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Title: | Components of the diffuse ultraviolet radiation at high latitudes |
Authors: | Akshaya, M. S Murthy, J Ravichandran, S Henry, R. C Overduin, J |
Keywords: | ISM: clouds dust, extinction diffuse radiation ultraviolet: ISM |
Issue Date: | 8-Aug-2019 |
Publisher: | Oxford University Press on behalf of the Royal Astronomical Society |
Citation: | Monthly Notices of the Royal Astronomical Society, Vol. 489, No. 1, pp.1120--1126 |
Abstract: | We have used data from the Galaxy Evolution Explorer to study the different components of the diffuse ultraviolet background in the region between the Galactic latitudes 70◦–80◦. We find an offset at zero dust column density (E(B − V) = 0) of 240 ± 18 photon units in the FUV (1539 Å) and 394 ± 37 photon units in the NUV (2316 Å). This is approximately half of the total observed radiation with the remainder divided between an extragalactic component of 114 ± 18 photon units in the FUV and 194 ± 37 photon units in the NUV and starlight scattered by Galactic dust at high latitudes. The optical constants of the dust grains were found to be a = 0.4 ± 0.1 and g = 0.8 ± 0.1 (FUV) and a = 0.4 ± 0.1 and g = 0.5 ± 0.1 (NUV). We cannot differentiate between a Galactic or extragalactic origin for the zero-offset but can affirm that it is not from any known source. |
Description: | Restricted Access © Royal Astronomical Society https://doi.org/10.1093/mnras/stz2186 |
URI: | http://prints.iiap.res.in/handle/2248/7036 |
ISSN: | 1365-2966 |
Appears in Collections: | IIAP Publications |
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Components of the diffuse ultraviolet radiation at high latitudes.pdf Restricted Access | Restricted Access | 9.88 MB | Adobe PDF | View/Open Request a copy |
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