An Extremely Large Excess of 18O in the Hydrogen-deficient Carbon Star HD 137613

Clayton, Geoffrey C; Herwig, Falk; Geballe, Thomas R; Asplund, Martin; Tenenbaum, Emily D; Engelbracht, Charles W; Gordon, Karl D

Cultural advice

The Australian National University acknowledges, celebrates and pays our respects to the Ngunnawal and Ngambri people of the Canberra region and to all First Nations Australians on whose traditional lands we meet and work, and whose cultures are among the oldest continuing cultures in human history.

Aboriginal and Torres Strait Islander peoples are advised that ANU Library collections may include images, names, voices, and other representations of deceased persons.

Material in the collection may contain terms, language or views that reflect the period in which the item was created and may be considered inappropriate today.

An Extremely Large Excess of 18O in the Hydrogen-deficient Carbon Star HD 137613

Date

2005

Authors

Clayton, Geoffrey C

Herwig, Falk

Geballe, Thomas R

Asplund, Martin

Tenenbaum, Emily D

Engelbracht, Charles W

Gordon, Karl D

Publisher

IOP Publishing

Abstract

We report the discovery of a uniquely large excess of 18O in the hydrogen-deficient carbon (HdC) star HD 137613 based on a spectrum of the first-overtone bands of CO at 2.3-2.4 μm in which three strong absorption bands of 12C 18O are clearly present. Ban