The absence of CO from the dust peak around e Eri

IM Coulson, WRF Dent, Jane Sophia Greaves

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8 Citations (Scopus)

Abstract

We have searched for the J = 2-1 emission of carbon monoxide (CO) from the brightest peak in the epsilon Eridani (epsilon Eri) dust disc - without success. The non-detection sets 3sigma upper limits to the mass of CO gas in the dust peak of 3.3 x 10(16) kg and to the total amount of (H-2) gas in the disc of 8 x 10(19) kg. The paucity of gas in the disc (there is similar to1000x more dust) constrains the composition of orbiting comets or icy planetesimals. If these comprise the pre-eminent reservoir of dust and gas in both the Edgeworth-Kuiper Belt (EKB) and the epsilon Eri disc then it seems unlikely that the epsilon Eri planetesimals can be as rich in volatiles as their EKB counterparts.

Original languageEnglish
Pages (from-to)L39-L42
Number of pages4
JournalMonthly Notices of the Royal Astronomical Society
Volume348
Issue number3
DOIs
Publication statusPublished - 1 Mar 2004

Keywords

  • Kuiper Belt
  • circumstellar matter
  • stairs : individual : epsilon Eri
  • EDGEWORTH-KUIPER BELT
  • VEGA-EXCESS STARS
  • GIANT PLANETS
  • MOLECULAR-HYDROGEN
  • THERMAL EVOLUTION
  • BETA-PICTORIS
  • DEBRIS DISKS
  • SUBMILLIMETER
  • ERIDANI
  • GAS

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