Published 2010
| Version v1
Journal article
``TNOs are cool'': A survey of the trans-Neptunian region. II. The thermal lightcurve of (136108) Haumea
Creators
- Lellouch, Emmanuel
- Kiss, Csaba
- Santos-Sanz, Pablo
- Müller, Thomas G.
- Fornasier, Sonia
- Groussin, Olivier
- Lacerda, Pedro
- Ortiz, José Luiz
- Thirouin, Audrey
- Delsanti, Audrey
- Duffard, René
- Harris, Alan W.
- Henry, Florence
- Lim, Tanya L.
- Moreno, Raphaël
- Mommert, Michael
- Mueller, Michael
- Protopapa, Silvia
- Stansberry, John A.
- Trilling, David E.
- Vilenius, Esa
- Barucci, Maria Antonella
- Crovisier, Jacques
- Doressoundiram, Alain
- Dotto, Elisabetta
- Gutierrez, Pedro J.
- Hainaut, Olivier
- Hartogh, Paul
- Hestroffer, Daniel
- Horner, Jonathan
- Jorda, Laurent
- Kidger, Mark R.
- Lara, Luisa M.
- Rengel, Miriam
- Swinyard, Bruce
- Thomas, Nicholas
Contributors
Others:
- Observatoire de Paris ; Université Paris sciences et lettres (PSL)
- Konkoly Observatory, Research Center for Astronomy and Earth Sciences
- Max-Planck-Institut für Extraterrestriche Physik (MPE)
- Université Sorbonne Paris Cité (USPC)
- Laboratoire d'Astrophysique de Marseille (LAM) ; Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)
- Royal Society, Astrophysics Research Centre, Physics Building, Queen's University, Belfast, County Antrim
- Instituto de Astrofisica de Andalucia, CSIC (IAA)
- Deutsches Zentrum für Luft- und Raumfahrt (DLR)
- Space Science and Technology Department, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, Oxon UK
- Observatoire de la Côte d'Azur (OCA) ; Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
- Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau (MPS)
- Steward Observatory, University of Arizona
- Department of Physics and Astronomy, Northern Arizona University, Flagstaff
- INAF-Osservatorio Astronomico di Roma (INAF-OAR)
- European Southern Observatory (ESO)
- Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE) ; Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)
- Groupe Astrométrie et Planétologie (GAP) ; Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE) ; Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)
- Department of Physics and Astronomy, Durham University
- European Space Astronomy Centre (ESAC) ; European Space Agency (ESA)
- University of Bern (UBERN)
Description
Thermal emission from Kuiper belt object (136108) Haumea was measured with Herschel-PACS at 100 mum and 160 mum for almost a full rotation period. Observations clearly indicate a 100 mum 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 mum 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 mum 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.
Abstract
International audienceAdditional details
Identifiers
- URL
- https://hal.archives-ouvertes.fr/hal-03785677
- URN
- urn:oai:HAL:hal-03785677v1