Nitrogen hydrides in interstellar gas towards G10.6-0.4 (W31C) and W49N
Poster (konferens), 2011

The PRISMAS key programme has used the HIFI instrument on board Herschel to observe interstellar nitrogen hydrides along the sight-lines towards G10.6-0.4 (W31C) and W49N in order to elucidate the production pathways leading to nitrogen bearing species. We report observations of the NH N=1-0, J=2-1 and J=1-0, ortho-NH2 111-000, ortho-NH3 10-00 and 20-10, para-NH3 21-11 transitions, and unsuccessful searches for NH+ in both sources. All detections show emission and absorption associated directly with the hot-core source itself as well as absorption by foreground material over a wide range of velocities. The NH, NH2 and NH3 spectra show strikingly similar and non-saturated absorption features, which we attribute to diffuse molecular gas. The similarity of the profiles suggest fairly uniform abundances relative to hydrogen. The derived relative and absolute abundances are discussed with reference to models of gas-phase and surface chemistry.

Författare

Carina Persson

Chalmers, Rymd- och geovetenskap, Radioastronomi och astrofysik

Massimo De Luca

Bhaswati Mookerjea

M. Gerin

John H Black

Chalmers, Rymd- och geovetenskap, Radioastronomi och astrofysik

Tom Bell

B. Godard

Javier, R. Goicoechea

G.E. Hassel

Eric Herbst

Pierre Hily-Blant

Karl, M. Menten

Holger S.P. Muller

Henrik Olofsson

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

John C. Pearson

Shanshan Yu

IAU Symposium 280, Poster 76, Session 2, The Molecular Universe, Posters from the proceedings of the 280th Symposium of the International Astronomical Union held in Toledo, Spain, May 30-June 3, 2011, #296

Vol. 280

Ämneskategorier

Astronomi, astrofysik och kosmologi

Fundament

Grundläggande vetenskaper