"TNOs are Cool": A survey of the trans-Neptunian region IV. Size/albedo characterization of 15 scattered disk and detached objects observed with Herschel-PACS

被引：81

作者：

Santos-Sanz, P. ^{[1
]}

Lellouch, E. ^{[1
]}

Fornasier, S. ^{[1
,2
]}

Kiss, C. ^{[3
]}

Pal, A. ^{[3
]}

Mueller, T. G. ^{[4
]}

Vilenius, E. ^{[4
]}

Stansberry, J. ^{[5
]}

Mommert, M. ^{[6
]}

Delsanti, A. ^{[1
,7
,8
]}

Mueller, M. ^{[9
,10
]}

Peixinho, N. ^{[11
,12
]}

Henry, F. ^{[1
]}

Ortiz, J. L. ^{[13
]}

Thirouin, A. ^{[13
]}

Protopapa, S. ^{[14
]}

Duffard, R. ^{[13
]}

Szalai, N. ^{[3
]}

Lim, T. ^{[15
]}

Ejeta, C. ^{[16
]}

Hartogh, P. ^{[16
]}

Harris, A. W. ^{[6
]}

Rengel, M. ^{[16
]}

机构：

[1] Univ Paris Diderot, UPMC Univ Paris 6, CNRS, LESIA Observ Paris, F-92195 Meudon, France

[2] Univ Paris Diderot, Sorbonne Paris Cite, F-75205 Paris, France

[3] Hungarian Acad Sci, Konkoly Observ, Budapest, Hungary

[4] Max Planck Inst Extraterr Phys MPE, Garching, Germany

[5] Univ Arizona, Tucson, AZ USA

[6] Deutsch Zentrum Luft & Raumfahrt DLR, Inst Planetary Res, Berlin, Germany

[7] Univ Aix Marseille 1, Marseille, France

[8] CNRS, Lab Astrophys Marseille, Marseille, France

[9] Univ Groningen, SRON LEA HIFI ICC, NL-9700 AV Groningen, Netherlands

[10] UNS CNRS Observ Cote Azur, Lab Cassiopee, F-06304 Nice 04, France

[11] Univ Coimbra, Ctr Geophys, P-3000134 Coimbra, Portugal

[12] Univ Coimbra, Astron Observ, P-3040004 Coimbra, Portugal

[13] Inst Astrofis Andalucia CSIC, Granada, Spain

[14] Univ Maryland, College Pk, MD 20742 USA

[15] Rutherford Appleton Lab, Space Sci & Technol Dept, Didcot OX11 0QX, Oxon, England

[16] Max Planck Inst Sonnensyst Forsch MPS, Katlenburg Lindau, Germany

来源：

ASTRONOMY & ASTROPHYSICS | 2012年 / 541卷

关键词：

Kuiper belt: general; infrared: planetary systems; methods: observational; techniques: photometric; KUIPER-BELT OBJECTS; MULTIBAND IMAGING PHOTOMETER; ESO LARGE PROGRAM; TERM ROTATIONAL VARIABILITY; OUTER SOLAR-SYSTEM; DWARF PLANET ERIS; ABSOLUTE CALIBRATION; MU-M; SPECTROPHOTOMETRIC OBSERVATIONS; PHYSICAL-CHARACTERIZATION;

D O I：

10.1051/0004-6361/201118541

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. Physical characterization of trans-Neptunian objects, a primitive population of the outer solar system, may provide constraints on their formation and evolution. Aims. The goal of this work is to characterize a set of 15 scattered disk (SDOs) and detached objects, in terms of their size, albedo, and thermal properties. Methods. Thermal flux measurements obtained with the Herschel-PACS instrument at 70, 100 and 160 mu m, and whenever applicable, with Spitzer-MIPS at 24 and 70 mu m, are modeled with radiometric techniques, in order to derive the objects' individual size, albedo and when possible beaming factor. Error bars are obtained from a Monte-Carlo approach. We look for correlations between these and other physical and orbital parameters. Results. Diameters obtained for our sample range from 100 to 2400 km, and the geometric albedos (in V band) vary from 3.8% to 84.5%. The unweighted mean V geometric albedo for the whole sample is 11.2% (excluding Eris); 6.9% for the SDOs, and 17.0% for the detached objects (excluding Eris). We obtain new bulk densities for three binary systems: Ceto/Phorcys, Typhon/Echidna and Eris/Dysnomia. Apart from correlations clearly due to observational bias, we find significant correlations between albedo and diameter (more reflective objects being bigger), and between albedo, diameter and perihelion distance (brighter and bigger objects having larger perihelia). We discuss possible explanations for these correlations.

引用

页数：18

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