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The Warm Spitzer NEO Survey: Exploring the history of the inner Solar System and near Earth space

Hora, J. und Trilling, D.E. und Thomas, C.A. und Stansberry, J.A. und Spahr, T.P. und Smith, H.A. und Penprase, B.E. und Mueller, M. und Mainzer, A.K. und Harris, A.W. und Fazio, G.G. und Emery, J.P. und Delbo', M. und Chesley, S.R. und Bottke, W.F. und Bhattacharya, B. (2010) The Warm Spitzer NEO Survey: Exploring the history of the inner Solar System and near Earth space. In: Bulletin of the American Astronomical Society, 41, Seite 433. American Astronomical Society. American Astronomical Society, Meeting #215, 3-7 January 2010, Washington, DC, USA.

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Kurzfassung

The majority of Near Earth Objects (NEOs) originated in collisions between bodies in the main asteroid belt and have found their way into near Earth space via complex and little understood dynamical interactions. This transport of material from the main belt into the inner Solar System has shaped the histories of the terrestrial planets. However, despite their scientific importance, key characteristics of the NEO population --- such as the size distribution, mix of albedos and mineralogies, and contributions from so-called dead or dormant comets --- remain largely unexplored; some 99% of all presently known NEOs are essentially uncharacterized. We have an approved 500 hour Warm Spitzer program to derive albedos and diameters for some 700 NEOs. We will measure the size distribution of this population to understand fundamental physical processes that occur among the small bodies of our Solar System. We will measure the fraction of NEOs likely to be dead comets, with implications for the flux of organic material onto the Earth. We will measure the NEO albedo distribution, which indicates the compositional diversity among these small bodies. We will study properties of individual NEOs, including their surface properties and potentially their densities, and detailed properties of a subset of well-characterized objects. Our Warm Spitzer program began execution in July 2009, and will return on average one target per day for the next two years. We will present initial results from our program. This work is based on observations made with the Spitzer Space Telescope, which is operated by JPL/Caltech, under a contract with NASA. Support for this work was provided by NASA through an award issued by JPL/Caltech.

Dokumentart:Konferenzbeitrag (Vorlesung)
Titel:The Warm Spitzer NEO Survey: Exploring the history of the inner Solar System and near Earth space
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Hora, J.Harvard-Smithsonian Center for Astrophysics, USA
Trilling, D.E.Northern Arizona University, USA
Thomas, C.A.JPL/Caltech, USA
Stansberry, J.A.University of Arizona, USA
Spahr, T.P.Harvard-Smithsonian Center for Astrophysics, USA
Smith, H.A.Harvard-Smithsonian Center for Astrophysics, USA
Penprase, B.E.Pomona College, USA
Mueller, M.Observatoire de la Cote d'Azur, France
Mainzer, A.K.JPL/Caltech, USA
Harris, A.W.NICHT SPEZIFIZIERT
Fazio, G.G.Harvard-Smithsonian Center for Astrophysics, USA
Emery, J.P.University of Tennessee-Knoxville, USA
Delbo', M.Observatoire de la Cote d'Azur, France
Chesley, S.R.JPL/Caltech, USA
Bottke, W.F.SWRI, USA
Bhattacharya, B.NASA Herschel Science Center, Caltech, USA
Datum:Januar 2010
Erschienen in:Bulletin of the American Astronomical Society
Band:41
Seitenbereich:Seite 433
Verlag:American Astronomical Society
Status:veröffentlicht
Stichwörter:Asteroid, NEO, infrared photometry, Spitzer Space Telescope
Veranstaltungstitel:American Astronomical Society, Meeting #215
Veranstaltungsort:Washington, DC, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:3-7 January 2010
Veranstalter :American Astronomical Society
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EW - Erforschung des Weltraums
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Asteroiden und Kometen (alt)
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Planetenforschung > Asteroiden und Kometen
Hinterlegt von: Prof. Alan Harris
Hinterlegt am:13 Apr 2010 10:39
Letzte Änderung:13 Apr 2010 10:40

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