Planet Destruction Rate of Occurrence and Observability: Has Planet Accretion Been Recently Found?

Details Planet Destruction Rate of Occurrence and Observability: Has Planet Accretion Been Recently Found? Planet Destruction Rate of Occurrence and Observability: Has Planet Accretion Been Recently Found?

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ess.....2.3607t&link_type=abstract

American Astronomical Society, ESS meeting #2, #36.07

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Scientific paper

Planet accretion and destruction will release more energy and material than any other planet-related event. When it happens fast enough, the release of matter and energy can produce stronger observational signals than any other planet-related event. But Roche lobe overflow can lead to outward migration that prolong Roche lobe overflow for so long that perhaps only the matter release might be an observable indicator of planet accretion. We present some plausible lifetimes of this overflow phase that support the interpretation of Spezzi et al. (2011) who suggest that “planet ingestion” may explain their finding of nine high luminosity/low temperature objects. We suggest that the planets may not have quickly released most of their material. Our results indicate that the overflowing planets may still be present, and still undergoing overflow. The length of time of the overflow phase depends on several factors, including the tidal quality factor (the rate of tidal friction), and what fraction of the angular momentum goes into the orbit versus spinning up the star. Finally, we present work on the rates that observers may be able to find different types of planet destruction. Planet accretion is proving to be a rich area of study itself, which will also reveal much about stars and planets, especially as it will be possible to observe planets come apart layer by layer.

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