Details

Autor(en) / Beteiligte

• Westphal, Andrew J.
• Anderson, David
• Butterworth, Anna L.
• Frank, David R.
• Lettieri, Robert
• Marchant, William
• Von Korff, Joshua
• Zevin, Daniel
• Ardizzone, Augusto
• Campanile, Antonella
• Capraro, Michael
• Courtney, Kevin
• Criswell III, Mitchell N.
• Crumpler, Dixon
• Cwik, Robert
• Gray, Fred Jacob
• Hudson, Bruce
• Imada, Guy
• Karr, Joel
• Wah, Lily Lau Wan
• Mazzucato, Michele
• Motta, Pier Giorgio
• Rigamonti, Carlo
• Spencer, Ronald C.
• Woodrough, Stephens B.
• Santoni, Irene Cimmino
• Sperry, Gerry
• Terry, Jean-Noel
• Wordsworth, Naomi
• Yahnke Sr, Tom
• Allen, Carlton
• Ansari, Asna
• Bajt, Saša
• Bastien, Ron K.
• Bassim, Nabil
• Bechtel, Hans A.
• Borg, Janet
• Brenker, Frank E.
• Bridges, John
• Brownlee, Donald E.
• Burchell, Mark
• Burghammer, Manfred
• Changela, Hitesh
• Cloetens, Peter
• Davis, Andrew M.
• Doll, Ryan
• Floss, Christine
• Flynn, George
• Gainsforth, Zack
• Grün, Eberhard
• Heck, Philipp R.
• Hillier, Jon K.
• Hoppe, Peter
• Huth, Joachim
• Hvide, Brit
• Kearsley, Anton
• King, Ashley J.
• Lai, Barry
• Leitner, Jan
• Lemelle, Laurence
• Leroux, Hugues
• Leonard, Ariel
• Nittler, Larry R.
• Ogliore, Ryan
• Ong, Wei Ja
• Postberg, Frank
• Price, Mark C.
• Sandford, Scott A.
• Tresseras, Juan-Angel Sans
• Schmitz, Sylvia
• Schoonjans, Tom
• Silversmit, Geert
• Simionovici, Alexandre S.
• Solé, Vicente A.
• Srama, Ralf
• Stephan, Thomas
• Sterken, Veerle J.
• Stodolna, Julien
• Stroud, Rhonda M.
• Sutton, Steven
• Trieloff, Mario
• Tsou, Peter
• Tsuchiyama, Akira
• Tyliszczak, Tolek
• Vekemans, Bart
• Vincze, Laszlo
• Zolensky, Michael E.

Titel

Stardust Interstellar Preliminary Examination I: Identification of tracks in aerogel

Ist Teil von

• Meteoritics & planetary science, 2014-09, Vol.49 (9), p.1509-1521

Ort / Verlag

Blackwell Publishing Ltd

Erscheinungsjahr

2014

Quelle

Wiley Online Library - AutoHoldings Journals

Beschreibungen/Notizen

• Here, we report the identification of 69 tracks in approximately 250 cm2 of aerogel collectors of the Stardust Interstellar Dust Collector. We identified these tracks through Stardust@home, a distributed internet‐based virtual microscope and search engine, in which > 30,000 amateur scientists collectively performed >9 × 107 searches on approximately 106 fields of view. Using calibration images, we measured individual detection efficiency, and found that the individual detection efficiency for tracks > 2.5 μm in diameter was >0.6, and was >0.75 for tracks >3 μm in diameter. Because most fields of view were searched >30 times, these results could be combined to yield a theoretical detection efficiency near unity. The initial expectation was that interstellar dust would be captured at very high speed. The actual tracks discovered in the Stardust collector, however, were due to low‐speed impacts, and were morphologically strongly distinct from the calibration images. As a result, the detection efficiency of these tracks was lower than detection efficiency of calibrations presented in training, testing, and ongoing calibration. Nevertheless, as calibration images based on low‐speed impacts were added later in the project, detection efficiencies for low‐speed tracks rose dramatically. We conclude that a massively distributed, calibrated search, with amateur collaborators, is an effective approach to the challenging problem of identification of tracks of hypervelocity projectiles captured in aerogel.