“Exozodiacal Dust Disks and Darwin”
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Refereed Publications That Name
59 Refereed Publications Since 2011 with Named Co-Authors who are NASA Citizen Scientists Compiled by Marc Kuchner February 2021 Authors in bold are citizen scientists. Aurorasaurus Semeter, J., Hunnekuhl, M., MacDonald, E., Hirsch, M., Zeller, N., Chernenkoff, A., & Wang, J. (2020). The mysterious green streaks below STEVE. AGU Advances, 1, e2020AV000183. https://doi.org/10.1029/2020AV000183 Hunnekuhl, M., & MacDonald, E. (2020). Early ground‐based work by auroral pioneer Carl Størmer on the high‐altitude detached subauroral arcs now known as “STEVE”. Space Weather, 18, e2019SW002384. https://doi.org/10.1029/2019SW002384 S. B. Mende. B. J. Harding, & C. Turner. “Subauroral Green STEVE Arcs: Evidence for Low- Energy Excitation” Geophysical Research Letters, Volume 46, Issue 24, Pages 14256-14262 (2019) http://doi.org/10.1029/2019GL086145 S. B. Mende. & C. Turner. “Color Ratios of Subauroral (STEVE) Arcs” Journal of Geophysical Research (Space Physics),Volume 124, Issue 7, Pages 5945-5955 (2019) http://doi.org/10.1029/2019JA026851 Y. Nishimura, Y., B, Gallardo-Lacourt, B., Y, Zou, E. Mishin, D.J. Knudsen, E. F. Donovan, V. Angelopoulos, R. Raybell, “Magnetospheric Signatures of STEVE: Implications for the Magnetospheric Energy Source and Interhemispheric Conjugacy” Geophysical Research Letters, Volume 46, Issue 11, Pages 5637-5644 (2019) Elizabeth A. MacDonald, Eric Donovan, Yukitoshi Nishimura, Nathan A. Case, D. Megan Gillies, Bea Gallardo-Lacourt, William E. Archer, Emma L. Spanswick, Notanee Bourassa, Martin Connors, Matthew Heavner, Brian Jackel, Burcu Kosar, David J. Knudsen, Chris Ratzlaff and Ian Schofield, “New science in plain sight: Citizen scientists lead to the discovery of optical structure in the upper atmosphere” Science Advances, vol. -
Astrophysics Division Astrophysics Douglas Hudgins Program Scientist, Exoplanet Exploration Program Key NASA/SMD Science Themes
National Aeronautics and Space Administration NASA and the Search for Life on Planets around Other Stars A presentation to the National Academies Committee on Exoplanet Science Strategy 6 March 2018 Paul Hertz Director, Astrophysics Division Astrophysics Douglas Hudgins Program Scientist, Exoplanet Exploration Program Key NASA/SMD Science Themes Protect and Improve Life on Earth Search for Life Elsewhere Discover the Secrets of the Universe 2 Talk summary 3 NASA’s Exoplanet Exploration Program Space Missions and Mission Studies Public Communications Kepler, WFIRST Decadal Studies K2 Starshade Coronagraph Supporting Research & Technology Key Sustaining Research NASA Exoplanet Science Institute Technology Development Coronagraph Masks Large Binocular Keck Single Aperture Telescope Interferometer Imaging and RV High-Contrast Deployable Archives, Tools, Sagan Fellowships, Imaging Starshades Professional Engagement NN-EXPLORE https://exoplanets.nasa.gov 4 Foundational Documents for the NASA’s Astrophysics Division 5 NASA’s cross-divisional Search for Life Elsewhere ASTROPHYSICS • Exoplanet detection and Planetary SCIENCE/ characterization ASTROBIOLOGY • Stellar characterization • Comparative planetology • Mission data analysis • Planetary atmospheres Hubble, Spitzer, Kepler, • Assessment of observable TESS, JWST, WFIRST, biosignatures etc. • Habitability EARTH SCIENCES • GCM • Planets as systems PLANETARY SCIENCE RESEARCH HELIOPHYSICS • Exoplanet characterization • Stellar characterization • Protoplanetary disks • Stellar winds • Planet formation • Detection of planetary • Comparative planetology magnetospheres 6 Exoplanet Exploration at NASA 2007 - present 7 The Spitzer Space Telescope For the last decade, the Spitzer Space Telescope has used both spectroscopic and photometric measurements in the mid-IR to probe exoplanets and exoplanetary systems. • Spitzer follow up observations of known transiting systems have revealed additional, new planets and helped refine measurements of the size and orbital dynamics of known planets as small as the Earth. -
Hubbl E Space T El Escope Wfpc2 Imaging of Fs Tauri and Haro 6-5B1 John E.Krist,2 Karl R.Stapelfeldt,3 Christopher J.Burrows,2,4 Gilda E.Ballester,5 John T
THE ASTROPHYSICAL JOURNAL, 501:841È852, 1998 July 10 ( 1998. The American Astronomical Society. All rights reserved. Printed in U.S.A. HUBBL E SPACE T EL ESCOPE WFPC2 IMAGING OF FS TAURI AND HARO 6-5B1 JOHN E.KRIST,2 KARL R.STAPELFELDT,3 CHRISTOPHER J.BURROWS,2,4 GILDA E.BALLESTER,5 JOHN T. CLARKE,5 DAVID CRISP,3 ROBIN W.EVANS,3 JOHN S.GALLAGHER III,6 RICHARD E.GRIFFITHS,7 J. JEFF HESTER,8 JOHN G.HOESSEL,6 JON A.HOLTZMAN,9 JEREMY R.MOULD,10 PAUL A. SCOWEN,8 JOHN T.TRAUGER,3 ALAN M. WATSON,11 AND JAMES A. WESTPHAL12 Received 1997 December 18; accepted 1998 February 16 ABSTRACT We have observed the Ðeld of FS Tauri (Haro 6-5) with the Wide Field Planetary Camera 2 on the Hubble Space Telescope. Centered on Haro 6-5B and adjacent to the nebulous binary system of FS Tauri A there is an extended complex of reÑection nebulosity that includes a di†use, hourglass-shaped structure. H6-5B, the source of a bipolar jet, is not directly visible but appears to illuminate a compact, bipolar nebula which we assume to be a protostellar disk similar to HH 30. The bipolar jet appears twisted, which explains the unusually broad width measured in ground-based images. We present the Ðrst resolved photometry of the FS Tau A components at visual wavelengths. The Ñuxes of the fainter, eastern component are well matched by a 3360 K blackbody with an extinction ofAV \ 8. For the western star, however, any reasonable, reddened blackbody energy distribution underestimates the K-band photometry by over 2 mag. -
2008 Smithsonian Folklife Festival
Smithsonian Folklife Festival records: 2008 Smithsonian Folklife Festival CFCH Staff 2017 Ralph Rinzler Folklife Archives and Collections Smithsonian Center for Folklife and Cultural Heritage 600 Maryland Ave SW Washington, D.C. [email protected] https://www.folklife.si.edu/archive/ Table of Contents Collection Overview ........................................................................................................ 1 Administrative Information .............................................................................................. 1 Historical note.................................................................................................................. 2 Scope and Contents note................................................................................................ 2 Arrangement note............................................................................................................ 2 Introduction....................................................................................................................... 3 Names and Subjects ...................................................................................................... 4 Container Listing ............................................................................................................. 6 Series 1: Program Books, Festival Publications, and Ephemera, 2008................... 6 Series 2: Bhutan: Land of the Thunder Dragon....................................................... 7 Series 3: NASA: Fifty Years and Beyond............................................................. -
Exep Science Plan Appendix (SPA) (This Document)
ExEP Science Plan, Rev A JPL D: 1735632 Release Date: February 15, 2019 Page 1 of 61 Created By: David A. Breda Date Program TDEM System Engineer Exoplanet Exploration Program NASA/Jet Propulsion Laboratory California Institute of Technology Dr. Nick Siegler Date Program Chief Technologist Exoplanet Exploration Program NASA/Jet Propulsion Laboratory California Institute of Technology Concurred By: Dr. Gary Blackwood Date Program Manager Exoplanet Exploration Program NASA/Jet Propulsion Laboratory California Institute of Technology EXOPDr.LANET Douglas Hudgins E XPLORATION PROGRAMDate Program Scientist Exoplanet Exploration Program ScienceScience Plan Mission DirectorateAppendix NASA Headquarters Karl Stapelfeldt, Program Chief Scientist Eric Mamajek, Deputy Program Chief Scientist Exoplanet Exploration Program JPL CL#19-0790 JPL Document No: 1735632 ExEP Science Plan, Rev A JPL D: 1735632 Release Date: February 15, 2019 Page 2 of 61 Approved by: Dr. Gary Blackwood Date Program Manager, Exoplanet Exploration Program Office NASA/Jet Propulsion Laboratory Dr. Douglas Hudgins Date Program Scientist Exoplanet Exploration Program Science Mission Directorate NASA Headquarters Created by: Dr. Karl Stapelfeldt Chief Program Scientist Exoplanet Exploration Program Office NASA/Jet Propulsion Laboratory California Institute of Technology Dr. Eric Mamajek Deputy Program Chief Scientist Exoplanet Exploration Program Office NASA/Jet Propulsion Laboratory California Institute of Technology This research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. © 2018 California Institute of Technology. Government sponsorship acknowledged. Exoplanet Exploration Program JPL CL#19-0790 ExEP Science Plan, Rev A JPL D: 1735632 Release Date: February 15, 2019 Page 3 of 61 Table of Contents 1. -
Lunar and Planetary Information Bulletin No. 161 (July 2020)
THE DEEP SPACE NETWORK: NASA’s Link to the Solar System Featured Story | From the Desk of Lori Glaze | Meeting Highlights | News from Space | Spotlight on Education In Memoriam | Milestones | New and Noteworthy | Calendar LUNAR AND PLANETARY INFORMATION BULLETIN July 2020 Issue 161 FEATURED STORY THE DEEP SPACE NETWORK: NASA’s Link to the Solar System Note from the Editors: This issue’s lead article is the tenth in a series of reports describing the history and current activities of the planetary research facilities funded by NASA and located nationwide. This issue features the Deep Space Network, a worldwide network of spacecraft communication facilities that supports NASA’s interplanetary spacecraft missions. — Paul Schenk and Renée Dotson From Mercury to Pluto (and beyond) we tary robotic space missions. Other space system and ultimately, our place within it. have marveled at the stunning vistas agencies, such as Europe’s ESA and found throughout our solar system. Japan’s JAXA also use the DSN by coop- The forerunner of the DSN was estab- From the erupting volcanos on Io to the erative agreements. The DSN consists of lished in January, 1958, when the Jet glorious rings of Saturn, it is easy to three major facilities spaced equidistant Propulsion Laboratory, or JPL‚ then forget that we would never have an about from each other‚ approximately 120 under contract to the U.S. Army‚ degrees apart in longitude‚ around the deployed portable radio tracking stations but for one key global NASA facility, none world. These sites are at Goldstone, near in Nigeria, Singapore, and California. -
Overview and Reassessment of Noise Budget of Starshade Exoplanet Imaging
Overview and reassessment of noise budget of starshade exoplanet imaging a,b, a a a Renyu Hu , * Doug Lisman, Stuart Shaklan , Stefan Martin , a a Phil Willems , and Kendra Short aJet Propulsion Laboratory, California Institute of Technology, Pasadena, California, United States bCalifornia Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, California, United States Abstract. High-contrast imaging enabled by a starshade in formation flight with a space telescope can provide a near-term pathway to search for and characterize temperate and small planets of nearby stars. NASA’s Starshade Technology Development Activity to TRL5 (S5) is rapidly maturing the required technologies to the point at which starshades could be integrated into potential future missions. We reappraise the noise budget of starshade-enabled exoplanet imaging to incorporate the experimentally demonstrated optical performance of the starshade and its optical edge. Our analyses of stray light sources—including the leakage through micro- — meteoroid damage and the reflection of bright celestial bodies indicate that sunlight scattered by the optical edge (i.e., the solar glint) is by far the dominant stray light. With telescope and observation parameters that approximately correspond to Starshade Rendezvous with Roman and Habitable Exoplanet Observatory (HabEx), we find that the dominating noise source is exo- zodiacal light for characterizing a temperate and Earth-sized planet around Sun-like and earlier stars and the solar glint for later-type stars. Further, reducing the brightness of solar glint by a factor of 10 with a coating would prevent it from becoming the dominant noise for both Roman −10 and HabEx. -
Astronomy Astrophysics
A&A 453, 101–119 (2006) Astronomy DOI: 10.1051/0004-6361:20053894 & c ESO 2006 Astrophysics On the difference between nuclear and contraction ages, W. Lyra1,2,3,A.Moitinho4,N.S.vanderBliek1,andJ.Alves5 1 Cerro Tololo Interamerican Observatory, Casilla 603 La Serena, Chile 2 Observatório do Valongo/UFRJ, Ladeira do Pedro Antônio 43, 20080-090 Rio de Janeiro, Brazil 3 Department of Astronomy and Space Physics, Uppsala Astronomical Observatory, Box 515, 751 20 Uppsala, Sweden e-mail: [email protected] 4 Observatório Astronómico de Lisboa, Tapada da Ajuda, 1349-018 Lisbon, Portugal 5 European Southern Observatory, Karl-Schwarzschild 2, 85748 Garching, Germany Received 23 July 2005 / Accepted 20 February 2006 ABSTRACT Context. Ages derived from low mass stars still contracting onto the main sequence often differ from ages derived from the high mass ones that have already evolved away from it. Aims. We investigate the general claim of disagreement between these two independent age determinations by presenting UBVRI pho- tometry for the young galactic open clusters NGC 2232, NGC 2516, NGC 2547 and NGC 4755, spanning the age range ∼10–150 Myr Methods. We derived reddenings, distances, and nuclear ages by fitting ZAMS and isochrones to color–magnitudes and color–color di- agrams. To derive contraction ages, we used four different pre-main sequence models, with an empirically calibrated color-temperature relation to match the Pleiades cluster sequence. Results. When exclusively using the V vs. V − I color–magnitude diagram and empirically calibrated isochrones, there is consistency between nuclear and contraction ages for the studied clusters. -
Paul Hertz NASA Town Hall with Bonus Material
Paul Hertz Dominic Benford Felicia Chou Valerie Connaughton Lucien Cox Jeanne Davis Kristen Erickson Daniel Evans Michael Garcia Ellen Gertsen Shahid Habib Hashima Hasan Douglas Hudgins Patricia Knezek Elizabeth Landau William Latter Michael New Mario Perez Gregory Robinson Rita Sambruna Evan Scannapieco Kartik Sheth Eric Smith Eric Tollestrup NASA Town Hall with bonus material AAS 235th Meeting | January 5, 2020 Paul Hertz Director, Astrophysics Division Science Mission Directorate @PHertzNASA Posted at http://science.nasa.gov/astrophysics/documents 1 2 Spitzer 8/25/2003 Formulation + SMEX/MO (2025), Implementation MIDEX/MO (2028), etc. Primary Ops ] Extended Ops SXG (RSA) 7/13/2019 Webb Euclid (ESA) 2021 WFIRST 2022 Mid 2020s Ariel (ESA) 2028 XMM-Newton Chandra (ESA) TESS 7/23/1999 12/10/1999 4/18/2018 NuSTAR 6/13/2012 Fermi IXPE Swift 6/11/2008 2021 11/20/2004 XRISM (JAXA) SPHEREx 2022 2023 Hubble ISS-NICER GUSTO 4/24/1990 6/3/2017 2021 SOFIA Full Ops 5/2014 + Athena (early 2030s), Revised November 24, 2019 LISA4 (early 2030s) Outline • Celebrate Accomplishments § Mission Milestones • Committed to Improving § Building an Excellent Workforce § Research and Analysis Initiatives • Program Update § Research & Analysis, Technology, Fellowships § ROSES-2020 Preview • Missions Update § Operating Missions and Senior Review § Webb, WFIRST § Other missions • Planning for the Future § FY20 Budget § Project Artemis § Supporting Astro2020 § Creating the Future 5 NASA Astrophysics Celebrate Accomplishments https://www.nasa.gov/2019 7 NASA Astrophysics -
Issue 105, February 2006
GGOINGOING TOTO PPLUTOLUTO:: TTHEHE NNEWEW HHORIZONSORIZONS MMISSIONISSION — Paul Schenk, Lunar and Planetary Institute Fastest man-made object to leave Earth. Fastest flight past the Moon’s orbit. It was a day of superlatives, but it didn’t come easy for those watching. Going back to 1992, there have been at least three attempts to begin building a spacecraft to go to Pluto, the “last” unexplored planet. Only in 2001 was a team and mission chosen that would finally make it past the hurdles of Congress, the Office of Management and Budget (OMB), and NASA management. Once the process finally began, it took only five years from the call for mission proposals to launch day. Once on the launch pad, things went relatively smoothly until launch day itself, originally set for January 10 but then pushed back until January 17. Although involved with NASA for more than 20 years now, I had never personally witnessed a launch. We arrived at Kennedy Space Center early on the 17th, as directed, and waited outside to the music of 2001 — A Space Odyssey and a recording of the voice of Neil Armstrong walking on the Moon. We met many of our friends from the team, and together we boarded the fleet of buses to the viewing area. It was warm but windy, a bad omen. The launch window was only three hours long and peak winds kept exceeding the tolerable limits for launch. Every 15 minutes or so the launch commentator announced that the launch time was being pushed back again in hopes the winds would subside. -
High-Resolution Optical and Near-Infrared Imaging of Young Circumstellar Disks
HIGH-RESOLUTION OPTICAL AND NEAR-INFRARED IMAGING OF YOUNG CIRCUMSTELLAR DISKS MARK McCAUGHREAN Astrophysikalisches Institut Potsdam KARL STAPELFELDT Jet Propulsion Laboratory, California Institute of Technology and LAIRD CLOSE Institute for Astronomy, University of Hawaii In the past five years, observations at optical and near-infrared wavelengths obtained with the Hubble Space Telescope and ground-based adaptive op- tics have provided the first well-resolved images of young circumstellar disks which may form planetary systems. We review these two observational tech- niques and highlight their results by presenting prototype examples of disks imaged in the Taurns-Auriga and Orion star-forming regions. As appropri- ate, we discuss the disk parameters that may be typically derived from the observations, as well as the implications that the observations may have on our understanding of, for example, the role of the ambient environment in shaping the disk evolution. We end with a brief summary of the prospects for future improvements in space- and ground-based optical/IR imaging tech- niques, and how they may impact disk studies. I. DIRECT IMAGING OF CIRCUMSTELLAR DISKS The Copernican demotion of humankind away from the center of our local planetary system also provided the shift in perspective re- quired to understand its cosmogony. Once it was apparent that the solar system comprised a number of planets in essentially circular and coplanar orbits around the Sun, theories for its formation were devel- oped involving condensation from a rotating disk-shaped primordial nebula, or Urnebel. The so-called "Kant-Laplace nebular hypothesis" eventually held sway in the latter half of the twentieth century af- ter lengthy competition with rival "catastrophic" theories (see Koerner 1997 for a review), and was subsequently vindicated by the discovery of analogues to the Urnebel around young stars elsewhere in the galaxy. -
WIS-2015-07-Radioastronomie ALMA Teil4.Pdf (Application/Pdf 4.0
Das Projekt ALMA Mater* Teil 4: Eine Beobachtung, die es in sich hat: eine „Kinderstube“ für Planeten *Wir verwenden die Bezeichnung Alma Mater als Synonym für eine Universität. Seinen Ursprung hat das Doppelwort im Lateinischen (alma: nähren, mater: Mutter). Im übertragenen Sinne ernährt die (mütterliche) Universität ihre Studenten mit Wissen. Und weiter gesponnen ernährt das Projekt ALMA auch die Schüler und Studenten mit Anreizen für das Lernen. (Zudem bedeutet das spanische Wort ‚Alma‘: Seele.) In Bezug (Materie bei T-Tauri-Sternen) zum Beitrag „Der Staubring von GG Tauri“ von Wolfgang Brandner in der Zeitschrift „Sterne und Weltraum“ (SuW) 7/2015, S.30/31, WIS-ID: 1285836 Olaf Fischer Im folgenden WIS-Beitrag steht ein atemberaubendes Beobachtungsergebnis von ALMA im Brennpunkt – die detaillierte Abbildung einer protoplanetaren Scheibe um einen entstehenden Stern – die potentielle Geburtsstätte für Planeten. Neben Beschreibungen und Erklärungen werden vor allem verschiedenartige Aktivitäten (Rechnungen zur Ma und Ph, Arbeit mit Karten, Bildauswertung, Diagramminterpretation, Papiermodell, Quartett) für Schüler angeboten, um diese Beobachtung und damit im Zusammenhang stehende Inhalte (insbesondere die Sternentstehung) besser zu verstehen, auch indem diese den Nutzen des Schulwissen entdecken. Der Wert von Kenntnissen auf verschiedenen Gebieten (Sprache, Mathematik, Naturwis- senschaft, Technik) wird spürbar. Der Beitrag eignet sich als Grundlage für Schülervorträge, die Arbeit in einer AG, wie auch für den Fachunterricht in der Oberstufe.