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CENTAURI II Benutzerhandbuch
CENTAURI II Benutzerhandbuch SW-Version ab 3.1.0.73 MAYAH, CENTAURI, FLASHCAST sind eingetragene Warenzeichen. Alle anderen verwendeten Warenzeichen werden hiermit anerkannt. CENTAURI II Benutzerhandbuch ab SW 3.1.0.73 Bestell-Nr. CIIUM001 Stand 11/2005 (c) Copyright by MAYAH Communications GmbH Die Vervielfältigung des vorliegenden Handbuches, sowie der darin besprochenen Dokumentationen aus dem Internet, auch nur auszugsweise, ist nur mit ausdrücklicher schriftlicher Genehmigung der MAYAH Communications GmbH erlaubt. 1 Einführung ........................................................................................................... 1 1.1 Vorwort......................................................................................................... 1 1.2 Einbau / Installation ...................................................................................... 2 1.3 Lieferumfang ................................................................................................ 2 1.4 Umgebungs- / Betriebsbedingung................................................................ 2 1.5 Anschlüsse................................................................................................... 3 2 Verbindungsaufbau ............................................................................................. 4 2.1 ISDN Verbindungen mit dem Centauri II ...................................................... 4 2.1.1 FlashCast Technologie und Audiocodec Kategorien............................. 4 2.1.2 Wie bekomme ich eine synchronisierte Verbindung -
Messier Objects
Messier Objects From the Stocker Astroscience Center at Florida International University Miami Florida The Messier Project Main contributors: • Daniel Puentes • Steven Revesz • Bobby Martinez Charles Messier • Gabriel Salazar • Riya Gandhi • Dr. James Webb – Director, Stocker Astroscience center • All images reduced and combined using MIRA image processing software. (Mirametrics) What are Messier Objects? • Messier objects are a list of astronomical sources compiled by Charles Messier, an 18th and early 19th century astronomer. He created a list of distracting objects to avoid while comet hunting. This list now contains over 110 objects, many of which are the most famous astronomical bodies known. The list contains planetary nebula, star clusters, and other galaxies. - Bobby Martinez The Telescope The telescope used to take these images is an Astronomical Consultants and Equipment (ACE) 24- inch (0.61-meter) Ritchey-Chretien reflecting telescope. It has a focal ratio of F6.2 and is supported on a structure independent of the building that houses it. It is equipped with a Finger Lakes 1kx1k CCD camera cooled to -30o C at the Cassegrain focus. It is equipped with dual filter wheels, the first containing UBVRI scientific filters and the second RGBL color filters. Messier 1 Found 6,500 light years away in the constellation of Taurus, the Crab Nebula (known as M1) is a supernova remnant. The original supernova that formed the crab nebula was observed by Chinese, Japanese and Arab astronomers in 1054 AD as an incredibly bright “Guest star” which was visible for over twenty-two months. The supernova that produced the Crab Nebula is thought to have been an evolved star roughly ten times more massive than the Sun. -
Breakthrough Propulsion Study Assessing Interstellar Flight Challenges and Prospects
Breakthrough Propulsion Study Assessing Interstellar Flight Challenges and Prospects NASA Grant No. NNX17AE81G First Year Report Prepared by: Marc G. Millis, Jeff Greason, Rhonda Stevenson Tau Zero Foundation Business Office: 1053 East Third Avenue Broomfield, CO 80020 Prepared for: NASA Headquarters, Space Technology Mission Directorate (STMD) and NASA Innovative Advanced Concepts (NIAC) Washington, DC 20546 June 2018 Millis 2018 Grant NNX17AE81G_for_CR.docx pg 1 of 69 ABSTRACT Progress toward developing an evaluation process for interstellar propulsion and power options is described. The goal is to contrast the challenges, mission choices, and emerging prospects for propulsion and power, to identify which prospects might be more advantageous and under what circumstances, and to identify which technology details might have greater impacts. Unlike prior studies, the infrastructure expenses and prospects for breakthrough advances are included. This first year's focus is on determining the key questions to enable the analysis. Accordingly, a work breakdown structure to organize the information and associated list of variables is offered. A flow diagram of the basic analysis is presented, as well as more detailed methods to convert the performance measures of disparate propulsion methods into common measures of energy, mass, time, and power. Other methods for equitable comparisons include evaluating the prospects under the same assumptions of payload, mission trajectory, and available energy. Missions are divided into three eras of readiness (precursors, era of infrastructure, and era of breakthroughs) as a first step before proceeding to include comparisons of technology advancement rates. Final evaluation "figures of merit" are offered. Preliminary lists of mission architectures and propulsion prospects are provided. -
Naming the Extrasolar Planets
Naming the extrasolar planets W. Lyra Max Planck Institute for Astronomy, K¨onigstuhl 17, 69177, Heidelberg, Germany [email protected] Abstract and OGLE-TR-182 b, which does not help educators convey the message that these planets are quite similar to Jupiter. Extrasolar planets are not named and are referred to only In stark contrast, the sentence“planet Apollo is a gas giant by their assigned scientific designation. The reason given like Jupiter” is heavily - yet invisibly - coated with Coper- by the IAU to not name the planets is that it is consid- nicanism. ered impractical as planets are expected to be common. I One reason given by the IAU for not considering naming advance some reasons as to why this logic is flawed, and sug- the extrasolar planets is that it is a task deemed impractical. gest names for the 403 extrasolar planet candidates known One source is quoted as having said “if planets are found to as of Oct 2009. The names follow a scheme of association occur very frequently in the Universe, a system of individual with the constellation that the host star pertains to, and names for planets might well rapidly be found equally im- therefore are mostly drawn from Roman-Greek mythology. practicable as it is for stars, as planet discoveries progress.” Other mythologies may also be used given that a suitable 1. This leads to a second argument. It is indeed impractical association is established. to name all stars. But some stars are named nonetheless. In fact, all other classes of astronomical bodies are named. -
THE YOUNG ASTRONOMERS NEWSLETTER Volume 23 Number 6 STUDY + LEARN = POWER May 2015
THE YOUNG ASTRONOMERS NEWSLETTER Volume 23 Number 6 STUDY + LEARN = POWER May 2015 ****************************************************************************************************************************** AUSTRALIAN CRATER HIDDEN STARS A team of geophysicists has found the twin scars of Scientists found a bright nebula around the Milky the impacts of a huge meteorite that broke in two Way”s nearby star 48 Librae in a patch of sky that moments before it slammed into the Earth millions of appears totally black in visible light but appears in infra- years ago in central Australia. It is the largest impact red. They said: "This cluster is probably a group of very zone ever found on Earth – 400 kilometers wide. young stars forming inside a previously undiscovered “YELLOW BALLS” molecular cloud, and the 48 Librae nebula apparently is Citizen scientists recently found a new class of due to a huge cloud of dust around the star.” curiosities that had gone unrecognized before: yellow HUBBLE IS 25! balls. Many "citizen scientist" projects make up the Hubble, the first telescope to revolutionize modern Zooniverse website which relies on “crowd-sourcing” to astronomy and change our view of the universe by help process scientific data. offering glimpses of distant galaxies, has marked its 25th The rounded features are not actually yellow but year in space. A senior scientist said: "Hubble absolutely appear that way in the infrared images the telescope has changed the way humans look at the universe and sends to Earth. See: http://www.spxdaily.com/images- our place in it." lg/yellow-balls-process-star-formation-lg.jpg A DISTANT PLANET and http://www.zooniverse.org The Spitzer Space Telescope teamed up with CANADA’S NEW TMT TELESCOPE Poland’s OGLE telescope in Chile to find a remote gas Canada and an international partnership are funding planet about 13,000 light-years away, making it one of the construction of the Thirty Meter Telescope - the top the most distant planets known. -
69-22,173 MARKOWITZ, Allan Henry, 1941- a STUDY of STARS
This dissertation has been microfilmed exactly u received 6 9 -2 2 ,1 7 3 MARKOWITZ, Allan Henry, 1941- A STUDY OF STARS EXHIBITING COM POSITE SPECTRA. The Ohio State University, Ph.D., 1969 A stron om y University Microfilms, Inc., Ann Arbor, Michigan A STUDY OF STARS EXHIBITING COMPOSITE SPECTRA DISSERTATION Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of The Ohio State University By Allan Henry Markowitz, A.B., M.Sc. ******** The Ohio S ta te U n iv e rsity 1969 Approved by UjiIjl- A dviser Department of Astronomy ACKNOWLEDGMENTS It is a sincere pleasure to thank my adviser, Professor Arne Slettebak, who originally suggested this problem and whose advice and encouragement were indispensable throughout the course of the research. I am also greatly indebted to Professor Philip Keenan for help in classifying certain late-type spectra and to Professor Terry Roark for instructing me in the operation of the Perkins Observatory telescope, I owe a special debt of gratitude to Dr. Carlos Jaschek of the La Plata Observatory for his inspiration, advice, and encourage ment. The Lowell Observatory was generous in providing extra telescope time when the need arose. I wish to particularly thank Dr. John Hall for this and for his interest. I also gratefully acknowledge the assistance of the Perkins Observatory staff. To my wife, Joan, I owe my profound thanks for her devotion and support during the seemingly unending tenure as a student. I am deeply grateful to my mother for her eternal confidence and to my in-laws for their encouragement. -
Bright Emissaries 2014:London:Ontario:Canada:V2.3 [August 11, 2014] 1
bright emissaries 2014:london:ontario:canada:v2.3 [August 11, 2014] 1 Bright Emissaries Be Stars As Messengers of Star-Disk Physics August 11-13th, 2014 London, Ontario, Canada v2.3 August 11, 2014 bright emissaries 2014:london:ontario:canada:v2.3 [August 11, 2014] 2 To the scientific career of Mike Marlborough. To the memory of Stan Stefl˘ and Olivier Chesneau. bright emissaries 2014:london:ontario:canada:v2.3 [August 11, 2014] 3 Contents Important information... 4 Western campus and map 6 Talk schedule............ 8 Posters................... 11 Invited talk abstracts..... 12 Contributed talk abstracts 18 Poster abstracts.......... 31 Local guide .............. 38 bright emissaries 2014:london:ontario:canada:v2.3 [August 11, 2014] 4 Important Information • Location: All invited and contributed talks will be held in Room 106 of the Physics & Astronomy Building (PAB). See the discussion on page 6 and the map on page 7 for an overview of the Western Campus. The poster sessions and coffee breaks will be held in the first floor atrium of the PAB. • Opening Reception: There is an informal Opening Reception on Sunday, August 10th, from 7-9pm in the first floor atrium of the PAB. You should find a drink ticket in your registration package. There will also be hors d’oeuvres and a cash bar. • Registration: You can register for the conference at any time during the Opening Reception on Sunday and between 8am and 9am on the first full day of the conference. • Internet Access: Western is a member of eduroam (www.eduroam.org). If your institution is also a participant, you should be able to use your home institution login credentials to access our local wireless network. -
1991Apj. . .370. . .78H the Astrophysical Journal
The Astrophysical Journal, 370:78-101,1991 March 20 .78H . © 1991. The American Astronomical Society. All rights reserved. Printed in U.S.A. .370. SPATIALLY RESOLVED OPTICAL IMAGES OF HIGH-REDSHIFT QUASI-STELLAR OBJECTS 1991ApJ. Timothy M. Heckman,12,3 Matthew D. Lehnert,1,2,4 Wil van Breugel,3,5 and George K. Miley2,3,6 Received 1990 June 21 ; accepted 1990 August 29 ABSTRACT We present and discuss the results of a program of deep optical imaging of 19 high-redshift (z > 2) radio- loud QSOs. These data represent the first large body of nonradio detections of spatially resolved structure surrounding high-redshift QSOs. _1 In 15 of 18 cases, the Lya emission is spatially resolved, with a typical size of 100 kpc (for H0 = 75 km s 1 44 _1 Mpc“ ; q0 = 0). The luminosity of the resolved Lya is «10 ergs s («10% of the total Lya luminosity). The nebulae are usually asymmetric and/or elongated with a morphological axis that aligns with the radio source axis to better than « 30°. These properties are quite similar to those of the Lya nebulae associated with high-z radio galaxies. The brighter side of the nebula is generally on the same side as the brighter radio emis- sion and/or one-sided, jetlike radio structure. There is no strong correlation between the Lya isophotal and radio sizes (the Lya nebulae range from several times larger than the radio source to several times smaller). None of the properties of the nebulae correlate with the presence or strength of C iv “associated” absorption C^abs ^ ^em)* It is likely that the nebulae are the interstellar or circumgalactic medium of young or even protogalaxies being photoionized by QSO radiation that escapes anisotropically along the radio axis. -
Opacity Effects on Pulsations of Main-Sequence A-Type Stars
atoms Article Opacity Effects on Pulsations of Main-Sequence A-Type Stars Joyce A. Guzik * ID , Christopher J. Fontes and Chris Fryer ID Los Alamos National Laboratory, Los Alamos, NM 87545, USA; [email protected] (C.J.F.); [email protected] (C.F.) * Correspondence: [email protected] Received: 10 April 2018; Accepted: 11 May 2018 ; Published: 4 June 2018 Abstract: Opacity enhancements for stellar interior conditions have been explored to explain observed pulsation frequencies and to extend the pulsation instability region for B-type main-sequence variable stars. For these stars, the pulsations are driven in the region of the opacity bump of Fe-group elements at ∼200,000 K in the stellar envelope. Here we explore effects of opacity enhancements for the somewhat cooler main-sequence A-type stars, in which p-mode pulsations are driven instead in the second helium ionization region at ∼50,000 K. We compare models using the new LANL OPLIB vs. LLNL OPAL opacities for the AGSS09 solar mixture. For models of two solar masses and effective temperature 7600 K, opacity enhancements have only a mild effect on pulsations, shifting mode frequencies and/or slightly changing kinetic-energy growth rates. Increased opacity near the bump at 200,000 K can induce convection that may alter composition gradients created by diffusive settling and radiative levitation. Opacity increases around the hydrogen and 1st He ionization region (∼13,000 K) can cause additional higher-frequency p modes to be excited, raising the possibility that improved treatment of these layers may result in prediction of new modes that could be tested by observations. -
Eclipsing Systems with Pulsating Components (Types Β Cep, Δ Sct, Γ Dor Or Red Giant) in the Era of High-Accuracy Space Data
galaxies Review Eclipsing Systems with Pulsating Components (Types b Cep, d Sct, g Dor or Red Giant) in the Era of High-Accuracy Space Data Patricia Lampens Royal Observatory of Belgium, Ringlaan 3, 1180 Brussels, Belgium; [email protected] Abstract: Eclipsing systems are essential objects for understanding the properties of stars and stellar systems. Eclipsing systems with pulsating components are furthermore advantageous because they provide accurate constraints on the component properties, as well as a complementary method for pulsation mode determination, crucial for precise asteroseismology. The outcome of space missions aiming at delivering high-accuracy light curves for many thousands of stars in search of planetary systems has also generated new insights in the field of variable stars and revived the interest of binary systems in general. The detection of eclipsing systems with pulsating components has particularly benefitted from this, and progress in this field is growing fast. In this review, we showcase some of the recent results obtained from studies of eclipsing systems with pulsating components based on data acquired by the space missions Kepler or TESS. We consider different system configurations including semi-detached eclipsing binaries in (near-)circular orbits, a (near-)circular and non-synchronized eclipsing binary with a chemically peculiar component, eclipsing binaries showing the heartbeat phenomenon, as well as detached, eccentric double-lined systems. All display one or more pulsating component(s). Among the great variety of known classes of pulsating stars, we discuss unevolved or slightly evolved pulsators of spectral type B, A or F and red giants with solar-like oscillations. Some systems exhibit additional phenomena such as tidal effects, angular momentum transfer, (occasional) Citation: Lampens, P. -
Mètodes De Detecció I Anàlisi D'exoplanetes
MÈTODES DE DETECCIÓ I ANÀLISI D’EXOPLANETES Rubén Soussé Villa 2n de Batxillerat Tutora: Dolors Romero IES XXV Olimpíada 13/1/2011 Mètodes de detecció i anàlisi d’exoplanetes . Índex - Introducció ............................................................................................. 5 [ Marc Teòric ] 1. L’Univers ............................................................................................... 6 1.1 Les estrelles .................................................................................. 6 1.1.1 Vida de les estrelles .............................................................. 7 1.1.2 Classes espectrals .................................................................9 1.1.3 Magnitud ........................................................................... 9 1.2 Sistemes planetaris: El Sistema Solar .............................................. 10 1.2.1 Formació ......................................................................... 11 1.2.2 Planetes .......................................................................... 13 2. Planetes extrasolars ............................................................................ 19 2.1 Denominació .............................................................................. 19 2.2 Història dels exoplanetes .............................................................. 20 2.3 Mètodes per detectar-los i saber-ne les característiques ..................... 26 2.3.1 Oscil·lació Doppler ........................................................... 27 2.3.2 Trànsits -
Extragalactic Radio Jets
Annual Reviews www.annualreviews.org/aronline Ann. Rev. Astron.Astrophys. 1984. 22 : 319-58 Copyright© 1984 by AnnualReviews Inc. All rights reserved EXTRAGALACTIC RADIO JETS Alan H. Bridle National Radio AstronomyObservatory, 1 Charlottesville, Virginia 22901 Richard A. Perley National Radio Astronomy Observatory, Socorro, New Mexico 87801 1. INTRODUCTION Powerful extended extragalactic radio sources pose two vexing astro- physical problems [reviewed in (147) and (157)]. First, from what energy reservoir do they draw their large radio luminosities (as muchas 10a8 W between 10 MHzand 100 GHz)?Second, how does the active center in the parent galaxy or QSOsupply as muchas 10~4 J in relativistic particles and fields to radio "lobes" up to several hundredkiloparsecs outside the optical object? Newaperture synthesis arrays (68, 250) and new image-processing algorithms (66, 101, 202, 231) have recently allowed radio imaging subarcsecond resolution with high sensitivity and high dynamicrange; as a result, the complexityof the brighter sources has been revealed clearly for the first time. Manycontain radio jets, i.e. narrow radio features between compact central "cores" and more extended "lobe" emission. This review examinesthe systematic properties of such jets and the dues they give to the by PURDUE UNIVERSITY LIBRARY on 01/16/07. For personal use only. physics of energy transfer in extragalactic sources. Wedo not directly consider the jet production mechanism,which is intimately related to the Annu. Rev. Astro. Astrophys. 1984.22:319-358. Downloaded from arjournals.annualreviews.org first problemnoted above--for reviews, see (207) and (251). 1. i Why "’Jets"? Baade & Minkowski(3) first used the term jet in an extragalactic context, describing the train of optical knots extending ,-~ 20" from the nucleus of M87; the knots resemble a fluid jet breaking into droplets.