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Paper: H3+ in Warm, Diffuse Gas of the Central Molecular Zone
Volume: 439, The Galactic Center: a Window to the Nuclear Environment of Disk Galaxies
Page: 18
Authors: Oka, T.; Geballe, T. R.; Goto, M.; Usuda, T.; Indriolo, N.; McCall, B. J.
Abstract: Observations of infrared spectra of H3+ and CO have revealed warm (T∼250 K) and diffuse (n∼100 cm–3) gas toward 15 stars from Sgr A* to 30 pc east. This adds a new category of gas to the three previously known. We have now extended the observations to wider regions of the Central Molecular Zone (CMZ) and found two remarkable sightlines approximately 140 pc west and 85 pc east of Sgr A* with strong H3+ spectra giving further evidence for the ubiquity and the large volume filling factor of the newly found gas in the CMZ.
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