“TNOs are Cool”: A survey of the trans-Neptunian ...
Document type :
Article dans une revue scientifique
Title :
“TNOs are Cool”: A survey of the trans-Neptunian region VII. Size and surface characteristics of (90377) Sedna and 2010 EK139
Author(s) :
Pal, A. [Auteur]
Kiss, C. [Auteur]
Mueller, T. G. [Auteur]
Santos-Sanz, P. [Auteur]
Laboratoire d'études spatiales et d'instrumentation en astrophysique [LESIA]
Vilenius, E. [Auteur]
Max-Planck-Institut für Extraterrestrische Physik [MPE]
Szalai, N. [Auteur]
Mommert, M. [Auteur]
DLR Institute of Planetary Research
Lellouch, E. [Auteur]
Laboratoire d'études spatiales et d'instrumentation en astrophysique [LESIA]
Rengel, M. [Auteur]
Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research [MPS]
Hartogh, P. [Auteur]
Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research [MPS]
Protopapa, S. [Auteur]
Stansberry, J. [Auteur]
Lunar and Planetary Laboratory [Tucson] [LPL]
Ortiz, J. -L. [Auteur]
Duffard, R. [Auteur]
Instituto de Astrofísica de Andalucía [IAA]
Thirouin, A. [Auteur]
Instituto de Astrofísica de Andalucía [IAA]
Henry, F. [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Delsanti, A. [Auteur]
Laboratoire d'Astrophysique de Marseille [LAM]
Kiss, C. [Auteur]
Mueller, T. G. [Auteur]
Santos-Sanz, P. [Auteur]
Laboratoire d'études spatiales et d'instrumentation en astrophysique [LESIA]
Vilenius, E. [Auteur]
Max-Planck-Institut für Extraterrestrische Physik [MPE]
Szalai, N. [Auteur]
Mommert, M. [Auteur]
DLR Institute of Planetary Research
Lellouch, E. [Auteur]
Laboratoire d'études spatiales et d'instrumentation en astrophysique [LESIA]
Rengel, M. [Auteur]
Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research [MPS]
Hartogh, P. [Auteur]
Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research [MPS]
Protopapa, S. [Auteur]
Stansberry, J. [Auteur]
Lunar and Planetary Laboratory [Tucson] [LPL]
Ortiz, J. -L. [Auteur]
Duffard, R. [Auteur]
Instituto de Astrofísica de Andalucía [IAA]
Thirouin, A. [Auteur]
Instituto de Astrofísica de Andalucía [IAA]
Henry, F. [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Delsanti, A. [Auteur]
Laboratoire d'Astrophysique de Marseille [LAM]
Journal title :
Astronomy and Astrophysics - A&A
Publisher :
EDP Sciences
Publication date :
2012-05
ISSN :
0004-6361
HAL domain(s) :
Planète et Univers [physics]/Astrophysique [astro-ph]
English abstract : [en]
We present estimates of the basic physical properties (size and albedo) of (90377) Sedna, a prominent member of the detached trans-Neptunian object population and the recently discovered scattered disk object 2010 EK139, ...
Show more >We present estimates of the basic physical properties (size and albedo) of (90377) Sedna, a prominent member of the detached trans-Neptunian object population and the recently discovered scattered disk object 2010 EK139, based on the recent observations acquired with the Herschel Space Observatory, within the “TNOs are Cool!” key programme. Our modeling of the thermal measurements shows that both objects have larger albedos and smaller sizes than the previous expectations, thus their surfaces might be covered by ices in a significantly larger fraction. The derived diameter of Sedna and 2010 EK139 are 995 +/- 80 km and 470(-10)(+35) km, while the respective geometric albedos are p(V) = 0.32 +/- 0.06 and 0.25(-0.05)(+0.02). These estimates are based on thermophysical model techniques.Show less >
Show more >We present estimates of the basic physical properties (size and albedo) of (90377) Sedna, a prominent member of the detached trans-Neptunian object population and the recently discovered scattered disk object 2010 EK139, based on the recent observations acquired with the Herschel Space Observatory, within the “TNOs are Cool!” key programme. Our modeling of the thermal measurements shows that both objects have larger albedos and smaller sizes than the previous expectations, thus their surfaces might be covered by ices in a significantly larger fraction. The derived diameter of Sedna and 2010 EK139 are 995 +/- 80 km and 470(-10)(+35) km, while the respective geometric albedos are p(V) = 0.32 +/- 0.06 and 0.25(-0.05)(+0.02). These estimates are based on thermophysical model techniques.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Source :
Files
- http://arxiv.org/pdf/1204.0899
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- Access the document
- 1204.0899
- Open access
- Access the document