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| HAL: hal-00690785, version 1 |
| arXiv: 1204.0697 |
| ADS Bibliographic id: 2012arXiv1204.0697V |
| Detailed view |  Export this paper |
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| "TNOs are Cool": A survey of the trans-Neptunian region VI. Herschel/PACS observations and thermal modeling of 19 classical Kuiper belt objects |
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| Esa Vilenius 1Csaba Kiss 2 |
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| (2012-04-03) |
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| Trans-Neptunian objects (TNO) represent the leftovers of the formation of the Solar System. Their physical properties provide constraints to the models of formation and evolution of the various dynamical classes of objects in the outer Solar System. Based on a sample of 19 classical TNOs we determine radiometric sizes, geometric albedos and beaming parameters. Our sample is composed of both dynamically hot and cold classicals. We study the correlations of diameter and albedo of these two subsamples with each other and with orbital parameters, spectral slopes and colors. We have done three-band photometric observations with Herschel/PACS and we use a consistent method for data reduction and aperture photometry of this sample to obtain monochromatic flux densities at 70.0, 100.0 and 160.0 \mu m. Additionally, we use Spitzer/MIPS flux densities at 23.68 and 71.42 \mu m when available, and we present new Spitzer flux densities of eight targets. We derive diameters and albedos with the near-Earth asteroid thermal model (NEATM). As auxiliary data we use reexamined absolute visual magnitudes from the literature and data bases, part of which have been obtained by ground based programs in support of our Herschel key program. We have determined for the first time radiometric sizes and albedos of eight classical TNOs, and refined previous size and albedo estimates or limits of 11 other classicals. The new size estimates of 2002 MS4 and 120347 Salacia indicate that they are among the 10 largest TNOs known. Our new results confirm the recent findings that there are very diverse albedos among the classical TNOs and that cold classicals possess a high average albedo (0.17 +/- 0.04). Diameters of classical TNOs strongly correlate with orbital inclination in our sample. We also determine the bulk densities of six binary TNOs. |
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| 1: | Max-Planck-Institut für extraterrestrische Physik (MPE) |
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Max-Planck-Institut |
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| 2: | Konkoly Observatory |
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Hungarian Academy of Sciences |
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| 3: | German Aerospace Center (DLR) |
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Deutsches Zentrum für Luft- und Raumfahrt (DLR) |
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| 4: | Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA) |
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CNRS : UMR8109 – INSU – Observatoire de Paris – Université Pierre et Marie Curie [UPMC] - Paris VI – Université Paris VII - Paris Diderot |
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| 5: | Steward observatory |
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University of Arizona |
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| 6: | Institute for Space Research Netherlands (SRON) |
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SRON Netherlands Institute for Space Research |
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| 7: | Laboratoire de Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides (CASSIOPEE) |
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Université Nice Sophia Antipolis [UNS] – CNRS : UMR6202 – Observatoire de la Côte d'Azur – INSU |
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| 8: | Center for Geophysics |
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University of Coimbra |
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| 9: | Astronomical observatory |
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University of Coimbra |
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| 10: | Laboratoire d'Astrophysique de Marseille (LAM) |
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CNRS : UMR7326 – INSU – Aix-Marseille Université - AMU |
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| 11: | Instituto de Astrofisica de Andalucia (IAA-CSIC) |
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Instituto de Astrofísica de Andalucía |
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| 12: | Osservatorio astronomico di Capodimonte |
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INAF |
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| 13: | INAF Osservatorio Astronomico di Roma |
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INAF |
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| 14: | Department of Astronomy |
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University of Maryland |
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| 15: | Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE) |
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CNRS : UMR8028 – INSU – Observatoire de Paris – Université Pierre et Marie Curie [UPMC] - Paris VI – Université Lille I - Sciences et technologies |
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| 16: | Max-Planck-Institut für Sonnensystemforschung |
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Max-Planck-Institut für sonnensystemforschung |
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| Subject | : | Physics/Astrophysics/Earth and Planetary Astrophysics Sciences of the Universe/Astrophysics/Earth and Planetary Astrophysics |
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| Astrophysics – Earth and Planetary Astrophysics |
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| Fulltext link: |
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| http://fr.arXiv.org/abs/1204.0697 |
| hal-00690785, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00690785 | |
| oai:hal.archives-ouvertes.fr:hal-00690785 | |
| From: Daniel Hestroffer | |
| Submitted on: Tuesday, 24 April 2012 14:17:19 | |
| Updated on: Tuesday, 24 April 2012 14:17:19 | |
