– a Response to Sweatman and Tsikritsis
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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. -
CONTENTS Volume 75 Nos 9 & 10 October 2016 in This Issue: NEWS NOTES: PROXIMA CEN, HERA, ETA CAR ASSA ANNUAL GENERAL
Volume 75 Nos 9 & 10 October 2016 Volume 75 Nos 9 & 10 October 2016 CONTENTS News Note: Planet found around Proxima Cen ........................................................................ 191 News Note: Stellar Flares on Proxima Centauri ........................................................................ 192 News Note: HERA telescope gets $9.5 million funding injection. .............................................. 193 News Note: Eta Carinae: Violent stellar wind collision in the binary star monster ..................... 197 ANNUAL GENERAL MEETING OF THE ASTRONOMICAL SOCIETY OF SOUTHERN AFRICA ............. 200 Presidential address by Dr P de Villiers .................................................................................... 226 Solar Eclipse 1 September 2016 ............................................................................................... 230 ASSA News: SABC Interview on “The race to Mars” .................................................................. 235 Colloquia and Seminars ........................................................................................................... 236 Book Reviews .......................................................................................................................... 245 Sky Delights: Equuleus the Pony .............................................................................................. 247 In this issue: NEWS NOTES: PROXIMA CEN, HERA, ETA CAR ASSA ANNUAL GENERAL MEETING PARTIAL SOLAR ECLIPSE 1 SEPTEMBER BOOK REVIEWS, SKY DELIGHTS The -
N O T I C E This Document Has Been Reproduced From
N O T I C E THIS DOCUMENT HAS BEEN REPRODUCED FROM MICROFICHE. ALTHOUGH IT IS RECOGNIZED THAT CERTAIN PORTIONS ARE ILLEGIBLE, IT IS BEING RELEASED IN THE INTEREST OF MAKING AVAILABLE AS MUCH INFORMATION AS POSSIBLE P993-198422 International Collogium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas (4th) Held at the National institute of Standards and Technology Gaithersburg, Maryland on September 14-17, 1992 (U.S.) National inst. of Standards and Technology (PL) Gaithersburg, MD Apr 93 US. DEPARTMENT OF COMMERCE Ndioul Techcical IMermeNON Service B•11G 2-10i1A2 2 MIST-1 /4 U.S. VZPARTMENT OF COMMERCE (REV. NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY M GONTSOLw1N^BENN O4" COMM 4M /. MANUSCRIPT REVIEW AND APPROVAL "KIST/ p-850 ^' THIS NSTRUCTWNS: ATTACH ORIGINAL OF FORM TO ONE (1) COPY OF MANUSCIIN IT AND SEINE TO: PUBLICATIOM OATS NUMBER PRINTED PAGES April 1993 199 HE SECRETAIIY, APPROPRIATE EDITO RIAL REVIEW BOARD. ITLE AND SUBTITLE (CITE NN PULL) 4rh International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas -- POSTER PAPERS :ONTIEACT OR GRANT NUMBER TYPE OF REPORT AND/OR PERIOD COMM UTHOR(S) (LAST %,TAME, POST NNITIAL, SECOND INITIAL) PERFORM" ORGANIZATION (CHECK (IQ ONE SOX) EDITORS XXX MIST/GAITHERSBUIIG Sugar, Jack and Leckrone, B:;vid INST/BODUM JILA BOIRDE11 "ORATORY AND DIVISION NAMES (FIRST MOST AUTHOR ONLY) Physics Laboratory/Atomic Physics Division 'PONSORING ORGANIZATION NAME AND COMPLETE ADDRESS TREET, CITY. STATE. ZNh ^y((S/ ,T AiL7A - -ASO IECOMMENDsO FOR MIST PUBLICATION JOVIAMAL OF RESEMICM (MIST JRES) CIONOGRAPK (MIST MN) LETTER CIRCULAR J. PHYS. A CHEM. -
GRAVITY ASTROPHYSICS a Plan for the 1990S
ULTRAVIOLET, VISIBLE, and GRAVITY ASTROPHYSICS A Plan for the 1990s (NASA-NP-I52) ULTRAVIOLET, N94-24973 VISI3LE, ANO GRAVITY ASTROPHYSICS: A PLAN FOR THE 1990'S (NASA) 76 p Unclas HI190 0207794 ORIGINAL PAGE COLOR PHOTOGRAPH National Aeronautics and Space Administration I-oreword N ASA'sprioritiesOfficefrom oftheSpaceU.S. NationalScience Academyand Applicationsof Sciences.(OSSA)Guidancereceivesto theadviceOSSAon Astrophysicsscientific strategyDivision,and in particular, is provided by dedicated Academy committees, ad hoc study groups and, at 10-year intervals, by broadly mandated astronomy and astrophysics survey committees charged with making recommen- dations for the coming decade. Many of the Academy's recommendations have important implications for the conduct of ultraviolet and visible-light astronomy from space. Moreover, these areas are now poised for an era of rapid growth. Through technological progress, ultraviolet astronomy has already risen from a novel observational technique four decades ago to the mainstream of astronomical research today. Recent developments in space technology and instrumen- tation have the potential to generate comparably dramatic strides in observational astronomy within the next 10 years. In 1989, the Ultraviolet and Visible Astrophysics Branch of the OSSA Astrophysics Division recognized the need for a new, long-range plan that would implement the Academy's recommendations in a way that yielded the most advantageous use of new technology. NASA's Ultraviolet, Visible, and Gravity Astrophysics Management Operations Working Group was asked to develop such a plan for the 1990s. Since the Branch holds programmatic responsibility for space research in gravitational physics and relativity, as well as for ultraviolet and visible-light astrophysics, missions in those areas were also included. -
More Than a Vulture: a Response to Sweatman and Tsikritsis
Mediterranean Archaeology and Archaeometry, Vol. 17, No 2, (2017), pp. 57-74 Copyright © 2017 MAA Open Access. Printed in Greece. All rights reserved. DOI: 10.5281/zenodo.581724 MATTERS ARISING DECODING GÖBEKLI TEPE WITH ARCHAEOASTRONOMY: WHAT DOES THE FOX SAY?” by Sweatman, M.B. and D. Tsikritsis MORE THAN A VULTURE: A RESPONSE TO SWEATMAN AND TSIKRITSIS By Jens Notroff, Oliver Dietrich, Laura Dietrich, Cecilie Lelek Tvetmarken, Moritz Kinzel, Jonas Schlindwein, Devrim Sönmez, Lee Clare CRITICAL EVALUATION OF THE PAPER BY SWEATMAN, M. B. AND D. TSIKRITSIS, “DECODING GÖBEKLI TEPE WITH ARCHAEOASTRONOMY: WHAT DOES THE FOX SAY?” by Paul D. Burley MORE THAN A VULTURE: A RESPONSE TO SWEATMAN AND TSIKRITSIS Jens Notroff1, Oliver Dietrich1, Laura Dietrich1, Cecilie Lelek Tvetmarken1, Moritz Kinzel2, Jonas Schlindwein1, Devrim Sönmez3, Lee Clare1 1Deutsches Archäologisches Institut, Orient-Abteilung, Podbielskiallee 69–71, D-14195 Berlin, Germany 2Carsten Niebuhr Centre for Multicultural Heritage Department of Cross-Cultural and Regional Studies – ToRS University of Copenhagen, Karen Blixen Plads 8, DK-2300 Copenhagen S, Denmark 3Deutsches Archäologisches Institut, Abteilung Istanbul, Inönü Caddesi 10 TR-34437 Gümüssuyu-Istanbul, Turkey Received: 28/04/2017 Accepted: 01/05/2017 Corresponding author: Jens Notroff ([email protected]) ABSTRACT In a paper recently published in this journal, Martin B. Sweatman and Dimitrios Tsikritsis from the Universi- ty of Edinburgh (School of Engineering) have suggested an interpretation for the early Neolithic monumen- tal enclosures at Göbekli Tepe as space observatories and the site's complex iconography the commemora- tion of a catastrophic astronomical event ('Younger Dryas Comet Impact'). As the archaeologists excavating this site, we would like to comment on a few points that we feel require consideration in this discussion. -
Solar Writer Report for Abraham Lincoln
FIXED STARS A Solar Writer Report for Abraham Lincoln Written by Diana K Rosenberg Compliments of:- Stephanie Johnson Seeing With Stars Astrology PO Box 159 Stepney SA 5069 Australia Tel/Fax: +61 (08) 8331 3057 Email: [email protected] Web: www.esotech.com.au Page 2 Abraham Lincoln Natal Chart 12 Feb 1809 12:40:56 PM UT +0:00 near Hodgenville 37°N35' 085°W45' Tropical Placidus 22' 13° 08°ˆ ‡ 17' ¾ 06' À ¿É ‰ 03° ¼ 09° 00° 06° 09°06° ˆ ˆ ‡ † ‡ 25° 16' 41'08' 40' † 01' 09' Œ 29' ‰ 9 10 23° ¶ 8 27°‰ 11 Ï 27° 01' ‘ ‰02' á 7 12 ‘ áá 23° á 23° ¸ 23°Š27' á Š à „ 28' 28' 6 18' 1 10°‹ º ‹37' 13° 05' ‹ 5 Á 22° ½ 27' 2 4 01' Ü 3 07° Œ ƒ » 09' 23° 09° Ý Ü 06° 16' 06' Ê 00°ƒ 13° 22' Ý 17' 08°‚ Page 23 Astrological Summary Chart Point Positions: Abraham Lincoln Planet Sign Position House Comment The Moon Capricorn 27°Cp01' 12th The Sun Aquarius 23°Aq27' 12th read into 1st House Mercury Pisces 10°Pi18' 1st Venus Aries 7°Ar27' 1st read into 2nd House Mars Libra 25°Li29' 8th Jupiter Pisces 22°Pi05' 1st Saturn Sagittarius 3°Sg08' 9th read into 10th House Uranus Scorpio 9°Sc40' 8th Neptune Sagittarius 6°Sg41' 9th read into 10th House Pluto Pisces 13°Pi37' 1st The North Node Scorpio 6°Sc09' 8th The South Node Taurus 6°Ta09' 2nd The Ascendant Aquarius 23°Aq28' 1st The Midheaven Sagittarius 8°Sg22' 10th The Part of Fortune Capricorn 27°Cp02' 12th Chart Point Aspects Planet Aspect Planet Orb App/Sep The Moon Square Mars 1°32' Separating The Moon Conjunction The Part of Fortune 0°00' Applying The Sun Trine Mars 2°02' Applying The Sun Conjunction The Ascendant -
Gordon Taylor
Journal for Occultation Astronomy 2 0 1 6 – 04 Iridescent clouds AndreasTegtmeier during the annular eclipse 2016 Sept. 1 © IN THIS ISSUE: l Gordon Taylor An astronomical autobiography l ESOP XXXV University of Guildford Surrey, England l Beyond Jupiter The world of distant minor planets (120347) Salacia l Baily’s Beads Observation during the annular eclipse 2016 Sept. 1 l Leap Seconds Journal for Occultation Astronomy · Sept.-Nov. 2016 1 Dear reader, Writing articles for JOA: The rules below should be regarded while writing an article; using 2016 was a year of many highlights in occultation astronomy. The them will greatly facilitate the production and layout of ON! GAIA catalogue appeared with its first release. Our 20 inch portable If your article does not conform to these rules, please correct it. occultation telescope “M2” served its first scientific observation. There are 3 different possibilities for submitting articles: Once more an occultation by Pluto and Chariklo with its rings could n be observed to mention only the most remarkable events. pdf-articles (must be editable – these can be converted) n unformatted Word *.doc-files containing pictures/graphs or But now in 2017 the story will continue. Everybody is encouraged their names (marked red: <figure_01>) at the desired position(s) to record lightcurves of asteroidal occultations in order to improve n the mapping of their three-dimensional shapes. The observation of *.txt-files must contain at the desired position the name of each graph/picture mutual events of asteroids and their satellite(s) gives unprecedented insights, as for Kalliope in the first months of 2017. -
Small Astronomy Calendar for Amateur Astronomers 2019
IGAEF Small Astronomy Calendar for Amateur Astronomers 2019 C A L E N D A R F O R 2019 January February March Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa 1 2 3 4 5 1 2 1 2 6 7 8 9 10 11 12 3 4 5 6 7 8 9 3 4 5 6 7 8 9 13 14 15 16 17 18 19 10 11 12 13 14 15 16 10 11 12 13 14 15 16 20 21 22 23 24 25 26 17 18 19 20 21 22 23 17 18 19 20 21 22 23 27 28 29 30 31 24 25 26 27 28 24 25 26 27 28 29 30 31 April May June Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 1 2 3 4 1 7 8 9 10 11 12 13 5 6 7 8 9 10 11 2 3 4 5 6 7 8 14 15 16 17 18 19 20 12 13 14 15 16 17 18 9 10 11 12 13 14 15 21 22 23 24 25 26 27 19 20 21 22 23 24 25 16 17 18 19 20 21 22 28 29 30 26 27 28 29 30 31 23 24 25 26 27 28 29 30 July August September Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 1 2 3 1 2 3 4 5 6 7 7 8 9 10 11 12 13 4 5 6 7 8 9 10 8 9 10 11 12 13 14 14 15 16 17 18 19 20 11 12 13 14 15 16 17 15 16 17 18 19 20 21 21 22 23 24 25 26 27 18 19 20 21 22 23 24 22 23 24 25 26 27 28 28 29 30 31 25 26 27 28 29 30 31 29 30 October November December Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa 1 2 3 4 5 1 2 1 2 3 4 5 6 7 6 7 8 9 10 11 12 3 4 5 6 7 8 9 8 9 10 11 12 13 14 13 14 15 16 17 18 19 10 11 12 13 14 15 16 15 16 17 18 19 20 21 20 21 22 23 24 25 26 17 18 19 20 21 22 23 22 23 24 25 26 27 28 27 28 29 30 31 24 25 26 27 28 29 30 29 30 31 Easter Sunday: 2019 Apr 21 Phases of the Moon 2019 New Moon First Quarter Full Moon Last Quarter d h d h d h ⊕dist d h Jan 6 1.5 Jan 14 6.7 Jan 21 -
On the Application of Stark Broadening Data Determined with a Semiclassical Perturbation Approach
Atoms 2014, 2, 357-377; doi:10.3390/atoms2030357 OPEN ACCESS atoms ISSN 2218-2004 www.mdpi.com/journal/atoms Article On the Application of Stark Broadening Data Determined with a Semiclassical Perturbation Approach Milan S. Dimitrijević 1,2,* and Sylvie Sahal-Bréchot 2 1 Astronomical Observatory, Volgina 7, 11060 Belgrade, Serbia 2 Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique, Observatoire de Paris, UMR CNRS 8112, UPMC, 5 Place Jules Janssen, 92195 Meudon Cedex, France; E-Mail: [email protected] (S.S.-B.) * Author to whom correspondence should be addressed; E-Mail: [email protected]; Tel.: +381-64-297-8021; Fax: +381-11-2419-553. Received: 5 May 2014; in revised form: 20 June 2014 / Accepted: 16 July 2014 / Published: 7 August 2014 Abstract: The significance of Stark broadening data for problems in astrophysics, physics, as well as for technological plasmas is discussed and applications of Stark broadening parameters calculated using a semiclassical perturbation method are analyzed. Keywords: Stark broadening; isolated lines; impact approximation 1. Introduction Stark broadening parameters of neutral atom and ion lines are of interest for a number of problems in astrophysical, laboratory, laser produced, fusion or technological plasma investigations. Especially the development of space astronomy has enabled the collection of a huge amount of spectroscopic data of all kinds of celestial objects within various spectral ranges. Consequently, the atomic data for trace elements, which had not been -
Final Report the Goddard High Resolution Spectrograph Scientific
NASA-CR-204980 Final Report The Goddard High Resolution Spectrograph Scientific Support Contract NAS5-32494 December 13, 1993 - December 12, 1996 Computer Sciences Corporation 4061 Powder Mill Road Calverton, MD 20705 GHRS SSC Final Report i Contents List of Acronyms iv I. Introduction II. Summary of Activities 4 1 Project Support - Subtask 1 4 1.1 Proposal Preparation and Tracking ..................... 4 1.2 SMOV and Post-COSTAR Calibration ................... 5 1.3 In-Orbit Performance Papers ........................ 7 1.4 Operations Studies .............................. 7 1.4.1 GHRS Efficiency ........................... 7 1.4.2 GHRS Low-Noise Orbits ....................... 8 1.5 Meetings and Information Distribution ................... 9 1.6 Public Information .............................. 9 1.7 The World Wide Web ............................ 10 1.8 The GHRS Science Symposium ....................... 11 2 Data Analysis Facility - Subtask 2 12 2.1 Facility Management ............................. 12 2.2 GHRS Archive ................................ 13 2.3 GHRS Team Software ............................ 15 2.4 General Software Support .......................... 15 2.5 Data Bases .................................. 16 2.6 Data Reduction and Analysis Assistance .................. 17 3 Extragalactic Imagery- Subtask 3 17 3.1 Analysis of R136 ............................... 17 3.2 Eta Carinae .................................. 19 3.3 Star Clusters in M33 ............................. 19 3.3.1 NGC 595 ............................... 20 3.3,2 -
The Multiplicity of Intermediate and High-Mass B-Type Stars in the Near Infrared
Friedrich-Schiller- Universitat¨ Jena Physikalisch-Astronomische Fakultat¨ Astrophysikalisches Institut und Universitats-Sternwarte¨ The multiplicity of intermediate and high-mass B-type stars in the near infrared Die Multiplizit¨atmittelschwerer und massereicher B-Sterne im Nahen Infrarot —Dissertation— zur Erlangung des Akademischen Grades Doctor Rerum Naturalium (Dr. rer. nat.) vorgelegt dem Rat der Physikalisch-Astronomischen Fakult¨at der Friedrich-Schiller-Universit¨at Jena von Dipl.-Phys. Christian Adam geboren am 09. Februar 1980 in Aschersleben Gutachter: 1. Gutachter: Prof. Dr. Ralph Neuh¨auser Friedrich-Schiller-Universit¨at Jena Astrophysikalisches Institut und Universit¨ats-Sternwarte 2. Gutachter: Prof. Dr. Ernst Paunzen Faculty of Sciences Masaryk University Department of Theoretical Physics and Astrophysics 3. Gutachter: Prof. Dr. Pavel Kroupa Rheinische Friedrich-Wilhelms-Universit¨at Bonn Argelander-Institut f¨urAstronomie Tag der Disputation: 29. 06. 2017 “A work as this is never finished, one must simply declare it finished when one has within limits of time and circumstances, done what is possible.” “So eine Arbeit wird eigentlich nie fertig, man muß sie f¨urfertig erkl¨aren, wenn man nach Zeit und Umst¨anden das M¨oglichste getan hat.” Johann Wolfgang von Goethe, 16. M¨arz 1787 i Abstract In this thesis a volume-limited sample (D 1 kpc) of 316 B-type stars was investigated ≤ regarding their multiplicity status and the distribution of fundamental parameter such as their separation or mass-ratio distributions to improve our understanding of the formation processes of stellar and multiple systems. For this purpose public archival data of B-type stars in combination with own observations were analysed, obtained by diffraction-limited near-infrared imaging with NAOS-CONICA at the Very Large Telescope located at the Paranal observation site in Chile. -
The Sidereal Times May Issue 1997
The May SiderealSidereal TimesTimes 1997 THE OFFICIAL NEWSLETTER OF THE ALBUQUERQUE ASTRONOMICAL SOCIETY P.O. BOX 54072, ALBUQUERQUE, NEW MEXICO 87153-4072 13,500 Attend Be-Bop! April Meeting Preview The Albuquerque Astronomi- handled by Bill Eisenhood, Mike Because of this year’s schedule, cal Society can pat itself on the and Ruth Pendley, Elinor Gates, the Regular TAAS meeting for back for presenting the largest and myself. We had good cov- April will be incorporated into star party in the United States erage by all three TV stations Astronomy Day, at Coronado (World?) The “official” atten- and two radio talk shows, not Mall, on Saturday, April 19th, dance for Be-Bopp was put at to mention great write-ups in the 6:30 pm in an empty store (#59, 13,500 by The Rio Rancho Police Albuquerque Journal and Rio see page 11). We are very fortu- Dept. and nate to have, once again, TAAS the Parks member Great Bear (“G. B.”) and recre- Cornucopia as the guest ation staff. speaker! G. B. is a Park Ranger The Explorer at Chaco Canyon, and he will scouts talk about Chaco, its archeology parked over and archeoastronomy. The talk 5,200 cars for us. (By the 6:30. way, the at Mall Coronado at troop leader estimated held be will Meeting 16,000 folks) General 19 April The Any follow up newslet- The famous “Robinians”. ter article All Be-Bop photos by Bill Tondreau must sound will be for both the Public, and like a long thank you note to the Rancho Observer.