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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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Official URL: http://www.aanda.org/index.php?option=com_article&access=doi&doi=10.1051/0004-6361/201014683&Itemid=129

Abstract

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.

Document Type:Article
Title:TNOs are Cool: A Survey of the Trans-Neptunian Region I. Results from the Herschel Science Demonstration Phase (SDP)
Authors:
AuthorsInstitution or Email of Authors
Müller, ThomasMPI für Extraterrestrische Physik, Germany
Lellouch, EmmanuelObservatoire de Paris-Meudon, France
Stansberry, JohnUniversity of Arizona, USA
Kiss, CsabaKonkoly Observatory, Hungary
Santos Sanz, PabloObservatoire de Paris, France
Vilenius, EsaMPI für Extraterrestrische Physik, Germany
Protopapa, SilviaMPI für Sonnensystemforschung, Germany
Moreno, RaphaelObservatoire de Paris-Meudon, France
Mueller, MichaelObservatoire de la Côte d'Azur
Delsanti, AudreyLab. d'Astrophysique de Marseille, France
Duffard, René D.IAA-CSIC Granada, Spain
Fornasier, SoniaObservatoire de Paris-Meudon, France
Groussin, OlivierLab. d'Astrophysique de Marseille, France
Harris, Alan W.alan.harris@dlr.de
Henry, FlorenceObservatoire de Paris-Meudon, France
Horner, JonathanOpen University, Milton Keynes, UK
Lacerda, PedroQueen's University Belfast
Lim, TanyaRAL Didcot, UK
Mommert, Michaelmichael.mommert@dlr.de
Ortiz Moreno, Jose LuisIAA-CSIC Granada, Spain
Rengel, MiriamMPI für Sonnensystemforschung, Germany
Thirouin, AudreyIAA-CSIC Granada, Spain
Trilling, DavidNorthern Arizona University, USA
Barucci, AntonellaObservatoire de Paris-Meudon, France
Crovisier, JacquesObservatoire de Paris-Meudon, France
Doressoundiram, AlainObservatoire de Paris-Meudon, France
Dotto, ElisabettaOsservatorio Astronomico di Roma, Italy
Gutierrez Buenestado, PedroIAA-CSIC Granada, Spain
Hainaut, OlivierESO
Hartogh, PaulMPI für Sonnensystemforschung, Germany
Hestroffer, DanielObservatoire de Paris, France
Kidger, MarkESAC, Villafranca del Castillo, Spain
Lara López, Luisa M.IAA-CSIC Granada, Spain
Swinyard, BruceRAL Didcot, UK
Thomas, NicolasUniversity of Bern, Switzerland
Date:15 May 2010
Journal or Publication Title:Astronomy and Astrophysics
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:518
DOI:10.1051/0004-6361/201014683
Publisher:EDP Sciences
Status:Published
Keywords:Kuiper belt: general / methods: observational / techniques: photometric / instrumentation: photometers / infrared: planetary systems
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
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)
Location: Berlin-Adlershof
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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