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Discovery of a Low-Α, R-Process-Enhanced Metal-Poor Star in the Galactic Halo
The Astrophysical Journal, 874:148 (13pp), 2019 April 1 https://doi.org/10.3847/1538-4357/ab0c02 © 2019. The American Astronomical Society. All rights reserved. The R-Process Alliance: Discovery of a Low-α, r-process-enhanced Metal-poor Star in the Galactic Halo Charli M. Sakari1 , Ian U. Roederer2,3 , Vinicius M. Placco3,4 , Timothy C. Beers3,4 , Rana Ezzeddine3,5 , Anna Frebel3,5 , Terese Hansen6 , Christopher Sneden7 , John J. Cowan8, George Wallerstein1, Elizabeth M. Farrell1, Kim A. Venn9 , Gal Matijevič10, Rosemary F. G. Wyse11, Joss Bland-Hawthorn12,13 , Cristina Chiappini10, Kenneth C. Freeman14 , Brad K. Gibson15 , Eva K. Grebel16, Amina Helmi17 , Georges Kordopatis18 , Andrea Kunder19 , Julio Navarro9, Warren Reid20,21, George Seabroke22, Matthias Steinmetz10 , and Fred Watson23 1 Department of Astronomy, University of Washington, Seattle WA 98195-1580, USA; [email protected] 2 Department of Astronomy, University of Michigan, 1085 S. University Ave., Ann Arbor, MI 48109, USA 3 Joint Institute for Nuclear Astrophysics Center for the Evolution of the Elements (JINA-CEE), USA 4 Department of Physics, University of Notre Dame, Notre Dame, IN 46556, USA 5 Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA 6 Mitchell Institute for Fundamental Physics and Astronomy and Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843- 4242, USA 7 Department of Astronomy and McDonald Observatory, The University of Texas, -
Discovery of a Low-, R-Process-Enhanced Metal-Poor Star in the Galactic Halo
The R -Process Alliance: Discovery of a Low- # , r - process-enhanced Metal-poor Star in the Galactic Halo The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Citation Sakari, Charli M. et al. “The R -Process Alliance: Discovery of a Low- α , r -process-enhanced Metal-poor Star in the Galactic Halo.” Astrophysical Journal, 874, 2 (April 2019): 148 © 2019 The Author(s) As Published 10.3847/1538-4357/AB0C02 Publisher American Astronomical Society Version Final published version Citable link https://hdl.handle.net/1721.1/128687 Terms of Use Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The Astrophysical Journal, 874:148 (13pp), 2019 April 1 https://doi.org/10.3847/1538-4357/ab0c02 © 2019. The American Astronomical Society. All rights reserved. The R-Process Alliance: Discovery of a Low-α, r-process-enhanced Metal-poor Star in the Galactic Halo Charli M. Sakari1 , Ian U. Roederer2,3 , Vinicius M. Placco3,4 , Timothy C. Beers3,4 , Rana Ezzeddine3,5 , Anna Frebel3,5 , Terese Hansen6 , Christopher Sneden7 , John J. Cowan8, George Wallerstein1, Elizabeth M. Farrell1, Kim A. Venn9 , Gal Matijevič10, Rosemary F. G. Wyse11, Joss Bland-Hawthorn12,13 , Cristina Chiappini10, Kenneth C. Freeman14 , Brad K. Gibson15 , Eva K. Grebel16, Amina Helmi17 , Georges Kordopatis18 , Andrea Kunder19 , Julio Navarro9, Warren Reid20,21, George Seabroke22, Matthias Steinmetz10 , and Fred Watson23 1 Department of Astronomy, University of Washington, Seattle WA 98195-1580, USA; [email protected] 2 Department of Astronomy, University of Michigan, 1085 S. -
CURRICULUM VITAE Timothy C
CURRICULUM VITAE Timothy C. Beers Date of Birth: June 24, 1957 Place of Birth: Lafayette, Indiana Nationality: US Employment Status: Notre Dame Chair of Galactic Archaeology, University of Notre Dame Current Address: Department of Physics, University of Notre Dame 225 Nieuwland Science Hall Notre Dame, IN, 46556 Current Phone: (574) 631-4088 (Office) (520) 909-3318 (Cell) Education Harvard University Ph.D. in Astronomy, November 1983 Thesis: "Dynamical Studies of Clusters of Galaxies" Advisor: Margaret J. Geller A.M. in Astronomy, November 1980 Purdue University B.S. in Physics, Summa Cum Laude, June 1979 B.S. in Metallurgical Engineering, Summa Cum Laude, June 1979 Professional Societies, Honors, and Awards Notre Dame Chair of Galactic Archaeology 2014, Notre Dame Humboldt Senior Research Award 2009, Humboldt Foundation (Germany) ISI Highly-Cited Author 2009, ISI University Distinguished Professor 2007, MSU University Distinguished Faculty Award 2006, MSU College of Natural Science Distinguished Faculty Award 2006, MSU Outreach Award Dept. of Physics/Astronomy 2006, MSU Scientist of the Year 2003, Impressions 5 Museum, Lansing, Michigan International Astronomical Union, Commissions 29 and 30 American Astronomical Society American Physical Society Bantrell Post-Doctoral Research Fellow (Caltech) Hughes Aircraft Company Masters Fellow (Harvard) Argonne National Lab Summer Research Fellow (Purdue) Frank Gannett Undergraduate Fellow (Purdue) Sigma Xi -- Science Honorary (Purdue) Sigma Pi Sigma -- Physics Honorary (Purdue) Tau Beta Pi -- -
The Archaeology of the Stars by CURTIS BRAINARDFEB
SPACE & COSMOS The Archaeology of the Stars By CURTIS BRAINARDFEB. 10, 2014 A drawing of the Giant Magellan Telescope, which will be set up in the Atacama Desert in Chile and allow an even deeper look into the early universe. Todd Mason/Giant Magellan Telescope Organization Four years ago, Anna Frebel, a young astronomer at the Massachusetts Institute of Technology, found an ancient star in a neighboring galaxy whose chemical composition proved nearly identical to some unusual stars on the outskirts of our own galaxy, which are older than the Milky Way itself. It was a striking discovery, suggesting that the relatively young Milky Way is growing by conquest — “cannibalizing” nearby older dwarf galaxies. And it underscored the importance of a new way of learning how the universe evolved from the Big Bang to the modern cosmos. Traditionally, astronomers study the early universe by looking back in time — peering deeper and deeper into space for vestiges of light from billions of years ago. But in the last decade, Dr. Frebel and others have used powerful telescopes and high-resolution spectroscopes to study the chemical composition of very old stars closer to home, in the Milky Way’s halo, producing a wealth of information about the creation of elements and the formation of the first stars and galaxies. Anna Frebel, of M.I.T., uses powerful telescopes and high-resolution spectroscopes to study stars’ chemical composition. These astronomers are like Egyptologists combing the desert for relics of bygone civilizations, and call themselves stellar archaeologists. Their work relies on the fact that the rare, primordial stars they are looking for have very few atoms heavier than hydrogen and helium, the gases from which they came together. -
Metal-Poor Stars and the Chemical Enrichment of the Universe Observations, Stellar Abundances, and Chemical Evolution
Metal-poor stars and the chemical enrichment of the universe Anna Frebel Observations, stellar abundances, and chemical evolution Prof. Anna Frebel Massachusetts Institute of Technology (MIT) & chemical enrichment Observations, abundances Observations, abundances 1 Bio sketch • 1999-2002: BSc equivalent in physics (Freiburg, Germany) Anna Frebel • 2002-2003: Work experience at Mt. Stromlo Observatory (Canberra, Australia) • 2003-2006: PhD at Australian National University (Canberra, Australia) • 2006-2008: McDonald Postdoctoral Fellow (Univ. of Texas, Austin) • 2009-2011: Clay Postdoctoral Fellow (Harvard-Smithsonian CfA) • 2012-now: Assistant Professor of Physics (MIT, USA) • Feel free to ask questions! • Available at NIC school: only Monday and Tuesday! & chemical enrichment at the 6.5m Magellan Telescope in Chile Observations, abundances Observations, abundances 2 Research interests Stellar archaeology: Near-field cosmology: Anna Frebel • The most metal-poor stars, • The first stars, • chemical evolution of the Milky • early star and galaxy Way and dwarf galaxies, formation, • stellar kinematics and galactic • galaxy assembly on structure, small scales, • supernova nucleosynthesis and • dwarf galaxies, neutron-capture processes, • the formation of the • nuclear astrophysics, Galactic halo • stellar evolution, (theoretically + observationally), • stellar abundances, • the age of the Universe. • spectroscopic observations and & chemical enrichment analyses. Observations, abundances Observations, abundances 3 Freely available at http://arxiv.org/abs/1102.1748 -
Fellows' Projects 2020/2021
ARBEITSVORHABEN DER FELLOWS FELLOWS ’ P R O J E CT S 2020/2021 Herausgeber: Wissenschaftskolleg zu Berlin Wallotstraße 19 14193 Berlin Tel.: +49 30 89001-0 Fax: +49 30 89001-300 [email protected] www.wiko-berlin.de Redaktion: Maike Voltmer Redaktionsschluss: 17. Juli 2020 Dieses Werk ist lizenziert unter einer Creative Commons Namensnennung – Nicht kommerziell – Keine Bearbeitung 3.0 Deutschland Lizenz I NHALT VORWORT ______________________________ 4 PREFACE _______________________________ 5 ANNA LISA AHLERS _______________________ 6 MARCELO ADRIÁN AIZ EN __________________ 8 NADINE AMSLER ________________________ 10 MINOU ARJOMAND ______________________ 12 KATYA ASSAF - ZAKHAROV ________________ 14 MADELEINE BEEKMAN ___________________ 16 SOPHIE BERNARD _______________________ 18 ALEXANDER BEVILACQUA ________________ 20 JOHANNES BÖH ME ______________________ 22 MICHAEL CANT _________________________ 24 HAKAN CEYLAN ________________________ 26 ÈVE CHIAPELLO ________________________ 28 A N G E L A N . H . CREAGER __________________ 30 TATENDA DALU ________________________ 32 LORRAINE DASTON ______________________ 34 ANDREAS DORSCHEL _____________________ 36 SONJA DÜMPELMANN ____________________ 38 DIETER EBERT __________________________ 40 M E R V E E M R E ___________________________ 42 ANNA FREBEL __________________________ 44 CHRISTEL FRICKE _______________________ 46 RAGHAVENDRA GADAGK AR _______________ 48 LUCA GIULIANI _________________________ 50 TONI GOSSMANN ________________________ 52 DIETER GRIMM _________________________ 54 -
First Release from the Northern Search for R-Process-Enhanced Metal-Poor Stars in the Galactic Halo
University of Groningen The R-Process Alliance Sakari, Charli M.; Placco, Vinicius M.; Farrell, Elizabeth M.; Roederer, Ian U.; Wallerstein, George; Beers, Timothy C.; Ezzeddine, Rana; Frebel, Anna; Hansen, Terese; Holmbeck, Erika M. Published in: The Astrophysical Journal DOI: 10.3847/1538-4357/aae9df IMPORTANT NOTE: You are advised to consult the publisher's version (publisher's PDF) if you wish to cite from it. Please check the document version below. Document Version Publisher's PDF, also known as Version of record Publication date: 2018 Link to publication in University of Groningen/UMCG research database Citation for published version (APA): Sakari, C. M., Placco, V. M., Farrell, E. M., Roederer, I. U., Wallerstein, G., Beers, T. C., ... Watson, F. (2018). The R-Process Alliance: First Release from the Northern Search for r-process-enhanced Metal- poor Stars in the Galactic Halo. The Astrophysical Journal, 868(2), [110]. https://doi.org/10.3847/1538- 4357/aae9df Copyright Other than for strictly personal use, it is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license (like Creative Commons). Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. -
First Release from the Northern Search for R-Process-Enhanced Metal-Poor Stars in the Galactic Halo
The Astrophysical Journal, 868:110 (25pp), 2018 December 1 https://doi.org/10.3847/1538-4357/aae9df © 2018. The American Astronomical Society. All rights reserved. The R-Process Alliance: First Release from the Northern Search for r-process-enhanced Metal-poor Stars in the Galactic Halo Charli M. Sakari1 , Vinicius M. Placco2,3 , Elizabeth M. Farrell1, Ian U. Roederer3,4 , George Wallerstein1, Timothy C. Beers2,3 , Rana Ezzeddine5 , Anna Frebel5 , Terese Hansen6 , Erika M. Holmbeck2,3 , Christopher Sneden7 , John J. Cowan8, Kim A. Venn9 , Christopher Evan Davis1, Gal Matijevič10, Rosemary F. G. Wyse11, Joss Bland-Hawthorn12,13 , Cristina Chiappini14, Kenneth C. Freeman15 , Brad K. Gibson16 , Eva K. Grebel17, Amina Helmi18 , Georges Kordopatis19 , Andrea Kunder20 , Julio Navarro9, Warren Reid21,22, George Seabroke23, Matthias Steinmetz10 , and Fred Watson24 1 Department of Astronomy, University of Washington, Seattle, WA 98195-1580, USA; [email protected] 2 Department of Physics, University of Notre Dame, Notre Dame, IN 46556, USA 3 Joint Institute for Nuclear Astrophysics Center for the Evolution of the Elements (JINA-CEE), USA 4 Department of Astronomy, University of Michigan, 1085 S. University Avenue, Ann Arbor, MI 48109, USA 5 Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA 6 Observatories of the Carnegie Institution of Washington, 813 Santa Barbara Street, Pasadena, CA 91101, USA 7 Department of Astronomy and McDonald Observatory, -
First Release from the Northern Search for R-Process-Enhanced Metal-Poor Stars in the Galactic Halo
The Astrophysical Journal, 868:110 (25pp), 2018 December 1 https://doi.org/10.3847/1538-4357/aae9df © 2018. The American Astronomical Society. All rights reserved. The R-Process Alliance: First Release from the Northern Search for r-process-enhanced Metal-poor Stars in the Galactic Halo Charli M. Sakari1 , Vinicius M. Placco2,3 , Elizabeth M. Farrell1, Ian U. Roederer3,4 , George Wallerstein1, Timothy C. Beers2,3 , Rana Ezzeddine5 , Anna Frebel5 , Terese Hansen6 , Erika M. Holmbeck2,3 , Christopher Sneden7 , John J. Cowan8, Kim A. Venn9 , Christopher Evan Davis1, Gal Matijevič10, Rosemary F. G. Wyse11, Joss Bland-Hawthorn12,13 , Cristina Chiappini14, Kenneth C. Freeman15 , Brad K. Gibson16 , Eva K. Grebel17, Amina Helmi18 , Georges Kordopatis19 , Andrea Kunder20 , Julio Navarro9, Warren Reid21,22, George Seabroke23, Matthias Steinmetz10 , and Fred Watson24 1 Department of Astronomy, University of Washington, Seattle, WA 98195-1580, USA; [email protected] 2 Department of Physics, University of Notre Dame, Notre Dame, IN 46556, USA 3 Joint Institute for Nuclear Astrophysics Center for the Evolution of the Elements (JINA-CEE), USA 4 Department of Astronomy, University of Michigan, 1085 S. University Avenue, Ann Arbor, MI 48109, USA 5 Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA 6 Observatories of the Carnegie Institution of Washington, 813 Santa Barbara Street, Pasadena, CA 91101, USA 7 Department of Astronomy and McDonald Observatory,