Infrared diffuse interstellar bands in the Galactic Centre region

T. R. Geballe (), F. Najarro, D. F. Figer, B. W. Schlegelmilch and D. de la Fuente
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T. R. Geballe: Gemini Observatory, 670 N. A’ohoku Place
F. Najarro: Centro de Astrobiología (CSIC-INTA), Ctra. Torrejón a Ajalvir km 4
D. F. Figer: Center for Detectors, Rochester Institute of Technology
B. W. Schlegelmilch: University of California
D. de la Fuente: Centro de Astrobiología (CSIC-INTA), Ctra. Torrejón a Ajalvir km 4

Nature, 2011, vol. 479, issue 7372, 200-202

Abstract: Reading between the lines First observed by Mary Lea Heger in 1922, diffuse interstellar bands, or DIBs, are dark absorption lines in the spectra of distant stars. More than 500 DIBs are known, but surprisingly none has been convincingly identified with a specific element or molecule. Of the known DIBs, only two have wavelengths beyond one micrometre, but here Geballe et al. report 13 DIBs in the 1.5–1.8 μm interval on high-extinction sightlines towards stars in the Galactic Centre. They appear to originate almost entirely in the Galactic Centre region, a much warmer and harsher environment than that associated with previously observed DIBs.

Date: 2011
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DOI: 10.1038/nature10527

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