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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. -
Searching for Dark Matter Annihilation in Recently Discovered Milky Way Satellites with Fermi-Lat A
The Astrophysical Journal, 834:110 (15pp), 2017 January 10 doi:10.3847/1538-4357/834/2/110 © 2017. The American Astronomical Society. All rights reserved. SEARCHING FOR DARK MATTER ANNIHILATION IN RECENTLY DISCOVERED MILKY WAY SATELLITES WITH FERMI-LAT A. Albert1, B. Anderson2,3, K. Bechtol4, A. Drlica-Wagner5, M. Meyer2,3, M. Sánchez-Conde2,3, L. Strigari6, M. Wood1, T. M. C. Abbott7, F. B. Abdalla8,9, A. Benoit-Lévy10,8,11, G. M. Bernstein12, R. A. Bernstein13, E. Bertin10,11, D. Brooks8, D. L. Burke14,15, A. Carnero Rosell16,17, M. Carrasco Kind18,19, J. Carretero20,21, M. Crocce20, C. E. Cunha14,C.B.D’Andrea22,23, L. N. da Costa16,17, S. Desai24,25, H. T. Diehl5, J. P. Dietrich24,25, P. Doel8, T. F. Eifler12,26, A. E. Evrard27,28, A. Fausti Neto16, D. A. Finley5, B. Flaugher5, P. Fosalba20, J. Frieman5,29, D. W. Gerdes28, D. A. Goldstein30,31, D. Gruen14,15, R. A. Gruendl18,19, K. Honscheid32,33, D. J. James7, S. Kent5, K. Kuehn34, N. Kuropatkin5, O. Lahav8,T.S.Li6, M. A. G. Maia16,17, M. March12, J. L. Marshall6, P. Martini32,35, C. J. Miller27,28, R. Miquel21,36, E. Neilsen5, B. Nord5, R. Ogando16,17, A. A. Plazas26, K. Reil15, A. K. Romer37, E. S. Rykoff14,15, E. Sanchez38, B. Santiago16,39, M. Schubnell28, I. Sevilla-Noarbe18,38, R. C. Smith7, M. Soares-Santos5, F. Sobreira16, E. Suchyta12, M. E. C. Swanson19, G. Tarle28, V. Vikram40, A. R. Walker7, and R. H. Wechsler14,15,41 (The Fermi-LAT and DES Collaborations) 1 Los Alamos National Laboratory, Los Alamos, NM 87545, USA; [email protected], [email protected] 2 Department of Physics, Stockholm University, AlbaNova, SE-106 91 Stockholm, Sweden; [email protected] 3 The Oskar Klein Centre for Cosmoparticle Physics, AlbaNova, SE-106 91 Stockholm, Sweden 4 Dept. -
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. -
Arxiv:1806.02345V2 [Astro-Ph.GA] 18 Feb 2019
Draft version February 20, 2019 Preprint typeset using LATEX style emulateapj v. 12/16/11 PROPER MOTIONS OF MILKY WAY ULTRA-FAINT SATELLITES WITH Gaia DR2 × DES DR1 Andrew B. Pace1,4 and Ting S. Li2,3 1 George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, and Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, USA 2 Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USA and 3 Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA Draft version February 20, 2019 ABSTRACT We present a new, probabilistic method for determining the systemic proper motions of Milky Way (MW) ultra-faint satellites in the Dark Energy Survey (DES). We utilize the superb photometry from the first public data release (DR1) of DES to select candidate members, and cross-match them with the proper motions from Gaia DR2. We model the candidate members with a mixture model (satellite and MW) in spatial and proper motion space. This method does not require prior knowledge of satellite membership, and can successfully determine the tangential motion of thirteen DES satellites. With our method we present measurements of the following satellites: Columba I, Eridanus III, Grus II, Phoenix II, Pictor I, Reticulum III, and Tucana IV; this is the first systemic proper motion measurement for several and the majority lack extensive spectroscopic follow-up studies. We compare these to the predictions of Large Magellanic Cloud satellites and to the vast polar structure. With the high precision DES photometry we conclude that most of the newly identified member stars are very metal-poor ([Fe/H] . -
Sydney Observatory Night Sky Map September 2012 a Map for Each Month of the Year, to Help You Learn About the Night Sky
Sydney Observatory night sky map September 2012 A map for each month of the year, to help you learn about the night sky www.sydneyobservatory.com This star chart shows the stars and constellations visible in the night sky for Sydney, Melbourne, Brisbane, Canberra, Hobart, Adelaide and Perth for September 2012 at about 7:30 pm (local standard time). For Darwin and similar locations the chart will still apply, but some stars will be lost off the southern edge while extra stars will be visible to the north. Stars down to a brightness or magnitude limit of 4.5 are shown. To use this chart, rotate it so that the direction you are facing (north, south, east or west) is shown at the bottom. The centre of the chart represents the point directly above your head, called the zenith, and the outer circular edge represents the horizon. h t r No Star brightness Moon phase Last quarter: 08th Zero or brighter New Moon: 16th 1st magnitude LACERTA nd Deneb First quarter: 23rd 2 CYGNUS Full Moon: 30th rd N 3 E LYRA th Vega W 4 LYRA N CORONA BOREALIS HERCULES BOOTES VULPECULA SAGITTA PEGASUS DELPHINUS Arcturus Altair EQUULEUS SERPENS AQUILA OPHIUCHUS SCUTUM PISCES Moon on 23rd SERPENS Zubeneschamali AQUARIUS CAPRICORNUS E SAGITTARIUS LIBRA a Saturn Centre of the Galaxy Antares Zubenelgenubi t s Antares VIRGO s t SAGITTARIUS P SCORPIUS P e PISCESMICROSCOPIUM AUSTRINUS SCORPIUS Mars Spica W PISCIS AUSTRINUS CORONA AUSTRALIS Fomalhaut Centre of the Galaxy TELESCOPIUM LUPUS ARA GRUSGRUS INDUS NORMA CORVUS INDUS CETUS SCULPTOR PAVO CIRCINUS CENTAURUS TRIANGULUM -
The Pleiades: the Celestial Herd of Ancient Timekeepers
The Pleiades: the celestial herd of ancient timekeepers. Amelia Sparavigna Dipartimento di Fisica, Politecnico di Torino C.so Duca degli Abruzzi 24, Torino, Italy Abstract In the ancient Egypt seven goddesses, represented by seven cows, composed the celestial herd that provides the nourishment to her worshippers. This herd is observed in the sky as a group of stars, the Pleiades, close to Aldebaran, the main star in the Taurus constellation. For many ancient populations, Pleiades were relevant stars and their rising was marked as a special time of the year. In this paper, we will discuss the presence of these stars in ancient cultures. Moreover, we will report some results of archeoastronomy on the role for timekeeping of these stars, results which show that for hunter-gatherers at Palaeolithic times, they were linked to the seasonal cycles of aurochs. 1. Introduction Archeoastronomy studies astronomical practices and related mythologies of the ancient cultures, to understand how past peoples observed and used the celestial phenomena and what was the role played by the sky in their cultures. This discipline is then a branch of the cultural astronomy, an interdisciplinary field that relates astronomical phenomena to current and ancient cultures. It must then be distinguished from the history of astronomy, because astronomy is a culturally specific concept and ancient peoples may have been related to the sky in different way [1,2]. Archeoastronomy is considered as a quite new interdisciplinary science, rooted in the Stonehenge studies of 1960s by the astronomer Gerald Hawkins, who tested Stonehenge alignments by computer, and concluded that these stones marked key dates in the megalithic calendar [3]. -
Download Current Issue
Global Security and Intelligence Studies Volume 5, Number 2 • Fall / Winter 2020 © 2020 Policy Studies Organization Editorial Welcome ......................................................................................... vii Melissa Layne and Carter Matherly Policy Relevant Commentary Prediction, Plus Patchwork, Equals Pandemic ................................................. 1 Margaret Marangione Research Articles Just Short of Cyberwar: A Focus on Jus Ad Vim to Inform an Ethical Framework for Cyberspace ............................................................ 19 Al Lewis The New River Report: Socio-Ecological System Impacts of Anthropogenic Pollution on New River Communities in Belize ................... 41 Kristin Drexler International NGOs Targeted by Terror: The Impact of Religiosity on Independence, Neutrality, and Impartiality .............................................. 73 Kathryn Lambert How Norm-Based Issue Frames Shape Public Support for Refugee Protection Policy: An Analysis Based on Survey Experiments in France and Germany ....................................................................................... 99 Melissa Schnyder Operationalizing Intelligence Collection in a Complex World: Bridging the Domestic & Foreign Intelligence Divide ................................. 123 Jim Burch (cont’d.) Notes from the Field Wrangling Stochasticity & Deconstructing Dimensionality: An Illustration of Fractals in Discursive Spaces ........................................... 155 Douglas Rose Book Reviews Mindf*ck, Cambridge -
Stellar Streams Discovered in the Dark Energy Survey
Draft version January 9, 2018 Typeset using LATEX twocolumn style in AASTeX61 STELLAR STREAMS DISCOVERED IN THE DARK ENERGY SURVEY N. Shipp,1, 2 A. Drlica-Wagner,3 E. Balbinot,4 P. Ferguson,5 D. Erkal,4, 6 T. S. Li,3 K. Bechtol,7 V. Belokurov,6 B. Buncher,3 D. Carollo,8, 9 M. Carrasco Kind,10, 11 K. Kuehn,12 J. L. Marshall,5 A. B. Pace,5 E. S. Rykoff,13, 14 I. Sevilla-Noarbe,15 E. Sheldon,16 L. Strigari,5 A. K. Vivas,17 B. Yanny,3 A. Zenteno,17 T. M. C. Abbott,17 F. B. Abdalla,18, 19 S. Allam,3 S. Avila,20, 21 E. Bertin,22, 23 D. Brooks,18 D. L. Burke,13, 14 J. Carretero,24 F. J. Castander,25, 26 R. Cawthon,1 M. Crocce,25, 26 C. E. Cunha,13 C. B. D'Andrea,27 L. N. da Costa,28, 29 C. Davis,13 J. De Vicente,15 S. Desai,30 H. T. Diehl,3 P. Doel,18 A. E. Evrard,31, 32 B. Flaugher,3 P. Fosalba,25, 26 J. Frieman,3, 1 J. Garc´ıa-Bellido,21 E. Gaztanaga,25, 26 D. W. Gerdes,31, 32 D. Gruen,13, 14 R. A. Gruendl,10, 11 J. Gschwend,28, 29 G. Gutierrez,3 B. Hoyle,33, 34 D. J. James,35 M. D. Johnson,11 E. Krause,36, 37 N. Kuropatkin,3 O. Lahav,18 H. Lin,3 M. A. G. Maia,28, 29 M. March,27 P. Martini,38, 39 F. Menanteau,10, 11 C. -
SFA Star Chart 1
Nov 20 SFA Star Chart 1 - Northern Region 0h Dec 6 Nov 5 h 23 30º 1 h d Dec 21 h p Oct 21h s b 2 h 22 ANDROMEDA - Daughter of Cepheus and Cassiopeia Mirach Local Meridian for 8 PM q m ANTLIA - Air Pumpe p 40º APUS - Bird of Paradise n o i b g AQUILA - Eagle k ANDROMEDA Jan 5 u TRIANGULUM AQUARIUS - Water Carrier Oct 6 h z 3 21 LACERTA l h ARA - Altar j g ARIES - Ram 50º AURIGA - Charioteer e a BOOTES - Herdsman j r Schedar b CAELUM - Graving Tool x b a Algol Jan 20 b o CAMELOPARDALIS - Giraffe h Caph q 4 Sep 20 CYGNUS k h 20 g a 60º z CAPRICORNUS - Sea Goat Deneb z g PERSEUS d t x CARINA - Keel of the Ship Argo k i n h m a s CASSIOPEIA - Ethiopian Queen on a Throne c h CASSIOPEIA g Mirfak d e i CENTAURUS - Half horse and half man CEPHEUS e CEPHEUS - Ethiopian King Alderamin a d 70º CETUS - Whale h l m Feb 5 5 CHAMAELEON - Chameleon h i g h 19 Sep 5 i CIRCINUS - Compasses b g z d k e CANIS MAJOR - Larger Dog b r z CAMELOPARDALIS 7 h CANIS MINOR - Smaller Dog e 80º g a e a Capella CANCER - Crab LYRA Vega d a k AURIGA COLUMBA - Dove t b COMA BERENICES - Berenice's Hair Aug 21 j Feb 20 CORONA AUSTRALIS - Southern Crown Eltanin c Polaris 18 a d 6 d h CORONA BOREALIS - Northern Crown h q g x b q 30º 30º 80º 80º 40º 70º 50º 60º 60º 70º 50º CRATER - Cup 40º i e CRUX - Cross n z b Rastaban h URSA CORVUS - Crow z r MINOR CANES VENATICI - Hunting Dogs p 80º b CYGNUS - Swan h g q DELPHINUS - Dolphin Kocab Aug 6 e 17 DORADO - Goldfish q h h h DRACO o 7 DRACO - Dragon s GEMINI t t Mar 7 EQUULEUS - Little Horse HERCULES LYNX z i a ERIDANUS - River j -
Beginnings of Indian Astronomy with Reference to a Parallel Development in China
History of Science in South Asia A journal for the history of all forms of scientific thought and action, ancient and modern, in all regions of South Asia Beginnings of Indian Astronomy with Reference to a Parallel Development in China Asko Parpola University of Helsinki MLA style citation form: Asko Parpola, “Beginnings of Indian Astronomy, with Reference to a Parallel De- velopment in China” History of Science in South Asia (): –. Online version available at: http://hssa.sayahna.org/. HISTORY OF SCIENCE IN SOUTH ASIA A journal for the history of all forms of scientific thought and action, ancient and modern, in all regions of South Asia, published online at http://hssa.sayahna.org Editorial Board: • Dominik Wujastyk, University of Vienna, Vienna, Austria • Kim Plofker, Union College, Schenectady, United States • Dhruv Raina, Jawaharlal Nehru University, New Delhi, India • Sreeramula Rajeswara Sarma, formerly Aligarh Muslim University, Düsseldorf, Germany • Fabrizio Speziale, Université Sorbonne Nouvelle – CNRS, Paris, France • Michio Yano, Kyoto Sangyo University, Kyoto, Japan Principal Contact: Dominik Wujastyk, Editor, University of Vienna Email: [email protected] Mailing Address: Krishna GS, Editorial Support, History of Science in South Asia Sayahna, , Jagathy, Trivandrum , Kerala, India This journal provides immediate open access to its content on the principle that making research freely available to the public supports a greater global exchange of knowledge. Copyrights of all the articles rest with the respective authors and published under the provisions of Creative Commons Attribution- ShareAlike . Unported License. The electronic versions were generated from sources marked up in LATEX in a computer running / operating system. was typeset using XƎTEX from TEXLive . -
THE SKY TONIGHT Constellation Is Said to Represent Ganymede, the Handsome Prince of Capricornus Troy
- October Oketopa HIGHLIGHTS Aquarius and Aquila In Greek mythology, the Aquarius THE SKY TONIGHT constellation is said to represent Ganymede, the handsome prince of Capricornus Troy. His good looks attracted the attention of Zeus, who sent the eagle The Greeks associated Capricornus Aquila to kidnap him and carry him with Aegipan, who was one of the to Olympus to serve as a cupbearer Panes - a group of half-goat men to the gods. Because of this story, who often had goat legs and horns. Ganymede was sometimes seen as the god of homosexual relations. He Aegipan assumed the form of a fish- also gives his name to one of the tailed goat and fled into the ocean moons of Jupiter, which are named to flee the great monster Typhon. after the lovers of Zeus. Later, he aided Zeus in defeating Typhon and was rewarded by being To locate Aquarius, first find Altair, placed in the stars. the brightest star in the Aquila constellation. Altair is one of the To find Capricornus (highlighted in closest stars to Earth that can be seen orange on the star chart), first locate with the naked eye, at a distance the Aquarius constellation, then of 17 light years. From Altair, scan look to the south-west along the east-south-east to find Aquarius ecliptic line (the dotted line on the (highlighted in yellow on the star chart). star chart). What’s On in October? October shows at Perpetual Guardian Planetarium, book at Museum Shop or online. See website for show times and - details: otagomuseum.nz October Oketopa SKY GUIDE Capturing the Cosmos Planetarium show. -
Useful Constellation Lists and More
USEFUL CONSTELLATION LISTS AND MORE The 12 Star Signs (Zodiac Signs) Aries, Gemini, Taurus, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius, Pieces. Constellations According to month, when they are seen at their best (9pm) meaning at their highest point January - Caelum, Dorado, Mensa, Orion, Reticulum, Taurus February - Auriga, Camelopardalis, Canis Major, Columba, Gemini, Lepus, Monoceros, Pictor March - Cancer, Canis Minor, Carina, Lynx, Puppis, Pyxis, Vela, Volans April - Antlia, Chamaeleon, Crater, Hydra, Leo, Leo Minor, Sextans, Ursa Major May - Canes Venatici, Centaurus, Coma Berenices, Corvus, Crux, Musca, Virgo June - Boötes, Circinus, Libra, Lupus, Ursa Minor July - Apus, Ara, Corona Borealis, Draco, Hercules, Norma, Ophiuchus, Scorpius, Serpens, Triangulum Australe August - Corona Austrina, Lyra, Sagittarius, Scutum, Telescopium September - Aquila, Capricornus, Cygnus, Delphinus, Equuleus, Indus, Microscopium, Pavo, Sagitta, Vulpecula October - Aquarius, Cepheus, Grus, Lacerta, Octans, Pegasus, Piscis Austrinus November - Andromeda, Cassiopeia, Phoenix, Pisces, Sculptor, Tucana December - Aries, Cetus, Eridanus, Fornax, Horologium, Hydrus, Perseus, Triangulum Months January – named in honour of the Roman god Janus the protector of doors February – named derived from the Roman verb ‘februum’ which means to cleanse. March – named in honour of Mars, the Roman God of war. April – named derived from the Latin word ‘aperiō’, to bud, to open (for buds) May – named after the Roman goddess Maia, Goddess of Spring