Observer's Guide to Carbon Stars
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
15Th October at 19:00 Hours Or 7Pm AEST
TheSky (c) Astronomy Software 1984-1998 TheSky (c) Astronomy Software 1984-1998 URSA MINOR CEPHEUS CASSIOPEIA DRACO Night sky map OctoberDRACO 2017 URSA MAJOR North North STAR BRIGHTNESS Zero or brighter 1st magnitude nd LACERTA Deneb 2 NE rd NE Vega CYGNUS CANES VENATICI LYRAANDROMEDA 3 Vega NW th NW 4 LYRA LEO MINOR CORONA BOREALIS HERCULES BOOTES CORONA BOREALIS HERCULES VULPECULA COMA BERENICES Arcturus PEGASUS SAGITTA DELPHINUS SAGITTA SERPENS LEO Altair EQUULEUS PISCES Regulus AQUILAVIRGO Altair OPHIUCHUS First Quarter Moon SERPENS on the 28th Spica AQUARIUS LIBRA Zubenelgenubi SCUTUM OPHIUCHUS CORVUS Teapot SEXTANS SERPENS CAPRICORNUS SERPENSCRATER AQUILA SCUTUM East East Antares SAGITTARIUS CETUS PISCIS AUSTRINUS P SATURN Centre of the Galaxy MICROSCOPIUM Centre of the Galaxy HYDRA West SCORPIUS West LUPUS SAGITTARIUS SCULPTOR CORONA AUSTRALIS Antares GRUS CENTAURUS LIBRA SCORPIUS NORMAINDUS TELESCOPIUM CORONA AUSTRALIS ANTLIA Zubenelgenubi ARA CIRCINUS Hadar Alpha Centauri PHOENIX Mimosa CRUX ARA CAPRICORNUS TRIANGULUM AUSTRALEPAVO PYXIS TELESCOPIUM NORMAVELALUPUS FORNAX TUCANA MUSCA 47 Tucanae MICROSCOPIUM Achernar APUS ERIDANUS PAVO SMC TRIANGULUM AUSTRALE CIRCINUS OCTANSCHAMAELEON APUS CARINA HOROLOGIUMINDUS HYDRUS Alpha Centauri OCTANS SouthSouth CelestialCelestial PolePole VOLANS Hadar PUPPIS RETICULUM POINTERS SOUTHERN CROSS PISCIS AUSTRINUS MENSA CHAMAELEONMENSA MUSCA CENTAURUS Adhara CANIS MAJOR CHART KEY LMC Mimosa SE GRUS DORADO SMC CAELUM LMCCRUX Canopus Bright star HYDRUS TUCANA SWSW MOON PHASE Faint star VOLANS DORADO -
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. -
Lurking in the Shadows: Wide-Separation Gas Giants As Tracers of Planet Formation
Lurking in the Shadows: Wide-Separation Gas Giants as Tracers of Planet Formation Thesis by Marta Levesque Bryan In Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy CALIFORNIA INSTITUTE OF TECHNOLOGY Pasadena, California 2018 Defended May 1, 2018 ii © 2018 Marta Levesque Bryan ORCID: [0000-0002-6076-5967] All rights reserved iii ACKNOWLEDGEMENTS First and foremost I would like to thank Heather Knutson, who I had the great privilege of working with as my thesis advisor. Her encouragement, guidance, and perspective helped me navigate many a challenging problem, and my conversations with her were a consistent source of positivity and learning throughout my time at Caltech. I leave graduate school a better scientist and person for having her as a role model. Heather fostered a wonderfully positive and supportive environment for her students, giving us the space to explore and grow - I could not have asked for a better advisor or research experience. I would also like to thank Konstantin Batygin for enthusiastic and illuminating discussions that always left me more excited to explore the result at hand. Thank you as well to Dimitri Mawet for providing both expertise and contagious optimism for some of my latest direct imaging endeavors. Thank you to the rest of my thesis committee, namely Geoff Blake, Evan Kirby, and Chuck Steidel for their support, helpful conversations, and insightful questions. I am grateful to have had the opportunity to collaborate with Brendan Bowler. His talk at Caltech my second year of graduate school introduced me to an unexpected population of massive wide-separation planetary-mass companions, and lead to a long-running collaboration from which several of my thesis projects were born. -
02 Southern Cross
Asterism Southern Cross The Southern Cross is located in the constellation Crux, the smallest of the 88 constellations. It is one of the most distinctive. With the four stars Mimosa BeCrux, Ga Crux, A Crux and Delta Crucis, forming the arms of the cross. The Southern Cross was also used as a remarkably accurate timepiece by all the people of the southern hemisphere, referred to as the ‘Southern Celestial Clock’ by the portuguese naturalist Cristoval D’Acosta. It is perpendicular as it passes the meridian, and the exact time can thus be calculated visually from its angle. The german explorer Baron Alexander von Humboldt, sailing across the southern oceans in 1799, wrote: “It is a timepiece, which advances very regularly nearly 4 minutes a day, and no other group of stars affords to the naked eye an observation of time so easily made”. Asterism - An asterism is a distinctive pattern of stars or a distinctive group of stars in the sky. Constellation - A grouping of stars that make an imaginary picture in the sky. There are 88 constellations. The stars and objects nearby The Main-Themes in asterism Southern Cross Southern Cross Ga Crux A Crux Mimosa, Be Crux Delta Crucis The Motives in asterism Southern Cross Crucis A Bayer / Flamsteed indication AM Arp+Madore - A Catalogue of Southern peculiar Galaxies and Associations [B10] Boss, 1910 - Preliminary General Catalogue of 6188 Stars C Cluster CCDM Catalogue des composantes d’étoiles doubles et multiples CD Cordoba Durchmusterung Declination Cel Celescope Catalog of ultraviolet Magnitudes CPC -
I Nomi Delle Stelle
I nomi delle stelle Se state leggendo questa pagina perché volete acquistare il nome di una stella, visitate IAU Theme Buying Stars and Star Names. Altrimenti, proseguite con il testo sottostante. L'UAI intende delineare una distinzione tra i termini nome e designazione. In questo testo, così come in altre pubblicazioni dell'UAI, il nome si riferisce al termine (solitamente colloquiale) utilizzato per una stella nel linguaggio quotidiano, mentre la designazione è esclusivamente alfanumerica e viene usata quasi esclusivamente nei cataloghi ufficiali e nell'astronomia professionale. Storia dei cataloghi stellari La catalogazione delle stelle ha una lunga storia alle spalle. Sin dalla preistoria, culture e civiltà in tutto il mondo hanno dato dei propri nomi alle stelle più luminose e importanti nel cielo notturno. Attraversando le culture greca, latina e araba, alcuni nomi hanno subito pochi cambiamenti e altri sono in uso ancora oggi. Mentre l'astronomia si sviluppava e si evolveva nel corso dei secoli, sorgeva la necessità di un sistema di catalogazione universale, in base al quale le stelle più luminose (e quindi quelle più studiate) fossero conosciute secondo gli stessi appellativi, indipendentemente dal Paese o dalla cultura da cui provenivano gli astronomi. Per risolvere questo problema, gli astronomi durante il Rinascimento hanno tentato di produrre cataloghi stellari seguendo un insieme di regole. Il primo esempio, ancora oggi popolare, è stato introdotto da Johann Bayer nel suo atlante Uranometria del 1603. Bayer ha catalogato le stelle in ogni costellazione con lettere greche minuscole, seguendo l'ordine approssimativo della loro luminosità apparente, in modo che la stella più luminosa di una costellazione fosse solitamente (ma non sempre) etichettata come Alpha, la seconda più brillante fosse Beta, e così via. -
New Constraints on the Membership of the T Dwarf S Ori 70 in the Σ Orionis Cluster
A&A 477, 895–900 (2008) Astronomy DOI: 10.1051/0004-6361:20078600 & c ESO 2008 Astrophysics New constraints on the membership of the T dwarf S Ori 70 in the σ Orionis cluster M. R. Zapatero Osorio1,V.J.S.Béjar1,G.Bihain1,2, E. L. Martín1,3,R.Rebolo1,2, I. Villó-Pérez4, A. Díaz-Sánchez5, A. Pérez Garrido5, J. A. Caballero6, T. Henning6, R. Mundt6, D. Barrado y Navascués7, and C. A. L. Bailer-Jones6 1 Instituto de Astrofísica de Canarias, 38200 La Laguna, Tenerife, Spain e-mail: [email protected] 2 Consejo Superior de Investigaciones Científicas, Spain 3 University of Central Florida, Department of Physics, PO Box 162385, Orlando, FL 32816, USA 4 Departamento de Electrónica, Universidad Politécnica de Cartagena, 30202 Cartagena, Spain 5 Departamento de Física Aplicada, Universidad Politécnica de Cartagena, 30202 Cartagena, Spain 6 Max-Planck Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany 7 LAEFF-INTA, PO 50727, 28080 Madrid, Spain Received 2 September 2007 / Accepted 10 October 2007 ABSTRACT Aims. The nature of S Ori 70 (S Ori J053810.1−023626), a faint mid-T type object found towards the direction of the young σ Orionis cluster, is still under debate. We intend to find out whether it is a field brown dwarf or a 3-Myr old planetary-mass member of the cluster. Methods. We report on near-infrared JHKs and mid-infrared [3.6] and [4.5] IRAC/Spitzer photometry recently obtained for S Ori 70. The new near-infrared images (taken 3.82 yr after the discovery data) allowed us to derive the first proper motion measurement for this object. -