"TNOs are Cool": A survey of the trans-Neptunian region: I. Results from the Herschel science demonstration phase (SDP)

T. G. Müller, E. Lellouch, J. Stansberry, C. Kiss, P. Santos-Sanz, E. Vilenius, S. Protopapa, R. Moreno, M. Mueller, A. Delsanti, R. Duffard, S. Fornasier, O. Groussin, A. W. Harris, F. Henry, J. Horner, P. Lacerda, T. Lim, M. Mommert, J. L. OrtizM. Rengel, A. Thirouin, David E Trilling, A. Barucci, J. Crovisier, A. Doressoundiram, E. Dotto, P. J. Gutiérrez, O. R. Hainaut, P. Hartogh, D. Hestroffer, M. Kidger, L. Lara, B. Swinyard, N. Thomas

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The goal of the Herschel open time key programme "TNOs are Cool!" is to derive the physical and thermal properties for a large sample of Centaurs and trans-Neptunian objects (TNOs), including resonant, classical, detached and scattered disk objects. We present results for seven targets either observed in PACS point-source, or in mini scan-map mode. Spitzer-MIPS observations were included for three objects. The sizes of these targets range from 100 km to almost 1000 km, five have low geometric albedos below 10%, (145480) 2005 TB 190 has a higher albedo above 15%. Classical thermal models driven by an intermediate beaming factor of η = 1.2 or η-values adjusted to the observed colour temperature fit the multi-band observations well in most cases. More sophisticated thermophysical models give very similar diameter and albedo values for thermal inertias in the range 0-25 J m-2 s-0.5 K-1, consistent with very low heat conductivities at temperatures far away from the Sun. The early experience with observing and model strategies will allow us to derive physical and thermal properties for our complete Herschel TNO sample of 140 targets as a benchmark for understanding the solar system debris disk, and extra-solar ones as well.

Original languageEnglish (US)
JournalAstronomy and Astrophysics
Volume518
Issue number2
DOIs
StatePublished - Jul 16 2010

Fingerprint

trans-Neptunian objects
albedo
thermodynamic properties
physical properties
debris
inertia
solar system
point sources
point source
conductivity
temperature
color
well
heat
science

Keywords

  • Infrared: planetary systems
  • Instrumentation: photometers
  • Kuiper belt: general
  • Methods: observational
  • Techniques: photometric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

"TNOs are Cool" : A survey of the trans-Neptunian region: I. Results from the Herschel science demonstration phase (SDP). / Müller, T. G.; Lellouch, E.; Stansberry, J.; Kiss, C.; Santos-Sanz, P.; Vilenius, E.; Protopapa, S.; Moreno, R.; Mueller, M.; Delsanti, A.; Duffard, R.; Fornasier, S.; Groussin, O.; Harris, A. W.; Henry, F.; Horner, J.; Lacerda, P.; Lim, T.; Mommert, M.; Ortiz, J. L.; Rengel, M.; Thirouin, A.; Trilling, David E; Barucci, A.; Crovisier, J.; Doressoundiram, A.; Dotto, E.; Gutiérrez, P. J.; Hainaut, O. R.; Hartogh, P.; Hestroffer, D.; Kidger, M.; Lara, L.; Swinyard, B.; Thomas, N.

In: Astronomy and Astrophysics, Vol. 518, No. 2, 16.07.2010.

Research output: Contribution to journalArticle

Müller, TG, Lellouch, E, Stansberry, J, Kiss, C, Santos-Sanz, P, Vilenius, E, Protopapa, S, Moreno, R, Mueller, M, Delsanti, A, Duffard, R, Fornasier, S, Groussin, O, Harris, AW, Henry, F, Horner, J, Lacerda, P, Lim, T, Mommert, M, Ortiz, JL, Rengel, M, Thirouin, A, Trilling, DE, Barucci, A, Crovisier, J, Doressoundiram, A, Dotto, E, Gutiérrez, PJ, Hainaut, OR, Hartogh, P, Hestroffer, D, Kidger, M, Lara, L, Swinyard, B & Thomas, N 2010, '"TNOs are Cool": A survey of the trans-Neptunian region: I. Results from the Herschel science demonstration phase (SDP)', Astronomy and Astrophysics, vol. 518, no. 2. https://doi.org/10.1051/0004-6361/201014683
Müller, T. G. ; Lellouch, E. ; Stansberry, J. ; Kiss, C. ; Santos-Sanz, P. ; Vilenius, E. ; Protopapa, S. ; Moreno, R. ; Mueller, M. ; Delsanti, A. ; Duffard, R. ; Fornasier, S. ; Groussin, O. ; Harris, A. W. ; Henry, F. ; Horner, J. ; Lacerda, P. ; Lim, T. ; Mommert, M. ; Ortiz, J. L. ; Rengel, M. ; Thirouin, A. ; Trilling, David E ; Barucci, A. ; Crovisier, J. ; Doressoundiram, A. ; Dotto, E. ; Gutiérrez, P. J. ; Hainaut, O. R. ; Hartogh, P. ; Hestroffer, D. ; Kidger, M. ; Lara, L. ; Swinyard, B. ; Thomas, N. / "TNOs are Cool" : A survey of the trans-Neptunian region: I. Results from the Herschel science demonstration phase (SDP). In: Astronomy and Astrophysics. 2010 ; Vol. 518, No. 2.
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AU - Santos-Sanz, P.

AU - Vilenius, E.

AU - Protopapa, S.

AU - Moreno, R.

AU - Mueller, M.

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AU - Thomas, N.

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