The Diffuse Radiation Field at High Galactic Latitudes
We have used GALEX observations of the north and south Galactic poles to study the diffuse ultraviolet background at locations where the Galactic light is expected to be at a minimum. We find offsets of 230-290 photon units in the far-UV (1531 ) and 480-580 photon units in the near-UV (2361 ). Of th...
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| Veröffentlicht in: | The Astrophysical journal 2018-05, Vol.858 (2), p.101 |
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| creator | Akshaya, M. S. Murthy, Jayant Ravichandran, S. Henry, R. C. Overduin, James |
| description | We have used GALEX observations of the north and south Galactic poles to study the diffuse ultraviolet background at locations where the Galactic light is expected to be at a minimum. We find offsets of 230-290 photon units in the far-UV (1531 ) and 480-580 photon units in the near-UV (2361 ). Of this, approximately 120 photon units can be ascribed to dust-scattered light and another 110 photon units (190 in the near-UV) to extragalactic radiation. The remaining radiation is, as yet, unidentified and amounts to 120-180 photon units in the far-UV and 300-400 photon units in the near-UV. We find that molecular hydrogen fluorescence contributes to the far-UV when the 100 m surface brightness is greater than 1.08 MJy sr−1. |
| doi_str_mv | 10.3847/1538-4357/aabcb9 |
| format | Article |
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| subjects | Astrophysics Diffuse radiation dust, extinction Fluorescence Hydrogen local interstellar matter Near ultraviolet radiation Offsets Photons Surface brightness surveys ultraviolet: general ultraviolet: ISM |
| title | The Diffuse Radiation Field at High Galactic Latitudes |
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