Diffuse Interstellar Bands: Physical Conditions that Facilitate the Formation or Preservation of Their Carriers

Details Diffuse Interstellar Bands: Physical Conditions that Facilitate the Formation or Preservation of Their Carriers Diffuse Interstellar Bands: Physical Conditions that Facilitate the Formation or Preservation of Their Carriers

Jan 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...493..217k&link_type=abstract

Astrophysical Journal v.493, p.217

Astronomy and Astrophysics

Astronomy

21

Ism: Dust, Extinction, Ism: Abundances, Ism: General

Scientific paper

This paper suggests that the formation and/or preservation of the carriers of at least some of the diffuse interstellar bands (DIBs) depends on the level of ionization of certain interstellar atoms, such as potassium and calcium inside H I clouds. The spectral lines of these elements are apparently well correlated with the narrow diffuse bands, such as 5797 or 6379 Angstroms. Thus, the physical conditions that facilitate the growing abundance of neutral alkali atoms also facilitate the formation or preservation of the carriers of the narrow diffuse bands. The broad features, such as 5780 or 6284 Angstroms, apparently originate in different ionization conditions.

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