Discovery of main-belt comet P/2006 VW139 by Pan-STARRS1

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Title:	Discovery of main-belt comet P/2006 VW139 by Pan-STARRS1
Authors:	木下大輔;Hsieh, Henry H.;Bin, Yang;Haghighipour, Nader;Kaluna, Heather M.;Denneau, Larry;Jedicke, Robert;Wainscoat, Richard J.;Armstrong, James D.;Micheli, Marco;Keane, Jacqueline V.;Urban, Laurie;Riesen, Timm;Meech, Karen J.;Fitzsimmons, Alan;Novakovic, Bojan;Duddy, Samuel R.;Lowry, Stephen C.;Trujillo, Chadwick A.;Abe, Shinsuke;Cheng, Yu-Chi
Contributors:	理學院天文研究所
Keywords:	ASTEROIDS;ASTRONOMY;ASTROPHYSICS;ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;BRIGHTNESS;CARBON NITRIDES;COMETS;COMPUTERIZED SIMULATION;COSMIC DUST;DISTANCE;EMISSION;MORPHOLOGY;ORBITS;PHOTOMETRY;PLANETS;SUBLIMATION;TELESCOPES;VISIBLE SPECTRA;WATER
Date:	2012-03-20
Issue Date:	2026-04-21 14:12:18 (UTC+8)
Publisher:	IOP Publishing Ltd.;United States
Abstract:	摘要： The main-belt asteroid (300163) 2006 VW{sub 139} (later designated P/2006 VW{sub 139}) was discovered to exhibit comet-like activity by the Pan-STARRS1 (PS1) survey telescope using automated point-spread-function analyses performed by PS1's Moving Object Processing System. Deep follow-up observations show both a short ({approx}10'') antisolar dust tail and a longer ({approx}60'') dust trail aligned with the object's orbit plane, similar to the morphology observed for another main-belt comet (MBC), P/2010 R2 (La Sagra), and other well-established comets, implying the action of a long-lived, sublimation-driven emission event. Photometry showing the brightness of the near-nucleus coma remaining constant over {approx}30 days provides further evidence for this object's cometary nature, suggesting it is in fact an MBC, and not a disrupted asteroid. A spectroscopic search for CN emission was unsuccessful, though we find an upper limit CN production rate of Q{sub CN} < 1.3 Multiplication-Sign 10{sup 24} mol s{sup -1}, from which we infer a water production rate of Q{sub H{sub 2O}}<10{sup 26} mol s{sup -1}. We also find an approximately linear optical spectral slope of 7.2%/1000 A, similar to other cometary dust comae. Numerical simulations indicate that P/2006 VW{sub 139} is dynamically stable for >100 Myr, while a search for a potential asteroid family around the object reveals a cluster of 24 asteroids within a cutoff distance of 68 m s{sup -1}. At 70 m s{sup -1}, this cluster merges with the Themis family, suggesting that it could be similar to the Beagle family to which another MBC, 133P/Elst-Pizarro, belongs. 出版者： United States 出版日期： 2012-03-20 出處： Astrophysical journal. Letters, 2012-03, Vol.748 (1) 資源來源： Institute of Physics Journals 識別號： ISSN: 2041-8205 識別號： EISSN: 2041-8213 識別號： DOI: 10.1088/2041-8205/748/1/L15
Appears in Collections:	[Graduate Institute of Astronomy] journal & Dissertation

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