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Ann Merchant Boesgaard Publications Merchant, A. E., Bodenheimer, P., and Wallerstein, G
Ann Merchant Boesgaard Publications Merchant, A. E., Bodenheimer, P., and Wallerstein, G. (1965). “The Lithium Isotope Ratio in Two Hyades F Stars.” Ap. J., 142, 790. Merchant, A. E. (1966). “Beryllium in F- and G-Type Dwarfs.” Ap. J., 143, 336. Hodge, P. W., and Merchant, A. E. (1966). “Photometry of SO Galaxies II. The Peculiar Galaxy NGC 128.” Ap. J., 144, 875. Merchant, A. E. (1967). “The Abundance of Lithium in Early M-Type Stars.” Ap. J., 147, 587. Merchant, A. E. (1967). “Measured Equivalent Widths in Early M-Type Stars.” Lick Obs. Bull. No. 595 (Univ. of California Press). Boesgaard, A. M. (1968). “Isotopes of Magnesium in Stellar Atmosphere.” Ap. J., 154, 185. Boesgaard, A. M. (1968). “Observations of Beryllium in Stars.” Highlights of Astron- omy, ed. L. Perek (Dordrecht: D. Reidel), p. 237. Boesgaard, A. M. (1969). “Intensity Variation in Ca Emission in an MS Star.” Pub. A. S. P., 81, 283. Boesgaard, A. M. (1969). “Observational Clues to the Evolution of M Giant Stars.” Pub. A. S. P., 81, 365. Boesgaard, A. M. (1970). “The Lithium Isotope Ratio in δ Sagittae.” Ap. J., 159, 727. Boesgaard, A. M. (1970). “The Ratio of Titanium to Zirconium in Late-Type Stars.” Ap. J., 161, 163. Boesgaard, A. M. (1970). “On the Lithium Content in Late-Type Giants.” Ap. Letters, 5, 145. Boesgaard, A. M. (1970). “Lithium in Heavy-Metal Red Giants.” Ap. J., 161, 1003. Boesgaard, A. M. (1971). “The Lithium Content of Capella.” Ap. J., 167, 511. Boesgaard, A. M. (1973). “Iron Emission Lines in a Orionis.” In Stellar Chromospheres, eds. -
C a L E N D a R F O R 2019
Small Astronomy Calendar for Amateur Astronomers Year III 2021 Let’s welcome our 2021 Small Astronomy Calendar Edition made by our Intergalactic Astronomy Educators Fellowship (IGAEF)’s team. In 2021, many amateur astronomers asked for calculations for more specific geographical locations. This year we added new useful calculated positions and coordinates for everyone in the world to use. You should check this calendar every month, specifically the lunar occultations pages for your observation point. There are many interesting and unique events that might not happen every year, because of the different parameters of the Moon orbit. Our hope is to fulfill your expectations. We would like to receive suggestions and feedback. You can find the editor’s email in the last page of the calendar. We appreciate your support and we are looking forward to having a good observational year, and a better and more complete calendar for this first year of a new decade. Index 3 - Calendar for 2021 4 – What is the Intergalactic Astronomy Educators Fellowship (IGAEF) 5 - Time Zones and Universal Time 6 - Phases of the Moon 2021 7 – Physical Ephemeris for the Moon 2021 10 - Local Time (EST) of MOONRISE 2021 11 - Local Time (EST) of MOONSET 2021 12 - Local time (EST) of planets rise and set 2021 15 - Diary of Astronomical Phenomena 2021 21 - Lunar eclipses 23 - Solar Eclipses 25 - Meteor Showers for 2021 26 – 2021 UPCOMING COMETS 27 - Satellites of Jupiter 2021 36 – Mutual Events of Jupiter Satellites 2021 39 - Julian Day Number, Apparent Sidereal Time, Obliquity -
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. -
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. -
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). -
Astronomy 2008 Index
Astronomy Magazine Article Title Index 10 rising stars of astronomy, 8:60–8:63 1.5 million galaxies revealed, 3:41–3:43 185 million years before the dinosaurs’ demise, did an asteroid nearly end life on Earth?, 4:34–4:39 A Aligned aurorae, 8:27 All about the Veil Nebula, 6:56–6:61 Amateur astronomy’s greatest generation, 8:68–8:71 Amateurs see fireballs from U.S. satellite kill, 7:24 Another Earth, 6:13 Another super-Earth discovered, 9:21 Antares gang, The, 7:18 Antimatter traced, 5:23 Are big-planet systems uncommon?, 10:23 Are super-sized Earths the new frontier?, 11:26–11:31 Are these space rocks from Mercury?, 11:32–11:37 Are we done yet?, 4:14 Are we looking for life in the right places?, 7:28–7:33 Ask the aliens, 3:12 Asteroid sleuths find the dino killer, 1:20 Astro-humiliation, 10:14 Astroimaging over ancient Greece, 12:64–12:69 Astronaut rescue rocket revs up, 11:22 Astronomers spy a giant particle accelerator in the sky, 5:21 Astronomers unearth a star’s death secrets, 10:18 Astronomers witness alien star flip-out, 6:27 Astronomy magazine’s first 35 years, 8:supplement Astronomy’s guide to Go-to telescopes, 10:supplement Auroral storm trigger confirmed, 11:18 B Backstage at Astronomy, 8:76–8:82 Basking in the Sun, 5:16 Biggest planet’s 5 deepest mysteries, The, 1:38–1:43 Binary pulsar test affirms relativity, 10:21 Binocular Telescope snaps first image, 6:21 Black hole sets a record, 2:20 Black holes wind up galaxy arms, 9:19 Brightest starburst galaxy discovered, 12:23 C Calling all space probes, 10:64–10:65 Calling on Cassiopeia, 11:76 Canada to launch new asteroid hunter, 11:19 Canada’s handy robot, 1:24 Cannibal next door, The, 3:38 Capture images of our local star, 4:66–4:67 Cassini confirms Titan lakes, 12:27 Cassini scopes Saturn’s two-toned moon, 1:25 Cassini “tastes” Enceladus’ plumes, 7:26 Cepheus’ fall delights, 10:85 Choose the dome that’s right for you, 5:70–5:71 Clearing the air about seeing vs. -
Issue 36, June 2008
June2008 June2008 In This Issue: 7 Supernova Birth Seen in Real Time Alicia Soderberg & Edo Berger 23 Arp299 With LGS AO Damien Gratadour & Jean-René Roy 46 Aspen Instrument Update Joseph Jensen On the Cover: NGC 2770, home to Supernova 2008D (see story starting on page 7 Engaging Our Host of this issue, and image 52 above showing location Communities of supernova). Image Stephen J. O’Meara, Janice Harvey, was obtained with the Gemini Multi-Object & Maria Antonieta García Spectrograph (GMOS) on Gemini North. 2 Gemini Observatory www.gemini.edu GeminiFocus Director’s Message 4 Doug Simons 11 Intermediate-Mass Black Hole in Gemini South at moonset, April 2008 Omega Centauri Eva Noyola Collisions of 15 Planetary Embryos Earthquake Readiness Joseph Rhee 49 Workshop Michael Sheehan 19 Taking the Measure of a Black Hole 58 Polly Roth Andrea Prestwich Staff Profile Peter Michaud 28 To Coldly Go Where No Brown Dwarf 62 Rodrigo Carrasco Has Gone Before Staff Profile Étienne Artigau & Philippe Delorme David Tytell Recent 31 66 Photo Journal Science Highlights North & South Jean-René Roy & R. Scott Fisher Photographs by Gemini Staff: • Étienne Artigau NICI Update • Kirk Pu‘uohau-Pummill 37 Tom Hayward GNIRS Update 39 Joseph Jensen & Scot Kleinman FLAMINGOS-2 Update Managing Editor, Peter Michaud 42 Stephen Eikenberry Science Editor, R. Scott Fisher MCAO System Status Associate Editor, Carolyn Collins Petersen 44 Maxime Boccas & François Rigaut Designer, Kirk Pu‘uohau-Pummill 3 Gemini Observatory www.gemini.edu June2008 by Doug Simons Director, Gemini Observatory Director’s Message Figure 1. any organizations (Gemini Observatory 100 The year-end task included) have extremely dedicated and hard- completion statistics 90 working staff members striving to achieve a across the entire M 80 0-49% Done observatory are worthwhile goal. -
Übersicht NGC-Objektauswahl Cepheus Zur Übersichtskarte
NGC-Objektauswahl Cepheus NGC 40 NGC 7055 NGC 7354 NGC 188 NGC 7076 NGC 7380 NGC 1184 NGC 7129 NGC 7419 NGC 1544 NGC 7139 NGC 7423 NGC 2276 NGC 7142 NGC 7429 NGC 2300 NGC 7160 NGC 7510 NGC 6939 NGC 7226 NGC 7538 NGC 6949 NGC 7235 NGC 7708 NGC 6951 NGC 7261 NGC 7762 NGC 7023 NGC 7281 NGC 7822 Sternbild- Übersicht Zur Objektauswahl: Nummer anklicken Zur Übersichtskarte: Objekt anklicken Sternbildübersicht Auswahl NGC 40_7708 Aufsuchkarte Auswahl NGC 188_Aufsuchkarte 2 UMi 2 Auswahl NGC 1184 Aufsuchkarte Auswahl NGC 1544_2276_2300 Aufsuchkarte Auswahl NGC 6939 Aufsuchkarte Auswahl NGC 6949_6951 Aufsuchkarte Auswahl NGC 7023 Aufsuchkarte Auswahl NGC 7055 Aufsuchkarte Auswahl NGC 7076 Aufsuchkarte Auswahl NGC 7129_7142 Aufsuchkarte Auswahl NGC 7139_7160 Aufsuchkarte Auswahl NGC 7226_7235 Aufsuchkarte Auswahl N 7261_7281 Aufsuchkarte Auswahl NGC 7354_7419_7429_7510_7538 Aufsuchkarte Auswahl NGC 7380_7423 Aufsuchkarte Auswahl NGC 7762_7822 Aufsuchkarte Auswahl NGC 40 Übersichtskarte Aufsuch- Auswahl karte NGC 188 Übersichtskarte Aufsuch- Auswahl karte NGC 1184 Übersichtskarte Aufsuch- Auswahl karte NGC 1544 Übersichtskarte Aufsuch- Auswahl karte N 2276_N 2300 Übersichtskarte Aufsuch- Auswahl karte NGC 6939 Übersichtskarte Aufsuch- Auswahl karte NGC 6949 Übersichtskarte Aufsuch- Auswahl karte NGC 6951 Übersichtskarte Aufsuch- Auswahl karte NGC 7023 Übersichtskarte Aufsuch- Auswahl karte NGC 7055 Übersichtskarte Aufsuch- Auswahl karte NGC 7076 Übersichtskarte Aufsuch- Auswahl karte NGC 7129_7142 Übersichtskarte Aufsuch- Auswahl karte NGC 7139 -
Ioptron CEM40 Center-Balanced Equatorial Mount
iOptron®CEM40 Center-Balanced Equatorial Mount Instruction Manual Product CEM40 (#7400A series) and CEM40EC (#7400ECA series, as shown) Please read the included CEM40 Quick Setup Guide (QSG) BEFORE taking the mount out of the case! This product is a precision instrument. Please read the included QSG before assembling the mount. Please read the entire Instruction Manual before operating the mount. You must hold the mount firmly when disengaging the gear switches. Otherwise personal injury and/or equipment damage may occur. Any worm system damage due to improper operation will not be covered by iOptron’s limited warranty. If you have any questions please contact us at [email protected] WARNING! NEVER USE A TELESCOPE TO LOOK AT THE SUN WITHOUT A PROPER FILTER! Looking at or near the Sun will cause instant and irreversible damage to your eye. Children should always have adult supervision while using a telescope. 2 Table of Contents Table of Contents ........................................................................................................................................ 3 1. CEM40 Introduction ............................................................................................................................... 5 2. CEM40 Overview ................................................................................................................................... 6 2.1. Parts List ......................................................................................................................................... -
Meeting Program
A A S MEETING PROGRAM 211TH MEETING OF THE AMERICAN ASTRONOMICAL SOCIETY WITH THE HIGH ENERGY ASTROPHYSICS DIVISION (HEAD) AND THE HISTORICAL ASTRONOMY DIVISION (HAD) 7-11 JANUARY 2008 AUSTIN, TX All scientific session will be held at the: Austin Convention Center COUNCIL .......................... 2 500 East Cesar Chavez St. Austin, TX 78701 EXHIBITS ........................... 4 FURTHER IN GRATITUDE INFORMATION ............... 6 AAS Paper Sorters SCHEDULE ....................... 7 Rachel Akeson, David Bartlett, Elizabeth Barton, SUNDAY ........................17 Joan Centrella, Jun Cui, Susana Deustua, Tapasi Ghosh, Jennifer Grier, Joe Hahn, Hugh Harris, MONDAY .......................21 Chryssa Kouveliotou, John Martin, Kevin Marvel, Kristen Menou, Brian Patten, Robert Quimby, Chris Springob, Joe Tenn, Dirk Terrell, Dave TUESDAY .......................25 Thompson, Liese van Zee, and Amy Winebarger WEDNESDAY ................77 We would like to thank the THURSDAY ................. 143 following sponsors: FRIDAY ......................... 203 Elsevier Northrop Grumman SATURDAY .................. 241 Lockheed Martin The TABASGO Foundation AUTHOR INDEX ........ 242 AAS COUNCIL J. Craig Wheeler Univ. of Texas President (6/2006-6/2008) John P. Huchra Harvard-Smithsonian, President-Elect CfA (6/2007-6/2008) Paul Vanden Bout NRAO Vice-President (6/2005-6/2008) Robert W. O’Connell Univ. of Virginia Vice-President (6/2006-6/2009) Lee W. Hartman Univ. of Michigan Vice-President (6/2007-6/2010) John Graham CIW Secretary (6/2004-6/2010) OFFICERS Hervey (Peter) STScI Treasurer Stockman (6/2005-6/2008) Timothy F. Slater Univ. of Arizona Education Officer (6/2006-6/2009) Mike A’Hearn Univ. of Maryland Pub. Board Chair (6/2005-6/2008) Kevin Marvel AAS Executive Officer (6/2006-Present) Gary J. Ferland Univ. of Kentucky (6/2007-6/2008) Suzanne Hawley Univ. -
September 2016 BRAS Newsletter
September 2016 Issue th Next Meeting: Monday, Sept. 12 at 7PM at HRPO (2nd Mondays, Highland Road Park Observatory) What's In This Issue? Due to the 1000 Year Flood in Louisiana beginning August 14, some of our club’s activities were curtailed, thus our newsletter is shorter than usual. President’s Message Secretary's Summary for August (no meeting) Light Pollution Committee Report Outreach Report Photo Gallery 20/20 Vision Campaign Messages from the HRPO Triple Conjunction with Moon Observing Notes: Capricornus – The Sea Goat, by John Nagle & Mythology Newsletter of the Baton Rouge Astronomical Society September 2016 BRAS President’s Message This has been a month of many changes for all of us. Some have lost almost everything in the flood, Some have lost a little, and some have lost nothing... Our hearts go out to all who have lost, and thanks to all who have reached out to help others. Due to the flooding, last month’s meeting, at LIGO, was cancelled. The September meeting will be on the 12th at the Observatory, which did not receive any water during the flood, thus BRAS suffered no loss of property. As part of our Outreach effort. If anyone you know has any telescope and/or equipment that was in water during the flood, let us know and we will try to help clean, adjust, etc. the equipment. On September 2nd (I am a little late with this message), Dr. Alan Stern, the New Horizons Primary Investigator, gave two talks at LSU. The morning talk was for Astronomy graduate students, and was a little technical. -
The HARPS Search for Southern Extra-Solar Planets. XXXI. Magnetic
Astronomy & Astrophysics manuscript no. magnetic˙cycles c ESO 2011 July 28, 2011 The HARPS search for southern extra-solar planets⋆ XXXI. Magnetic activity cycles in solar-type stars: statistics and impact on precise radial velocities C. Lovis1, X. Dumusque1,2, N. C. Santos2,3,1, F. Bouchy4,5, M. Mayor1, F. Pepe1, D. Queloz1, D. S´egransan1, and S. Udry1 1 Observatoire de Gen`eve, Universit´ede Gen`eve, 51 ch. des Maillettes, CH-1290 Versoix, Switzerland e-mail: [email protected] 2 Centro de Astrof´ısica, Universidade do Porto, Rua das Estrelas, P4150-762 Porto, Portugal 3 Departamento de F´ısica e Astronomia, Faculdade de Ciˆencias, Universidade do Porto, Portugal 4 Institut d’Astrophysique de Paris, UMR7095 CNRS, Universit´ePierre & Marie Curie, 98bis Bd Arago, F-75014 Paris, France 5 Observatoire de Haute-Provence, CNRS/OAMP, F-04870 St. Michel l’Observatoire, France Received 26 July 2011 / Accepted ... ABSTRACT Context. Searching for extrasolar planets through radial velocity measurements relies on the stability of stellar photospheres. Several phenomena are known to affect line profiles in solar-type stars, among which stellar oscillations, granulation and magnetic activity through spots, plages and activity cycles. Aims. We aim at characterizing the statistical properties of magnetic activity cycles, and studying their impact on spectroscopic measurements such as radial velocities, line bisectors and line shapes. Methods. We use data from the HARPS high-precision planet-search sample comprising 304 FGK stars followed over about 7 ′ years. We obtain high-precision Ca II H&K chromospheric activity measurements and convert them to RHK indices using an updated ′ calibration taking into account stellar metallicity.