Dr. Ringwald's CV
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Physics Teaching and Research at Göttingen University 2 GREETING from the PRESIDENT 3
Physics Teaching and Research at Göttingen University 2 GREETING FROM THE PRESIDENT 3 Greeting from the President Physics has always been of particular importance for the Current research focuses on solid state and materials phy- Georg-August-Universität Göttingen. As early as 1770, Georg sics, astrophysics and particle physics, biophysics and com- Christoph Lichtenberg became the first professor of Physics, plex systems, as well as multi-faceted theoretical physics. Mathematics and Astronomy. Since then, Göttingen has hos- Since 2003, the Physics institutes have been housed in a new ted numerous well-known scientists working and teaching physics building on the north campus in close proximity to in the fields of physics and astronomy. Some of them have chemistry, geosciences and biology as well as to the nearby greatly influenced the world view of physics. As an example, Max Planck Institute (MPI) for Biophysical Chemistry, the MPI I would like to mention the foundation of quantum mecha- for Dynamics and Self Organization and the MPI for Solar nics by Max Born and Werner Heisenberg in the 1920s. And System Research. The Faculty of Physics with its successful Georg Christoph Lichtenberg and in particular Robert Pohl research activities and intense interdisciplinary scientific have set the course in teaching as well. cooperations plays a central role within the Göttingen Cam- pus. With this booklet, the Faculty of Physics presents itself It is also worth mentioning that Göttingen physicists have as a highly productive and modern faculty embedded in an accepted social and political responsibility, for example Wil- attractive and powerful scientific environment and thus per- helm Weber, who was one of the Göttingen Seven who pro- fectly prepared for future scientific challenges. -
Unknown Amorphous Carbon II. LRS SPECTRA the Sample Consists Of
Table I A summary of the spectral -features observed in the LRS spectra of the three groups o-f carbon stars. The de-finition o-f the groups is given in the text. wavelength Xmax identification Group I B - 12 urn E1 9.7 M™ Silicate 12 - 23 jim E IB ^m Silicate Group II < 8.5 M"i A C2H2 CS? 12 - 16 f-i/n A 13.7 - 14 Mm C2H2 HCN? 8 - 10 Mm E 8.6 M"i Unknown 10 - 13 Mm E 11.3 - 11 .7 M«> SiC Group III 10 - 13 MJn E 11.3 - 11 .7 tun SiC B - 23 Htn C Amorphous carbon 1 The letter in this column indicates the nature o-f the -feature: A = absorption; E = emission; C indicates the presence of continuum opacity. II. LRS SPECTRA The sample consists of 304 carbon stars with entries in the LRS catalog (Papers I-III). The LRS spectra have been divided into three groups. Group I consists of nine stars with 9.7 and 18 tun silicate features in their LRS spectra pointing to oxygen-rich dust in the circumstellar shell. These sources are discussed in Paper I. The remaining stars all have spectra with carbon-rich dust features. Using NIR photometry we have shown that in the group II spectra the stellar photosphere is the dominant continuum. The NIR color temperature is of the order of 25OO K. Paper II contains a discussion of sources with this class of spectra. The continuum in the group III spectra is probably due to amorphous carbon dust. -
JOHN R. THORSTENSEN Address
CURRICULUM VITAE: JOHN R. THORSTENSEN Address: Department of Physics and Astronomy Dartmouth College 6127 Wilder Laboratory Hanover, NH 03755-3528; (603)-646-2869 [email protected] Undergraduate Studies: Haverford College, B. A. 1974 Astronomy and Physics double major, High Honors in both. Graduate Studies: Ph. D., 1980, University of California, Berkeley Astronomy Department Dissertation : \Optical Studies of Faint Blue X-ray Stars" Graduate Advisor: Professor C. Stuart Bowyer Employment History: Department of Physics and Astronomy, Dartmouth College: { Professor, July 1991 { present { Associate Professor, July 1986 { July 1991 { Assistant Professor, September 1980 { June 1986 Research Assistant, Space Sciences Lab., U.C. Berkeley, 1975 { 1980. Summer Student, National Radio Astronomy Observatory, 1974. Summer Student, Bartol Research Foundation, 1973. Consultant, IBM Corporation, 1973. (STARMAP program). Honors and Awards: Phi Beta Kappa, 1974. National Science Foundation Graduate Fellow, 1974 { 1977. Dorothea Klumpke Roberts Award of the Berkeley Astronomy Dept., 1978. Professional Societies: American Astronomical Society Astronomical Society of the Pacific International Astronomical Union Lifetime Publication List * \Can Collapsed Stars Close the Universe?" Thorstensen, J. R., and Partridge, R. B. 1975, Ap. J., 200, 527. \Optical Identification of Nova Scuti 1975." Raff, M. I., and Thorstensen, J. 1975, P. A. S. P., 87, 593. \Photometry of Slow X-ray Pulsars II: The 13.9 Minute Period of X Persei." Margon, B., Thorstensen, J., Bowyer, S., Mason, K. O., White, N. E., Sanford, P. W., Parkes, G., Stone, R. P. S., and Bailey, J. 1977, Ap. J., 218, 504. \A Spectrophotometric Survey of the A 0535+26 Field." Margon, B., Thorstensen, J., Nelson, J., Chanan, G., and Bowyer, S. -
NL 2011-2 Backup
Newsletter 2011-3 August 2011 www.variablestarssouth.org Hawkes Bay Astronomical Society members at the site of their partially completed Pukerangi roll-off observatory. Photo by Graham Palmer and provided by Col Bembrick. Col’s recollections of the 2011 RASNZ conference hosted by the Hawkes Bay Astronomical Society appear on page 11. Contents From the director - Tom Richards ........................................................................................................................... 2 Variables from Linden – Towards the Hub - Alan Plummer ................................................................. 4 BL Telescopii - Observations of the 2011 eclipse - Peter F Williams ............................................ 7 A DSLR bright Cepheid project - Can you help? - Stan Walker ........................................................ 9 RASNZ Conference Napier, 2011 - Col Bembrick ................................................................................... 11 Recurrent Novae - Stan Walker .............................................................................................................................. 13 Southern Binaries DSLR Project - Mark Blackford .................................................................................. 17 Equatorial Eclipsing Binaries Project - Tom Richards ............................................................................ 19 SPADES Report - Tom Richards ........................................................................................................................... -
Abstracts Connecting to the Boston University Network
20th Cambridge Workshop: Cool Stars, Stellar Systems, and the Sun July 29 - Aug 3, 2018 Boston / Cambridge, USA Abstracts Connecting to the Boston University Network 1. Select network ”BU Guest (unencrypted)” 2. Once connected, open a web browser and try to navigate to a website. You should be redirected to https://safeconnect.bu.edu:9443 for registration. If the page does not automatically redirect, go to bu.edu to be brought to the login page. 3. Enter the login information: Guest Username: CoolStars20 Password: CoolStars20 Click to accept the conditions then log in. ii Foreword Our story starts on January 31, 1980 when a small group of about 50 astronomers came to- gether, organized by Andrea Dupree, to discuss the results from the new high-energy satel- lites IUE and Einstein. Called “Cool Stars, Stellar Systems, and the Sun,” the meeting empha- sized the solar stellar connection and focused discussion on “several topics … in which the similarity is manifest: the structures of chromospheres and coronae, stellar activity, and the phenomena of mass loss,” according to the preface of the resulting, “Special Report of the Smithsonian Astrophysical Observatory.” We could easily have chosen the same topics for this meeting. Over the summer of 1980, the group met again in Bonas, France and then back in Cambridge in 1981. Nearly 40 years on, I am comfortable saying these workshops have evolved to be the premier conference series for cool star research. Cool Stars has been held largely biennially, alternating between North America and Europe. Over that time, the field of stellar astro- physics has been upended several times, first by results from Hubble, then ROSAT, then Keck and other large aperture ground-based adaptive optics telescopes. -
Dramatic Change in the Boundary Layer in the Symbiotic Recurrent
Astronomy & Astrophysics manuscript no. tcrb˙submitted˙to˙arxiv © ESO 2018 July 4, 2018 Dramatic change in the boundary layer in the symbiotic recurrent nova T Coronae Borealis. G. J. M. Luna,1,2,3, K. Mukai,4,5 J. L. Sokoloski,6 T. Nelson,7 P. Kuin,8 A. Segreto,9 G. Cusumano,9 M. Jaque Arancibia,10,11 and N. E. Nu˜nez,11 1 CONICET-Universidad de Buenos Aires, Instituto de Astronom´ıa y F´ısica del Espacio, (IAFE), Av. Inte. G¨uiraldes 2620, C1428ZAA, Buenos Aires, Argentina e-mail: [email protected] 2 Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Buenos Aires, Argentina 3 Universidad Nacional Arturo Jauretche, Av. Calchaqu´ı6200, F. Varela, Buenos Aires, Argentina 4 CRESST and X-ray Astrophysics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA 5 Department of Physics, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA 6 Columbia Astrophysics Lab 550 W120th St., 1027 Pupin Hall, MC 5247 Columbia University, New York, New York 10027, USA 7 Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260 8 University College London, Mullard Space Science Laboratory, Holmbury St. Mary, Dorking, RH5 6NT, U.K. 9 INAF - Istituto di Astrofisica Spaziale e Fisica Cosmica, Via U. La Malfa 153, I-90146 Palermo, Italy 10 Departamento de F´ısica y Astronom´ıa, Universidad de La Serena, Av. Cisternas 1200, La Serena, Chile. 11 Instituto de Ciencias Astron´omicas, de la Tierra y del Espacio (ICATE-CONICET), Av. Espa˜na Sur 1512, J5402DSP, San Juan, Argentina ABSTRACT A sudden increase in the rate at which material reaches the most internal part of an accretion disk, i.e. -
Fall/Winter 2003 Print Issue
T he Magazine of San 360Diego State University F all/Winter 2003 Welcome to 360 online! To increase the type size for easier reading, change the percentage field in your toolbar or use the settings found under the “view” tab. To jump from one article to another, use the “table of contents” or “thumbnail” links under the tabs to the left. If no tabs appear, click on the navigation symbol in your toolbar to reveal them. International Inspiration. SDSU students are taking flight as citizens of the world. Real-World Referee. FTC chair Tim Muris rules for consumers and fair competition. One Singular Sensation. Musical theatre hopefuls polish their acts. Teaching Teachers. San Diego State’s original mandate remains a top priority. The English word “excellence” comes from the Latin “excellere,” meaning “to climb higher.” Excellence is not about elitism; it is about life’s We invite you to join us in our climb. SDSU is elemental core: the struggle to fully express and increasingly recognized among the nation’s major expand one’s capabilities. urban universities. With more than 39,000 appli- cants competing for fewer than 7,300 undergraduate California’s fiscal and political difficulties do not vacancies this fall, our incoming freshmen are better exempt San Diego State from its responsibilities for prepared than ever before. Their average GPA is excellence. We will continue our important work – estimated at 3.5; their average SAT is projected at providing a high-quality learning experience for our 1071. We expect great things of these newest Aztecs students, supporting our faculty in their teaching as they pursue their education and then move on to and research, and serving our community as a assume positions of responsibility and leadership in resource and problem-solver. -
September 2020 BRAS Newsletter
A Neowise Comet 2020, photo by Ralf Rohner of Skypointer Photography Monthly Meeting September 14th at 7:00 PM, via Jitsi (Monthly meetings are on 2nd Mondays at Highland Road Park Observatory, temporarily during quarantine at meet.jit.si/BRASMeets). GUEST SPEAKER: NASA Michoud Assembly Facility Director, Robert Champion What's In This Issue? President’s Message Secretary's Summary Business Meeting Minutes Outreach Report Asteroid and Comet News Light Pollution Committee Report Globe at Night Member’s Corner –My Quest For A Dark Place, by Chris Carlton Astro-Photos by BRAS Members Messages from the HRPO REMOTE DISCUSSION Solar Viewing Plus Night Mercurian Elongation Spooky Sensation Great Martian Opposition Observing Notes: Aquila – The Eagle Like this newsletter? See PAST ISSUES online back to 2009 Visit us on Facebook – Baton Rouge Astronomical Society Baton Rouge Astronomical Society Newsletter, Night Visions Page 2 of 27 September 2020 President’s Message Welcome to September. You may have noticed that this newsletter is showing up a little bit later than usual, and it’s for good reason: release of the newsletter will now happen after the monthly business meeting so that we can have a chance to keep everybody up to date on the latest information. Sometimes, this will mean the newsletter shows up a couple of days late. But, the upshot is that you’ll now be able to see what we discussed at the recent business meeting and have time to digest it before our general meeting in case you want to give some feedback. Now that we’re on the new format, business meetings (and the oft neglected Light Pollution Committee Meeting), are going to start being open to all members of the club again by simply joining up in the respective chat rooms the Wednesday before the first Monday of the month—which I encourage people to do, especially if you have some ideas you want to see the club put into action. -
Chapter 11 CORINTHIAN COLLEGES, INC., Et Al. Case
Case 15-10952-KJC Doc 712 Filed 08/05/15 Page 1 of 2014 IN THE UNITED STATES BANKRUPTCY COURT FOR THE DISTRICT OF DELAWARE In re: Chapter 11 CORINTHIAN COLLEGES, INC., et al.1 Case No. 15-10952-CSS Debtor. AFFIDAVIT OF SERVICE STATE OF CALIFORNIA } } ss.: COUNTY OF LOS ANGELES } SCOTT M. EWING, being duly sworn, deposes and says: 1. I am employed by Rust Consulting/Omni Bankruptcy, located at 5955 DeSoto Avenue, Suite 100, Woodland Hills, CA 91367. I am over the age of eighteen years and am not a party to the above-captioned action. 2. On July 30, 2015, I caused to be served the: a) Notice of (I) Deadline for Casting Votes to Accept or Reject the Debtors’ Plan of Liquidation, (II) The Hearing to Consider Confirmation of the Combined Plan and Disclosure Statement and (III) Certain Related Matters, (the “Confirmation Hearing Notice”), b) Debtors’ Second Amended and Modified Combined Disclosure Statement and Chapter 11 Plan of Liquidation, (the “Combined Disclosure Statement/Plan”), c) Class 1 Ballot for Accepting or Rejecting Debtors’ Chapter 11 Plan of Liquidation, (the “Class 1 Ballot”), d) Class 4 Ballot for Accepting or Rejecting Debtors’ Chapter 11 Plan of Liquidation, (the “Class 4 Ballot”), e) Class 5 Ballot for Accepting or Rejecting Debtors’ Chapter 11 Plan of Liquidation, (the “Class 5 Ballot”), f) Class 4 Letter from Brown Rudnick LLP, (the “Class 4 Letter”), ____________________________________________________________________________________________________________________________________________________________________________________________________________ 1 The Debtors in these cases, along with the last four digits of each Debtor’s federal tax identification number, are: Corinthian Colleges, Inc. -
Ludwig Neidhart
© Dr. Ludwig Neidhart, 1998, 2007 „Als die Zeit erfüllt war ...“ Ein Diskussionsbeitrag zu Grundproblemen der biblischen Weihnachtgeschichte und der Datierung der Geburt Christi von Ludwig Neidhart (überarbeitete Version, Stand 07.04.2019) Erstmals erschienen in: Brücke zum Menschen Nr. 133, 1. Quartal 1998 Leicht überarbeitete Version in: Pro Sancta Ecclesia Nr. 21, 2007, S. 20–110 Auszug mit dem Titel ‚Die Magier und der Stern’ in: Dörthe Emig-Herchen (Hg.), Silberglanz in stillen Gassen. Weihnachts-Anthologie 2007, Frankfurt a.M., 2007, S. 221–246 Inhaltsverzeichnis 1. Wie kam man auf den 25. Dezember?...................................................................................................2 2. Wie alt ist das Geburtsfest Christi am 25. Dezember?........................................................................3 3. Frühchristliche Traditionen über den Geburtstag Jesu......................................................................4 4. Kann Christus im Dezember geboren sein?.........................................................................................7 5. Biblische Chronologie des Lebens Christi............................................................................................8 5.1. Die Dauer des öffentlichen Wirkens Jesu......................................................................................8 5.2. Jesus starb am 7. April des Jahres 30.............................................................................................9 5.3. Exkurs über die Stunde der Kreuzigung.....................................................................................13 -
Astronomy 111 Recitation #1
Astronomy 142 Recitation #10 5 April 2013 Formulas to remember Leavitt's Law (classical Cepheid variables): MV =−2.77 log Π− 1.69 d mMVV−=5log 10 pc Hubble’s Law (galaxies in the uniform Universal expansion): vr = Hd0 -1 -1 -1 -1 H0 = 74.2 km sec Mpc= 22.8 km sec Mly Redshift z =(λλ − 00) λ SN Ia magnitude(dereddened) 00 d mMVV=++5log 25 Mpc 0 MV = −19.14 dE dm Black hole accretion Lc= = εε2 , ≈ 0.1. dt dt Eddington luminosity 25 4 3GMmpe m c 2eL LL<= ; M> E 4 25 23e Gmpe m c Workshop problems Warning! The workshop problems you will do in groups in Recitation are a crucial part of the process of building up your command of the concepts important in AST 142 and subsequent courses. Do not, therefore, do your work on scratch paper and discard it. Better for each of you to keep your own account of each problem, in some sort of bound notebook. 1. (Team discussion) A type Ia supernova happens when a the mass of a white dwarf, accreting material from a close-by normal or giant stellar companions, approaches the Stoner-Anderson- Chandrasekhar mass, MM= 1.4 . Review your previous experience with degenerate stars and answer the following questions, in order. a. If mass is added to a white dwarf, does its radius get larger, smaller, or stay the same? Is this different from what happens when mass is added to an ordinary, nondegenerate star? 2013 University of Rochester 1 All rights reserved Astronomy 142, Spring 2013 b. -
Stars and Their Spectra: an Introduction to the Spectral Sequence Second Edition James B
Cambridge University Press 978-0-521-89954-3 - Stars and Their Spectra: An Introduction to the Spectral Sequence Second Edition James B. Kaler Index More information Star index Stars are arranged by the Latin genitive of their constellation of residence, with other star names interspersed alphabetically. Within a constellation, Bayer Greek letters are given first, followed by Roman letters, Flamsteed numbers, variable stars arranged in traditional order (see Section 1.11), and then other names that take on genitive form. Stellar spectra are indicated by an asterisk. The best-known proper names have priority over their Greek-letter names. Spectra of the Sun and of nebulae are included as well. Abell 21 nucleus, see a Aurigae, see Capella Abell 78 nucleus, 327* ε Aurigae, 178, 186 Achernar, 9, 243, 264, 274 z Aurigae, 177, 186 Acrux, see Alpha Crucis Z Aurigae, 186, 269* Adhara, see Epsilon Canis Majoris AB Aurigae, 255 Albireo, 26 Alcor, 26, 177, 241, 243, 272* Barnard’s Star, 129–130, 131 Aldebaran, 9, 27, 80*, 163, 165 Betelgeuse, 2, 9, 16, 18, 20, 73, 74*, 79, Algol, 20, 26, 176–177, 271*, 333, 366 80*, 88, 104–105, 106*, 110*, 113, Altair, 9, 236, 241, 250 115, 118, 122, 187, 216, 264 a Andromedae, 273, 273* image of, 114 b Andromedae, 164 BDþ284211, 285* g Andromedae, 26 Bl 253* u Andromedae A, 218* a Boo¨tis, see Arcturus u Andromedae B, 109* g Boo¨tis, 243 Z Andromedae, 337 Z Boo¨tis, 185 Antares, 10, 73, 104–105, 113, 115, 118, l Boo¨tis, 254, 280, 314 122, 174* s Boo¨tis, 218* 53 Aquarii A, 195 53 Aquarii B, 195 T Camelopardalis,