Space Weathering of Asteroids
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Space Weathering of Itokawa Particles: Implications for Regolith Evolution
46th Lunar and Planetary Science Conference (2015) 2351.pdf SPACE WEATHERING OF ITOKAWA PARTICLES: IMPLICATIONS FOR REGOLITH EVOLUTION. Eve L. Berger1 and Lindsay P. Keller2, 1Geocontrol Systems – Jacobs JETS contract – NASA Johnson Space Center, Houston TX 77058, [email protected], 2NASA Johnson Space Center Introduction: Space weathering processes such as tion rate of 4.1 ±1.2 × 104 tracks/cm2/year at 1AU [6] solar wind irradiation and micrometeorite impacts are are: ~80,000 years for 0211, ~70,000 years for 0192, known to alter the the properties of regolith materials and ~24,000 years for 0125. exposed on airless bodies [1]. The rates of space Discussion: Cosmic-ray exposure: Measurements weathering processes however, are poorly constrained of cosmic-ray exposure (CRE) ages of Itokawa parti- for asteroid regoliths, with recent estimates ranging cles [6-8] reveal that these grains are relatively young, over many orders of magnitude [e.g., 2, 3]. The return of surface samples by JAXA’s Hayabusa mission to ≤1−1.5 Ma, when compared to the distribution of ex- asteroid 25143 Itokawa, and their laboratory analysis posure ages for LL chondrite meteorites (8−50Ma) [9]. provides “ground truth” to anchor the timescales for The CRE ages for Itokawa grains are consistent with a space weathering processes on airless bodies. Here, we stable regolith at meter-depths for ~106 years. use the effects of solar wind irradiation and the Solar flare particle tracks: Based on the solar flare accumulation of solar flare tracks recorded in Itokawa particle track production rate in olivine at 1AU [6], the grains to constrain the rates of space weathering and Itokawa grains recorded solar flare tracks over time- yield information about regolith dynamics on these scales of <105 years. -
ORGANIC GEOCHEMISTRY: CHALLENGES for the 21St CENTURY
ORGANIC GEOCHEMISTRY: CHALLENGES FOR THE 21st CENTURY VOL. 2 Book of Abstracts of the Communications presented to the 22nd International Meeting on Organic Geochemistry Seville – Spain. September 12 -16, 2005 Editors: F.J. González-Vila, J.A. González-Pérez and G. Almendros Equipo de trabajo: Rocío González Vázquez Antonio Terán Rodíguez José Mª de la Rosa Arranz Maquetación: Rocío González Vázquez Fotomecánica e impresión: Akron Gráfica, Sevilla © 22nd IMOG, Sevilla 2005 Depósito legal: SE-61181-2005 I.S.B.N.: 84-689-3661-8 COMMITTEES INVOLVED IN THE ORGANIZATION OF THE 22 IMOG 2005 Chairman: Francisco J. GONZÁLEZ-VILA Vice-Chairman: José A. GONZÁLEZ-PÉREZ Consejo Superior de Investigaciones Científicas (CSIC) Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS) Scientific Committee Francisco J. GONZÁLEZ-VILA (Chairman) IRNAS-CSIC, Spain Gonzalo ALMENDROS Claude LARGEAU CCMA-CSIC, Spain ENSC, France Pim van BERGEN José C. del RÍO SHELL Global Solutions, The Netherlands IRNAS-CSIC, Spain Jørgen A. BOJESEN-KOEFOED Jürgen RULLKÖTTER GEUS, Denmark ICBM, Germany Chris CORNFORD Stefan SCHOUTEN IGI, UK NIOZ, The Netherlands Gary ISAKSEN Eugenio VAZ dos SANTOS NETO EXXONMOBIL, USA PETROBRAS RD, Brazil Local Committee José Ramón de ANDRÉS IGME, Spain Mª Carmen DORRONSORO Mª Enriqueta ARIAS Universidad del País Vasco Universidad de Alcalá Antonio GUERRERO Tomasz BOSKI Universidad de Sevilla Universidad do Algarve, Faro, Portugal Juan LLAMAS Ignacio BRISSON ETSI Minas de Madrid Repsol YPF Albert PERMANYER Juan COTA Universidad de Barcelona Universidad de Sevilla EAOG Board Richard L. PATIENCE (Chairman) Sylvie DERENNE (Secretary) Ger W. van GRAAS (Treasurer) Walter MICHAELIS (Awards) Francisco J. GONZALEZ-VILA (Newsletter) C. -
Astrophysics in 2002
UC Irvine UC Irvine Previously Published Works Title Astrophysics in 2002 Permalink https://escholarship.org/uc/item/8rz4m3tt Journal Publications of the Astronomical Society of the Pacific, 115(807) ISSN 0004-6280 Authors Trimble, V Aschwanden, MJ Publication Date 2003 DOI 10.1086/374651 License https://creativecommons.org/licenses/by/4.0/ 4.0 Peer reviewed eScholarship.org Powered by the California Digital Library University of California Publications of the Astronomical Society of the Pacific, 115:514–591, 2003 May ᭧ 2003. The Astronomical Society of the Pacific. All rights reserved. Printed in U.S.A. Invited Review Astrophysics in 2002 Virginia Trimble Department of Physics and Astronomy, University of California, Irvine, CA 92697; and Astronomy Department, University of Maryland, College Park, MD 20742; [email protected] and Markus J. Aschwanden Lockheed Martin Advanced Technology Center, Solar and Astrophysics Laboratory, Department L9-41, Building 252, 3251 Hanover Street, Palo Alto, CA 94304; [email protected] Received 2003 January 29; accepted 2003 January 29 ABSTRACT. This has been the Year of the Baryon. Some low temperature ones were seen at high redshift, some high temperature ones were seen at low redshift, and some cooling ones were (probably) reheated. Astronomers saw the back of the Sun (which is also made of baryons), a possible solution to the problem of ejection of material by Type II supernovae (in which neutrinos push out baryons), the production of R Coronae Borealis stars (previously-owned baryons), and perhaps found the missing satellite galaxies (whose failing is that they have no baryons). A few questions were left unanswered for next year, and an attempt is made to discuss these as well. -
Tommune Toimum
TOMMUNEUS009931118B2TOIMUM (12 ) United States Patent ( 10 ) Patent No. : US 9 , 931 , 118 B2 Shelton , IV et al. (45 ) Date of Patent: Apr. 3 , 2018 ( 54 ) REINFORCED BATTERY FOR A SURGICAL 770014 ( 2013 .01 ) ; H02J 770047 ( 2013. 01 ) ; INSTRUMENT A61B 2017 / 0003 (2013 . 01 ) ; A61B 2017/ 0046 (2013 .01 ) ; A61B 2017/ 00084 (2013 .01 ) ; A61B @(71 ) Applicant : Ethicon Endo - Surgery, LLC , 2017 /00115 ( 2013 . 01 ) ; Guaynabo , PR (US ) (Continued ) @( 72 ) Inventors : Frederick E . Shelton , IV . Hillsboro . (58 ) Field of Classification Search OH (US ) ; David C . Yates, West CPC .. HO1M 10 /613 ; H01M 10 /6235 ; A61B Chester , OH (US ); Jeffrey S . Swayze, 17 /068 ; A61B 17 / 1155 West Chester, OH (US ) ; Jason L . USPC . .. .. .. .. .. .. 227 / 175 . 1 , 176 . 1 , 19 Harris , Lebanon , OH (US ) ; Andrew T . See application file for complete search history. Beckman , Cincinnati, OH (US ) (56 ) References Cited (73 ) Assignee : Ethicon Endo - Surgery , LLC , Guaynabo , PR (US ) U . S . PATENT DOCUMENTS ( * ) Notice : Subject to any disclaimer , the term of this 66 ,052 A 6 / 1867 Smith patent is extended or adjusted under 35 662 ,587 A 11 / 1900 Blake U . S . C . 154 (b ) by 388 days . (Continued ) (21 ) Appl. No. : 14/ 633 , 542 FOREIGN PATENT DOCUMENTS AU 2008207624 A1 3 /2009 ( 22 ) Filed : Feb . 27 , 2015 AU 2010214687 AL 9 / 2010 (65 ) Prior Publication Data (Continued ) US 2016 /0249908 A1 Sep . 1 , 2016 OTHER PUBLICATIONS (51 ) Int . Ci. Partial European Search Report for 16157574 . 1 , dated Jun . 3 , 2016 A61B 17 / 068 ( 2006 .01 ) ( 9 pages ) . A61B 17 / 072 ( 2006 . 01 ) (Continued ) (Continued ) (52 ) U . S . CI. Primary Examiner — Nathaniel Chukwurah CPC . -
Space Weathering on Mercury
Advances in Space Research 33 (2004) 2152–2155 www.elsevier.com/locate/asr Space weathering on Mercury S. Sasaki *, E. Kurahashi Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113 0033, Japan Received 16 January 2003; received in revised form 15 April 2003; accepted 16 April 2003 Abstract Space weathering is a process where formation of nanophase iron particles causes darkening of overall reflectance, spectral reddening, and weakening of absorption bands on atmosphereless bodies such as the moon and asteroids. Using pulse laser irra- diation, formation of nanophase iron particles by micrometeorite impact heating is simulated. Although Mercurian surface is poor in iron and rich in anorthite, microscopic process of nanophase iron particle formation can take place on Mercury. On the other hand, growth of nanophase iron particles through Ostwald ripening or repetitive dust impacts would moderate the weathering degree. Future MESSENGER and BepiColombo mission will unveil space weathering on Mercury through multispectral imaging observations. Ó 2003 COSPAR. Published by Elsevier Ltd. All rights reserved. 1. Introduction irradiation should change the optical properties of the uppermost regolith surface of atmosphereless bodies. Space weathering is a proposed process to explain Although Hapke et al. (1975) proposed that formation spectral mismatch between lunar soils and rocks, and of iron particles with sizes from a few to tens nanome- between asteroids (S-type) and ordinary chondrites. ters should be responsible for the optical property Most of lunar surface and asteroidal surface exhibit changes, impact-induced formation of glassy materials darkening of overall reflectance, spectral reddening had been considered as a primary cause for space (darkening of UV–Vis relative to IR), and weakening of weathering. -
Cover No Spine
2006 VOL 44, NO. 4 Special Issue: The Hans Christian Andersen Awards 2006 The Journal of IBBY,the International Board on Books for Young People Editors: Valerie Coghlan and Siobhán Parkinson Address for submissions and other editorial correspondence: [email protected] and [email protected] Bookbird’s editorial office is supported by the Church of Ireland College of Education, Dublin, Ireland. Editorial Review Board: Sandra Beckett (Canada), Nina Christensen (Denmark), Penni Cotton (UK), Hans-Heino Ewers (Germany), Jeffrey Garrett (USA), Elwyn Jenkins (South Africa),Ariko Kawabata (Japan), Kerry Mallan (Australia), Maria Nikolajeva (Sweden), Jean Perrot (France), Kimberley Reynolds (UK), Mary Shine Thompson (Ireland), Victor Watson (UK), Jochen Weber (Germany) Board of Bookbird, Inc.: Joan Glazer (USA), President; Ellis Vance (USA),Treasurer;Alida Cutts (USA), Secretary;Ann Lazim (UK); Elda Nogueira (Brazil) Cover image:The cover illustration is from Frau Meier, Die Amsel by Wolf Erlbruch, published by Peter Hammer Verlag,Wuppertal 1995 (see page 11) Production: Design and layout by Oldtown Design, Dublin ([email protected]) Proofread by Antoinette Walker Printed in Canada by Transcontinental Bookbird:A Journal of International Children’s Literature (ISSN 0006-7377) is a refereed journal published quarterly by IBBY,the International Board on Books for Young People, Nonnenweg 12 Postfach, CH-4003 Basel, Switzerland tel. +4161 272 29 17 fax: +4161 272 27 57 email: [email protected] <www.ibby.org>. Copyright © 2006 by Bookbird, Inc., an Indiana not-for-profit corporation. Reproduction of articles in Bookbird requires permission in writing from the editor. Items from Focus IBBY may be reprinted freely to disseminate the work of IBBY. -
Kaae, Leonard Kuuleinamoku, July 19, 2012 Leonard Kuuleinamoku Kaae, 84, of Honolulu, a Retired Hawaiian Tug & Barge Seaman and an Army Veteran, Died
Kaae, Leonard Kuuleinamoku, July 19, 2012 Leonard Kuuleinamoku Kaae, 84, of Honolulu, a retired Hawaiian Tug & Barge seaman and an Army veteran, died. He was born in Honolulu. He is survived by wife Ruth H. and sisters Ethel Hardley and Rose Giltner. Private services. [Honolulu Star-Advertiser 11 August 2012] Kaahanui, Agnes Lily Kahihiulaokalani, 77, of Honolulu, Hawaii, passed away June 14, 2012 at Kuakini Medical Center. Born July 10, 1934 in Honolulu, Hawaii. She was retired Maintenance Housekeeping Personel at Iolani Palace. She is survived by sons, Clifford Kalani (Marylyn) Kaahanui, Clyde Haumea Kaahanui, Cyrus Kamea Aloha Kaahanui, Hiromi (Jeanette) Fukuzawa; daughters, Katherine Ku’ulei Kaahanui, Kathleen Kuuipo (Arthur) Sing, Karen Kehaulani Kaahanui; 14 grandchildren; 10 great-grandchildren; sister, Rebecca Leimomi Naha. Visitation 10:00 a.m. Thursday (7/19) at Mililani Downtown Mortuary, Funeral Service 11:00 a.m., Burial 2:00 p.m. at Hawaiian Memorial Park Cemetery. Casual Attire. Flowers Welcome. [Honolulu Star-Advertiser 17 July 2012] Kaahanui, Agnes Lily Kahihiulaokalani, June 14, 2012 Agnes Lily Kahihiulaokalani Kaahanui, 77, of Honolulu, a retired Iolani Palace maintenance housekeeping worker, died in Kuakini Medical Center. She was born in Honolulu. She is survived by sons Clifford K., Clyde H. and Cyrus K. Kaahanui, and Hiromi Fukuzawa; daughters Katherine K. and Karen K. Kaahanui, and Kathleen K. Sing; sister Rebecca L. Naha; 14 grandchildren; and 10 great- grandchildren. Visitation: 10 a.m. Thursday at Mililani Downtown Mortuary. Services: 11 a.m. Burial: 2 p.m. at Hawaiian Memorial Park. Casual attire. Flowers welcome. [Honolulu Star- Advertiser 17 July 2012] Kaahanui, Carolyn Luana, July 21, 2012 Carolyn Luana Kaahanui, 59, of Kahului, a Makena Surf housekeeping department employee, died in Maui Memorial Medical Center. -
March 21–25, 2016
FORTY-SEVENTH LUNAR AND PLANETARY SCIENCE CONFERENCE PROGRAM OF TECHNICAL SESSIONS MARCH 21–25, 2016 The Woodlands Waterway Marriott Hotel and Convention Center The Woodlands, Texas INSTITUTIONAL SUPPORT Universities Space Research Association Lunar and Planetary Institute National Aeronautics and Space Administration CONFERENCE CO-CHAIRS Stephen Mackwell, Lunar and Planetary Institute Eileen Stansbery, NASA Johnson Space Center PROGRAM COMMITTEE CHAIRS David Draper, NASA Johnson Space Center Walter Kiefer, Lunar and Planetary Institute PROGRAM COMMITTEE P. Doug Archer, NASA Johnson Space Center Nicolas LeCorvec, Lunar and Planetary Institute Katherine Bermingham, University of Maryland Yo Matsubara, Smithsonian Institute Janice Bishop, SETI and NASA Ames Research Center Francis McCubbin, NASA Johnson Space Center Jeremy Boyce, University of California, Los Angeles Andrew Needham, Carnegie Institution of Washington Lisa Danielson, NASA Johnson Space Center Lan-Anh Nguyen, NASA Johnson Space Center Deepak Dhingra, University of Idaho Paul Niles, NASA Johnson Space Center Stephen Elardo, Carnegie Institution of Washington Dorothy Oehler, NASA Johnson Space Center Marc Fries, NASA Johnson Space Center D. Alex Patthoff, Jet Propulsion Laboratory Cyrena Goodrich, Lunar and Planetary Institute Elizabeth Rampe, Aerodyne Industries, Jacobs JETS at John Gruener, NASA Johnson Space Center NASA Johnson Space Center Justin Hagerty, U.S. Geological Survey Carol Raymond, Jet Propulsion Laboratory Lindsay Hays, Jet Propulsion Laboratory Paul Schenk, -
PSRD | a Cosmosparks Report
PSRD | A CosmoSparks report Quick Views of Big Advances Solar Wind Interactions with a Lunar Paleo-magnetosphere How would an ancient, global magnetic field on the Moon and its associated paleo-magnetosphere interact with the incoming, charged particles in the solar wind plasma? Would a paleo-magnetosphere shield the lunar surface from solar wind bombardment? Answering these questions improves our understanding of processes that were influenced by the Moon's paleo-magnetosphere, such as the accumulation and space weathering of volatiles in the polar regions. This is the work being undertaken by Ian Garrick-Bethell (University of California, Santa Cruz/Kyung Hee University, South Korea), Andrew Poppe (University of California, Berkeley/SSERVI NASA Ames), and Shahab Fatemi (Swedish Institute of Space Physics, Kiruna). Using computer models of the plasma environment with solar wind parameters appropriate for ~2 billion years ago, Garrick-Bethell and coauthors simulated its interaction with a lunar paleo-magnetosphere. The researchers applied Amitis, a fast, 3D computer model of plasma (kinetic ions and fluid electrons). They modeled the solar wind as H+ and used lunar surface paleo-magnetic field strengths of 0.5µT, 2µT, and 5µT (microteslas) at different orientations. (Earth, by comparison, has a surface magnetic field strength ranging from ~20 to 60µT.) Shown on the left is a 2D plot of one of the Moon-modeling results of plasma density for the case of a spin-aligned 2µT equatorial surface magnetic field strength. The magnetic dipole moment is vertical, as indicated by the small black arrow. The solar wind flows from right to left. In addition to the bow shock showing where the solar wind is diverted around the lunar magnetosphere, the modeling results clearly indicate the two polar cusps (areas of focused field lines) where solar wind plasma funnels down to the lunar surface. -
Dr. Sean P. S. Gulick Research Professor, Institute for Geophysics
Dr. Sean P. S. Gulick Research Professor, Institute for Geophysics and Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin 10100 Burnet Rd Bldg. 196 (R2200) Austin, Texas 78758-4445 Phone: 512-471-0483, Fax: 512-471-0999, E-mail: [email protected] Research Interests • Tectonic processes, tectonic-climate interactions and geohazards of convergent margins and transitional tectonic environments • Role of catastrophism in the geologic record including impact cratering, hurricanes, and tectonic events • Marine and planetary geophysical imaging at nested resolutions and ground truth through drilling, coring, logging, and sampling Employment Co-Director, Center for Planetary Systems Habitability, University of Texas at Austin Jan. 2020 – Present Research Professor, University of Texas at Austin Sept. 2015 - Present Research Associate Professor, University of Texas at Austin Jan. 2012 - Aug. 2015 Research Scientist, University of Texas Institute for Geophysics Aug. 2007 - Jan. 2012 Research Associate, University of Texas Institute for Geophysics Dec. 2001 - July 2007 Post-doctoral Fellow, University of Texas Institute for Geophysics June 1999 - Nov. 2001 Education Ph.D. in Geological Sciences, Lehigh University, Bethlehem, Pennsylvania 1999 Dissertation: “Seismic studies of the southern Cascadia subduction zone near the Mendocino triple junction,” Advisor: A. Meltzer, Committee: B. Carson, D. Anastasio, S. Clarke, Jr. (USGS), and J. Diebold (LDEO). Bachelor of Science in Geology, Minor in Marine Sciences, University of North 1993 Carolina, Chapel Hill, North Carolina, Advisor: Christine Powell. Field Experience Trinity RIver Paleochannel Project (TRIPP) Bureau of Ocean & Energy Mgmt. Aug., 2018 Chief Scientist, Gulf of Mexico, R/V Trident SISIE: South Island, New Zealand, Subduction Initiation Experiment Feb.-Mar., 2018 Co-Chief Scientist, New Zealand, R/V Marcus G. -
Geodesy, Geophysics and Fundamental Physics Investigations of the Bepicolombo Mission
Space Sci Rev (2021) 217:31 https://doi.org/10.1007/s11214-021-00808-9 Geodesy, Geophysics and Fundamental Physics Investigations of the BepiColombo Mission Antonio Genova1 · Hauke Hussmann2 · Tim Van Hoolst3,4 · Daniel Heyner5 · Luciano Iess1 · Francesco Santoli6 · Nicolas Thomas7 · Paolo Cappuccio1 · Ivan di Stefano1 · Patrick Kolhey5 · Benoit Langlais8 · Johannes Z.D. Mieth5 · Joana S. Oliveira9,10 · Alexander Stark2 · Gregor Steinbrügge11 · Nicola Tosi2 · Johannes Wicht12 · Johannes Benkhoff9 Received: 31 May 2020 / Accepted: 13 February 2021 © The Author(s) 2021 Abstract In preparation for the ESA/JAXA BepiColombo mission to Mercury, thematic working groups had been established for coordinating the activities within the BepiColombo Science Working Team in specific fields. Here we describe the scientific goals of the Geodesy and Geophysics Working Group (GGWG) that aims at addressing fundamental questions regarding Mercury’s internal structure and evolution. This multidisciplinary in- vestigation will also test the gravity laws by using the planet Mercury as a proof mass. The instruments on the Mercury Planetary Orbiter (MPO), which are devoted to accomplishing the GGWG science objectives, include the BepiColombo Laser Altimeter (BELA), the Mer- The BepiColombo mission to Mercury Edited by Johannes Benkhoff, Go Murakami and Ayako Matsuoka B A. Genova [email protected] 1 Department of Mechanical and Aerospace Engineering, Sapienza University of Rome, Via Eudossiana 18, 00184, Rome, Italy 2 DLR Institute of Planetary Research, -
An Evolving Astrobiology Glossary
Bioastronomy 2007: Molecules, Microbes, and Extraterrestrial Life ASP Conference Series, Vol. 420, 2009 K. J. Meech, J. V. Keane, M. J. Mumma, J. L. Siefert, and D. J. Werthimer, eds. An Evolving Astrobiology Glossary K. J. Meech1 and W. W. Dolci2 1Institute for Astronomy, 2680 Woodlawn Drive, Honolulu, HI 96822 2NASA Astrobiology Institute, NASA Ames Research Center, MS 247-6, Moffett Field, CA 94035 Abstract. One of the resources that evolved from the Bioastronomy 2007 meeting was an online interdisciplinary glossary of terms that might not be uni- versally familiar to researchers in all sub-disciplines feeding into astrobiology. In order to facilitate comprehension of the presentations during the meeting, a database driven web tool for online glossary definitions was developed and participants were invited to contribute prior to the meeting. The glossary was downloaded and included in the conference registration materials for use at the meeting. The glossary web tool is has now been delivered to the NASA Astro- biology Institute so that it can continue to grow as an evolving resource for the astrobiology community. 1. Introduction Interdisciplinary research does not come about simply by facilitating occasions for scientists of various disciplines to come together at meetings, or work in close proximity. Interdisciplinarity is achieved when the total of the research expe- rience is greater than the sum of its parts, when new research insights evolve because of questions that are driven by new perspectives. Interdisciplinary re- search foci often attack broad, paradigm-changing questions that can only be answered with the combined approaches from a number of disciplines.