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Evidence of rocky planetesimals orbiting two Hyades stars
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Farihi, J., Gänsicke, B. T. (Boris T.) and Koester, Detlev (2013) Evidence of rocky planetesimals orbiting two Hyades stars. Monthly Notices of the Royal Astronomical Society, Volume 432 (Number 3). pp. 1955-1960. doi:10.1093/mnras/stt432 ISSN 0035-8711.
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Official URL: http://dx.doi.org/10.1093/mnras/stt432
Abstract
The Hyades is the nearest open cluster, relatively young and containing numerous A-type stars; its known age, distance, and metallicity make it an ideal site to study planetary systems around 2–3 M⊙ stars at an epoch similar to the late heavy bombardment. Hubble Space Telescope far-ultraviolet spectroscopy strongly suggests ongoing, external metal pollution in two remnant Hyads. For ongoing accretion in both stars, the polluting material has log [n(Si)/n(C)] > 0.2, is more carbon deficient than chondritic meteorites and is thus rocky. These data are consistent with a picture where rocky planetesimals and small planets have formed in the Hyades around two main-sequence A-type stars, whose white dwarf descendants bear the scars. These detections via metal pollution are shown to be equivalent to infrared excesses of LIR/L* ∼ 10−6 in the terrestrial zone of the stars.
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||
| Publisher: | Oxford University Press | ||||||||
| ISSN: | 0035-8711 | ||||||||
| Official Date: | 1 July 2013 | ||||||||
| Dates: |
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| Volume: | Volume 432 | ||||||||
| Number: | Number 3 | ||||||||
| Page Range: | pp. 1955-1960 | ||||||||
| DOI: | 10.1093/mnras/stt432 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access |
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