Meteor 23. Évf. 6. Sz. (1993.)
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Vssc163 Draftv3 IBVS 2 Colour Correct Graph.Pmd
British Astronomical Association VARIABLE STAR SECTION CIRCULAR No 163, March 2015 Contents IBVS 6080 – 6109 - J. Simpson ............................................... inside front cover From the Director - R. Pickard ........................................................................... 3 Polar V1432 Aquilae - Editor’s Note .................................................................. 4 Eclipsing Binary News - D. Loughney .............................................................. 4 Update on the Campaign to Observe the Dwarf Nova CSS 121005:212625+201948 - J. Shears ............... 6 How Variable Stars get Their Names - D. Griffin .............................................. 9 References to Naming of Variable Stars - D. Griffin ........................................ 11 The Discovery of Three New Variable Stars using the Bradford Robotic Telescope and the Software Package Muniwin - D. Conner .................. 12 FY Librae - a First Look at the Behaviour during 2014 - P. Williams .............. 16 FY Librae goes Active and Reaffirms the Howarth and Bailey Formula - J. Toone .............. 18 Refining the Period of V505 Scuti - I. Miller ................................................... 21 Binocular Programme - M. Taylor ................................................................... 21 Eclipsing Binary Predictions – Where to Find Them - D. Loughney .............. 22 Charges for Section Publications .............................................. inside back cover Guidelines for Contributing to the Circular ............................. -
August 13 2016 7:00Pm at the Herrett Center for Arts & Science College of Southern Idaho
Snake River Skies The Newsletter of the Magic Valley Astronomical Society www.mvastro.org Membership Meeting President’s Message Saturday, August 13th 2016 7:00pm at the Herrett Center for Arts & Science College of Southern Idaho. Public Star Party Follows at the Colleagues, Centennial Observatory Club Officers It's that time of year: The City of Rocks Star Party. Set for Friday, Aug. 5th, and Saturday, Aug. 6th, the event is the gem of the MVAS year. As we've done every Robert Mayer, President year, we will hold solar viewing at the Smoky Mountain Campground, followed by a [email protected] potluck there at the campground. Again, MVAS will provide the main course and 208-312-1203 beverages. Paul McClain, Vice President After the potluck, the party moves over to the corral by the bunkhouse over at [email protected] Castle Rocks, with deep sky viewing beginning sometime after 9 p.m. This is a chance to dig into some of the darkest skies in the west. Gary Leavitt, Secretary [email protected] Some members have already reserved campsites, but for those who are thinking of 208-731-7476 dropping by at the last minute, we have room for you at the bunkhouse, and would love to have to come by. Jim Tubbs, Treasurer / ALCOR [email protected] The following Saturday will be the regular MVAS meeting. Please check E-mail or 208-404-2999 Facebook for updates on our guest speaker that day. David Olsen, Newsletter Editor Until then, clear views, [email protected] Robert Mayer Rick Widmer, Webmaster [email protected] Magic Valley Astronomical Society is a member of the Astronomical League M-51 imaged by Rick Widmer & Ken Thomason Herrett Telescope Shotwell Camera https://herrett.csi.edu/astronomy/observatory/City_of_Rocks_Star_Party_2016.asp Calendars for August Sun Mon Tue Wed Thu Fri Sat 1 2 3 4 5 6 New Moon City Rocks City Rocks Lunation 1158 Castle Rocks Castle Rocks Star Party Star Party Almo, ID Almo, ID 7 8 9 10 11 12 13 MVAS General Mtg. -
The Transfiguration in the Theology of Gregory Palamas And
Duquesne University Duquesne Scholarship Collection Electronic Theses and Dissertations Spring 2015 Deus in se et Deus pro nobis: The rT ansfiguration in the Theology of Gregory Palamas and Its Importance for Catholic Theology Cory Hayes Follow this and additional works at: https://dsc.duq.edu/etd Recommended Citation Hayes, C. (2015). Deus in se et Deus pro nobis: The rT ansfiguration in the Theology of Gregory Palamas and Its Importance for Catholic Theology (Doctoral dissertation, Duquesne University). Retrieved from https://dsc.duq.edu/etd/640 This Immediate Access is brought to you for free and open access by Duquesne Scholarship Collection. It has been accepted for inclusion in Electronic Theses and Dissertations by an authorized administrator of Duquesne Scholarship Collection. For more information, please contact [email protected]. DEUS IN SE ET DEUS PRO NOBIS: THE TRANSFIGURATION IN THE THEOLOGY OF GREGORY PALAMAS AND ITS IMPORTANCE FOR CATHOLIC THEOLOGY A Dissertation Submitted to the McAnulty Graduate School of Liberal Arts Duquesne University In partial fulfillment of the requirements for the degree of Doctor of Philosophy By Cory J. Hayes May 2015 Copyright by Cory J. Hayes 2015 DEUS IN SE ET DEUS PRO NOBIS: THE TRANSFIGURATION IN THE THEOLOGY OF GREGORY PALAMAS AND ITS IMPORTANCE FOR CATHOLIC THEOLOGY By Cory J. Hayes Approved March 31, 2015 _______________________________ ______________________________ Dr. Bogdan Bucur Dr. Radu Bordeianu Associate Professor of Theology Associate Professor of Theology (Committee Chair) (Committee Member) _______________________________ Dr. Christiaan Kappes Professor of Liturgy and Patristics Saints Cyril and Methodius Byzantine Catholic Seminary (Committee Member) ________________________________ ______________________________ Dr. James Swindal Dr. -
Variable Star Classification and Light Curves Manual
Variable Star Classification and Light Curves An AAVSO course for the Carolyn Hurless Online Institute for Continuing Education in Astronomy (CHOICE) This is copyrighted material meant only for official enrollees in this online course. Do not share this document with others. Please do not quote from it without prior permission from the AAVSO. Table of Contents Course Description and Requirements for Completion Chapter One- 1. Introduction . What are variable stars? . The first known variable stars 2. Variable Star Names . Constellation names . Greek letters (Bayer letters) . GCVS naming scheme . Other naming conventions . Naming variable star types 3. The Main Types of variability Extrinsic . Eclipsing . Rotating . Microlensing Intrinsic . Pulsating . Eruptive . Cataclysmic . X-Ray 4. The Variability Tree Chapter Two- 1. Rotating Variables . The Sun . BY Dra stars . RS CVn stars . Rotating ellipsoidal variables 2. Eclipsing Variables . EA . EB . EW . EP . Roche Lobes 1 Chapter Three- 1. Pulsating Variables . Classical Cepheids . Type II Cepheids . RV Tau stars . Delta Sct stars . RR Lyr stars . Miras . Semi-regular stars 2. Eruptive Variables . Young Stellar Objects . T Tau stars . FUOrs . EXOrs . UXOrs . UV Cet stars . Gamma Cas stars . S Dor stars . R CrB stars Chapter Four- 1. Cataclysmic Variables . Dwarf Novae . Novae . Recurrent Novae . Magnetic CVs . Symbiotic Variables . Supernovae 2. Other Variables . Gamma-Ray Bursters . Active Galactic Nuclei 2 Course Description and Requirements for Completion This course is an overview of the types of variable stars most commonly observed by AAVSO observers. We discuss the physical processes behind what makes each type variable and how this is demonstrated in their light curves. Variable star names and nomenclature are placed in a historical context to aid in understanding today’s classification scheme. -
Are Dust Shell Models Well-Suited to Explain Interferometric Data of Late
Astronomy & Astrophysics manuscript no. 3722 November 13, 2018 (DOI: will be inserted by hand later) Are dust shell models well-suited to explain interferometric data of late-type stars in the near-infrared? P. Schuller1,2, P. Salom´e3, G. Perrin4, B. Mennesson5, G. Niccolini6, P. de Laverny6, S.T. Ridgway7,4, V. Coud´edu Foresto4, and W.A. Traub2 1 Max-Planck-Institut f¨ur Astronomie, K¨onigstuhl 17, 69117 Heidelberg, Germany 2 Harvard-Smithsonian Center for Astrophysics, MS-20, 60 Garden Street, Cambridge, MA 02138, USA 3 Observatoire de Paris, LERMA, 61 Avenue de l’Observatoire, 75014 Paris, France 4 Observatoire de Paris, LESIA, 5 Place Jules Janssen, 92195 Meudon, France 5 Jet Propulsion Laboratory, MS 306-388, 4800 Oak Grove Drive, Pasadena, CA 91109, USA 6 Observatoire de la Cˆote d’Azur, D´epartement Fresnel UMR 6528, BP 4229, 06304 Nice, France 7 National Optical Astronomy Observatories, P.O. Box 26732, Tucson, AZ 85726, USA Received ... / accepted ... Abstract. Recently available near-infrared interferometric data on late-type stars show a strong increase of diameter for asymp- totic giant branch (AGB) stars between the K (2.0 − 2.4 µm) and L (3.4 − 4.1 µm) bands. Aiming at an explanation of these findings, we chose the objects α Orionis (Betelgeuse), SW Virginis, and R Leonis, which are of different spectral types and stages of evolution, and which are surrounded by circumstellar envelopes with different optical thicknesses. For these stars, we compared observations with spherically symmetric dust shell models. Photometric and 11 µm interferometric data were also taken into account to further constrain the models. -
Orbital Elements of Double Stars
Orbital elements of double stars: ADS 1548 Marco Scardia, Jean-Louis Prieur, Luigi Pansecchi, Robert Argyle, Josefina Ling, Eric Aristidi, Alessio Zanutta, Lyu Abe, Philippe Bendjoya, Jean-Pierre Rivet, et al. To cite this version: Marco Scardia, Jean-Louis Prieur, Luigi Pansecchi, Robert Argyle, Josefina Ling, et al.. Orbital elements of double stars: ADS 1548. 2018, pp.1. hal-02357208 HAL Id: hal-02357208 https://hal.archives-ouvertes.fr/hal-02357208 Submitted on 23 Nov 2019 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. INTERNATIONAL ASTRONOMICAL UNION COMMISSION G1 (BINARY AND MULTIPLE STAR SYSTEMS) DOUBLE STARS INFORMATION CIRCULAR No. 194 (FEBRUARY 2018) NEW ORBITS ADS Name P T e Ω(2000) 2018 Author(s) α2000δ n a i ! Last ob. 2019 1548 A 819 AB 135y4 2011.06 0.548 153◦8 39◦7 000161 SCARDIA 01570+3101 2◦6587 000424 50◦5 189◦7 2017.833 49.4 0.163 et al. (*) - HDS 333 49.54 1981.14 0.60 252.6 253.8 0.542 TOKOVININ 02332-5156 7.2665 0.413 57.4 150.9 2018.073 255.7 0.519 - COU 691 61.76 1964.53 0.059 68.6 276.2 0.109 DOCOBO 03423+3141 5.8290 0.160 -
Astrometric Measurements of Seven Double Stars, September 2011 Report
Vol. 8 No. 1 January 1, 2012 Journal of Double Star Observations Page 40 Astrometric Measurements of Seven Double Stars, September 2011 Report Joseph M. Carro Cuesta College San Luis Obispo, California Abstract: From my residence in Paso Robles, California, measurements of the separation and position angle of seven double stars were made. Listed in chronological order, the dou- ble stars were Zeta Ursae Majoris, Zeta Lyrae, Epsilon Delphini, SAO 105104 in Sagitta, STF 2840 in Cepheus, 61 Cygni, and 17 Cygni. The two goals of this project were to meas- ure the position angle and separation of the aforementioned double stars, and to learn the necessary techniques to conduct this research. Methodology My observations were made from my home in Paso Robles, California (located at approximately 35o37’36” N and 120o41’24” W) using a Celestron model CPC 1100 telescope (Figure 1). The telescope is computerized, motorized, and was fitted with a Celestron Micro Guide 12.5 mm astrometric eye- piece. The telescope is of Schmidt-Cassegrain de- sign, with aperture of 11 inches on an alt-azimuth mount. The manufacturer reports a focal length of 2,800 mm. The Micro Guide eyepiece was oriented with the celestial coordinate system using the primary star of the double star under study. The primary star was positioned on the mark 30, the drive was disabled, and the star was permitted to drift to the outer cir- cle. The scale was rotated until the star lay on the 270 degree mark. The accuracy of this setting was verified by positioning the primary star on the 90 degree mark of the outer circular scale, and allowing the star to drift to the 270 degree mark. -
Astronomical Coordinate Systems
Appendix 1 Astronomical Coordinate Systems A basic requirement for studying the heavens is being able to determine where in the sky things are located. To specify sky positions, astronomers have developed several coordinate systems. Each sys- tem uses a coordinate grid projected on the celestial sphere, which is similar to the geographic coor- dinate 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 The equatorial coordinate system is probably the most widely used celestial coordinate system. It is also the most closely related to the geographic coordinate system because they use the same funda- mental plane and poles. The projection of the Earth’s equator onto the celestial sphere is called the celestial equator. Similarly, projecting the geographic poles onto the celestial sphere defines the north and south celestial poles. However, there is an important difference between the equatorial and geographic coordinate sys- tems: the geographic system is fixed to the Earth and 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 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. -
A L B I R E O 1999
XIX. évfolyam, 2. szám 1999. június ALBIREO Alapította: Szentmártoni Béla Szerkeszti: Juhász Tibor ALBIREO MAGYAR ÉGHAJLATVÁLTOZÁST AMATÕRCSILLAGÁSZ KLUB MEGFIGYELÕ HÁLÓZAT Zalaegerszeg, Nemzetõr u. 8. Vác, Pf. 184. H-8900 (Hungary) H-2234 (Hungary) e-mail: [email protected] e-mail: [email protected] http://alpha.dfmk.hu/~albireo CÍMLAPUNKON: Csillagtúra a Cygnus-ban - a cikk illusztrációja TARTALOM CONTENTS Nap (Zelkó Z.) 2 Sun Observations 2 Bótz Zs.: Hogyan deríthetjük fel a How Can We Found the Sources savas esõ forrásait? 6 of the Acid Rain? 6 A szennyezõ anyagok sorsa Accumulation of the Pollutants a táplálékláncban 8 in the Food-Chain 8 C.A. Wood: A Plato titkai 11 The Mysteries of Plato 11 Üstökösök 12 Comet Observations 12 P. Harrington: Kedvenc aszterizmusaim 13 My Favorite Asterisms 13 Juhász T.: Baseball-pálya a Cygnus-ban 16 The Cygnus Baseball Diamond 16 A. MacRobert: Csillagtúra a Cygnus-ban 18 A Cygnus Star-Hop 18 Kettõscsillagok 20 Double Star Observations 20 Észlelõ amatõrcsillagászok és amatõrmete- Albireo is the circulaire of the Hungarian Albi- orológusok körlevele. Az amatõrök megfigye- reo Amateur Astronomy Society and the Hun- léseikért cserébe kapják. Más érdeklõdõk a garian Climate Changes Observations Network. szerkesztõ címén rendelhetik meg. Megfigyelési Subscription fee 10 USD or 20 DM for a year. tájékoztatók, csillagatlaszok, katalógusok is a Despite money order or cash exchange maga- szerkesztõtõl kérhetõk. zines or other publications are prefered. Kiadja: a Göncöl Alapítvány (Vác) és a Zrínyi Miklós Gimnázium (Zalaegerszeg) Felelõs kiadó: Kiszel Vilmos A kiadványt Zalaegerszeg Megyei Jogú Város Önkormányzatának Közgyûlése támogatja. NAP Összeállította: Zelkó Zoltán 1998 elsõ félévében már igazán nem panasz- a foltok, jelezvén az aktivitás vizsgált idõszakon kodhattak észlelõink, bõven akadt látnivaló a is túlmutató, gyors erõsödését. -
Read Full Text (PDF)
Gas infall and possible circumstellar rotation in R Leonis Downloaded from: https://research.chalmers.se, 2021-10-02 00:25 UTC Citation for the original published paper (version of record): Fonfria, J., Santander-Garcia, M., Cernicharo, J. et al (2019) Gas infall and possible circumstellar rotation in R Leonis Astronomy and Astrophysics, 622 http://dx.doi.org/10.1051/0004-6361/201834840 N.B. When citing this work, cite the original published paper. research.chalmers.se offers the possibility of retrieving research publications produced at Chalmers University of Technology. It covers all kind of research output: articles, dissertations, conference papers, reports etc. since 2004. research.chalmers.se is administrated and maintained by Chalmers Library (article starts on next page) A&A 622, L14 (2019) Astronomy https://doi.org/10.1051/0004-6361/201834840 & c ESO 2019 Astrophysics LETTER TO THE EDITOR Gas infall and possible circumstellar rotation in R Leonis? J. P. Fonfría1, M. Santander-García2, J. Cernicharo1, L. Velilla-Prieto3, M. Agúndez1, N. Marcelino1, and G. Quintana-Lacaci1 1 Molecular Astrophysics Group, Instituto de Física Fundamental, CSIC, C/ Serrano, 123, 28006 Madrid, Spain e-mail: [email protected] 2 Observatorio Astronómico Nacional, OAN-IGN, Alfonso XII, 3, 28014 Madrid, Spain 3 Dept. of Space, Earth, and Environment, Astronomy and Plasma Physics Division, Chalmers University of Technology, Onsala Space Observatory, 439 92 Onsala, Sweden Received 12 December 2018 / Accepted 6 February 2019 ABSTRACT We present new interferometer molecular observations of R Leo taken at 1.2 mm with the Atacama Large Millimeter Array with an angular resolution up to '000: 026. -
April 2016 BRAS Newsletter
April 2016 Issue th Next Meeting: Monday, April 11 at 7PM at HRPO (2nd Mondays, Highland Road Park Observatory) April 6th through April 10th is our annual Hodges Gardens Star Party. You can pre-register using the form on the BRAS website. If you have never attended this star party, make plans to attend this one. What's In This Issue? President’s Message Photos: BRAS Telescope donated to EBRP Library Secretary's Summary of March Meeting Recent BRAS Forum Entries 20/20 Vision Campaign Message from the HRPO Astro Short: Stellar Dinosaurs? International Astronomy Day Observing Notes: Leo The Lion, by John Nagle Newsletter of the Baton Rouge Astronomical Society April 2016 Page 2 President’s Message There were 478 people who stopped by the BRAS display at the March 19th ―Rockin at the Swamp‖ event at the Bluebonnet Swamp and Nature Center. I give thanks to all our volunteers for our success in this outreach event. April 6th through April 10th is our annual Hodges Gardens Star Party. You can pre-register on the BRAS website, or register when you arrive (directions are on the BRAS website). If you have never attended a star party, of if you are an old veteran star partier; make plans to attend this one. Our Guest Speaker for the BRAS meeting on April 11th will be Dr. Joseph Giaime, Observatory Head, LIGO Livingston (Caltech), Professor of Physics and Astronomy (LSU). Yes, he will be talking about gravity waves and the extraordinary discovery LIGO has made. We need volunteers to help at our display on Earth Day on Sunday, April 17th. -
Astronomical Optical Interferometry, II
Serb. Astron. J. } 183 (2011), 1 - 35 UDC 520.36{14 DOI: 10.2298/SAJ1183001J Invited review ASTRONOMICAL OPTICAL INTERFEROMETRY. II. ASTROPHYSICAL RESULTS S. Jankov Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia E{mail: [email protected] (Received: November 24, 2011; Accepted: November 24, 2011) SUMMARY: Optical interferometry is entering a new age with several ground- based long-baseline observatories now making observations of unprecedented spatial resolution. Based on a great leap forward in the quality and quantity of interfer- ometric data, the astrophysical applications are not limited anymore to classical subjects, such as determination of fundamental properties of stars; namely, their e®ective temperatures, radii, luminosities and masses, but the present rapid devel- opment in this ¯eld allowed to move to a situation where optical interferometry is a general tool in studies of many astrophysical phenomena. Particularly, the advent of long-baseline interferometers making use of very large pupils has opened the way to faint objects science and ¯rst results on extragalactic objects have made it a reality. The ¯rst decade of XXI century is also remarkable for aperture synthesis in the visual and near-infrared wavelength regimes, which provided image reconstruc- tions from stellar surfaces to Active Galactic Nuclei. Here I review the numerous astrophysical results obtained up to date, except for binary and multiple stars milli- arcsecond astrometry, which should be a subject of an independent detailed review, taking into account its importance and expected results at micro-arcsecond precision level. To the results obtained with currently available interferometers, I associate the adopted instrumental settings in order to provide a guide for potential users concerning the appropriate instruments which can be used to obtain the desired astrophysical information.