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Short-Term Dynamical Interactions Among Extrasolar Planets Gregory
Short-Term Dynamical Interactions Among Extrasolar Planets Gregory Laughlin l, John E. Chambers 1 'NASA Ames Research Center, Moffett Field, CA 94035 Received .; accepted 2 ABSTRACT We show that short-term perturbations among massive planets in multiple planet systemscan result in radial velocity variations of the central star which differ substantially from velocity variations derivedassumingthe planets are exe- cuting independent Keplerian motions. We discusstwo alternate fitting methods which can lead to an improved dynamical description of multiple planet sys- tems. In the first method, the osculating orbital elementsare determined via a Levenberg-Marquardt minimization schemedriving an N-body integrator. The secondmethod is an improved analytic model in which orbital elements such as the periods and longitudes of periastron are allowed to vary according to a simple model for resonantinteractions betweenthe planets. Both of these meth- ods can potentially determine the true massesfor the planets by eliminating the sin i degeneracy inherent in fits that assume independent Keplerian motions. As more radial velocity data is accumulated from stars such as GJ 876, these meth- ods should allow for unambiguous determination of the planetary masses and relative inclinations. Subject headings: stars: planetary systems 1. Introduction Several thousand nearby stars are now being surveyed for periodic radial velocity variations which indicate the presence of extrasolar planets (Marcy, Cochran & Mayor 2000). In the past year, the pace of discovery has increased, and there are now nearly sixty extrasolar planets known. Recently, systems with more than one planet have been found, and four (v Andromedae, -3- GJ 876, HD 83443,and HD 168443)are now known. -
SIAC Newsletter April 2015
April 2015 The Sidereal Times Southeastern Iowa Astronomy Club A Member Society of the Astronomical League Club Officers: Minutes March 19, 2015 Executive Committee President Jim Hilkin Vice President Libby published, Bill seconded, ship. Payment can be Vice President Libby Snipes Treasurer Vicki Philabaum Snipes called the meeng and the moon passed. made at a club meeng Secretary David Philabaum Chief Observer David Philabaum to order at 6:33 pm with Vicki gave the Treasurer's or by mailing them to PO Members-at-Large Claus Benninghoven the following members in report stang that the Box 14, West Burlington, Duane Gerling Blake Stumpf aendance: Carl Snipes , current balance in the IA 52655. John moved to Board of Directors Paul Sly, Chuck Block, checking account is approve the Treasurer's Chair Judy Hilkin Vice Chair Ray Reineke Claus Benninghoven, $1,914.04. She also stat- report, seconded by Secretary David Philabaum Members-at-Large Duane Gerling, Bill Stew- ed that she will be send- Chuck, and the moon Frank Libe Blake Stumpf art, Ray Reineke, John ing out noces reminding passed. Dave reported Jim Wilt Toney, and Dave & Vicki people when it is me to that the only groups on Audit Committee Dean Moberg (2012) Philabaum. Lavon Worley renew their member- the schedule at this me JT Stumpf (2013) John Toney (2014) from the conservaon ships. Dues remain $20 are the county Dark Newsletter board was also in aend- per year for a single Wings camps this sum- Karen Johnson ance. John moved to ap- membership and $30 per mer. Libby reported that -
Modern Physics
REVIEWS OF MODERN PHYSICS VoLUME 29, NuMBER 4 OcroBER, 1957 Synthesis of the Elements in Stars* E. MARGARET BURBIDGE, G. R. BURBIDGE, WILLIAM: A. FOWLER, AND F. HOYLE Kellogg Radiation1Laboratory, California Institute of Technology, and M aunt Wilson and Palomar Observatories, Carnegie Institution of Washington, California Institute of Technology, Pasadena, California "It is the stars, The stars above us, govern our conditions"; (King Lear, Act IV, Scene 3) but perhaps "The fault, dear Brutus, is not in our stars, But in ourselves," (Julius Caesar, Act I, Scene 2) TABLE OF CONTENTS Page I. Introduction ...............................................................· ............... 548 A. Element Abundances and Nuclear Structure. 548 B. Four Theories of the Origin of the Elements ............................................... 550 C. General Features of Stellar Synthesis ..................................................... 550 II. Physical Processes Involved in Stellar Synthesis, Their Place of Occurrence, and the Time-Scales Associated with Them ...............· ..................... · ................................. 551 A. Modes of Element Synthesis ............................................................. 551 B. Method of Assignment of Isotopes among Processes (i) to (viii) .............................. 553 C. Abundances and Synthesis Assignments Given in the Appendix. 555 D. Time-Scales for Different Modes of Synthesis .............................................. 556 III. Hydrogen Burning, Helium Burning, the a Process, -
Annual Report Volume 21 Fiscal 2018
ISSN 1346-1192 Annual Report of the National Astronomical Observatory of Japan Volume 21 Fiscal 2018 Cover Caption This image shows the galaxy cluster MACS J1149.5+2223 taken with the NASA/ESA Hubble Space Telescope and the inset image is the galaxy MACS1149-JD1 located 13.28 billion light- years away observed with ALMA. Here, the oxygen distribution detected with ALMA is depicted in green. Credit: ALMA (ESO/NAOJ/NRAO), NASA/ESA Hubble Space Telescope, W. Zheng (JHU), M. Postman (STScI <http://www.stsci.edu/>), the CLASH Team, Hashimoto et al. Postscript Publisher National Institutes of Natural Sciences National Astronomical Observatory of Japan 2-21-1 Osawa, Mitaka-shi, Tokyo 181-8588, Japan TEL: +81-422-34-3600 FAX: +81-422-34-3960 https://www.nao.ac.jp/ Printer Kyodo Telecom System Information Co., Ltd. 4-34-17 Nakahara, Mitaka-shi, Tokyo 181-0005, Japan TEX: +81-422-46-2525 FAX: +81-422-46-2528 Annual Report of the National Astronomical Observatory of Japan Volume 21, Fiscal 2018 Preface Saku TSUNETA Director General I Scientific Highlights April 2018 – March 2019 001 II Status Reports of Research Activities 01. Subaru Telescope 048 02. Nobeyama Radio Observatory 053 03. Mizusawa VLBI Observatory 056 04. Solar Science Observatory (SSO) 061 05. NAOJ Chile Observatory (NAOJ ALMA Project / NAOJ Chile) 064 06. Center for Computational Astrophysics (CfCA) 067 07. Gravitational Wave Project Office 070 08. TMT-J Project Office 072 09. JASMINE Project Office 075 10. RISE (Research of Interior Structure and Evolution of Solar System Bodies) Project Office 077 11. Solar-C Project Office 078 12. -
Saul J. Adelman
SAUL J. ADELMAN Department of Physics 1434 Fairfield Avenue The Citadel Charleston, SC 29407 Charleston, SC 29409 (843) 766-5348 (843) 953-6943 CURRENT POSITION: Professor of Physics, The Citadel (Aug. 22, 1989 - to date) PAST POSITIONS: Associate Professor of Physics, The Citadel (Aug. 23, 1983 to Aug. 21, 1989) NRC-NASA Research Associate, NASA Goddard Space Flight Center (Aug. 1, 1984 - July 31, 1986) Assistant Professor of Physics, The Citadel (Aug. 21, 1978 - Aug. 22, 1983) Assistant Professor of Astronomy, Boston University (Sept. 1, 1974 - Aug. 31, 1978) NAS/NRC Postdoctoral Resident Research Associate, NASA Goddard SpaceFlight Center (Aug. 1, 1972 - Aug. 31, 1974) EDUCATION: Ph.D. in Astronomy, California Institute of Technology, June 1972; Thesis: A Study of Twenty- One Sharp-lined Non-Variable Cool Peculiar A Stars, December 1971 (Dissertation Abstracts International 33, 543-13, number 77-22, 597) B.S. in Physics with high honors and high honors in physics, University of Maryland, June 1966 ACADEMIC HONORS: Phi Beta Kappa Phi Kappa Phi Sigma Pi Sigma Sigma Xi Summer Institute in Space Physics at Columbia University 1965 NDEA Title IV Fellowship 1966-69 ARCS Foundation Fellowship 1970-71 Citadel Development Foundation Faculty Fellowship 1987-93 Faculty Achievement Award 1989, 1997 Governor’s Award for Excellence in Scientific Research at a Primarily Undergraduate Institution 2011 OBSERVING EXPERIENCE: Guest Investigator, Dominion Astrophysical Observatory 1984-2016 Guest Investigator, Hubble Space Telescope 2003-05, 2011-16 Participant -
The Constellation Andromeda - from the Naked Eye to the Hubble Space Telescope
II SUMMER SCHOOL IN ASTRONOMY The Constellation Andromeda - From the naked eye to the Hubble Space Telescope Marija Borisov PhD Nada Pejovic Introduction Andromeda (The Chained Maiden) is a large and bright constellation of the northern hemisphere. Andromeda is nearly circumpolar, so it can be observed in the northern hemisphere almost during the whole year, but it can best be seen from September to February. Andromeda is easy to find because of the surrounding constellations. The W shape of Cassiopeia lies just above Andromeda, and the Great Square of Pegasus adjoi ns AdAndrome da. Map of the constellation There is plenty to see in this fall constellation. The Constellation Andromeda contains many notable galaxies and other deep sky objects. Here are presented the most significant and itinteres ting aspects of Andromeda constellation as well as the impact of the Hubble Space telescope on astronomical research. Mythology Andromeda is a constellation named for the princess Andromeda. She was a daughter of King Cepheus and Queen Cassiopeia CiCasiope ia bdbragged that she was more btiflbeautiful than the Nereid’s, the nymph-daughters of Poseidon. As a punishment to her mother, Andromeda was chained to a cliff for the monster Cetus, but Perseus rescued her. With his miraculous weapons, Perseus killed the monster and married Andromeda. The Andromeda Galaxy ( M31 or NGC224; in older texts - the Andromeda Nebula) The Great Andromeda Galaxyy( (M31) is one of the most distant objects visible by the naked eye It is a beautiful spiral galaxy much like the Milky Way Object Name: M31, NGC224 Object Description: Spiral Galaxy Position (J2000): R.A. -
The Extended Disc and Halo of the Andromeda Galaxy Observed with Spitzer-IRAC
MNRAS 459, 1403–1414 (2016) doi:10.1093/mnras/stw652 Advance Access publication 2016 March 20 The extended disc and halo of the Andromeda galaxy observed with Spitzer-IRAC Masoud Rafiei Ravandi,1‹ Pauline Barmby,1,2‹ Matthew L. N. Ashby,3 Seppo Laine,4 T. J. Davidge,5 Jenna Zhang,3 Luciana Bianchi,6 Arif Babul7 and S. C. Chapman8 1Department of Physics and Astronomy, Western University, 1151 Richmond Street, London, ON N6A 3K7, Canada 2Centre for Planetary Science and Exploration, Western University, 1151 Richmond Street, London, ON N6A 3K7, Canada 3Harvard–Smithsonian Center for Astrophysics, 60 Garden St, Cambridge, MA 02138, USA 4Spitzer Science Center, MS 314-6, California Institute of Technology, 1200 East California Blvd, Pasadena, CA 91125, USA 5Dominion Astrophysical Observatory, National Research Council of Canada, 5071 West Saanich Road, Victoria, BC V9E 2E7, Canada 6Department of Physics and Astronomy, The Johns Hopkins University, 3701 San Martin Drive, Baltimore, MD 21218, USA 7 Department of Physics and Astronomy, Elliott Building, University of Victoria, 3800 Finnerty Road, Victoria, BC V8P 5C2, Canada Downloaded from 8Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS B3H 4R2, Canada Accepted 2016 March 14. Received 2016 March 14; in original form 2015 December 15 http://mnras.oxfordjournals.org/ ABSTRACT We present the first results from an extended survey of the Andromeda galaxy (M31) using 41.1 h of observations by Spitzer-IRAC at 3.6 and 4.5 μm. This survey extends previous observations to the outer disc and halo, covering total lengths of 4◦.4 and 6◦.6 along the minor and major axes, respectively. -
219Th Meeting of the American Astronomical Society
219TH MEETING OF THE AMERICAN ASTRONOMICAL SOCIETY 8-12 JANUARY 2012 AUSTIN, TX All scientific sessions will be held at the: Austin Convention Center COUNCIL .......................... 2 500 East Cesar Chavez Street Austin, TX 78701-4121 EXHIBITORS ..................... 4 AAS Paper Sorters ATTENDEE SERVICES .......................... 9 Tom Armstrong, Blaise Canzian, Thayne Curry, Shantanu Desai, Aaron Evans, Nimish P. Hathi, SCHEDULE .....................15 Jason Jackiewicz, Sebastien Lepine, Kevin Marvel, Karen Masters, J. Allyn Smith, Joseph Tenn, SATURDAY .....................25 Stephen C. Unwin, Gerritt Vershuur, Joseph C. Weingartner, Lee Anne Willson SUNDAY..........................28 Session Numbering Key MONDAY ........................36 90s Sunday TUESDAY ........................91 100s Monday WEDNESDAY .............. 146 200s Tuesday 300s Wednesday THURSDAY .................. 199 400s Thursday AUTHOR INDEX ........ 251 Sessions are numbered in the Program Book by day and time. Please note, posters are only up for the day listed. Changes after 7 December 2011 are only included in the online program materials. 1 AAS Officers & Councilors President (6/2010-6/2013) Debra Elmegreen Vassar College Vice President (6/2009-6/2012) Lee Anne Willson Iowa State Univ. Vice President (6/2010-6/2013) Nicholas B. Suntzeff Texas A&M Univ. Vice President (6/2011-6/2014) Edward B. Churchwell Univ. of Wisconsin Secretary (6/2010-6/2013) G. Fritz Benedict Univ. of Texas, Austin Treasurer (6/2008-6/2014) Hervey (Peter) Stockman STScI Education Officer (6/2006-6/2012) Timothy F. Slater Univ. of Wyoming Publications Board Chair (6/2011-6/2015) Anne P. Cowley Arizona State Univ. Executive Officer (6/2006-Present) Kevin Marvel AAS Councilors Richard G. French Wellesley College (6/2009-6/2012) James D. -
Report from the Exoplanet Task Force
THE UNIVERSITY OF ARIZONA ® TUCSON ARIZONA Department of Planetary Sciences Tucson, Arizona 85721-0092 Lunar and Planetary Laboratory Tel: (520) 621-2789 1629 E. University Blvd. Fax: (520) 626-8250 May 18, 2008 Dr. Garth D. Illingworth Chair, Astronomy and Astrophysics Advisory Committee Department of Astronomy and Astrophysics University of California, Santa Cruz Dear Garth, I am pleased to transmit to you the report of the Exoplanet Task Force. The report is a comprehensive study of the search for and study of planets around other stars (exoplanets). The young but maturing field of exoplanets is perhaps one of the most compelling fields of study in science today—both because of the discoveries made to date on giant planets around other stars, and because the detection of planets just like our Earth (“Earth analogs”) is at last within reach technologically. In the Report we outline the need for a vigorous research program in exoplanets to understand our place in the cosmos: whether planets like our home Earth are a common or rare outcome of cosmic evolution. The strategy we developed is intended to address the following fundamental questions, in priority order, within three distinct 5-yr long phases, over a 15 year period: 1. What are the physical characteristics of planets in the habitable zones around bright, nearby stars? 2. What is the architecture of planetary systems? 3. When, how and in what environments are planets formed? The Report recommends a two-pronged strategy for the detection and characterization of planets the size of the Earth. For stars much less massive and cooler than our Sun (M-dwarfs), existing ground-based techniques including radial velocity and transit searches, and space-based facilities both existing and under development such as Spitzer and JWST, are adequate for finding and studying planets close to the mass and size of the Earth. -
Space Math V
National Aeronautics and Space Administration S pacM e aV th Space Math http://spacemath.gsfc.nasa.gov Space Math V The Apollo -11 Lander is revealed by its shadow near the center of this image taken by the Lunar Reconnaissance Orbiter in July, 2009. Use a millimeter ruler to determine the scale of the image, and the sizes and distances of various features! Space Math http://spacemath.gsfc.nasa.gov This collection of activities is based on a weekly series of space science problems distributed to thousands of teachers during the 2008- 2009 school year. They were intended for students looking for additional challenges in the math and physical science curriculum in grades 9 through 12. The problems were created to be authentic glimpses of modern science and engineering issues, often involving actual research data. The problems were designed to be ‘one-pagers’ with a Teacher’s Guide and Answer Key as a second page. This compact form was deemed very popular by participating teachers. For more weekly classroom activities about astronomy and space visit the NASA website, http://spacemath.gsfc.nasa.gov To suggest math problem or science topic ideas, contact the Author, Dr. Sten Odenwald at [email protected] Front and back cover credits: Saturn's Rings (Cassini NASA/ESA); Evolution of the Universe (NASA/WMAP); Abell-38 planetary nebula (Courtesy Jakoby, KPNO), Space Shuttle Launch (NASA) This booklet was created by the NRL, Hinode satellite program's Education and Public Outreach Project under grant N00173-06-1-G033, and an EPOESS-7 education grant, NNH08CD59C through the NASA Science Mission Directorate. -
Department of Embryology
Bibliography of the Carnegie Institution for Science July 1, 2017, to June 30, 2018 Department of Embryology Anderson J.L., T.S. Mulligan, M.C. Shen, H. Wang, C.M. Scahill, F.J. Tan, S.J. Du, E.M. Busch- Nentwich, and S.A. Farber. mRNA processing in mutant zebrafish lines generated by chemical and CRISPR-mediated mutagenesis produces unexpected transcripts that escape nonsense-mediated decay. PLoS Genetics. 13(11), e1007105, 2017. DeLuca, S. and Spradling, A.C. Efficient expression of genes in the Drosophila germline using a UAS-promoter free of interference by hsp70 piRNAs. Genetics. 209, 381-387, 2018. Deryusheva, S. and J.G. Gall. Orchestrated positioning of post-transcriptional modifications at the branch point recognition region of U2 snRNA. RNA. 24(1), 30-42. doi: 10.1261/rna.063842.117, 2017. Gaysinskaya V, B.F.Miller, C. De Luca, G.W. van der Heijden, K.D.Hansen, and A. Bortvin, Transient reduction of DNA methylation at the onset of meiosis in male mice, Epigenetics Chromatin. 11(1), 15, doi: 10.1186/s13072-018-0186-0, 2018. Huang Y, T. Li, S.C. Ems-McClung, C.E. Walczak, C. Prigent, X. Zhu, X. Zhang X, and Y. Zheng. Aurora A activation in mitosis promoted by BuGZ, J Cell Biol. 217(1), 107-116, doi: 10.1083/jcb.201706103, 2018 Lee, P-T, J. Zirin, O. Kanca, W-W Lin, K.L. Schulze, D. Li-Kroeger, R. Tao, C. Devereaux, Y. Hu, V. Chung, Y. Fang, Y. He, H. Pan, M. Ge, Z. Zuo, B. E. Housden, S. E. -
Instituto De Astrofísica De Andalucía IAA-CSIC
1 2 Cover Pictures Lower right inset. Main picture. Also in October 2015 the IAA was awarded with the 2014 Rodríguez-Acosta Foundation October 2015. The instrument CARMENES Honour Medal. The IAA relevantastrophysical (Calar Alto high-Resolution search for M research and technical achievements and its dwarfs with Exoearths with Near-infrared and prominent position among international optical Échelle Spectrographs) is delivered at research centers was recognized by the the 3.5m Calar Alto telescope for its technical committee of the Rodríguez-Acosta and scientifc commisioning. CARMENES near- Foundation for this award. infrared channelhas been integrated and verified at the IAA clean laboratoriesby ateam The Rodríguez-Acosta Foundation Honour led by Dr. Pedro J. Amado. Medal is awarded to institutions and individuals with a recognized social, cultural The operation of this channel in the near- or artistic track. Her majesty the Spanish infrared has posed a major technological Queen, Andrés Segovia, Federico Mayor challenge. Its sensibility and stability demand Zaragozaand Enrique Morente, among others, its operation at a temperature of 133 degrees had previously been awarded with the below zero with a variation range not larger Rodríguez-Acosta Foundation Honour Medal. than a thousandth of a degree. CARMENES capability to observe simultaneously in the optical and near- infrared spectral ranges makes it a world-wide unique instrument for the search of exo- earths around dwarf stars. The picture shows the CARMENES near- infrared channel and the three meters long and a meter and a half in diameter holding tank at the IAA clean laboratories. 1 2 3 DIRECTOR ’S FOREWORD In 2015 a new ERC Consolidator grant was awarded to one of our young scientists leading an exciting project on lightning propagation and high-energy emissions within coupled multi- In 2015 we celebrated the 40th anniversary ofthe original model simulations.