'HIPPARCOS A BENFORD Activité 4 : OBSERVATION STATISTIQUE DES CRATERES LUNAIRES Activité 5 : DIAMETRE DES CRATERES D'IMPACT Activité 6 : LOI DE TITIUS-BODE Activité 7 : MODELISER UNE CONSTELLATION EN 3D Crédits photo : NASA / CNES L'HORIZON TERRESTRE ET SPATIAL (3 ème / 2 nde ) __________________________________________________ OBJECTIF : Détermination de la ligne d'horizon à une altitude donnée. COMPETENCES : ● Utilisation du théorème de Pythagore ● Utilisation de Google Earth pour évaluer des distances à vol d'oiseau ● Recherche personnelle de données REALISATION : Il s'agit ici de mettre en application le théorème de Pythagore mais avec une vision terrestre dans un premier temps suite à un questionnement de l'élève puis dans un second temps de réutiliser la même démarche dans le cadre spatial de la visibilité d'un satellite. Fiche élève ____________________________________________________________________________ 1. Victor Hugo a écrit dans Les Châtiments : "Les horizons aux horizons succèdent […] : on avance toujours, on n’arrive jamais ". Face à la mer, vous voyez l'horizon à perte de vue. Mais "est-ce loin, l'horizon ?". D'après toi, jusqu'à quelle distance peux-tu voir si le temps est clair ? Réponse 1 : " Sans instrument, je peux voir jusqu'à .................. km " Réponse 2 : " Avec une paire de jumelles, je peux voir jusqu'à ............... km " 2. Nous allons maintenant calculer à l'aide du théorème de Pythagore la ligne d'horizon pour une hauteur H donnée. -
On the Weak-Wind Problem in Massive Stars: X-Ray Spectra Reveal a Massive Hot Wind in Mu Columbae
East Tennessee State University From the SelectedWorks of Richard Ignace September 10, 2012 On the Weak-Wind Problem in Massive Stars: X- Ray Spectra Reveal a Massive Hot Wind in mu Columbae. David P. Huenemoerder, Massachusetts nI stitute of Technology Lidia M. Oskinova, University of Potsdam Richard Ignace, East Tennessee State University Wayne L. Waldron, Eureka Scientific nI c. Helge Todt, University of Potsdam, et al. Available at: https://works.bepress.com/richard_ignace/61/ The Astrophysical Journal Letters, 756:L34 (5pp), 2012 September 10 doi:10.1088/2041-8205/756/2/L34 C 2012. The American Astronomical Society. All rights reserved. Printed in the U.S.A. ON THE WEAK-WIND PROBLEM IN MASSIVE STARS: X-RAY SPECTRA REVEAL A MASSIVE HOT WIND IN μ COLUMBAE David P. Huenemoerder1, Lidia M. Oskinova2, Richard Ignace3, Wayne L. Waldron4, Helge Todt2, Kenji Hamaguchi5,6, and Shunji Kitamoto7 1 Massachusetts Institute of Technology, Kavli Institute for Astrophysics and Space Research, 70 Vassar Street, Cambridge, MA 02139, USA 2 Institute for Physics and Astronomy, University of Potsdam, D-14476 Potsdam, Germany 3 Department of Physics and Astronomy, East Tennessee State University, Johnson City, TN 37614, USA 4 Eureka Scientific Inc., 2452 Dellmer Street, Suite 100, Oakland, CA 94602, USA 5 CRESST and X-ray Astrophysics Laboratory, NASA/GSFC, Greenbelt, MD 20771, USA 6 Department of Physics, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA 7 Department of Physics, Rikkyo University, Tokyo 171-8501, Japan Received 2012 June 16; accepted 2012 August 3; published 2012 August 22 ABSTRACT μ Columbae is a prototypical weak-wind O star for which we have obtained a high-resolution X-ray spectrum with the Chandra LETG/ACIS instrument and a low-resolution spectrum with Suzaku. -
A Basic Requirement for Studying the Heavens Is Determining Where In
Abasic requirement for studying the heavens is determining where in the sky things are. To specify sky positions, astronomers have developed several coordinate systems. Each uses a coordinate grid projected on to the celestial sphere, in analogy to the geographic coordinate system used on the surface of the Earth. The coordinate systems differ only in their choice of the fundamental plane, which divides the sky into two equal hemispheres along a great circle (the fundamental plane of the geographic system is the Earth's equator) . Each coordinate system is named for its choice of fundamental plane. The equatorial coordinate system is probably the most widely used celestial coordinate system. It is also the one most closely related to the geographic coordinate system, because they use the same fun damental plane and the same poles. The projection of the Earth's equator onto the celestial sphere is called the celestial equator. Similarly, projecting the geographic poles on to the celest ial sphere defines the north and south celestial poles. However, there is an important difference between the equatorial and geographic coordinate systems: the geographic system is fixed to the Earth; it rotates as the Earth does . The equatorial system is fixed to the stars, so it appears to rotate across the sky with the stars, but of course it's really the Earth rotating under the fixed sky. The latitudinal (latitude-like) angle of the equatorial system is called declination (Dec for short) . It measures the angle of an object above or below the celestial equator. The longitud inal angle is called the right ascension (RA for short). -
The Brightest Stars Seite 1 Von 9
The Brightest Stars Seite 1 von 9 The Brightest Stars This is a list of the 300 brightest stars made using data from the Hipparcos catalogue. The stellar distances are only fairly accurate for stars well within 1000 light years. 1 2 3 4 5 6 7 8 9 10 11 12 13 No. Star Names Equatorial Galactic Spectral Vis Abs Prllx Err Dist Coordinates Coordinates Type Mag Mag ly RA Dec l° b° 1. Alpha Canis Majoris Sirius 06 45 -16.7 227.2 -8.9 A1V -1.44 1.45 379.21 1.58 9 2. Alpha Carinae Canopus 06 24 -52.7 261.2 -25.3 F0Ib -0.62 -5.53 10.43 0.53 310 3. Alpha Centauri Rigil Kentaurus 14 40 -60.8 315.8 -0.7 G2V+K1V -0.27 4.08 742.12 1.40 4 4. Alpha Boötis Arcturus 14 16 +19.2 15.2 +69.0 K2III -0.05 -0.31 88.85 0.74 37 5. Alpha Lyrae Vega 18 37 +38.8 67.5 +19.2 A0V 0.03 0.58 128.93 0.55 25 6. Alpha Aurigae Capella 05 17 +46.0 162.6 +4.6 G5III+G0III 0.08 -0.48 77.29 0.89 42 7. Beta Orionis Rigel 05 15 -8.2 209.3 -25.1 B8Ia 0.18 -6.69 4.22 0.81 770 8. Alpha Canis Minoris Procyon 07 39 +5.2 213.7 +13.0 F5IV-V 0.40 2.68 285.93 0.88 11 9. Alpha Eridani Achernar 01 38 -57.2 290.7 -58.8 B3V 0.45 -2.77 22.68 0.57 144 10. -
Ioptron CEM40 Center-Balanced Equatorial Mount
iOptron®CEM40 Center-Balanced Equatorial Mount Instruction Manual Product CEM40 (#7400A series) and CEM40EC (#7400ECA series, as shown) Please read the included CEM40 Quick Setup Guide (QSG) BEFORE taking the mount out of the case! This product is a precision instrument. Please read the included QSG before assembling the mount. Please read the entire Instruction Manual before operating the mount. You must hold the mount firmly when disengaging the gear switches. Otherwise personal injury and/or equipment damage may occur. Any worm system damage due to improper operation will not be covered by iOptron’s limited warranty. If you have any questions please contact us at [email protected] WARNING! NEVER USE A TELESCOPE TO LOOK AT THE SUN WITHOUT A PROPER FILTER! Looking at or near the Sun will cause instant and irreversible damage to your eye. Children should always have adult supervision while using a telescope. 2 Table of Contents Table of Contents ........................................................................................................................................ 3 1. CEM40 Introduction ............................................................................................................................... 5 2. CEM40 Overview ................................................................................................................................... 6 2.1. Parts List ......................................................................................................................................... -
GTO Keypad Manual, V5.001
ASTRO-PHYSICS GTO KEYPAD Version v5.xxx Please read the manual even if you are familiar with previous keypad versions Flash RAM Updates Keypad Java updates can be accomplished through the Internet. Check our web site www.astro-physics.com/software-updates/ November 11, 2020 ASTRO-PHYSICS KEYPAD MANUAL FOR MACH2GTO Version 5.xxx November 11, 2020 ABOUT THIS MANUAL 4 REQUIREMENTS 5 What Mount Control Box Do I Need? 5 Can I Upgrade My Present Keypad? 5 GTO KEYPAD 6 Layout and Buttons of the Keypad 6 Vacuum Fluorescent Display 6 N-S-E-W Directional Buttons 6 STOP Button 6 <PREV and NEXT> Buttons 7 Number Buttons 7 GOTO Button 7 ± Button 7 MENU / ESC Button 7 RECAL and NEXT> Buttons Pressed Simultaneously 7 ENT Button 7 Retractable Hanger 7 Keypad Protector 8 Keypad Care and Warranty 8 Warranty 8 Keypad Battery for 512K Memory Boards 8 Cleaning Red Keypad Display 8 Temperature Ratings 8 Environmental Recommendation 8 GETTING STARTED – DO THIS AT HOME, IF POSSIBLE 9 Set Up your Mount and Cable Connections 9 Gather Basic Information 9 Enter Your Location, Time and Date 9 Set Up Your Mount in the Field 10 Polar Alignment 10 Mach2GTO Daytime Alignment Routine 10 KEYPAD START UP SEQUENCE FOR NEW SETUPS OR SETUP IN NEW LOCATION 11 Assemble Your Mount 11 Startup Sequence 11 Location 11 Select Existing Location 11 Set Up New Location 11 Date and Time 12 Additional Information 12 KEYPAD START UP SEQUENCE FOR MOUNTS USED AT THE SAME LOCATION WITHOUT A COMPUTER 13 KEYPAD START UP SEQUENCE FOR COMPUTER CONTROLLED MOUNTS 14 1 OBJECTS MENU – HAVE SOME FUN! -
TRANSIT the Newsletter Of
TRANSIT The Newsletter of 05 January 2009 Hubble caught Saturn with the edge-on rings in 1996. Image courtesy Eric Karkoschka (UoA) Front Page Image - Saturn, like the Earth, is tilted on its axis compared to the plane of its orbit, being off vertical by 26.7 degrees. Saturn’s rings are aligned with its equator so that means that roughly twice every orbit of Saturn we on Earth see the rings edge on. We pass through the ring plane in September 2009 but at that time Saturn is on the other side of the Sun, so now is the best time to view Saturn in Leo with the almost disappeared rings when they are inclined at 0.8 degrees to our line of sight. The next ring plane crossing is March 2025 Last meeting : 12 December 2008. “The Large Hadron Collider” by Dr Peter Edwards of Durham University. Dr Edwards proved he was a skilled public communicator when he initially launched into a short history of particle physics – we all understood what he was talking about! After then explaining what the LHC was actually looking for and how their massive detectors work he explained the problems caused by the unfortunate accident when firing up the LHC for the first time. The prognosis for future collisions seems to have a varying date but perhaps the 2010 date is the most likely. We wish Dr Edwards and his LHC colleagues the best of luck in achieving an early target date. Next meeting : 09 January 2009 – Members night. The meeting will start with the Society 2009 AGM and follow on with short talks presented by members of the Society. -
A.K.A., a Simple Explanation of All Exoplanet Images to Date
TheThe RoleRole ofof StellarStellar MassMass inin High-ContrastHigh-Contrast ImagingImaging JustinJustin R.R. Crepp,Crepp, JohnJohn A.A. JohnsonJohnson (a.k.a.,(a.k.a., aa simplesimple explanationexplanation ofof CaliforniaCalifornia InstituteInstitute ofof TechnologyTechnology arXiv:1103:4910 (accepted to ApJ) allall exoplanetexoplanet imagesimages toto date)date) (1)(1) WhyWhy havehave thethe firstfirst handfulhandful ofof exoplanetexoplanet imagesimages beenbeen (5)(5) TableTable 11 andand ourour simulationsimulation resultsresults areare consistentconsistent withwith thethe aroundaround M,KM,K andand AA stars,stars, butbut nono spectralspectral typestypes inin between?between? (3)(3) TwoTwo additionaladditional observationalobservational resultsresults supportsupport presencepresence ofof twotwo differentdifferent planetplanet formationformation mechanisms:mechanisms: oneone operatingoperating ThisThis mustmust bebe tellingtelling usus somethingsomething aboutabout planetplanet formation.formation. interpretationinterpretation ofof BetaBeta PicPic bb andand thethe HRHR 87998799 planetsplanets asas closeclose toto starsstars thatthat resultsresults inin strongstrong correlationscorrelations betweenbetween starstar massmass formingforming byby ªcore-accretionº:ªcore-accretionº: andand planetplanet properties,properties, andand anotheranother operatingoperating furtherfurther fromfrom starsstars (or(or (i) Beta Pic b and HR 8799 bcde fall in the possiblypossibly atat allall separations)separations) wherewhere therethere existsexists -
GEORGE HERBIG and Early Stellar Evolution
GEORGE HERBIG and Early Stellar Evolution Bo Reipurth Institute for Astronomy Special Publications No. 1 George Herbig in 1960 —————————————————————– GEORGE HERBIG and Early Stellar Evolution —————————————————————– Bo Reipurth Institute for Astronomy University of Hawaii at Manoa 640 North Aohoku Place Hilo, HI 96720 USA . Dedicated to Hannelore Herbig c 2016 by Bo Reipurth Version 1.0 – April 19, 2016 Cover Image: The HH 24 complex in the Lynds 1630 cloud in Orion was discov- ered by Herbig and Kuhi in 1963. This near-infrared HST image shows several collimated Herbig-Haro jets emanating from an embedded multiple system of T Tauri stars. Courtesy Space Telescope Science Institute. This book can be referenced as follows: Reipurth, B. 2016, http://ifa.hawaii.edu/SP1 i FOREWORD I first learned about George Herbig’s work when I was a teenager. I grew up in Denmark in the 1950s, a time when Europe was healing the wounds after the ravages of the Second World War. Already at the age of 7 I had fallen in love with astronomy, but information was very hard to come by in those days, so I scraped together what I could, mainly relying on the local library. At some point I was introduced to the magazine Sky and Telescope, and soon invested my pocket money in a subscription. Every month I would sit at our dining room table with a dictionary and work my way through the latest issue. In one issue I read about Herbig-Haro objects, and I was completely mesmerized that these objects could be signposts of the formation of stars, and I dreamt about some day being able to contribute to this field of study. -
Supernova Star Maps
Supernova Star Maps Which Stars in the Night Sky Will Go Su pernova? About the Activity Allow visitors to experience finding stars in the night sky that will eventually go supernova. Topics Covered Observation of stars that will one day go supernova Materials Needed • Copies of this month's Star Map for your visitors- print the Supernova Information Sheet on the back. • (Optional) Telescopes A S A Participants N t i d Activities are appropriate for families Cre with children over the age of 9, the general public, and school groups ages 9 and up. Any number of visitors may participate. Location and Timing This activity is perfect for a star party outdoors and can take a few minutes, up to 20 minutes, depending on the Included in This Packet Page length of the discussion about the Detailed Activity Description 2 questions on the Supernova Helpful Hints 5 Information Sheet. Discussion can start Supernova Information Sheet 6 while it is still light. Star Maps handouts 7 Background Information There is an Excel spreadsheet on the Supernova Star Maps Resource Page that lists all these stars with all their particulars. Search for Supernova Star Maps here: http://nightsky.jpl.nasa.gov/download-search.cfm © 2008 Astronomical Society of the Pacific www.astrosociety.org Copies for educational purposes are permitted. Additional astronomy activities can be found here: http://nightsky.jpl.nasa.gov Star Maps: Stars likely to go Supernova! Leader’s Role Participants’ Role (Anticipated) Materials: Star Map with Supernova Information sheet on back Objective: Allow visitors to experience finding stars in the night sky that will eventually go supernova. -
Abstract Bookletbooklet
ABSTRACTABSTRACT BOOKLETBOOKLET PlanetPlanet FormationFormation && EvolutionEvolution 20142014 Kiel University, September 8 - 10, 2014 Scientific Rationale The goal of this workshop is to provide a common platform for scientists working in the fields of star and planet formation, exo-planets, astrobiology, and planetary research in general. Most importantly, this workshop aims to stimulate and intensify the dialogue between researchers using various approaches - observations, theory, and laboratory studies. Students and Postdocs are particularly encouraged to present their results and to use the opportunity to learn more about the main questions and most recent results in adjacent fields. www.astrophysik.uni-kiel.de/kiel2014 Contact: [email protected] Foto/Copyright: Czeslaw Martysz Planet Formation & Evolution 2014 8 - 10 September 2014 { Kiel Abstracts [updated: August 25, 2014] Scientific Organization Committee Local Organization Committee Sebastian Wolf (Chair, Universit¨atKiel) Jan Philipp Ruge (Chair) J¨urgenBlum (Universit¨atBraunschweig) Gesa Bertrang Stephan Dreizler (Universit¨atG¨ottingen) Robert Brunngr¨aber Barbara Ercolano (Universit¨atM¨unchen) Florian Kirchschlager Artie Hatzes (Th¨uringerLandessternwarte, Tautenburg) Brigitte Kuhr Willy Kley (Universit¨atT¨ubingen) Florian Ober Thomas Preibisch (Universit¨atM¨unchen) Stefan Reißl Heike Rauer (DLR, Berlin) Peter Scicluna Mario Trieloff (Universit¨atHeidelberg) Sebastian Wolf Robert Wimmer-Schweingruber (Universit¨atKiel) Gerhard Wurm (Universit¨atDuisburg)