Hungarian Academy of Sciences CENTRAL RESEARCH INSTITUTE for PHYSICS
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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. -
The NTT Provides the Deepest Look Into Space 6
The NTT Provides the Deepest Look Into Space 6. A. PETERSON, Mount Stromlo Observatory,Australian National University, Canberra S. D'ODORICO, M. TARENGHI and E. J. WAMPLER, ESO The ESO New Technology Telescope r on La Silla has again proven its extraor- - dinary abilities. It has now produced the "deepest" view into the distant regions of the Universe ever obtained with ground- or space-based telescopes. Figure 1 : This picture is a reproduction of a I.1 x 1.1 arcmin portion of a composite im- age of forty-one 10-minute exposures in the V band of a field at high galactic latitude in the constellation of Sextans (R.A. loh 45'7 Decl. -0' 143. The individual images were obtained with the EMMI imager/spectrograph at the Nas- myth focus of the ESO 3.5-m New Technolo- gy Telescope using a 1000 x 1000 pixel Thomson CCD. This combination gave a full field of 7.6 x 7.6 arcmin and a pixel size of 0.44 arcsec. The average seeing during these exposures was 1.0 arcsec. The telescope was offset between the indi- vidual exposures so that the sky background could be used to flat-field the frame. This procedure also removed the effects of cos- mic rays and blemishes in the CCD. More than 97% of the objects seen in this sub- field are galaxies. For the brighter galax- ies, there is good agreement between the galaxy counts of Tyson (1988, Astron. J., 96, 1) and the NTT counts for the brighter galax- ies. -
Variable Star Section Circular
British Astronomical Association Variable Star Section Circular No 82, December 1994 CONTENTS A New Director 1 Credit for Observations 1 Submission of 1994 Observations 1 Chart Problems 1 Recent Novae Named 1 Z Ursae Minoris - A New R CrB Star? 2 The February 1995 Eclipse of 0¼ Geminorum 2 Computerisation News - Dave McAdam 3 'Stella Haitland, or Love and the Stars' - Philip Hurst 4 The 1994 Outburst of UZ Bootis - Gary Poyner 5 Observations of Betelgeuse by the SPA-VSS - Tony Markham 6 The AAVSO and the Contribution of Amateurs to VS Research Suspected Variables - Colin Henshaw 8 From the Literature 9 Eclipsing Binary Predictions 11 Summaries of IBVS's Nos 4040 to 4092 14 The BAA Instruments and Imaging Section Newsletter 16 Light-curves (TZ Per, R CrB, SV Sge, SU Tau, AC Her) - Dave McAdam 17 ISSN 0267-9272 Office: Burlington House, Piccadilly, London, W1V 9AG Section Officers Director Tristram Brelstaff, 3 Malvern Court, Addington Road, READING, Berks, RG1 5PL Tel: 0734-268981 Section Melvyn D Taylor, 17 Cross Lane, WAKEFIELD, Secretary West Yorks, WF2 8DA Tel: 0924-374651 Chart John Toone, Hillside View, 17 Ashdale Road, Cressage, Secretary SHREWSBURY, SY5 6DT Tel: 0952-510794 Computer Dave McAdam, 33 Wrekin View, Madeley, TELFORD, Secretary Shropshire, TF7 5HZ Tel: 0952-432048 E-mail: COMPUSERV 73671,3205 Nova/Supernova Guy M Hurst, 16 Westminster Close, Kempshott Rise, Secretary BASINGSTOKE, Hants, RG22 4PP Tel & Fax: 0256-471074 E-mail: [email protected] [email protected] Pro-Am Liaison Roger D Pickard, 28 Appletons, HADLOW, Kent TN11 0DT Committee Tel: 0732-850663 Secretary E-mail: [email protected] KENVAD::RDP Eclipsing Binary See Director Secretary Circulars Editor See Director Telephone Alert Numbers Nova and First phone Nova/Supernova Secretary. -
SILICON and OXYGEN ABUNDANCES in PLANET-HOST STARS Erik Brugamyer, Sarah E
The Astrophysical Journal, 738:97 (11pp), 2011 September 1 doi:10.1088/0004-637X/738/1/97 C 2011. The American Astronomical Society. All rights reserved. Printed in the U.S.A. SILICON AND OXYGEN ABUNDANCES IN PLANET-HOST STARS Erik Brugamyer, Sarah E. Dodson-Robinson, William D. Cochran, and Christopher Sneden Department of Astronomy and McDonald Observatory, University of Texas at Austin, 1 University Station C1400, Austin, TX 78712, USA; [email protected] Received 2011 February 4; accepted 2011 June 22; published 2011 August 16 ABSTRACT The positive correlation between planet detection rate and host star iron abundance lends strong support to the core accretion theory of planet formation. However, iron is not the most significant mass contributor to the cores of giant planets. Since giant planet cores are thought to grow from silicate grains with icy mantles, the likelihood of gas giant formation should depend heavily on the oxygen and silicon abundance of the planet formation environment. Here we compare the silicon and oxygen abundances of a set of 76 planet hosts and a control sample of 80 metal-rich stars without any known giant planets. Our new, independent analysis was conducted using high resolution, high signal-to-noise data obtained at McDonald Observatory. Because we do not wish to simply reproduce the known planet–metallicity correlation, we have devised a statistical method for matching the underlying [Fe/H] distributions of our two sets of stars. We find a 99% probability that planet detection rate depends on the silicon abundance of the host star, over and above the observed planet–metallicity correlation. -
Alberto Buzzoni Incarico Professionale Per Prestazione Di Collaborazione
Curriculum Vitae Alberto Buzzoni PERSONAL INFORMATION Alberto Buzzoni Viale Cavour 142, 44121 Ferrara (Fe) +39 051 6357322 [email protected] http://www.bo.astro.it/~eps/home.html Skype: [email protected] Sex Male | Date of birth 04/11/1958 | Nationality Italian Incarico professionale per prestazione di collaborazione occasionale POSITION con l’Osservatorio Astronomico della Regione Autonoma della Valle d’Aosta WORK EXPERIENCE 2004 - present Senior Associate Astronomer INAF – Osservatorio Astronomico di Bologna - Via Gobetti 93/3 40129 Bologna ▪ INAF National Representative in the Steering Committee of OCIS, the national government entity for coordination of Space Surveillance & Defense activities (since 2017) ▪ INAF official Representative, on behalf of the President, at the “Space Weather Initiative” of the Italian Embassy of Washington (USA, 2017) ▪ Professor in charge (Professore incaricato) at UNIBO, teaching the course of “Spectral Evolution of Galaxies” (since 2006). Advisor of 19 MSc and PhD theses in Astrophysics and Cosmology. ▪ National PI of a PRIN/INAF (2005/07). ▪ Visiting professor at the Universidad Nacional de La Plata (Argentina), ESO HQ in Santiago de Chile (Chile) (2008) and MIAPP (Munich, Germany) (2018) ▪ Invited professor at the National PhD School of Astrophysics (2008), at the 3rd SAIt/MIUR Youth Summer School (2013) and at the Youth Olympics of Astronomy (since 2010) ▪ Scientific Advisor of Space TV Broadcasting on Space Science themes (since 2013) ▪ SOC member of three international conferences. -
Atlas Menor Was Objects to Slowly Change Over Time
C h a r t Atlas Charts s O b by j Objects e c t Constellation s Objects by Number 64 Objects by Type 71 Objects by Name 76 Messier Objects 78 Caldwell Objects 81 Orion & Stars by Name 84 Lepus, circa , Brightest Stars 86 1720 , Closest Stars 87 Mythology 88 Bimonthly Sky Charts 92 Meteor Showers 105 Sun, Moon and Planets 106 Observing Considerations 113 Expanded Glossary 115 Th e 88 Constellations, plus 126 Chart Reference BACK PAGE Introduction he night sky was charted by western civilization a few thou - N 1,370 deep sky objects and 360 double stars (two stars—one sands years ago to bring order to the random splatter of stars, often orbits the other) plotted with observing information for T and in the hopes, as a piece of the puzzle, to help “understand” every object. the forces of nature. The stars and their constellations were imbued with N Inclusion of many “famous” celestial objects, even though the beliefs of those times, which have become mythology. they are beyond the reach of a 6 to 8-inch diameter telescope. The oldest known celestial atlas is in the book, Almagest , by N Expanded glossary to define and/or explain terms and Claudius Ptolemy, a Greco-Egyptian with Roman citizenship who lived concepts. in Alexandria from 90 to 160 AD. The Almagest is the earliest surviving astronomical treatise—a 600-page tome. The star charts are in tabular N Black stars on a white background, a preferred format for star form, by constellation, and the locations of the stars are described by charts. -
Chemical Abundance Study of Planetary Hosting Stars P
CHEMICAL ABUNDANCE STUDY OF PLANETARY HOSTING STARS P. Rittipruk and Y. W. Kang Department of Astronomy and Space Science Sejong University, Korea Planetary Hosting Stars Metallicity ∝ Probability of Hosting Planets Planetary Hosting Stars Planetary Hosting Stars 0.8 0.6 with planet 0.4 without planet 0.2 0.0 -0.2 -0.4 -0.6 Corr-Coef of [X/H] vs EP -0.8 -1.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 [M/H] Chemical abundances of 1111 FGK stars (Adibekyan et al, 2012) 1.2 c 0.8 0.4 0.0 -0.4 -0.8 Corr-Coef of [X/H] vs T with planet without planet -1.2 -1.5 -1.0 -0.5 0.0 0.5 1.0 [M/H] Chemical abundances of 1111 FGK stars (Adibekyan et al, 2012) HD 20794 ‘s Planets Earth to Sun = 1 AU Mass = 0.70 Msun Radius = 0.92 Rsun Distance = 6.06 pc Age = 14±6 Gyr (Bernkopf+2012) = 5.76±0.66 (Gyr)(Pepe+ 2011) bcde M sin i 0.0085 0.0076 0.0105 0.0150 (MJ) (2.7) (2.4) (4.8) (4.7) a(AU) 0.1207 0.2036 0.3499 0.509 P(days) 18.315 40.114 90.309 147.2 HD 47536 ‘s Planets ■ Mass = 0.94 Msun Earth to Sun = 1AU ■ Radius = 23.47 Rsun ■ Distance = 121.36 pc ■ Age = 9.33 Gyr (Silva+2006) HD 47536b HD 47536c** M sin i (MJ) 4.96 6.98 a(AU) 1.61 3.72 P(days) 430 2500 Observation CHIRON Echelle Spectrometer Wavelength cover : 4200 – 8800 A Narrow Slit (R = 120,000) SMART-1.5m at CTIO, La Serena, Chile Observed Spectrum Echelle Spectrum of HD20794 obtained using CHIRON Spectrometers Reduced Spectrum Spectrum of HD20794 after reduction plotted with synthesis spectrum Algorithms Rotational Velocity (v sin i) Determination Reiners & Schmitt (2003) ⁄ sin 0.610 0.062 0.027 0.012 0.004 -
Binocular Universe: Aurigan Treasures
Binocular Universe: Aurigan Treasures February 2012 Phil Harrington ead outside this evening and take a look high overhead. If you live in midnorthern latitudes, you will find a lone beacon cresting near the zenith as Hthe sky darkens. That's Capella, the Alpha (α) star of the constellation Auriga the Charioteer. Tracing back to ancient Rome, the name Capella translates as "She-Goat," a reference to the position it holds in the picture of the Charioteer. He is often portrayed as holding a goat and two kids in his arms. Above: Winter star map from Star Watch by Phil Harrington. Finder chart for this month's Binocular Universe, adapted from TUBA, www.philharrington.net/tuba.htm Today, we know that Capella is actually a binary star system lying some 42 light years away. Each of Capella's suns is classified as a type-G yellow star, like our Sun. That means that all three have roughly the same surface temperature, although our yellow dwarf Sun is only about one-tenth as large as either of the Capella giants. There is little hope of spotting the two Capella component stars through even the largest telescopes, since they are only separated by about 60 million miles, less than the distance from the Sun to Venus. The Charioteer’s pentagonal body highlights a wonderful area of the winter sky to scan with binoculars. There, you will find three of the season’s brightest open star clusters as well as an array of lesser known targets. M38, one of Auriga's three Messier open clusters, is centrally positioned within Auriga’s pentagonal body. -
Meteorok Észlelések (Szeptember-Október) 28 a Sülysápi MMTÉH-Találkozóról 31 Meteoros Hírek, Érdekességek 32 a "Rejtélyes" 191^
Gondolatok egy amatőr évkönyvről 1 Mit tud egy kis távcső? 3 Tapasztalatok kis Zeiss- távcsövekkel 6 Két műszer az NDK-ból 8 Ifjúsági csillagásztábor az NSZK-ban 9 Csillagászati megfigyelések és a légkör III. 12 "Csillagfigyelők" Japánban 15 Csillagászati hírek 16 Megfigyelések Hold (november) 21 Nap (november) 25 Bolygók Merkúr-Uránusz-Neptunusz- Plútó — 1988 26 Meteorok Észlelések (szeptember-október) 28 A sülysápi MMTÉH-találkozóról 31 Meteoros hírek, érdekességek 32 A "rejtélyes" 191^. évi Szabolcs megyei meteorhullás 35 Csillagfedések 38 Változócsillagok Észlelések (október-november) 39 Üj észlelési program: fedési változók megfigyelése 42 Az IU Aurigae hármas rendszere 43 RS Cygni 1980-1987 45 Mély-ég (október-november) 49 Az Orion kettőscsillagai 51 Jelenségnaptár (február)__________53 89.2392 - TIT-Nyomda, Budapest XIX. évf. 1. (151.) szám F.v.: dr. Préda Tibor Vol. 19, No. 1 (whole number 151) Formátum: A/5 - Példányszám: 1100 Terjedelem: 3,25 (A/5) ív Lapzárta: január 4._______________ Gondolatok egy amatőr évkönyvről A múlt év novemberében, tehát nemcsak időben, hanem aránylag jó előre, meg jelent a könyvesboltok kirakatában az 1989-re szóló Csillagászati évkönyv. A korábbi évek nagy időbeli csúszásaihoz képest ez számottevő érdem, de jó szerivel ez az egyetlen pozitívum, amit a magyar évkönyvről elmondhatunk. A Csillagászati évkönyv, anelynek tartalma, felépítése 38 év alatt nem válto zott, csupán vékonyabb lett, aligha elégíti ki a hazai műkedvelő csillagá szok igényeit! Az évkönyv az előző évekhez képest nem változott: tartalmazza a Nap és a Hold adatait (kelte, nyugta, koordinátái, látszó sugár stb); a heliografi- kus koordináta-adatokat, a Merkúr, a Vénusz, a Mars negvilágítottsági szá zalékát és a Szaturnusz gyűrűinek adatait; a nagybolygók ekvatoriális és heliocentrikus koordinátáit, látszó sugarát, fényességét stb; a Jupiter holdjainak jelenségeit, a Mars és a Jupiter centrálmeridián adatait; a 4,0- nál fényesebb csillagok adatait. -
Doctor of Philosophy
Study of Sun-like G Stars and Their Exoplanets Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy by Mr. SHASHANKA R. GURUMATH May, 2019 ABSTRACT By employing exoplanetary physical and orbital characteristics, aim of this study is to understand the genesis, dynamics, chemical abundance and magnetic field structure of Sun-like G stars and relationship with their planets. With reasonable constraints on selection of exoplanetary physical characteristics, and by making corrections for stellar rate of mass loss, a power law relationship between initial stellar mass and their exo- planetary mass is obtained that suggests massive stars harbor massive planets. Such a power law relationship is exploited to estimate the initial mass (1.060±0.006) M of the Sun for possible solution of “Faint young Sun paradox” which indeed indicates slightly higher mass compared to present mass. Another unsolved puzzle of solar system is angular momentum problem, viz., compare to Sun most of the angular momentum is concentrated in the solar system planets. By analyzing the exoplanetary data, this study shows that orbital angular momentum of Solar system planets is higher compared to orbital angular momentum of exoplanets. This study also supports the results of Nice and Grand Tack models that propose the idea of outward migration of Jovian planets during early history of Solar system formation. Furthermore, we have examined the influence of stellar metallicity on the host stars mass and exoplanetary physical and orbital characteristics that shows a non-linear relationship. Another important result is most of the planets in single planetary stellar systems are captured from the space and/or inward migration of planets might have played a dominant role in the final architecture of single planetary stellar systems. -
1– Observational Astronomy / PHYS-UA 13 / Fall 2013
{ 1 { Observational Astronomy / PHYS-UA 13 / Fall 2013/ Syllabus This course will teach you how to observe the sky with your naked eye, binoculars, and small telescopes. You will learn to recognize astronomical objects in the night sky, orient yourself using the basics of astronomical coordinates, learn the basics of observable lunar and planetary properties. You will be able to understand and predict, using charts and graphs, the changes we see in the night sky. You will learn to understand basic astronomical phenomena that can be observed with basic instrumentation. In addition, this course wishes to provide you with an insight into the scientific method. The instructors is: Dr. Federica Bianco (Meyer 523, [email protected]). Office hours are Tue 930AM (or by appointment). The TA is Nityasri Doddamane ([email protected]) Books The primary textbook is • The Ever-Changing Sky, James Kaler. In addition, we will use the • Edmund Mag 5 Star Atlas • Peterson Field Guide to the Stars and Planets, Jay Pasachoff • the laboratory manual. Each week you will attend one lecture (at 2pm Monday in Meyer 102) and one lab (at 7pm on either Monday or Wednesday in Meyer 224. You cannot switch between the lab sections, because in general they will be on different schedules). Arrive for the lab (on time!) at 7:00pm. The content of the lab will be discussed at the beginning of the lab session. When appropriate, and weather permitting, we will go to the observatory. For the labs: you MUST arrive on time, or else you will not be able to access the observatory.