SIMBAD references

1998A&A...335.1070S - Astronomy and Astrophysics, volume 335, 1070-1076 (1998/7-3)

A search for (H2O)2 in the Galaxy and toward comet Hale-Bopp.

SCHERER M., HAVENITH M., MAUERSBERGER R. and WILSON T.L.

Abstract (from CDS):

The MPIfR 100m telescope, the NRAO 12m telescope, and the IRAM 30m telescope were used to search for low lying rotational transitions of the water dimer, (H2O)2, toward the Galactic cloud cores Orion-KL, W51d, W51e1e2, NGC7538, SgrB2(M) and L134N, and toward comet Hale-Bopp. The comet was observed on December 20, 1996 and March 25/26, 1997 (i.e. near perihelion on April 1) at 24GHz. No lines of (H2O)2 were found. Our limit for the abundance of (H2O)2 relative to that of water (from H218O data) is typically <10–4 toward dense cloud cores. Toward Orion-KL an even more stringent limit of <8x10–6 is derived. The abundance of (H2O)2 relative to H2 is typically <10–10. Our data show that at perihelion the production rate of the water dimer of comet C/1995 O1 (Hale-Bopp) was <5.7x1029s–1. This is less than 6% the production rate of H2O.

Abstract Copyright:

Journal keyword(s): ISM: abundances - ISM: molecules - radio lines: ISM - line: identification - molecular processes - comets: individual: C/1995 O1 (Hale-Bopp)

Simbad objects: 11

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