SIMBAD references

2013MNRAS.432.1955F - Mon. Not. R. Astron. Soc., 432, 1955-1960 (2013/July-1)

Evidence of rocky planetesimals orbiting two Hyades stars.


Abstract (from CDS):

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 2-3M☉ 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.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): stars: abundances - planetary systems - white dwarfs - open clusters and associations: individual: Hyades

Simbad objects: 9

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