期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 916, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.3847/2041-8213/ac0f05
关键词
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资金
- National Aeronautics and Space Administration [80NSSC18K0849, 80NSSC18K1004, 80HQTR19D0030]
- Korea Astronomy and Space Science Institute grant under the RD program [2020-1-600-05]
- National Research Foundation of Korea (NRF) - MSIT [2020R1A2C3011091]
- NRF [2018R1D1A1A09084105]
- JSPS KAKENHI [JP18K03723, JP19H00719, JP20K04055, JP21H01140, JP21H01148]
- Hypervelocity Impact Facility, ISAS, JAXA
- National Research Foundation of Korea [4199990114533, 2020R1A2C3011091, 2018R1D1A1A09084105] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Two extremely red main-belt asteroids, 203 Pompeja and 269 Justitia, show spectral characteristics indicating they may have originated near Neptune and were later transplanted to the main asteroid belt region, providing further evidence that the main asteroid belt hosts bodies formed in the outskirts of the Solar System.
Two extremely red main-belt asteroids, 203 Pompeja and 269 Justitia, were identified from combined visible and near-infrared spectroscopic observations collected at the Infra-red Telescope Facility (IRTF) and Seoul National University Astronomical Observatory (SAO). These two asteroids have a redder spectral slope than any other D-type body, which are the reddest objects in the asteroid belt, and similar to RR and IR-class objects found in the outer Solar System among trans-Neptunian objects (TNOs) and Centaurs. Spectroscopic results suggest the presence of complex organic materials on the surface layer of these asteroids, implying that they could have formed in the vicinity of Neptune and been transplanted to the main belt region during a phase of planetary migration. 203 Pompeja is the only very red asteroid known so far among the similar to 250 bodies with diameter larger than 110 km (i.e., presumably structurally intact) found in the asteroid belt. These discoveries provide more evidence that the main asteroid belt hosts a population of bodies that were formed in the outskirts of the Solar System.
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