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| 題名: | Discovery of main-belt comet P/2006 VW139 by Pan-STARRS1 |
| 作者: | 陳文屏;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 |
| 貢獻者: | 理學院天文研究所 |
| 關鍵詞: | 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 |
| 日期: | 2012-03-20 |
| 上傳時間: | 2026-04-21 14:12:26 (UTC+8) |
| 出版者: | IOP Publishing Ltd.;United States |
| 摘要: | 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 |
| 顯示於類別: | [天文研究所] 期刊論文
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