Very high resolution profiles of four diffuse interstellar bands

Ultra-high-resolution (R ∼ 300 000) profiles of four diffuse interstellar bands (DIBs) are presented. The λλ 5797-, 5850-, 6196- and 6379- ˚ A DIBs were observed towards the reddened supergiant HD 24398, a line of sight free of Doppler splitting; thus the observed profiles can be considered as intrinsic to the DIB carriers. Three of the profiles show substructure which supports the hypothesis of a molecular origin for these DIBs.

[1]  D. York,et al.  Some Diffuse Interstellar Bands Related to Interstellar C2 Molecules , 2003 .

[2]  C. Moutou,et al.  Fine structure of profiles of weak diffuse interstellar bands , 2002 .

[3]  C. Moutou,et al.  Very high resolution profiles of 6196 Å and 6614 Å diffuse interstellar bands , 2002 .

[4]  T. Snow.  A Search for Fine Structure within the 4430 Å Diffuse Interstellar Band , 2002 .

[5]  G. Walker,et al.  Profiles of the λ6196 and λ6379 Diffuse Interstellar Bands , 2001 .

[6]  M. Schmidt,et al.  A possible sets of diffuse bands originating at the same carrier , 2001 .

[7]  G. Galazutdinov,et al.  Profiles of blue and infrared diffuse interstellar bands , 2001 .

[8]  J. Krełowski,et al.  Origin of diffuse interstellar bands: spectroscopic studies of their possible carriers , 2000 .

[9]  B. Foing,et al.  On the identification of the C+60 interstellar features , 2000 .

[10]  G. Walker,et al.  Narrow Diffuse Interstellar Bands: A Survey with Precise Wavelengths , 2000 .

[11]  G. Walker,et al.  Gas-Phase Electronic Spectra of Carbon-Chain Radicals Compared with Diffuse Interstellar Band Observations , 2000 .

[12]  L. Allamandola,et al.  Jet-discharge cavity ring-down spectroscopy of ionized polycyclic aromatic hydrocarbons: progress in testing the PAH hypothesis for the diffuse interstellar band problem. , 1999, Chemical physics letters.

[13]  R. Hibbins,et al.  Ultrafine Structure in the λ5797 Diffuse Interstellar Absorption Band , 1998 .

[14]  M. Schmidt,et al.  Intrinsic Profiles of Strong Diffuse Interstellar Bands , 1997 .

[15]  G. Herbig.  The diffuse interstellar bands. IX: Constraints on the identification , 1993 .

[16]  L. J. Ijzendoorn,et al.  Shapes and Correlations as Observational Discriminants for the Origin of Diffuse Bands , 1986 .

[17]  D. Soderblom,et al.  The diffuse interstellar bands. V - High-resolution observations , 1982 .

[18]  G. Herbig.  The diffuse interstellar bands. IV. The region 4400--6850 A , 1975 .

[19]  A. Mckellar.  The Problems of Possible Molecular Identification for Interstellar Lines , 1941 .

[20]  C. S. Beals,et al.  A LINE AT Λ4430. 5 OF POSSIBLY INTERSTELLAR ORIGIN , 1937 .

[21]  P. Merrill.  UNIDENTIFIED INTERSTELLAR LINES , 1934 .