Guide D'observation Des Amas Globulaires
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
ESA/ESO Astronomy Exercise Series A
had a look into the control room, where the different purposes of the computers and monitors were illustrated. After dinner we went again up on the mountain and we saw the opening of the telescopes. The winners were real- ly excited seeing the “big brother” of the NTT moving. After sunset we stayed for a long time in the control room. We got explanations of the instruments mount- ed on each telescope as well as of the objects imaged that night. The Tele- scope Operators, the Staff Astronom- ers and the Visiting Astronomers kindly explained us their work. Of course, on both observatories we had the possibility to ask questions, which was very important for the win- ners, not just hearing astronomers talk- ing, but speaking directly to them. Although the long trip was very ex- VLT: The winners and Gerd Hudepohl in front of UT1. hausting, we forgot it completely seeing the observatories. All are thankful to The next destination was the Paranal got a visit to UT1, ANTU, by day. The ESO for providing this nice prize and Observatory. Humberto Varas was our active optics system and the mounted the opportunity to see the sites, where guide and showed us the site. First we instruments were explained. We also real frontline astronomy is done. In the Footsteps of Scientists – ESA/ESO Astronomy Exercise Series A. BACHER1 and L. LINDBERG CHRISTENSEN2 1ESO and Institut für Astrophysik, Leopold-Franzens-Universität Innsbruck; 2ST-ECF The first instalments of the “ESA/ ESO Astronomy Exercise Series” has been published, on the web and in print (see also ESO PR 29/01). -
Index Des Descriptions Des Objets De Messier Dans Le Guide Du Ciel
Index des descriptions des objets de Messier dans le Guide du Ciel objet Guide du Ciel date constellation type Messier 1 GC03-04 20040123 Taureau nébuleuse Messier 2 GC03-04 20030905 Verseau amas globulaire Messier 3 GC04-05 20040723 Chiens de Chasse amas globulaire Messier 4 GC06-07 20060623 Scorpion amas globulaire Messier 5 GC03-04 20030801 Serpent amas globulaire Messier 6 GC07-08 20070608 Scorpion amas ouverts Messier 7 GC07-08 20070608 Scorpion amas ouverts Messier 8 GC07-08 20070615 Sagittaire nébuleuse Messier 9 GC06-07 20070330 Ophiuchus amas globulaire Messier 10 GC05-06 20050610 Ophiuchus amas globulaire Messier 11 GC03-04 20030704 Écu amas du Canard sauvage Messier 12 GC05-06 20050701 Ophiuchus amas globulaire Messier 13 GC03-04 20030912 Hercule amas globulaire Messier 13 GC06-07 20060818 Hercule amas globulaire Messier 14 GC05-06 20050708 Ophiuchus amas globulaire Messier 15 GC03-04 20031205 Pégase amas globulaire Messier 16 GC07-08 20070713 Serpent nébuleuse Messier 17 GC06-07 20060602 Sagittaire nébuleuse Messier 18 GC07-08 20070706 Sagittaire amas ouvert Messier 19 GC05-06 20050805 Ophiuchus amas globulaire Messier 20 GC03-04 20030815 Sagittaire nébuleuse Trifide Messier 21 GC07-08 20070622 Sagittaire amas ouvert Messier 22 GC05-06 20050729 Sagittaire galaxie Messier 23 GC07-08 20070803 Sagittaire amas ouvert Messier 24 GC07-08 20070720 Sagittaire amas ouvert Messier 25 GC04-05 20040806 Sagittaire amas globulaire Messier 26 GC04-05 20041001 Aigle amas ouvert Messier 27 GC03-04 20030919 Flèche nébuleuse Dumbell Messier 28 -
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. -
VISTA Views a Vast Ball of Stars 9 May 2012
VISTA views a vast ball of stars 9 May 2012 sphere with a diameter of only about 25 times the distance between the Sun and the nearest star system, Alpha Centauri. About 160 globular clusters have been spotted encircling our galaxy, the Milky Way, mostly toward its bulging centre. The two latest discoveries, made using VISTA, were recently announced. The largest galaxies can have thousands of these rich collections of stars in orbit around them. Observations of globular clusters' stars reveal that they originated around the same time - more than 10 billion years ago - and from the same cloud of gas. As this formative period was just a few billion years after the Big Bang, nearly all of the gas on hand was the simplest, lightest and most common in the cosmos: hydrogen, along with some helium and much smaller amounts of heavier chemical elements such as oxygen and nitrogen. This striking view of the globular star cluster Messier 55 Being made mostly from hydrogen distinguishes in the constellation of Sagittarius (The Archer) was globular cluster residents from stars born in later obtained in infrared light with the VISTA survey eras, like our Sun, that are infused with heavier telescope at ESO's Paranal Observatory in Chile. This elements created in earlier generations of stars. vast ball of ancient stars is located at a distance of about The Sun lit up some 4.6 billion years ago, making it 17,000 light-years from Earth. Credit: ESO/J. only about half as old as the elderly stars in most Emerson/VISTA. -
A Near-Infrared Photometric Survey of Metal-Poor Inner Spheroid Globular Clusters and Nearby Bulge Fields
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by CERN Document Server A Near-Infrared Photometric Survey of Metal-Poor Inner Spheroid Globular Clusters and Nearby Bulge Fields T. J. Davidge 1 Canadian Gemini Office, Herzberg Institute of Astrophysics, National Research Council of Canada, 5071 W. Saanich Road, Victoria, B. C. Canada V8X 4M6 email:[email protected] ABSTRACT Images recorded through J; H; K; 2:2µm continuum, and CO filters have been obtained of a sample of metal-poor ([Fe/H] 1:3) globular clusters ≤− in the inner spheroid of the Galaxy. The shape and color of the upper giant branch on the (K; J K) color-magnitude diagram (CMD), combined with − the K brightness of the giant branch tip, are used to estimate the metallicity, reddening, and distance of each cluster. CO indices are used to identify bulge stars, which will bias metallicity and distance estimates if not culled from the data. The distances and reddenings derived from these data are consistent with published values, although there are exceptions. The reddening-corrected distance modulus of the Galactic Center, based on the Carney et al. (1992, ApJ, 386, 663) HB brightness calibration, is estimated to be 14:9 0:1. The mean ± upper giant branch CO index shows cluster-to-cluster scatter that (1) is larger than expected from the uncertainties in the photometric calibration, and (2) is consistent with a dispersion in CNO abundances comparable to that measured among halo stars. The luminosity functions (LFs) of upper giant branch stars in the program clusters tend to be steeper than those in the halo clusters NGC 288, NGC 362, and NGC 7089. -
Astronomía Con Ordenador II, Crédito Variable De Ciencias Naturales De 1º De Bachillerato, Durante El Curso 2007/2008
Astronomía II [email protected] 1 ASTRONOMÍA con ORDENADOR II Fermí Vilà Astronomía II [email protected] 2 Índice Introducción................................................................................................................................3 1ª Parte: VIDA Y MUERTE DE LAS ESTRELLAS Nacimiento de una estrella: Etapa Nebulosa...............................................................................5 Nacimiento de una estrella: Etapa de Protoestrella...................................................................13 La Secuencia Principal..............................................................................................................19 Enanas Marrones: Estrellas Fallidas.........................................................................................27 Gigantes Rojas y Supergigantes................................................................................................29 La Muerte de la Tierra y los planetas interiores........................................................................31 ¿Un nuevo comienzo en Plutón?...............................................................................................35 Muerte de una Gigante Roja. Nebulosa Planetaria...................................................................36 Enanas Blancas.........................................................................................................................39 Enanas Negras...........................................................................................................................41 -
Spatial Distribution of Galactic Globular Clusters: Distance Uncertainties and Dynamical Effects
Juliana Crestani Ribeiro de Souza Spatial Distribution of Galactic Globular Clusters: Distance Uncertainties and Dynamical Effects Porto Alegre 2017 Juliana Crestani Ribeiro de Souza Spatial Distribution of Galactic Globular Clusters: Distance Uncertainties and Dynamical Effects Dissertação elaborada sob orientação do Prof. Dr. Eduardo Luis Damiani Bica, co- orientação do Prof. Dr. Charles José Bon- ato e apresentada ao Instituto de Física da Universidade Federal do Rio Grande do Sul em preenchimento do requisito par- cial para obtenção do título de Mestre em Física. Porto Alegre 2017 Acknowledgements To my parents, who supported me and made this possible, in a time and place where being in a university was just a distant dream. To my dearest friends Elisabeth, Robert, Augusto, and Natália - who so many times helped me go from "I give up" to "I’ll try once more". To my cats Kira, Fen, and Demi - who lazily join me in bed at the end of the day, and make everything worthwhile. "But, first of all, it will be necessary to explain what is our idea of a cluster of stars, and by what means we have obtained it. For an instance, I shall take the phenomenon which presents itself in many clusters: It is that of a number of lucid spots, of equal lustre, scattered over a circular space, in such a manner as to appear gradually more compressed towards the middle; and which compression, in the clusters to which I allude, is generally carried so far, as, by imperceptible degrees, to end in a luminous center, of a resolvable blaze of light." William Herschel, 1789 Abstract We provide a sample of 170 Galactic Globular Clusters (GCs) and analyse its spatial distribution properties. -
Guide Du Ciel Profond
Guide du ciel profond Olivier PETIT 8 mai 2004 2 Introduction hjjdfhgf ghjfghfd fg hdfjgdf gfdhfdk dfkgfd fghfkg fdkg fhdkg fkg kfghfhk Table des mati`eres I Objets par constellation 21 1 Androm`ede (And) Andromeda 23 1.1 Messier 31 (La grande Galaxie d'Androm`ede) . 25 1.2 Messier 32 . 27 1.3 Messier 110 . 29 1.4 NGC 404 . 31 1.5 NGC 752 . 33 1.6 NGC 891 . 35 1.7 NGC 7640 . 37 1.8 NGC 7662 (La boule de neige bleue) . 39 2 La Machine pneumatique (Ant) Antlia 41 2.1 NGC 2997 . 43 3 le Verseau (Aqr) Aquarius 45 3.1 Messier 2 . 47 3.2 Messier 72 . 49 3.3 Messier 73 . 51 3.4 NGC 7009 (La n¶ebuleuse Saturne) . 53 3.5 NGC 7293 (La n¶ebuleuse de l'h¶elice) . 56 3.6 NGC 7492 . 58 3.7 NGC 7606 . 60 3.8 Cederblad 211 (N¶ebuleuse de R Aquarii) . 62 4 l'Aigle (Aql) Aquila 63 4.1 NGC 6709 . 65 4.2 NGC 6741 . 67 4.3 NGC 6751 (La n¶ebuleuse de l’œil flou) . 69 4.4 NGC 6760 . 71 4.5 NGC 6781 (Le nid de l'Aigle ) . 73 TABLE DES MATIERES` 5 4.6 NGC 6790 . 75 4.7 NGC 6804 . 77 4.8 Barnard 142-143 (La tani`ere noire) . 79 5 le B¶elier (Ari) Aries 81 5.1 NGC 772 . 83 6 le Cocher (Aur) Auriga 85 6.1 Messier 36 . 87 6.2 Messier 37 . 89 6.3 Messier 38 . -
A Basic Requirement for Studying the Heavens Is Determining Where In
Abasic requirement for studying the heavens is determining where in the sky things are. To specify sky positions, astronomers have developed several coordinate systems. Each uses a coordinate grid projected on to the celestial sphere, in analogy to the geographic coordinate 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 is probably the most widely used celestial coordinate system. It is also the one most closely related to the geographic coordinate system, because they use the same fun damental plane and the same poles. The projection of the Earth's equator onto the celestial sphere is called the celestial equator. Similarly, projecting the geographic poles on to the celest ial sphere defines the north and south celestial poles. However, there is an important difference between the equatorial and geographic coordinate systems: the geographic system is fixed to the Earth; it 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 of course 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. The longitud inal angle is called the right ascension (RA for short). -
Globular Clusters in the Inner Galaxy Classified from Dynamical Orbital
MNRAS 000,1{17 (2019) Preprint 14 November 2019 Compiled using MNRAS LATEX style file v3.0 Globular clusters in the inner Galaxy classified from dynamical orbital criteria Angeles P´erez-Villegas,1? Beatriz Barbuy,1 Leandro Kerber,2 Sergio Ortolani3 Stefano O. Souza 1 and Eduardo Bica,4 1Universidade de S~aoPaulo, IAG, Rua do Mat~ao 1226, Cidade Universit´aria, S~ao Paulo 05508-900, Brazil 2Universidade Estadual de Santa Cruz, Rodovia Jorge Amado km 16, Ilh´eus 45662-000, Brazil 3Dipartimento di Fisica e Astronomia `Galileo Galilei', Universit`adi Padova, Vicolo dell'Osservatorio 3, Padova, I-35122, Italy 4Universidade Federal do Rio Grande do Sul, Departamento de Astronomia, CP 15051, Porto Alegre 91501-970, Brazil Accepted XXX. Received YYY; in original form ZZZ ABSTRACT Globular clusters (GCs) are the most ancient stellar systems in the Milky Way. There- fore, they play a key role in the understanding of the early chemical and dynamical evolution of our Galaxy. Around 40% of them are placed within ∼ 4 kpc from the Galactic center. In that region, all Galactic components overlap, making their disen- tanglement a challenging task. With Gaia DR2, we have accurate absolute proper mo- tions for the entire sample of known GCs that have been associated with the bulge/bar region. Combining them with distances, from RR Lyrae when available, as well as ra- dial velocities from spectroscopy, we can perform an orbital analysis of the sample, employing a steady Galactic potential with a bar. We applied a clustering algorithm to the orbital parameters apogalactic distance and the maximum vertical excursion from the plane, in order to identify the clusters that have high probability to belong to the bulge/bar, thick disk, inner halo, or outer halo component. -
RASC Toronto Centre – the Sky This Month – Spring Galaxy Edition II April 29 to May 27, 2020 (Times in EDT, UT-4) by Chris Vaughan
RASC Toronto Centre – www.rascto.ca The Sky This Month – Spring Galaxy Edition II April 29 to May 27, 2020 (times in EDT, UT-4) by Chris Vaughan NEWS Space Exploration – Public and Private Ref. http://spaceflightnow.com/launch-schedule/ Launches Most launches by multiple countries are TBD May 27 tbd - SpaceX Falcon 9 rocket from Cape Canaveral Air Force Station, Florida, SpaceX Crew Dragon Capsule test flight to/from ISS with “Bob and Doug” (Douglas Hurley and Robert Behnken). NASA says no in-person public viewing May 5 tbd - Long March 5b rocket from Wenchang, China, new Chinese Crew Capsule test flight and high- speed re-entry without crew of 20 metric ton version designed for deep space (beyond LEO). Capsule can launch 6 persons or 3 persons with 500 kg of cargo This Month in History (a sampling) Ref. http://www2.jpl.nasa.gov/calendar/, http://www.planetary.org/multimedia/space-images/charts/whats- up-in-the-solar-system-frohn.html, http://www.lunar-occultations.com/rlo/calendar.pdf Astro-Birthdays and Milestones May 1, 1825 – Swiss mathematician Johann Jakob Balmer, formulated formula for spectral emission lines of Hydrogen. May 10, 1900 – Pioneering female British-American astronomer Cecilia Payne-Gaposchkin, earned the first PhD from Harvard’s Radcliffe College, on stellar composition. She surveyed all stars brighter than 10th mag. and millions of variable stars, setting the foundations of stellar evolution studies. Also supervised Helen Sawyer-Hogg and others. May 15, 1857 - Scottish astronomer, Williamina Fleming. In nine years, she catalogued more than 10,000 stars. During her work, she discovered 59 gaseous nebulae (including the Horsehead Nebula), over 310 variable stars, and 10 novae. -
TAAS Observing Challenge, March 2016 Deep Sky Object
TAAS Observing Challenge, March 2016 Deep Sky Object NGC 3242 (PN) Hydra ra: 10h 24m 46.2s dec: -18° 38’ 34” Magnitude (visual) = 7.7 Size = 64” Distance = approximately 2,500 light years Description: William Herschel discovered this planetary nebula on February 7, 1785, and cataloged it as H IV.27. John Herschel observed it from the Cape of Good Hope, South Africa, in the 1830s, and numbered it as h 3248, and included it in the 1864 General Catalogue as GC 2102; this became NGC 3242 in J.L.E. Dreyer's New General Catalogue of 1888. This planetary nebula consists of a small dense nebula of about 16" x 26" in diameter, surrounded by a fainter envelop measuring about 40 x 35 arc seconds. This central nebula is embedded in a much larger faint halo, measuring 1250" or about 20.8 arc minutes in diameter. The bright inner nebula is described as looking like an eye by Burnham, and the outer shell gave rise to its popular name, as it is of about the apparent size of Jupiter. This planetary nebula is most frequently called the Ghost of Jupiter, or Jupiter's Ghost, but it is also sometimes referred to as the Eye Nebula, or the CBS Eye. Source: http://messier.seds.org/spider/Misc/n3242.html AL: Herschel 400, Caldwell [59]; TAAS 200 Challenge Object NGC 3962 (GX) Crater ra: 11h 54m 40.0s dec: -13° 58’ 34” Magnitude (visual) = 10.7 Size = 2.6’ x 2.2’ Position angle = 10° Description: NGC3962 is a small, elliptical galaxy in the constellation of Crater.