SIMBAD references

2000ApJ...529..224P - Astrophys. J., 529, 224-228 (2000/January-3)

Fluorescent molecular hydrogen in the extragalactic giant H II region NGC 5461.

PUXLEY P.J., RAMSAY HOWAT S.K. and MOUNTAIN C.M.

Abstract (from CDS):

We present a sensitive 2 µm spectrum of the extragalactic giant H II complex NGC 5461. The spectrum contains detections of vibrationally excited molecular hydrogen transitions from energy levels to 19000 K. Comparison of the line emission with models of excitation in photon-dominated regions demonstrates unambiguously that the gas is excited by the UV light from the newly formed stars. We derive an abundance ratio of ortho-to-para states in the excited gas of 1.15±0.11, which is among the lowest ever recorded.

Abstract Copyright: ∼

Journal keyword(s): Atomic Processes - galaxies: individual (M101) - ISM: H II Regions - Infrared: ISM: Lines and Bands - ISM: individual (NGC 5461)

Simbad objects: 10

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2000ApJ...529..224P and select 'bookmark this link' or equivalent in the popup menu