Planets Transiting Non-Eclipsing Binaries
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Inclination Evolution of Protoplanetary Disks Around Eccentric Binaries
Mon. Not. R. Astron. Soc. 000, 000{000 (0000) Printed 11 October 2017 (MN LATEX style file v2.2) Inclination Evolution of Protoplanetary Disks Around Eccentric Binaries J. J. Zanazzi1?, and Dong Lai1 1Cornell Center for Astrophysics, Planetary Science, Department of Astronomy, Cornell University, Ithaca, NY 14853, USA 11 October 2017 ABSTRACT It is usually thought that viscous torque works to align a circumbinary disk with the binary's orbital plane. However, recent numerical simulations suggest that the disk may evolve to a configuration perpendicular to the binary orbit (\polar alignment") if the binary is eccentric and the initial disk-binary inclination is sufficiently large. We carry out a theoretical study on the long-term evolution of inclined disks around eccentric binaries, calculating the disk warp profile and dissipative torque acting on the disk. For disks with aspect ratio H=r larger than the viscosity parameter α, bend- ing wave propagation effectively makes the disk precess as a quasi-rigid body, while viscosity acts on the disk warp and twist to drive secular evolution of the disk-binary inclination. We derive a simple analytic criterion (in terms of the binary eccentricity and initial disk orientation) for the disk to evolve toward polar alignment with the eccentric binary. When the disk has a non-negligible angular momentum compared to the binary, the final \polar alignment" inclination angle is reduced from 90◦. For typical protoplanetary disk parameters, the timescale of the inclination evolution is shorter than the disk lifetime, suggesting that highly-inclined disks and planets may exist orbiting eccentric binaries. Key words: Physical data and processes: accretion, accretion discs; Physical data and processes: hydrodynamics; stars: binaries: general; protoplanetary discs. -
Abstracts Booklet Livrets Des Résumés
Abstracts booklet Livrets des résumés From atoms to pebbles HERSCHEL’s view of Star and Planet Formation Symposium 20 to 23 March, 2012 Grenoble, France www.herschel2012.com ACM 2012-099 - CNES Toulouse ACM 2012-099 - CNES PCMI Programme National de Physique Chimie du Millieu Interstellaire Contents Introduction to the Symposium Oral Presentations ........................................... 2 Topic 1 – Pre-Collapse Phase Oral Presentations ........................................... 3 Topic 2 – Protostellar Phase Oral Presentations ........................................... 10 Topic 3 – Planet-Forming Circumstellar Disks Oral Presentations ........................................... 17 Topic 4 – Debris Disks and Exoplanets Oral Presentations ........................................... 23 Topic 1 – Pre-Collapse Phase Posters ................................................... 28 Topic 2 – Protostellar Phase Posters ................................................... 38 Topic 3 – Planet-Forming Circumstellar Disks Posters ................................................... 55 Topic 4 – Debris Disks and Exoplanets Posters ................................................... 70 1 INTRODUCTION to the Symposium Oral Presentations Herschel Space Observatory - Mission Update and Science Highlights Pilbratt, Goran¨ L. European Space Agency, Research and Science Support Dept, ESTEC/SRE-SA, Noordwijk, The Netherlands The Herschel Space Observatory was successfully launched on14May2009,itcarriesa3.5mpassivelycooledtele- scope, and three focal plane -
The PLATO 2.0 Mission
Exp Astron (2014) 38:249–330 DOI 10.1007/s10686-014-9383-4 ORIGINAL ARTICLE The PLATO 2.0 mission H. Rauer · C. Catala · C. Aerts · T. Appourchaux · W. Benz · A. Brandeker · J. Christensen-Dalsgaard · M. Deleuil · L. Gizon · M.-J. Goupil · M. G¨udel · E. Janot-Pacheco · M. Mas-Hesse · I. Pagano · G. Piotto · D. Pollacco · N. C. Santos · A. Smith · J.-C. Suarez´ · R. Szabo´ · S. Udry · V. Adibekyan · Y. Alibert · J.-M. Almenara · P. A maro-Seoane · M. Ammler-von Eiff · M. Asplund · E. Antonello · S. Barnes · F. Baudin · K. Belkacem · M. Bergemann · G. Bihain · A. C. Birch · X. Bonfils · I. Boisse · A. S. Bonomo · F. Borsa · I. M. Brandao˜ · E. Brocato · S. Brun · M. Burleigh · R. Burston · J. Cabrera · S. Cassisi · W. Chaplin · S. Charpinet · C. Chiappini · R. P. Church · Sz. Csizmadia · M. Cunha · M. Damasso · M. B. Davies · H. J. Deeg · R. F. D´ıaz · S. Dreizler · C. Dreyer · P. Eggenberger · D. Ehrenreich · P. Eigmuller ¨ · A. Erikson · R. Farmer · S. Feltzing · F. de Oliveira Fialho · P. Figueira · T. Forveille · M. Fridlund · R. A. Garc´ıa · P. Giommi · G. Giuffrida · M. Godolt · J. Gomes da Silva · T. Granzer · J. L. Grenfell · A. Grotsch-Noels · E. G¨unther · C. A. Haswell · A. P. Hatzes · G. Hebrard´ · S. Hekker · R. Helled · K. Heng · J. M. Jenkins · A. Johansen · M. L. Khodachenko · K. G. Kislyakova · W. Kley · U. Kolb · N. Krivova · F. Kupka · H. Lammer · A. F. Lanza · Y. Lebreton · D. Magrin · P. Marcos-Arenal · P. M. Marrese · J. P. Marques · J. Martins · S. Mathis · S. Mathur · S. Messina · A. -
Orders of Magnitude (Length) - Wikipedia
03/08/2018 Orders of magnitude (length) - Wikipedia Orders of magnitude (length) The following are examples of orders of magnitude for different lengths. Contents Overview Detailed list Subatomic Atomic to cellular Cellular to human scale Human to astronomical scale Astronomical less than 10 yoctometres 10 yoctometres 100 yoctometres 1 zeptometre 10 zeptometres 100 zeptometres 1 attometre 10 attometres 100 attometres 1 femtometre 10 femtometres 100 femtometres 1 picometre 10 picometres 100 picometres 1 nanometre 10 nanometres 100 nanometres 1 micrometre 10 micrometres 100 micrometres 1 millimetre 1 centimetre 1 decimetre Conversions Wavelengths Human-defined scales and structures Nature Astronomical 1 metre Conversions https://en.wikipedia.org/wiki/Orders_of_magnitude_(length) 1/44 03/08/2018 Orders of magnitude (length) - Wikipedia Human-defined scales and structures Sports Nature Astronomical 1 decametre Conversions Human-defined scales and structures Sports Nature Astronomical 1 hectometre Conversions Human-defined scales and structures Sports Nature Astronomical 1 kilometre Conversions Human-defined scales and structures Geographical Astronomical 10 kilometres Conversions Sports Human-defined scales and structures Geographical Astronomical 100 kilometres Conversions Human-defined scales and structures Geographical Astronomical 1 megametre Conversions Human-defined scales and structures Sports Geographical Astronomical 10 megametres Conversions Human-defined scales and structures Geographical Astronomical 100 megametres 1 gigametre -
October 2019 Newsletter for the Wiltshire, Swindon, Beckington Committee Changes Astronomical Societies
Volume25, Issue 2 NWASNEWS October 2019 Newsletter for the Wiltshire, Swindon, Beckington Committee Changes Astronomical Societies A couple of changes to the committee The other position to be filled at the Wiltshire Society Page 2 positions from the AGM to report. To- AGM was the position of chairman. I ny Vale has stepped back from the have stepped back into the post for a Swindon Stargazers 3 year while some members think Beckington AS 4 observing coordinator alongside Jona- than Gale and Chris Brooks has volun- about options running forward but NASA Space Place 5 teered to step in, and is working on the thank you for year in office Keith. How to power a space probe viewing night list for the year, although The good news is that I have had 2 Space News 6-15 a family bereavement means he will members ask to be considered for 3.5 Billion yo fossil confirmed be supplying a more complete list in next year. Purple Twilight causes the next few days. He will also post On the Wiltshire Society page is a for Mush Starship Announcements these on the Facebook members page Fertile Mice from ISS sale item, an NEQ6 skywatcher Triple Massive Black hole System and the website via Sam. mount and battery. This is barely Summer Asteroid Near Miss Peter has completed the speaker list used, but Philip Proven is stepping Io’s 500 day Cycle at Loki Volca- for the year, see page 2, February is away from viewing and has this for noe Metalic Asteroid May have had waiting confirmation. -
Principium and Keep an Eye on the Interstellar Societies Tend to Encourage
RINCIPIUM PThe Newsletter of the Institute for Interstellar Studies ™ Letter from the Director News from the Institute ‘Advances’ Cubesats Retrospective: Daedalus Book Reviews R IN O T F E R E S T T U E T I L T L S A N R I S ™ TUDIES Scientia ad sidera www.I4IS.org Knowledge to the Stars A letter from Kelvin F. Long Dear friends, I am proud to have been the originator of this organisation and I am deeply We live in exciting times. In recent years honoured that many others have shared in many planets have been detected orbiting that vision and are actively assisting with around other stars. This is helping us to its foundation. My colleagues and I will realise that there are places to go, as work to make the Institute a success in the predicted in the many works of science coming years. This excellent newsletter fiction over the last century. In addition, represents our first publications outreach we are now witnessing the emergence of activity, other than the Institute blog the commercial space sector and space page. In time we hope this newsletter will tourism. This gives us hope and optimism serve as an exciting information source for that despite the challenges we face down the community. I want to personally thank here on Earth, better times lay ahead for Keith Cooper for taking on this role of our space-aspiring society. A key Editor and Adrian Mann for assisting with component of this is learning how to work the editorial graphics and production. -
Twin Cities Creation Science Association
In the Beginning The Gauntlet is Thrown Down - Introduction Breaking Down the Equation . N = R* fp ne fl fi fc L Summary of Criticisms Conclusion Hand Outs Master Script Hand Out Life Outside Planet Earth 1961 How does the Drake Equation show that there is life on other planets in our Galaxy, or does it? N = the Number of civilizations in our galaxy with which radio- communication might be possible R* = the average Rate of star formation in our galaxy fp = the fraction of those stars that have planets ne = the average number of planets that can potentially support life per star that has planets (subscript e for ecoshell or earthlike) fl = the fraction of planets that could support life that actually develop life at some point fi = the fraction of planets with life that actually go on to develop intelligent life (in the form of civilizations) fc = the fraction of civilizations that develop a technology that releases detectable signs of their existence into space L = the Length of time for which such civilizations release detectable signals into space The Drake Equation . N = R* fp ne fl fi fc L Help! Can I exist? . N = R* fp ne fl fi fc L N is the number of detectable civilizations in our galaxy by a radio signal. Introduction Radio astronomer Frank Drake became the first person to start a systematic search for intelligent signals from the cosmos. Using the 25 meter dish of the National Radio Astronomy Observatory in Green Bank, West Virginia. Drake hosted a "search for extraterrestrial intelligence" (SETI) meeting on detecting their radio signals. -
Publications of the Faculties
PUBLICATIONS OF THE FACULTIES 1935-1936 f f I ( ", (, ,~ ( CONTENTS Page Foreword vii Administration 1-2 Science, Literature, and the Arts .. 2-24 Astronomy 2 Botany 2 Classics 5 English 5 Fine Arts 7 Geography 7 I Geology and Mineralogy 8 German 9 History 10 l Journalism 12 Mathematics 14 , Music 14 Philosophy 14 Physics 15 Political Science 15 { Psychology 17 Romance Languages 19 t Scandinavian Languages 20 Sociology 20 Speech 22 Zoology 23 Institute of Technology ... 24-36 Administration 24 f College of Engineering and Architecture ..... 25 Administration 25 Aeronautical Engineering 25 { Architecture 26 Civil Engineering 26 I Drawing and Descriptive Geometry .. 26 Electrical Engineering 27 Mathematics and Mechanics 27 Mechanical Engineering 27 School of Chemistry 28 Analytical Chemistry 28 Chemical Engineering 30 Inorganic Chemistry 31 \ Organic Chemistry .33 Physical Chemistry 34 ) School of Mines and Metallurgy .. 36 Metallography 36 Mines Experiment Station .............................................................. .. 36 'l iv CONTENTS Page Department of Agriculture .. 36-69 Administration 36 General 37 Agricultural Biochemistry 37 Agricultural Economics 41 Agricultural Engineering 44 Agricultural Extension 45 Agricultural Substations 51 Agronomy and Plant Genetics .... 54 Animal Husbandry ................... 55 Dairy Husbandry ..... 56 Entomology and Economic Zoology ........ 58 Forestry 60 Home Economics 61 Horficulture 62 Plant Pathology and Botany ... 65 Poultry Husbandry 67 Publications 67 Rhetoric 67 School of Agriculture -
The Rossiter–Mclaughlin Effect in Exoplanet Research
The Rossiter–McLaughlin effect in Exoplanet Research Amaury H.M.J. Triaud Abstract The Rossiter–McLaughlin effect occurs during a planet’s transit. It pro- vides the main means of measuring the sky-projected spin–orbit angle between a planet’s orbital plane, and its host star’s equatorial plane. Observing the Rossiter– McLaughlin effect is now a near routine procedure. It is an important element in the orbital characterisation of transiting exoplanets. Measurements of the spin–orbit an- gle have revealed a surprising diversity, far from the placid, Kantian and Laplacian ideals, whereby planets form, and remain, on orbital planes coincident with their star’s equator. This chapter will review a short history of the Rossiter–McLaughlin effect, how it is modelled, and will summarise the current state of the field before de- scribing other uses for a spectroscopic transit, and alternative methods of measuring the spin–orbit angle. Introduction The Rossiter–McLaughlin effect is the detection of a planetary transit using spec- troscopy. It appears as an anomalous radial-velocity variation happening over the Doppler reflex motion that an orbiting planet imparts on its rotating host star (Fig.1). The shape of the Rossiter–McLaughlin effect contains information about the ratio of the sizes between the planet and its host star, the rotational speed of the star, the impact parameter and the angle l (historically called b, where b = −l), which is the sky-projected spin–orbit angle. The Rossiter–McLaughlin effect was first reported for an exoplanet, in the case of HD 209458 b, by Queloz et al.(2000). -
The Universe Contents 3 HD 149026 B
History . 64 Antarctica . 136 Utopia Planitia . 209 Umbriel . 286 Comets . 338 In Popular Culture . 66 Great Barrier Reef . 138 Vastitas Borealis . 210 Oberon . 287 Borrelly . 340 The Amazon Rainforest . 140 Titania . 288 C/1861 G1 Thatcher . 341 Universe Mercury . 68 Ngorongoro Conservation Jupiter . 212 Shepherd Moons . 289 Churyamov- Orientation . 72 Area . 142 Orientation . 216 Gerasimenko . 342 Contents Magnetosphere . 73 Great Wall of China . 144 Atmosphere . .217 Neptune . 290 Hale-Bopp . 343 History . 74 History . 218 Orientation . 294 y Halle . 344 BepiColombo Mission . 76 The Moon . 146 Great Red Spot . 222 Magnetosphere . 295 Hartley 2 . 345 In Popular Culture . 77 Orientation . 150 Ring System . 224 History . 296 ONIS . 346 Caloris Planitia . 79 History . 152 Surface . 225 In Popular Culture . 299 ’Oumuamua . 347 In Popular Culture . 156 Shoemaker-Levy 9 . 348 Foreword . 6 Pantheon Fossae . 80 Clouds . 226 Surface/Atmosphere 301 Raditladi Basin . 81 Apollo 11 . 158 Oceans . 227 s Ring . 302 Swift-Tuttle . 349 Orbital Gateway . 160 Tempel 1 . 350 Introduction to the Rachmaninoff Crater . 82 Magnetosphere . 228 Proteus . 303 Universe . 8 Caloris Montes . 83 Lunar Eclipses . .161 Juno Mission . 230 Triton . 304 Tempel-Tuttle . 351 Scale of the Universe . 10 Sea of Tranquility . 163 Io . 232 Nereid . 306 Wild 2 . 352 Modern Observing Venus . 84 South Pole-Aitken Europa . 234 Other Moons . 308 Crater . 164 Methods . .12 Orientation . 88 Ganymede . 236 Oort Cloud . 353 Copernicus Crater . 165 Today’s Telescopes . 14. Atmosphere . 90 Callisto . 238 Non-Planetary Solar System Montes Apenninus . 166 How to Use This Book 16 History . 91 Objects . 310 Exoplanets . 354 Oceanus Procellarum .167 Naming Conventions . 18 In Popular Culture . -
Scientific and Societal Benefits of Interstellar Exploration
See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/275652484 Scientific and Societal Benefits of Interstellar Exploration Chapter · September 2014 CITATION READS 1 29 1 author: Ian A Crawford Birkbeck, University of Lon… 328 PUBLICATIONS 2,410 CITATIONS SEE PROFILE Available from: Ian A Crawford Retrieved on: 03 June 2016 Beyond the Boundary Chapter1 Scientific and Societal Benefits of Interstellar Exploration Ian A Crawford he growing realisation that planets are common companions of stars [1–2] has reinvigorated astronautical studies of how they might be explored using Tinterstellar space probes (for reviews see references [3-7], and also other chap- ters in this book). The history of Solar System exploration to-date shows us that spacecraft are required for the detailed study of planets, and it seems clear that we will eventually require spacecraft to make in situ studies of other planetary systems as well. The desirability of such direct investigation will become even more apparent if future astronomical observations should reveal spectral evidence for life on an apparently Earth-like planet orbiting a nearby star. Definitive proof of the existence of such life, and studies of its underlying biochemistry, cellular structure, ecological diversity and evolutionary history will require in situ inves- tigations to be made [8]. This will require the transportation of sophisticated scientific instruments across interstellar space. Moreover, in addition to the scientific reasons for engaging in a programme of interstellar exploration, there also exist powerful societal and cultural motivations. Most important will be the stimulus to art, literature and philosophy, and the general enrichment of our world view, which inevitably results from expanding the horizons of human experience [9,10]. -
Extrasolar Planets and Their Host Stars
Kaspar von Braun & Tabetha S. Boyajian Extrasolar Planets and Their Host Stars July 25, 2017 arXiv:1707.07405v1 [astro-ph.EP] 24 Jul 2017 Springer Preface In astronomy or indeed any collaborative environment, it pays to figure out with whom one can work well. From existing projects or simply conversations, research ideas appear, are developed, take shape, sometimes take a detour into some un- expected directions, often need to be refocused, are sometimes divided up and/or distributed among collaborators, and are (hopefully) published. After a number of these cycles repeat, something bigger may be born, all of which one then tries to simultaneously fit into one’s head for what feels like a challenging amount of time. That was certainly the case a long time ago when writing a PhD dissertation. Since then, there have been postdoctoral fellowships and appointments, permanent and adjunct positions, and former, current, and future collaborators. And yet, con- versations spawn research ideas, which take many different turns and may divide up into a multitude of approaches or related or perhaps unrelated subjects. Again, one had better figure out with whom one likes to work. And again, in the process of writing this Brief, one needs create something bigger by focusing the relevant pieces of work into one (hopefully) coherent manuscript. It is an honor, a privi- lege, an amazing experience, and simply a lot of fun to be and have been working with all the people who have had an influence on our work and thereby on this book. To quote the late and great Jim Croce: ”If you dig it, do it.