SIMBAD references

2008A&A...492..725M - Astronomy and Astrophysics, volume 492, 725-730 (2008/12-4)

Submillimeter water and ammonia absorption by the peculiar z≃0.89 interstellar medium in the gravitational lens of the PKS 1830-211 system.

MENTEN K.M., GUESTEN R., LEURINI S., THORWIRTH S., HENKEL C., KLEIN B., CARILLI C.L. and REID M.J.

Abstract (from CDS):

Using the Atacama Pathfinder Experiment (APEX) telescope, we have detected the rotational ground-state transitions of ortho-ammonia and ortho-water toward the redshift ≃0.89 absorbing galaxy in the PKS 1830-211 gravitational lens system. We discuss our observations in the context of recent space-borne data obtained for these lines with the SWAS and Odin satellites toward Galactic sources. We find commonalities, but also significant differences between the interstellar media in a galaxy at intermediate redshift and in the Milky Way. Future high-quality observations of the ground-state ammonia transition in PKS 1830-211, together with inversion line data, will lead to strong constraints on the variation in the proton to electron mass ratio over the past 7.2Gyr.

Abstract Copyright:

Journal keyword(s): cosmology: observations - gravitational lensing - astrochemistry - ISM: abundances - ISM: molecules

Simbad objects: 13

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2019.12.14-22:07:28

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