Curriculum Vitae M.Oksala 2
Total Page：16
File Type：pdf, Size：1020Kb
Load more
Recommended publications
-
BAV Rundbrief Nr. 3 (2014)
BAV Rundbrief 2014 | Nr. 3 | 63. Jahrgang | ISSN 0405-5497 Bundesdeutsche Arbeitsgemeinschaft für Veränderliche Sterne e.V. (BAV) BAV Rundbrief 2014 | Nr. 3 | 63. Jahrgang | ISSN 0405-5497 Table of Contents G. Maintz Revised elements of AP CVn and BH Ser 137 R. Gröbel Lightcurve and period of four RR Lyrae stars in Ursa Major: AG UMa, AV UMa, BK UMa and CK UMa 139 Inhaltsverzeichnis G. Maintz Verbesserte Elemente von AP CVn und BH Ser 137 R. Gröbel Lichtkurve und Periode von vier RR-Lyrae-Sternen in Ursa Major: AG UMa, AV UMa, BK UMa und CK UMa 139 Beobachtungsberichte D. Böhme Ist MP Gem ein Bedeckungsveränderlicher? 146 E. Pollmann / Zwischenergebnisse der 28-Tau-Kampagne 149 W. Vollmann F. Vohla U Orionis - ein (B-R)-Schelm 152 K. Wenzel Visuelle Lichtkurve von S5 0716+71 für den Beobachtungszeit- raum von August 2013 bis April 2014 154 K. Bernhard / Datamining leicht gemacht: Onlinekataloge für Einsteiger 155 S. Hümmerich Aus der Literatur Uni Bonn Spektakuläre Doppelexplosion am Sternenhimmel 161 E. Wischnewski Beobachtungsaufruf für Eta Orionis 163 Aus der BAV D. Bannuscher Neuigkeiten aus dem BAV-Vereinsleben 164 BAV-Vorstand BAV-Tagung Programmpunkte 165 D. Bannuscher Veränderlichenbeobachter-Treffen 2014 in Hartha 167 J. Hübscher Die systematische Überwachung veränderlicher Sterne durch BAV-Beobachter 170 W. Braune Veränderliche Sterne in „Sterne und Weltraum“ 174 T. Lange Rudolf Obertrifter ist verstorben 175 P. Reinhard Erlebnisbericht Namibia 2014 176 Aus den Sektionen F. Walter Bericht der Sektion „Bedeckungsveränderliche“ 2012 - 2014 178 G. Maintz Bericht der Sektion RR-Lyrae-Sterne 2012 - 2014 179 G. Monninger Bericht der Sektion Delta-Scuti-Sterne 2012 - 2014 180 R. -
Winter Constellations
Winter Constellations *Orion *Canis Major *Monoceros *Canis Minor *Gemini *Auriga *Taurus *Eradinus *Lepus *Monoceros *Cancer *Lynx *Ursa Major *Ursa Minor *Draco *Camelopardalis *Cassiopeia *Cepheus *Andromeda *Perseus *Lacerta *Pegasus *Triangulum *Aries *Pisces *Cetus *Leo (rising) *Hydra (rising) *Canes Venatici (rising) Orion--Myth: Orion, the great hunter. In one myth, Orion boasted he would kill all the wild animals on the earth. But, the earth goddess Gaia, who was the protector of all animals, produced a gigantic scorpion, whose body was so heavily encased that Orion was unable to pierce through the armour, and was himself stung to death. His companion Artemis was greatly saddened and arranged for Orion to be immortalised among the stars. Scorpius, the scorpion, was placed on the opposite side of the sky so that Orion would never be hurt by it again. To this day, Orion is never seen in the sky at the same time as Scorpius. DSO’s ● ***M42 “Orion Nebula” (Neb) with Trapezium A stellar nursery where new stars are being born, perhaps a thousand stars. These are immense clouds of interstellar gas and dust collapse inward to form stars, mainly of ionized hydrogen which gives off the red glow so dominant, and also ionized greenish oxygen gas. The youngest stars may be less than 300,000 years old, even as young as 10,000 years old (compared to the Sun, 4.6 billion years old). 1300 ly. 1 ● *M43--(Neb) “De Marin’s Nebula” The star-forming “comma-shaped” region connected to the Orion Nebula. ● *M78--(Neb) Hard to see. A star-forming region connected to the Orion Nebula. -
Winter Observing Notes
Wynyard Planetarium & Observatory Winter Observing Notes Wynyard Planetarium & Observatory PUBLIC OBSERVING – Winter Tour of the Sky with the Naked Eye NGC 457 CASSIOPEIA eta Cas Look for Notice how the constellations 5 the ‘W’ swing around Polaris during shape the night Is Dubhe yellowish compared 2 Polaris to Merak? Dubhe 3 Merak URSA MINOR Kochab 1 Is Kochab orange Pherkad compared to Polaris? THE PLOUGH 4 Mizar Alcor Figure 1: Sketch of the northern sky in winter. North 1. On leaving the planetarium, turn around and look northwards over the roof of the building. To your right is a group of stars like the outline of a saucepan standing up on it’s handle. This is the Plough (also called the Big Dipper) and is part of the constellation Ursa Major, the Great Bear. The top two stars are called the Pointers. Check with binoculars. Not all stars are white. The colour shows that Dubhe is cooler than Merak in the same way that red-hot is cooler than white-hot. 2. Use the Pointers to guide you to the left, to the next bright star. This is Polaris, the Pole (or North) Star. Note that it is not the brightest star in the sky, a common misconception. Below and to the right are two prominent but fainter stars. These are Kochab and Pherkad, the Guardians of the Pole. Look carefully and you will notice that Kochab is slightly orange when compared to Polaris. Check with binoculars. © Rob Peeling, CaDAS, 2007 version 2.0 Wynyard Planetarium & Observatory PUBLIC OBSERVING – Winter Polaris, Kochab and Pherkad mark the constellation Ursa Minor, the Little Bear. -
Rochester Skies
A S T R O N O M Y Rochester Skies First Newsletter ¨ Freezing Star-Party ¨ March Over Rochester ¨ Constellation Prize Rochester Astronomy Club Newsletter Issue #1 Winter ‘06 RAC Grows Up Constellation Prize Star Party The Rochester Astron- From our favorite Our coldest month omy Club has been meeting segment, turns out one of growing. As the size Randy Hemann will our best attended increases, so do the lead us by the optics Star Parties. Dean possibilities. If you are through the constel- Johnson fills us in on curious what RAC is lation Hydra, point- Eagle Bluff January. all about, take a look at ing out deep sky gems “Who We Are...” along the way. Page 1 Page 3 Page 4 ing to feel some growing pains. First Newsletter We appreciate feedback and Rochester Skies Welcome to the first newsletter of the encourage participation. If you Contents Rochester Astronomy Club. We hope have ideas, articles or images, March Over Rochester Pg 2 you find it fun and informative. You please submit them. Hunting the Hunter Pg 8 might even want to keep it around— It’s a Little Known Fact Pg 11 could be worth something someday! “Rochester Skies In the Beginning is a newsletter by the Pg 11 We hope this newsletter will be- club, for the club.” Satellite Satellbright Pg 10 come a source of anticipation for Up-Coming Events Pg 12 our members. As we ramp up If you have questions, comments or material for the Rochester Skies newsletter, our editorial process, we are go- please contact our lead editor Duane Deal at [email protected] A. -
Educator's Guide: Orion
Legends of the Night Sky Orion Educator’s Guide Grades K - 8 Written By: Dr. Phil Wymer, Ph.D. & Art Klinger Legends of the Night Sky: Orion Educator’s Guide Table of Contents Introduction………………………………………………………………....3 Constellations; General Overview……………………………………..4 Orion…………………………………………………………………………..22 Scorpius……………………………………………………………………….36 Canis Major…………………………………………………………………..45 Canis Minor…………………………………………………………………..52 Lesson Plans………………………………………………………………….56 Coloring Book…………………………………………………………………….….57 Hand Angles……………………………………………………………………….…64 Constellation Research..…………………………………………………….……71 When and Where to View Orion…………………………………….……..…77 Angles For Locating Orion..…………………………………………...……….78 Overhead Projector Punch Out of Orion……………………………………82 Where on Earth is: Thrace, Lemnos, and Crete?.............................83 Appendix………………………………………………………………………86 Copyright©2003, Audio Visual Imagineering, Inc. 2 Legends of the Night Sky: Orion Educator’s Guide Introduction It is our belief that “Legends of the Night sky: Orion” is the best multi-grade (K – 8), multi-disciplinary education package on the market today. It consists of a humorous 24-minute show and educator’s package. The Orion Educator’s Guide is designed for Planetarians, Teachers, and parents. The information is researched, organized, and laid out so that the educator need not spend hours coming up with lesson plans or labs. This has already been accomplished by certified educators. The guide is written to alleviate the fear of space and the night sky (that many elementary and middle school teachers have) when it comes to that section of the science lesson plan. It is an excellent tool that allows the parents to be a part of the learning experience. The guide is devised in such a way that there are plenty of visuals to assist the educator and student in finding the Winter constellations. -
Arxiv:Astro-Ph/0505234V1 11 May 2005 Eouini U Nesadn Fpaeaysses the Systems
GIANT PLANET MIGRATION THROUGH THE ACTION OF DISK TORQUES AND PLANET-PLANET SCATTERING Althea V. Moorhead1 and Fred C. Adams1,2 1Michigan Center for Theoretical Physics Physics Department, University of Michigan, Ann Arbor, MI 48109 2Astronomy Department, University of Michigan, Ann Arbor, MI 48109 ABSTRACT This paper presents a parametric study of giant planet migration through the com- bined action of disk torques and planet-planet scattering. The torques exerted on plan- ets during Type II migration in circumstellar disks readily decrease the semi-major axes a, whereas scattering between planets increases the orbital eccentricities ǫ. This paper presents a parametric exploration of the possible parameter space for this migration scenario using two (initial) planetary mass distributions and a range of values for the time scale of eccentricity damping (due to the disk). For each class of systems, many realizations of the simulations are performed in order to determine the distributions of the resulting orbital elements of the surviving planets; this paper presents the results of 8500 numerical experiments. Our goal is to study the physics of this particular mi- ∼ gration mechanism and to test it against observations of extrasolar planets. The action of disk torques and planet-planet scattering results in a distribution of final orbital ele- ments that fills the a ǫ plane, in rough agreement with the orbital elements of observed − extrasolar planets. In addition to specifying the orbital elements, we characterize this migration mechanism by finding the percentages of ejected and accreted planets, the number of collisions, the dependence of outcomes on planetary masses, the time spent arXiv:astro-ph/0505234v1 11 May 2005 in 2:1 and 3:1 resonances, and the effects of the planetary IMF. -
List of Easy Double Stars for Winter and Spring = Easy = Not Too Difficult = Difficult but Possible
List of Easy Double Stars for Winter and Spring = easy = not too difficult = difficult but possible 1. Sigma Cassiopeiae (STF 3049). 23 hr 59.0 min +55 deg 45 min This system is tight but very beautiful. Use a high magnification (150x or more). Primary: 5.2, yellow or white Seconary: 7.2 (3.0″), blue 2. Eta Cassiopeiae (Achird, STF 60). 00 hr 49.1 min +57 deg 49 min This is a multiple system with many stars, but I will restrict myself to the brightest one here. Primary: 3.5, yellow. Secondary: 7.4 (13.2″), purple or brown 3. 65 Piscium (STF 61). 00 hr 49.9 min +27 deg 43 min Primary: 6.3, yellow Secondary: 6.3 (4.1″), yellow 4. Psi-1 Piscium (STF 88). 01 hr 05.7 min +21 deg 28 min This double forms a T-shaped asterism with Psi-2, Psi-3 and Chi Piscium. Psi-1 is the uppermost of the four. Primary: 5.3, yellow or white Secondary: 5.5 (29.7), yellow or white 5. Zeta Piscium (STF 100). 01 hr 13.7 min +07 deg 35 min Primary: 5.2, white or yellow Secondary: 6.3, white or lilac (or blue) 6. Gamma Arietis (Mesarthim, STF 180). 01 hr 53.5 min +19 deg 18 min “The Ram’s Eyes” Primary: 4.5, white Secondary: 4.6 (7.5″), white 7. Lambda Arietis (H 5 12). 01 hr 57.9 min +23 deg 36 min Primary: 4.8, white or yellow Secondary: 6.7 (37.1″), silver-white or blue 8. -
Discovery of a Magnetic Field in the Early B-Type Star Sigma Lupi
Astronomy & Astrophysics manuscript no. Henrichs˙sigmaLup˙Printed c ESO 2018 July 10, 2018 Discovery of a magnetic field in the early B-type star σ Lupi⋆ H.F. Henrichs1,2, K. Kolenberg3,4, B. Plaggenborg1, S.C. Marsden5,6, I.A. Waite7, J.D. Landstreet8,9, G.A. Wade10, J.H. Grunhut10, M.E. Oksala11, and the MiMeS collaboration 1 Astronomical Institute ’Anton Pannekoek’, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, Netherlands 2 Department of Astrophysics/IMAPP Radboud University Nijmegen, P.O. Box 9010, 6500 GL Nijmegen, Netherlands 3 Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge MA 02138, USA 4 Instituut voor Sterrenkunde, K. U. Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium 5 Australian Astronomical Observatory, PO Box 296, Epping, NSW 1710, Australia 6 Centre for Astronomy, School of Engineering and Physical Sciences, James Cook University, Townsville, 4811, Australia 7 Faculty of Sciences, University of Southern Queensland, Toowoomba, Qld 4350 Australia 8 Dept. of Physics and Astronomy, University of Western Ontario, London, ON N6A 3K7 Canada 9 Armagh Observatory, College Hill, Armagh, Northern Ireland BT61 9DG 10 Dept. of Physics, Royal Military College of Canada, PO Box 17000, Station Forces, Kingston, Ontario, Canada 11 Dept. of Physics and Astronomy, University of Delaware, Newark, DE, USA Received date / Accepted date ABSTRACT Context. Magnetic early B-type stars are rare. Indirect indicators are needed to identify them before investing in time-intensive spectropolari- metric observations. Aims. We use the strongest indirect indicator of a magnetic field in B stars, which is periodic variability of ultraviolet (UV) stellar wind lines occurring symmetric about the approximate rest wavelength. -
THE ORION CONSTELLATION the Great Hunter Orion Constellation Lies in the Northern Sky, on the Celestial Equator
THE ORION CONSTELLATION the Great Hunter Orion constellation lies in the northern sky, on the celestial equator. It is one of the brightest and best known constellations in the night sky. Orion is also known as the Hunter: it is associated with one in mythology. The constellation represents the mythical hunter Orion, who is often depicted in star maps as either facing the charge of Taurus, the bull, or chasing after the hare (constellation Lepus) with his two hunting dogs, represented by the nearby constellations Canis Major and Canis Minor. The constellation contains two of the ten brightest stars in the sky – Rigel (Beta Orionis) and Betelgeuse (Alpha Orionis) – a number of famous nebulae – the Orion Nebula, De Mairan’s Nebula and the Horsehead Nebula, among others, and one of the most prominent asterisms in the night sky – Orion’s Belt. FACTS • Orion is the 26th constellation in size, occupying an area of 594 square degrees. • It is located in the first quadrant of the northern hemisphere (NQ1) and can be seen at latitudes between +85° and -75°. • The neighboring constellations are Eridanus, Gemini, Lepus, Monoceros and Taurus. • Orion contains three Messier objects – M42, (NGC 1976) The Orion Nebula, M43, (NGC 1982) De Mairan’s Nebula, and M78, (NGC 2068) • It has seven stars with known planets. • There are two meteor showers associated with Orion, the Orionids and the Chi Orionids. The Orionid meteor shower reaches its peak around October 21 every year • Orion belongs to the Orion family of constellations, along with Canis Major, Canis Minor, Lepus and Monoceros MYTH The constellation Orion has its origins in Sumerian mythology, specifically in the myth of Gilgamesh. -
Probing Dust Grain Evolution in IM Lupi's Circumstellar Disc
A&A 489, 633–650 (2008) Astronomy DOI: 10.1051/0004-6361:200810121 & c ESO 2008 Astrophysics Probing dust grain evolution in IM Lupi’s circumstellar disc Multi-wavelength observations and modelling of the dust disc C. Pinte1,2,D.L.Padgett3, F. Ménard2, K. R. Stapelfeldt4,G.Schneider5, J. Olofsson2,O.Panic´ 6,J.C.Augereau2, G. Duchêne2,7, J. Krist4, K. Pontoppidan8, M. D. Perrin9,C.A.Grady10, J. Kessler-Silacci11,E.F.vanDishoeck6,12, D. Lommen6, M. Silverstone13,D.C.Hines14,S.Wolf15,G.A.Blake8, T. Henning16, and B. Stecklum17 1 School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, UK e-mail: [email protected] 2 Laboratoire d’Astrophysique de Grenoble, CNRS/UJF UMR 5571, 414 rue de la Piscine, BP 53, 38041 Grenoble Cedex 9, France 3 Spitzer Science Center, Caltech, Pasadena, CA 91125, USA 4 Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA 5 Steward Observatory, The University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA 6 Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, The Netherlands 7 Astronomy Dept, UC Berkeley, Berkeley CA 94720-3411, USA 8 Division of Geological and Planetary Sciences 150-21, California Institute of Technology, Pasadena, CA 91125, USA 9 Department of Physics and Astronomy, UCLA, Los Angeles, CA 90095-1562, USA 10 Eureka Scientific and Goddard Space Flight Center, Code 667, Greenbelt, MD 20771, USA 11 The University of Texas at Austin, Department of Astronomy, 1 University Station C1400, Austin, Texas 78712–0259, USA 12 Max Planck -
Betelgeuse and the Crab Nebula
The monthly newsletter of the Temecula Valley Astronomers Feb 2020 Events: General Meeting : Monday, February 3rd, 2020 at the Ronald H. Roberts Temecula Library, Room B, 30600 Pauba Rd, at 7:00 PM. On the agenda this month is “What’s Up” by Sam Pitts, “Mission Briefing” by Clark Williams then followed by a presentation topic : “A History of Palomar Observatory” by Curtis Oort Cloud in Perspective. Credit NASA / JPL- Croulet. Refreshments by Chuck Caltech Dyson. Please consider helping out at one of the many Star Parties coming up over the next few months. For General information: the latest schedule, check the Subscription to the TVA is included in the annual $25 Calendar on the web page. membership (regular members) donation ($9 student; $35 family). President: Mark Baker 951-691-0101 WHAT’S INSIDE THIS MONTH: <[email protected]> Vice President: Sam Pitts <[email protected]> Cosmic Comments Past President: John Garrett <[email protected]> by President Mark Baker Treasurer: Curtis Croulet <[email protected]> Looking Up Redux Secretary: Deborah Baker <[email protected]> Club Librarian: Vacant compiled by Clark Williams Facebook: Tim Deardorff <[email protected]> Darkness Star Party Coordinator and Outreach: Deborah Baker by Mark DiVecchio <[email protected]> Betelgeuse and the Crab Nebula: Stellar Death and Rebirth Address renewals or other correspondence to: Temecula Valley Astronomers by David Prosper PO Box 1292 Murrieta, CA 92564 Send newsletter submissions to Mark DiVecchio th <[email protected]> by the 20 of the month -
Observer Page 2 of 12
AAAssstttrrrooonnnooomyyy CCCllluuubbb ooofff TTTuuulllsssaaa OOOOOObbbbbbsssssseeeeeerrrrrrvvvvvveeeeeerrrrrr January 2009 Picture of the Month Mirach’s Ghost – NGC 404 / Herschel II-224 As far as ghosts go, Mirach's Ghost isn't really that scary. In fact, Mirach's Ghost is just a faint, fuzzy galaxy, well known to astronomers, that happens to be seen nearly along the line-of-sight to Mirach, a bright star. Centered in this star field, Mirach is also called Beta Andromedae. About 200 light-years distant, Mirach is a red giant star, cooler than the Sun but much larger and so intrinsically much brighter than our parent star. In most telescopic views, glare and diffraction spikes tend to hide things that lie near Mirach and make the faint, fuzzy galaxy look like a ghostly internal reflection of the almost overwhelming starlight. Still, appearing in this sharp image just above and to the right, Mirach's Ghost is cataloged as galaxy NGC 404 and is estimated to be some 10 million light-years away. – Explanation from APOD/NASA Credit & Copyright – Anthony Ayiomamitis (Athens, Greece) Website = http://www.perseus.gr/ & eMail = [email protected] Inside This Issue: Important ACT Upcoming Dates: Vice President's Message - p2 IYoA - - - - - - - - - - - - - - - p6 Public Star Party… Fri. January 2, 2009 (p11) Word Search Puzzle - - - - p3 Virtual Moon Atlas - - - - - - p7 ACT Meeting @ TCC - Fri. January 9, ( 7pm ) January Stars - - - - - - - - p4 Observing Pages - - - - pp 8- 9 Members Only Star Party … Fri. January 23, 2009 Planetarium News - - - - - p5 Land’s Tidbits - - - - - - - - p10 ACT Observer Page 2 of 12 Vice President’s Message by Tom Mcdonough Happy New Year to everyone, we have a very exciting year ahead of us! 2009 is the International Year of Astronomy in celebration of the 400th anniversary of Galileo’s observations of the heavens with one of the first telescopes.