Pseudo-three-dimensional maps of the diffuse interstellar band at 862 nm
نویسندگان
چکیده
منابع مشابه
Theoretical Prediction of a 443 Nm Transition: a Potential Carrier of a Diffuse Interstellar Band
The carriers of the diffuse interstellar bands (DIBs) is one of the longest standing problems in astronomical spectroscopy. This completely unattributed absorption spectrum stretches from the UV to near-IR and can be seen in multiple interstellar sightlines with the strongest features at 443 nm and 578 nm. Additionally, the number of known features grows with every observation. No known molecul...
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Using the new high-resolution (∼8 km s ) echelle spectrograph on the 3.5 m telescope at the Apache Point Observatory, we have begun a high-sensitivity survey of the diffuse interstellar bands (DIBs) in a large sample of reddened stars. Now that we are 2 years into this long-term survey, our sample includes over 20 reddened stars that show at least one of the DIBs that had been suggested to be c...
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We report about a suprisingly good correlation between the equivalent width of the diffuse interstellar band (DIB) at 8620 Å and the interstellar reddening. Such a correlation offers bright prospects in using the 8620 Å DIB as a tracer of the extinction through the Galaxy in the context of the GAIA mission by ESA. The GAIA mission planned by ESA is aimed to provide astrometry in the 10 microarc...
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The carriers of diffuse interstellar bands are still mysterious species. There exist many arguments that diffuse bands at 5797 and 5850 angstroms have the same carrier. Using high-resolution spectra of few dozens of reddened stars we have searched mutual correlation between intensities of considered bands. Results of our analysis indicate that 5797 and 5850 really tend to have the same carrier.
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We have constructed three-dimensional models for the equilibrium abundance of molecular hydrogen within diffuse interstellar clouds of arbitrary geometry that are illuminated by ultraviolet radiation. The position-dependent photodissociation rate of H2 within such clouds was computed using a 26-ray approximation to model the attenuation of the incident ultraviolet radiation field by dust and by...
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ژورنال
عنوان ژورنال: Science
سال: 2014
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.1253171