TNOs are cool: a survey of the trans-Neptunian region: I. results from the Herschel science demonstration phase (SDP) [Letter to the editor]

Muller, T. G. and Horner, J. (2010) TNOs are cool: a survey of the trans-Neptunian region: I. results from the Herschel science demonstration phase (SDP) [Letter to the editor]. Astronomy and Astrophysics, 518 (2). L146. ISSN 0004-6361

[img]
Preview
Text (Published Version)
Muller_etal_AA_v518_PV.pdf

Download (270Kb) | Preview

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 TB190 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.
Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.


Statistics for USQ ePrint 25557
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: No
Item Status: Live Archive
Additional Information: Copyright ESO 2010. This publication is copyright. It may be reproduced in whole or in part for the purposes of study, research, or review, but is subject to the inclusion of an acknowledgment of the source.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - No Department
Date Deposited: 23 Jul 2014 04:47
Last Modified: 16 Oct 2014 05:40
Uncontrolled Keywords: Kuiper belt; observational techniques: photometric instrumentation; photometers; infrared; planetary systems
Fields of Research : 09 Engineering > 0906 Electrical and Electronic Engineering > 090606 Photonics and Electro-Optical Engineering (excl. Communications)
02 Physical Sciences > 0201 Astronomical and Space Sciences > 020102 Astronomical and Space Instrumentation
02 Physical Sciences > 0201 Astronomical and Space Sciences > 020108 Planetary Science (excl. Extraterrestrial Geology)
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1051/0004-6361/201014683
URI: http://eprints.usq.edu.au/id/eprint/25557

Actions (login required)

View Item Archive Repository Staff Only