A survey of N2H(+) in dense clouds - Implications for interstellar nitrogen and ion-molecule chemistry

Details A survey of N2H(+) in dense clouds - Implications for interstellar nitrogen and ion-molecule chemistry A survey of N2H(+) in dense clouds - Implications for interstellar nitrogen and ion-molecule chemistry

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...387..417w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 387, March 1, 1992, p. 417-429. Research supported by Arizona State Univers

Astronomy and Astrophysics

Astrophysics

48

Azo Compounds, Interstellar Chemistry, Interstellar Matter, Molecular Clouds, Dark Matter, Electron Transitions, Emission Spectra, Formyl Ions, Molecular Rotation, Spectral Line Width

Scientific paper

Attention is given to spectra of the N2(H(+) J = 1 - 0, J = 3 - 2 and (N-15)NH(+) and N(N-15)H(+) J = 1 - 0 rotational transitions obtained toward a sample of star-forming and cold dark clouds in the Galaxy. Toward the star-forming regions, line profiles are relatively narrow (typically 1-5 km/s) and show no evidence of line wings, in contrast to the spectra of HCO(+). It is inferred from the apparent absence of N2H(+) in hot, shocked gas that this ion may be a selective tracer of extended, quiescent material. Column densities of N2H(+) were found to be about 5 x 10 exp 12/sq cm toward cold clouds and about 10 exp 14/sq cm toward warm clouds. These values correspond to fractional abundances, relative to H2, of about 4 x 10 exp -10 toward both the warm and cold clouds. It is concluded that the abundance and distribution of N2H(+) is well explained by the ion-molecule chemistry, provided it has reached the steady state, as is found for interstellar NH3. The N2H(+) results are advanced as further evidence that interstellar nitrogen chemistry is anomalous.

Affiliated with

Also associated with

No associations

Rating

A survey of N2H(+) in dense clouds - Implications for interstellar nitrogen and ion-molecule chemistry does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A survey of N2H(+) in dense clouds - Implications for interstellar nitrogen and ion-molecule chemistry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A survey of N2H(+) in dense clouds - Implications for interstellar nitrogen and ion-molecule chemistry will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1215187