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A close-in massive planet efficiently suppresses white dwarf atmospheric pollution by gravitationally scattering or ejecting inward-migrating asteroidal bodies before they reach the tidal disruption (Roche) limit
11email: jwxie@nju.edu.cn 22institutetext: Key Laboratory of Modern Astronomy and Astrophysics, Ministry of Education, Nanjing 210023, PR China 33institutetext: School of Physics and Astronomy, Sun Yat-sen University, DaXue Road 2, 519082, Zhuhai, China How a Close-in Planet Protects its White Dwarf Host from Pollution Abstract Context. Approximately 25–50% of white dwarfs (WDs) exhibit metal absorption lines in their photospheres, which are attributed to accretion from their remnant planetary systems.
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