Journal ArticleDOI
Establishing new diffuse interstellar band correlations to identify common carriers
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In this article, the Apache Point Observatory Catalog of Optical Diffuse Interstellar Bands (DIBs) were analyzed to establish highly correlated pairs in terms of their equivalent widths (EWs) (r > 0.95), which importantly facilitate the identification of common carriers.Abstract:
\n Observations from the Apache Point Observatory Catalog of Optical Diffuse Interstellar Bands (DIBs) were analysed to establish highly correlated pairs in terms of their equivalent widths (EWs) (r > 0.95), which importantly facilitate the identification of common carriers. A total of 154 846 possible DIB pairs were originally examined, yet only those with a sufficient number of sightlines (n > 9) that included EW uncertainties were subsequently investigated. The highest correlations for the resulting 56 893 DIB pairs are 6284.05–6203.58 Å (r = 0.990 ± 0.001), 6203.58–5780.64 Å (r = 0.986 ± 0.001), 6993.12–6269.89 Å (r = 0.984 ± 0.001), 6843.76–6792.51 Å (r = 0.984 ± 0.005), 6203.58–5487.64 Å (r = 0.983 ± 0.002), and 5061.50–4969.12 Å (r = 0.983 ± 0.009). The bands 5363.77, 5780.64, 6203.58, and 6284.05 Å appear most frequently. Novel relations linked to those DIBs and others warrant further research, in particular those pairs that involve one or both DIBs with low EWs (e.g. 5609.82, 6269.89, 6993.12, and 7224.16 Å). Numerous DIBs correlated with the prominent 4429.33 Å band were also discovered. The intriguing proposal of anionic hydrogen clusters as possible DIB carriers is also discussed.read more
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Journal ArticleDOI
The Apache Point Observatory Catalog of Optical Diffuse Interstellar Bands
Haoyu Fan,L. M. Hobbs,Julie Dahlstrom,Daniel E. Welty,Donald G. York,Brian L. Rachford,Theodore P. Snow,Paule Sonnentrucker,Noah Baskes,Gang Zhao +9 more
TL;DR: The Apache Point Observatory catalog of Optical Diffuse Interstellar Bands (APOIB) as mentioned in this paper contains 559 DIBs with a median SNR between 4,000 and 9,000 A.
Posted ContentDOI
Looking for the weak members of the C$_{60}^+$ family in the interstellar medium
G. A. Galazutdinov,J. Krełowski +1 more
TL;DR: In this paper, it was shown that the strength ratios of the strong-to-weak spectral features attributed to C$60+$+$ are variable, and that the strongest feature, near 9348.4~AA, remains below the level of detection in all spectra.
Journal ArticleDOI
Novel Correlations between Diffuse Interstellar Bands and Optical Reddening
TL;DR: In this article , the Apache Point Observatory catalog of optical diffuse interstellar bands (DIBs) was analyzed to identify novel correlations between DIBs and optical reddening E(B)−V, with a principal aim being to facilitate future identifications of the host molecular carriers.
Journal ArticleDOI
Infrared and Laser-Induced Fluorescence Spectra of Sumanene Isolated in Solid para-Hydrogen.
Isabella Weber,Masashi Tsuge,Pavithra Sundararajan,Masaaki Baba,Hidehiro Sakurai,Yuan-Pern Lee +5 more
TL;DR: In this paper , the authors presented infrared, fluorescence excitation, and dispersed fluorescence spectra of sumanene (C21H12), a bowl-shaped polycyclic aromatic hydrocarbon and a fragment of C60, isolated in solid p-H2.
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STUDIES OF DIFFUSE INTERSTELLAR BANDS V. PAIRWISE CORRELATIONS OF EIGHT STRONG DIBs AND NEUTRAL HYDROGEN, MOLECULAR HYDROGEN, AND COLOR EXCESS
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