The Journal of the University of Notre Dame College of Science Summer 2005, Volume 2, Number 1
Total Page:16
File Type:pdf, Size:1020Kb

Load more
Recommended publications
-
Spiral Arms in Disks: Planets Or Gravitational Instability?
Spiral Arms in Disks: Planets or Gravitational Instability? Item Type Article Authors Dong, Ruobing; Najita, Joan R.; Brittain, Sean Citation Ruobing Dong et al 2018 ApJ 862 103 DOI 10.3847/1538-4357/aaccfc Publisher IOP PUBLISHING LTD Journal ASTROPHYSICAL JOURNAL Rights © 2018. The American Astronomical Society. Download date 27/09/2021 14:50:30 Item License http://rightsstatements.org/vocab/InC/1.0/ Version Final published version Link to Item http://hdl.handle.net/10150/631109 The Astrophysical Journal, 862:103 (19pp), 2018 August 1 https://doi.org/10.3847/1538-4357/aaccfc © 2018. The American Astronomical Society. Spiral Arms in Disks: Planets or Gravitational Instability? Ruobing Dong (董若冰)1,2 , Joan R. Najita3, and Sean Brittain3,4 1 Department of Physics & Astronomy, University of Victoria, Victoria BC V8P 1A1, Canada 2 Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA; [email protected] 3 National Optical Astronomical Observatory, 950 North Cherry Avenue, Tucson, AZ 85719, USA; [email protected] 4 Department of Physics & Astronomy, 118 Kinard Laboratory, Clemson University, Clemson, SC 29634-0978, USA; [email protected] Received 2018 May 8; revised 2018 June 2; accepted 2018 June 13; published 2018 July 27 Abstract Spiral arm structures seen in scattered-light observations of protoplanetary disks can potentially serve as signposts of planetary companions. They can also lend unique insights into disk masses, which are critical in setting the mass budget for planet formation but are difficult to determine directly. A surprisingly high fraction of disks that have been well studied in scattered light have spiral arms of some kind (8/29), as do a high fraction (6/11) of well- studied Herbig intermediate-mass stars (i.e., Herbig stars >1.5 Me). -
The Gemini NICI Planet-Finding Campaign: the Frequency of Giant
The Gemini NICI Planet-Finding Campaign: The Frequency of Giant Planets around Young B and A Stars Eric L. Nielsen,1 Michael C. Liu,1 Zahed Wahhaj,2 Beth A. Biller,3 Thomas L. Hayward,4 Laird M. Close,5 Jared R. Males,6 Andrew J. Skemer,7 Mark Chun,1 Christ Ftaclas,1 Silvia H. P. Alencar,6 Pawel Artymowicz,7 Alan Boss,8 Fraser Clarke,9 Elisabete de Gouveia Dal Pino,10 Jane Gregorio-Hetem,10 Markus Hartung,4 Shigeru Ida,11 Marc Kuchner,12 Douglas N. C. Lin,13 I. Neill Reid,14 Evgenya L. Shkolnik,15 Matthias Tecza,9 Niranjan Thatte,9 Douglas W. Toomey16 ABSTRACT We have carried out high contrast imaging of 70 young, nearby B and A stars to search for brown dwarf and planetary companions as part of the Gemini NICI Planet- Finding Campaign. Our survey represents the largest, deepest survey for planets around high-mass stars (≈1.5–2.5 M⊙) conducted to date and includes the planet hosts β Pic and Fomalhaut. We obtained follow-up astrometry of all candidate companions within 400 AU projected separation for stars in uncrowded fields and identified new low-mass 1Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu HI 96822, USA 2European Southern Observatory, Alonso de C´ordova 3107, Vitacura, Santiago, Chile 3Max-Planck-Institut f¨ur Astronomie, K¨onigstuhl 17, 69117 Heidelberg, Germany 4Gemini Observatory, Southern Operations Center, c/o AURA, Casilla 603, La Serena, Chile 5Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA 6Departamento de Fisica - ICEx - Universidade Federal de Minas Gerais, Av. -
Science with MATISSE
Science with MATISSE Sebastian Wolfa, Bruno Lopezb, Jean-Charles Augereauc, Marco Delbob, Carsten Dominikd, Thomas Henninge, Karl-Heinz Hofmannf, Michiel Hogerheijdeg, Josef Hronh, Walter Jaffeg, Thierry Lanzb, Klaus Meisenheimere, Florentin Millourb, Eric Pantini, Roman Petrovb, Dieter Schertlf, Roy van Boekele, Gerd Weigeltf, Andrea Chiavassab, Attila Juhaszj, Alexis Matterb, Anthony Meillandb, Nicolas Nardettob, and Claudia Paladinik aUniversit¨atzu Kiel, Institut f¨urTheoretische Physik und Astrophysik, Leibnizstr. 15, 24098 Kiel, Germany bLaboratoire Lagrange, UMR7293, Universit´ede Nice Sophia-Antipolis, CNRS, Observatoire de la C^oted'Azur, Nice, France cUJF-Grenoble 1/CNRS-INSU, Institut de Plan´etologie d'Astrophysique de Grenoble (IPAG) UMR 5274, Grenoble, 38041, France dSterrenkundig Instituut "Anton Pannekoek", Science Park 904, 1098 XH, Amsterdam, The Netherlands; Afdeling Sterrenkunde, Radboud Universiteit Nijmegen, Postbus 9010, 6500 GL, Nijmegen, The Netherlands eMax-Planck-Institut f¨urAstronomie, K¨onigstuhl17, 69117 Heidelberg, Germany fMax-Planck-Institut f¨urRadioastronomie, Auf dem H¨ugel69, 53121 Bonn, Germany gSterrewacht Leiden, Universiteit Leiden, Niels-Bohr-Weg 2, 2300 CA, Leiden, The Netherlands hInstitut f¨urAstronomie, Universit¨atWien, T¨urkenschanzstraße 17, 1180 Wien, Austria iCEA/DSM/IRFU/Service d'Astrophysique, CE Saclay, France jInstitute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA, United Kingdom kInstitut d'Astronomie et d'Astrophysique, Universite' libre de Bruxelles, Boulevard du Triomphe CP 226, B-1050 Bruxelles, Belgium ABSTRACT We present an overview of the scientific potential of MATISSE, the Multi Aperture mid-Infrared SpectroScopic Experiment for the Very Large Telescope Interferometer. For this purpose we outline selected case studies from various areas, such as star and planet formation, active galactic nuclei, evolved stars, extrasolar planets, and solar system minor bodies and discuss strategies for the planning and analysis of future MATISSE observations. -
Qjlir Fa Fentpalnrf
QJlir f a fentpalnrf Volume 16. Issue ^29. DURHAM, N. H., JUNE 3, 1926. Price, 10 Cents HARRY W. STEERE, JR. BOOK AND SCROLL PRES. HETZEL ON PRESIDENT OF CLASS EARLY TRYOUTS HOST TO VISITORS PLANS FOR ANNUAL COMMENCEMENT The final meeting of the year of Leads Graduates For Next Two Years FOR DEBATERS OF UNIVERSITY STAND COMPLETED TOUR OF EUROPE Book and Scroll was held in the par —Miss Marian Arthur Is Vice- lor of Smith H all last Monday night President— Class Day Speak Tau Kappa Alpha Latest at eight o’clock. Representatives of Group to Hear Lectures ers Chosen Commencement Speech by Dr. William F. Anderson By Well-Known Statesman Honorary Campus Society T h e N e w H a m p s h ir e , T h e Golden Bishop of the Methodist-Episcopal Church, Boston B u ll and Spires were guests of the Harry W. Steere, Jr., Amesbury, organization. WILL LEAVE JUNE 23 N. E. LEAGUE FORMED COMMENCEMENT BALL FRIDAY BEGINS PROGRAM Mass., was elected president of the The meeting was opened with in graduating class of the university at troductory remarks from President Party Will Consist of Educators, Ed Two Subjects for Debates— Probably a meeting of the seniors held in Neville, who stressed the necessity The Rev. Vaughan Dabney, Pastor of Second Church, Dorchester, Mass. to itors, and Other Men of Public Life Men’s and Two Women’s Inter Thompson Hall last Monday evening. of making plans for the coming year. Deliver Baccalaureate Sermon Sunday Morning in Men’s Gymnas — To Study Economic and Polit collegiate Contests— Tryouts Miss Marian Arthur, Manchester, The organization has some very in ium— Alumni Day Scheduled for Saturday— Week Ends ical Situation of Europe in September was elected vice-president; Elsworth teresting plans under way which will With Commencement Exercises Monday, June 14 D. -
As Heard on TV
Hugvísindasvið As Heard on TV A Study of Common Breaches of Prescriptive Grammar Rules on American Television Ritgerð til BA-prófs í Ensku Ragna Þorsteinsdóttir Janúar 2013 2 Háskóli Íslands Hugvísindasvið Enska As Heard on TV A Study of Common Breaches of Prescriptive Grammar Rules on American Television Ritgerð til BA-prófs í Ensku Ragna Þorsteinsdóttir Kt.: 080288-3369 Leiðbeinandi: Pétur Knútsson Janúar 2013 3 Abstract In this paper I research four grammar variables by watching three seasons of American television programs, aired during the winter of 2010-2011: How I Met Your Mother, Glee, and Grey’s Anatomy. For background on the history of prescriptive grammar, I discuss the grammarian Robert Lowth and his views on the English language in the 18th century in relation to the status of the language today. Some of the rules he described have become obsolete or were even considered more of a stylistic choice during the writing and editing of his book, A Short Introduction to English Grammar, so reviewing and revising prescriptive grammar is something that should be done regularly. The goal of this paper is to discover the status of the variables ―to lay‖ versus ―to lie,‖ ―who‖ versus ―whom,‖ ―X and I‖ versus ―X and me,‖ and ―may‖ versus ―might‖ in contemporary popular media, and thereby discern the validity of the prescriptive rules in everyday language. Every instance of each variable in the three programs was documented and attempted to be determined as correct or incorrect based on various rules. Based on the numbers gathered, the usage of three of the variables still conforms to prescriptive rules for the most part, while the word ―whom‖ has almost entirely yielded to ―who‖ when the objective is called for. -
Queer Identities and Glee
IDENTITY AND SOLIDARITY IN ONLINE COMMUNITIES: QUEER IDENITIES AND GLEE Katie M. Buckley A Thesis Submitted to the Graduate College of Bowling Green State University in partial fulfillment of the requirements for the degree of Master of Music August 2014 Committee: Katherine Meizel, Advisor Kara Attrep Megan Rancier © 2014 Katie Buckley All Rights Reserved iii ABSTRACT Katherine Meizel, Advisor Glee, a popular FOX television show that began airing in 2009, has continuously pushed the limits of what is acceptable on American television. This musical comedy, focusing on a high school glee club, incorporates numerous stereotypes and real-world teenage struggles. This thesis focuses on the queer characteristics of four female personalities: Santana, Brittany, Coach Beiste, and Coach Sue. I investigate how their musical performances are producing a constructive form of mass media by challenging hegemonic femininity through camp and by producing relatable queer female role models. In addition, I take an ethnographic approach by examining online fan blogs from the host site Tumblr. By reading the blogs as a digital archive and interviewing the bloggers, I show the positive and negative effects of an online community and the impact this show has had on queer girls, allies, and their worldviews. iv This work is dedicated to any queer human being who ever felt alone as a teenager. v ACKNOWLEDGMENTS I would like to extend my greatest thanks to my teacher and advisor, Dr. Meizel, for all of her support through the writing of this thesis and for always asking the right questions to keep me thinking. I would also like to thank Dr. -
Discovery of an Inner Disk Component Around HD 141569 A
Discovery of an Inner Disk Component around HD 141569 A KONISHI, Mihoko1*, GRADY, Carol A.2/3, SCHNEIDER, Glenn4, SHIBAI, Hiroshi5, MCELWAIN, Michael W.3 NESVOLD, Erika R.6, KUCHNER, Marc J.3, CARSON, Joseph7, DEBES, John. H.8, GASPAR, Andras4 HENNING, Thomas K.9, HINES, Dean C.8, HINZ, Philip M.4, JANG-CONDELL, Hannah10 MORO-MARTÍN, Amaya8, PERRIN, Marshall8, RODIGAS, Timothy J.6, SERABYN, Eugene11 SILVERSTONE, Murray D.2, STARK, Christopher C.8, TAMURA, Motohide12/1/13, WEINBERGER, Alycia J.6 WISNIEWSKI, John. P.14 1: NAOJ, 2: Eureka Scientific, 3: Goddard Space Flight Center, 4: The University of Arizona, 5: Osaka University, 6: Carnegie Institution of Washington, 7: College of Charleston, 8: Space Telescope Science Institute, 9: Max Planck Institute for Astronomy, 10: University of Wyoming, 11: Jet Propulsion Laboratory, 12: Astorobiology Center, 13: University of Tokyo, 14: University of Oklahoma Planets are considered to form in protoplanetary disks during star formation process. Protoplanetary disks and planets interact with each other. Thus, detail understanding of disk structures is important in order to elucidate star and planet evolution. Disks have been imaged recently, and it has become clear that they have complex structures. This work [1] is focused on a disk around HD 141569 A (spectral type: B9.5, age: 5 Myr). This is a young debris disk, containing various complex structures that have been imaged in the optical and near-infrared (e.g., [2,3,4]). The disk has a double-ring structure (inner and outer ring) with spiral structures, and a cavity inside the inner ring (< 175 AU). -
Ro-Vibrational CO Detected in the Β Pictoris Circumstellar Disk Matthew R
Clemson University TigerPrints Publications Physics and Astronomy 6-1-2011 Ro-vibrational CO Detected in the β Pictoris Circumstellar Disk Matthew R. Troutman University of Missouri Kenneth H. Hinkle National Optical Astronomy Observatory Joan R. Najita National Optical Astronomy Observatory Terrence W. Rettig University of Notre Dame Sean D. Brittain Clemson University, [email protected] Follow this and additional works at: https://tigerprints.clemson.edu/physastro_pubs Part of the Astrophysics and Astronomy Commons Recommended Citation Please use publisher's recommended citation. This Article is brought to you for free and open access by the Physics and Astronomy at TigerPrints. It has been accepted for inclusion in Publications by an authorized administrator of TigerPrints. For more information, please contact [email protected]. Ro-vibrational CO Detected in the β Pictoris Circumstellar Disk Matthew R. Troutman1 Department of Physics & Astronomy, University of Missouri - St. Louis, 8001 Natural Bridge Rd., St. Louis, MO, 63121; [email protected] Kenneth H. Hinkle National Optical Astronomy Observatory, 950 North Cherry Avenue, Tucson, AZ 85719; [email protected] Joan R. Najita National Optical Astronomy Observatory, 950 North Cherry Avenue, Tucson, AZ 85719; [email protected] Terrence W. Rettig Center for Astrophysics, University of Notre Dame, Notre Dame, IN 46556; [email protected] Sean D. Brittain Department of Physics & Astronomy, 118 Kinard Laboratory, Clemson University, Clemson, SC 29634; [email protected] ABSTRACT We present high resolution near-infrared spectra of β Pictoris - a nearby young star with a debris disk. Fundamental low-J CO absorption lines are detected and strict upper limits are placed on the flux of v=2-1 low-J CO emission lines. -