Pan-starrs 1 observations of the unusual active centaur P/2011 S1(Gibbs)

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/101117

Title:	Pan-starrs 1 observations of the unusual active centaur P/2011 S1(Gibbs)
Authors:	葉永烜;Lin, H. W.;Chen, Y. T.;Lacerda, P.;Ip, W. H.;Holman, M.;Protopapas, P.;Chen, W. P.;Burgett, W. S.;Chambers, K. C.;Flewelling, H.;Huber, M. E.;Jedicke, R.;Kaiser, N.;Magnier, E. A.;Metcalfe, N.;Price, P. A.
Contributors:	理學院天文研究所
Keywords:	Active control;ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;COLOR;Comet heads;Comet nuclei;COMETS;COMPUTERIZED SIMULATION;CONTROL;CURRENTS;DEGASSING;Dwarf planets;EVOLUTION;MASS TRANSFER;Orbitals;ORBITS;Outer solar system;Outgassing;SKY;SOLAR SYSTEM;STELLAR WINDS;SURFACE AREA;SURFACES
Date:	2014-01-01
Issue Date:	2026-04-21 14:24:33 (UTC+8)
Publisher:	IOP Publishing Ltd.;United States
Abstract:	摘要： P/2011 S1 (Gibbs) is an outer solar system comet or active Centaur with a similar orbit to that of the famous 29P/Schwassmann-Wachmann 1.P/2011 S1 (Gibbs) has been observed by the Pan-STARRS 1 (PS1) sky survey from 2010 to 2012. The resulting data allow us to perform multi-color studies of the nucleus and coma of the comet. Analysis of PS1 images reveals that P/2011 S1 (Gibbs) has a small nucleus <4 km radius, with colors g sub(P1) - r sub(P1) = 0.5 + or - 0.02, r sub(P1) - i sub(P1) = 0.12 + or - 0.02, and i sub(P1) - z sub(P1) = 0.46 + or - 0.03. The comet remained active from 2010 to 2012, with a model-dependent mass-loss rate of ~100 kg s super(-1). The mass-loss rate per unit surface area of P/2011 S1 (Gibbs) is as high as that of 29P/Schwassmann-Wachmann 1, making it one of the most active Centaurs. The mass-loss rate also varies with time from ~40 kg s super(-1) to 150 kg s super(-1). Due to its rather circular orbit, we propose that P/2011 S1 (Gibbs) has 29P/Schwassmann-Wachmann 1-like outbursts that control the outgassing rate. The results indicate that it may have a similar surface composition to that of 29P/Schwassmann-Wachmann 1. Our numerical simulations show that the future orbital evolution of P/2011 S1 (Gibbs) is more similar to that of the main population of Centaurs than to that of 29P/Schwassmann-Wachmann 1. The results also demonstrate that P/2011 S1 (Gibbs) is dynamically unstable and can only remain near its current orbit for roughly a thousand years. 出版者： United States 出版日期： 2014-05-01 出處： The Astronomical journal, 2014-05, Vol.147 (5), p.114-8 資源來源： Institute of Physics Journals 識別號： ISSN: 0004-6256 識別號： ISSN: 1538-3881 識別號： EISSN: 1538-3881 識別號： DOI: 10.1088/0004-6256/147/5/114
Appears in Collections:	[Graduate Institute of Astronomy] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	19	View/Open

社群 sharing

Loading...