TNOs are Cool: a survey of the Transneptunian Region XII. Thermal light curves of Haumea, 2003 VS2 and 2003 AZ84 with Herschel Space Observatory-PACS

摘要: Time series observations of the dwarf planet Haumea and Plutinos 2003VS2 2003AZ84 with Herschel/PACS are presented in this work. Thermal emission these trans-Neptunian objects were acquired as part TNOs Cool Herschel Space Observatory key programme. We search for thermal light curves at 100 160um 2003AZ84, 70 by means photometric analysis PACS data. The goal work is to use obtain physical thermophysical properties icy Solar System bodies. Haumea's curve clearly detected 160um. effect reported dark spot apparent 100um. Different models applied curves, varying surface within outside spot. Although no model gives a perfect fit observations, results imply an extremely low inertia ( 0.73) surface. note that region appears be only weakly different from rest object, modest changes and/or phase integral. not firmly but 2+/-0.5 MKS can derived apply mean fluxes all Spitzer/MIPS data obtaining close pole-on orientation most likely TNO. For three TNOs, inertias analyses or confirm generally small very TNO population, which consistent statistical value 2.5+/-0.5 MKS.