TNOs are Cool: A Survey of the Trans-Neptunian Region I. Results from the Herschel Science Demonstration Phase (SDP)
Müller, Thomas and Lellouch, Emmanuel and Stansberry, John and Kiss, Csaba and Santos Sanz, Pablo and Vilenius, Esa and Protopapa, Silvia and Moreno, Raphael and Mueller, Michael and Delsanti, Audrey and Duffard, René D. and Fornasier, Sonia and Groussin, Olivier and Harris, Alan W. and Henry, Florence and Horner, Jonathan and Lacerda, Pedro and Lim, Tanya and Mommert, Michael and Ortiz Moreno, Jose Luis and Rengel, Miriam and Thirouin, Audrey and Trilling, David and Barucci, Antonella and Crovisier, Jacques and Doressoundiram, Alain and Dotto, Elisabetta and Gutierrez Buenestado, Pedro and Hainaut, Olivier and Hartogh, Paul and Hestroffer, Daniel and Kidger, Mark and Lara López, Luisa M. and Swinyard, Bruce and Thomas, Nicolas (2010) TNOs are Cool: A Survey of the Trans-Neptunian Region I. Results from the Herschel Science Demonstration Phase (SDP). Astronomy and Astrophysics, 518 (L146). EDP Sciences. DOI: 10.1051/0004-6361/201014683.
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The goal of the Herschel open time key programme “TNOs are Cool!” is to derive the physical and thermal properties for a large sample of Centaurs and trans-Neptunian objects (TNOs), including resonant, classical, detached and scattered disk objects. We present results for seven targets either observed in PACS point-source, or in mini scan-map mode. Spitzer-MIPS observations were included for three objects. The sizes of these targets range from 100 km to almost 1000 km, five have low geometric albedos below 10%, (145480) 2005 TB190 has a higher albedo above 15%. Classical thermal models driven by an intermediate beaming factor of η = 1.2 or η-values adjusted to the observed colour temperature fit the multi-band observations well in most cases. More sophisticated thermophysical models give very similar diameter and albedo values for thermal inertias in the range 0–25 J m-2 s-0.5 K-1, consistent with very low heat conductivities at temperatures far away from the Sun. The early experience with observing and model strategies will allow us to derive physical and thermal properties for our complete Herschel TNO sample of 140 targets as a benchmark for understanding the solar system debris disk, and extra-solar ones as well.
|Title:||TNOs are Cool: A Survey of the Trans-Neptunian Region I. Results from the Herschel Science Demonstration Phase (SDP)|
|Date:||15 May 2010|
|Journal or Publication Title:||Astronomy and Astrophysics|
|In Open Access:||No|
|In ISI Web of Science:||Yes|
|Keywords:||Kuiper belt: general / methods: observational / techniques: photometric / instrumentation: photometers / infrared: planetary systems|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W EW - Erforschung des Weltraums|
|DLR - Research area:||Space|
|DLR - Program:||W EW - Erforschung des Weltraums|
|DLR - Research theme (Project):||W - Vorhaben Asteroiden und Kometen (old)|
|Institutes and Institutions:||Institute of Planetary Research > Asteroids and Comets|
|Deposited By:||Michael Mommert|
|Deposited On:||13 Oct 2010 12:45|
|Last Modified:||20 Mar 2013 19:42|
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