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

Abstract

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.

Item URL in elib:

https://elib.dlr.de/65101/

Document Type:

Article

Title:

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

Authors:

Authors	Institution or Email of Authors	Author's ORCID iD	ORCID Put Code
Lellouch, Emmanuel	Observatoire de Paris-Meudon, France	UNSPECIFIED	UNSPECIFIED
Kiss, Csaba	Konkoly Observatory, Hungary	UNSPECIFIED	UNSPECIFIED
Santos Sanz, Pablo	Observatoire de Paris, France	UNSPECIFIED	UNSPECIFIED
Müller, Thomas	MPI für Extraterrestrische Physik, Germany	UNSPECIFIED	UNSPECIFIED
Fornasier, Sonia	Observatoire de Paris-Meudon, France	UNSPECIFIED	UNSPECIFIED
Groussin, Olivier	Lab. d'Astrophysique de Marseille, France	UNSPECIFIED	UNSPECIFIED
Lacerda, Pedro	Queen's University Belfast	UNSPECIFIED	UNSPECIFIED
Ortiz Moreno, Jose Luis	IAA-CSIC Granada, Spain	UNSPECIFIED	UNSPECIFIED
Thirouin, Audrey	IAA-CSIC Granada, Spain	UNSPECIFIED	UNSPECIFIED
Delsanti, Audrey	Lab. d'Astrophysique de Marseille, France	UNSPECIFIED	UNSPECIFIED
Duffard, René D.	IAA-CSIC Granada, Spain	UNSPECIFIED	UNSPECIFIED
Harris, Alan W.	UNSPECIFIED	https://orcid.org/0000-0001-8548-8268	UNSPECIFIED
Henry, Florence	Observatoire de Paris-Meudon, France	UNSPECIFIED	UNSPECIFIED
Lim, Tanya	RAL Didcot, UK	UNSPECIFIED	UNSPECIFIED
Moreno, Raphael	Observatoire de Paris-Meudon, France	UNSPECIFIED	UNSPECIFIED
Mommert, Michael	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Mueller, Michael	Observatoire de la Côte d'Azur	UNSPECIFIED	UNSPECIFIED
Protopapa, Silvia	MPI für Sonnensystemforschung, Germany	UNSPECIFIED	UNSPECIFIED
Stansberry, John	University of Arizona, USA	UNSPECIFIED	UNSPECIFIED
Trilling, David	Northern Arizona University, USA	UNSPECIFIED	UNSPECIFIED
Vilenius, Esa	MPI für Extraterrestrische Physik, Germany	UNSPECIFIED	UNSPECIFIED
Barucci, Antonella	Observatoire de Paris-Meudon, France	UNSPECIFIED	UNSPECIFIED
Crovisier, Jacques	Observatoire de Paris-Meudon, France	UNSPECIFIED	UNSPECIFIED
Doressoundiram, Alain	Observatoire de Paris-Meudon, France	UNSPECIFIED	UNSPECIFIED
Dotto, Elisabetta	Osservatorio Astronomico di Roma, Italy	UNSPECIFIED	UNSPECIFIED
Gutierrez Buenestado, Pedro	IAA-CSIC Granada, Spain	UNSPECIFIED	UNSPECIFIED
Hainaut, Olivier	ESO	UNSPECIFIED	UNSPECIFIED
Hartogh, Paul	MPI für Sonnensystemforschung, Germany	UNSPECIFIED	UNSPECIFIED
Hestroffer, Daniel	Observatoire de Paris, France	UNSPECIFIED	UNSPECIFIED
Horner, Jonathan	Open University, Milton Keynes, UK	UNSPECIFIED	UNSPECIFIED
Jorda, Laurent	Lab. d'Astrophysique de Marseille, France	UNSPECIFIED	UNSPECIFIED
Kidger, Mark	ESAC, Villafranca del Castillo, Spain	UNSPECIFIED	UNSPECIFIED
Lara López, Luisa M.	IAA-CSIC Granada, Spain	UNSPECIFIED	UNSPECIFIED
Rengel, Miriam	MPI für Sonnensystemforschung, Germany	UNSPECIFIED	UNSPECIFIED
Swinyard, Bruce	RAL Didcot, UK	UNSPECIFIED	UNSPECIFIED
Thomas, Nicolas	University of Bern, Switzerland	UNSPECIFIED	UNSPECIFIED

Date:

11 May 2010

Journal or Publication Title:

Astronomy and Astrophysics

Refereed publication:

Yes

Open Access:

Gold Open Access:

In SCOPUS:

Yes

In ISI Web of Science:

Yes

Volume:

518

DOI:

10.1051/0004-6361/201014648

Publisher:

EDP Sciences

Status:

Published

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:

24 Apr 2024 19:30

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