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TNOs are Cool: A Survey of the Trans-Neptunian Region II. The thermal lightcurve of (136108) Haumea

Lellouch, Emmanuel and Kiss, Csaba and Santos Sanz, Pablo and Müller, Thomas and Fornasier, Sonia and Groussin, Olivier and Lacerda, Pedro and Ortiz Moreno, Jose Luis and Thirouin, Audrey and Delsanti, Audrey and Duffard, René D. and Harris, Alan W. and Henry, Florence and Lim, Tanya and Moreno, Raphael and Mommert, Michael and Mueller, Michael and Protopapa, Silvia and Stansberry, John and Trilling, David and Vilenius, Esa 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 Horner, Jonathan and Jorda, Laurent and Kidger, Mark and Lara López, Luisa M. and Rengel, Miriam and Swinyard, Bruce and Thomas, Nicolas (2010) TNOs are Cool: A Survey of the Trans-Neptunian Region II. The thermal lightcurve of (136108) Haumea. Astronomy and Astrophysics, 518 (L147). EDP Sciences. DOI: 10.1051/0004-6361/201014648.

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Official URL: http://www.aanda.org/index.php?option=com_article&access=doi&doi=10.1051/0004-6361/201014648&Itemid=129


Thermal emission from Kuiper belt object (136108) Haumea was measured with Herschel–PACS at 100 μm and 160 μm for almost a full rotation period. Observations clearly indicate a 100 μm thermal lightcurve with an amplitude of a factor of ~2, which is positively correlated with the optical lightcurve. This confirms that both are primarily due to shape effects. A 160 μm lightcurve is marginally detected. Radiometric fits of the mean Herschel- and Spitzer- fluxes indicate an equivalent diameter D ~ 1300 km and a geometric albedo pv ~ 0.70–0.75. These values agree with inferences from the optical lightcurve, supporting the hydrostatic equilibrium hypothesis. The large amplitude of the 100 μm lightcurve suggests that the object has a high projected a/b axis ratio (~1.3) and a low thermal inertia as well as possible variable infrared beaming. This may point to fine regolith on the surface, with a lunar-type photometric behavior. The quality of the thermal data is not sufficient to clearly detect the effects of a surface dark spot.

Document Type:Article
Title:TNOs are Cool: A Survey of the Trans-Neptunian Region II. The thermal lightcurve of (136108) Haumea
AuthorsInstitution or Email of AuthorsAuthors ORCID
Lellouch, EmmanuelObservatoire de Paris-Meudon, FranceUNSPECIFIED
Kiss, CsabaKonkoly Observatory, HungaryUNSPECIFIED
Santos Sanz, PabloObservatoire de Paris, FranceUNSPECIFIED
Müller, ThomasMPI für Extraterrestrische Physik, GermanyUNSPECIFIED
Fornasier, SoniaObservatoire de Paris-Meudon, FranceUNSPECIFIED
Groussin, OlivierLab. d'Astrophysique de Marseille, FranceUNSPECIFIED
Lacerda, PedroQueen's University BelfastUNSPECIFIED
Ortiz Moreno, Jose LuisIAA-CSIC Granada, SpainUNSPECIFIED
Thirouin, AudreyIAA-CSIC Granada, SpainUNSPECIFIED
Delsanti, AudreyLab. d'Astrophysique de Marseille, FranceUNSPECIFIED
Duffard, René D.IAA-CSIC Granada, SpainUNSPECIFIED
Harris, Alan W.alan.harris@dlr.deUNSPECIFIED
Henry, FlorenceObservatoire de Paris-Meudon, FranceUNSPECIFIED
Moreno, RaphaelObservatoire de Paris-Meudon, FranceUNSPECIFIED
Mommert, Michaelmichael.mommert@dlr.deUNSPECIFIED
Mueller, MichaelObservatoire de la Côte d'AzurUNSPECIFIED
Protopapa, SilviaMPI für Sonnensystemforschung, GermanyUNSPECIFIED
Stansberry, JohnUniversity of Arizona, USAUNSPECIFIED
Trilling, DavidNorthern Arizona University, USAUNSPECIFIED
Vilenius, EsaMPI für Extraterrestrische Physik, GermanyUNSPECIFIED
Barucci, AntonellaObservatoire de Paris-Meudon, FranceUNSPECIFIED
Crovisier, JacquesObservatoire de Paris-Meudon, FranceUNSPECIFIED
Doressoundiram, AlainObservatoire de Paris-Meudon, FranceUNSPECIFIED
Dotto, ElisabettaOsservatorio Astronomico di Roma, ItalyUNSPECIFIED
Gutierrez Buenestado, PedroIAA-CSIC Granada, SpainUNSPECIFIED
Hartogh, PaulMPI für Sonnensystemforschung, GermanyUNSPECIFIED
Hestroffer, DanielObservatoire de Paris, FranceUNSPECIFIED
Horner, JonathanOpen University, Milton Keynes, UKUNSPECIFIED
Jorda, LaurentLab. d'Astrophysique de Marseille, FranceUNSPECIFIED
Kidger, MarkESAC, Villafranca del Castillo, SpainUNSPECIFIED
Lara López, Luisa M.IAA-CSIC Granada, SpainUNSPECIFIED
Rengel, MiriamMPI für Sonnensystemforschung, GermanyUNSPECIFIED
Swinyard, BruceRAL Didcot, UKUNSPECIFIED
Thomas, NicolasUniversity of Bern, SwitzerlandUNSPECIFIED
Date:11 May 2010
Journal or Publication Title:Astronomy and Astrophysics
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Publisher:EDP Sciences
Keywords:Kuiper belt objects: individual: (136108) Haumea / techniques: photometric
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: Mommert, Michael
Deposited On:13 Oct 2010 12:41
Last Modified:19 Jul 2016 17:28

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