This study examines diffuse ultraviolet(UV)emissions in the PHOENIX_00 region near galaxy clusters using GALEX deep observations.In the far-UV(FUV)and near-UV(NUV),we detected backgrounds of 125-200 and225-350 photon ...This study examines diffuse ultraviolet(UV)emissions in the PHOENIX_00 region near galaxy clusters using GALEX deep observations.In the far-UV(FUV)and near-UV(NUV),we detected backgrounds of 125-200 and225-350 photon units(PU),with scatters of±16 and±22 PU,respectively.A moderate FUV-NUV correlation and FUV/NUV ratio below unity indicate FUV-dominated emission and little molecular hydrogen fluorescence or hot-line contributions.Dust influences the FUV background more strongly than the NUV,and UV band emissions correlate more strongly at Galactic latitudes|gb|>71°.29.Infrared(IR)color ratios IR_(60)/IR_(100)(≈0.34±0.03)indicate homogeneous large-grain temperatures and depletion of small grains and PAHs,while IR60/IR25 below 3 indicates AGN activity in the region.The non-zero offsets of IR-UV plots 89 PU(FUV)and199 PU(NUV)indicate the region s baseline illumination and extragalactic radiation.Approximately 11%of the FUV offset and 23%of the NUV offset come from extragalactic background light,while the rest comes from dust-scattered starlight.Finally,our research shows that the interstellar radiation field directly affects the UV background,with the strength inversely proportional to local dust content.展开更多
文摘This study examines diffuse ultraviolet(UV)emissions in the PHOENIX_00 region near galaxy clusters using GALEX deep observations.In the far-UV(FUV)and near-UV(NUV),we detected backgrounds of 125-200 and225-350 photon units(PU),with scatters of±16 and±22 PU,respectively.A moderate FUV-NUV correlation and FUV/NUV ratio below unity indicate FUV-dominated emission and little molecular hydrogen fluorescence or hot-line contributions.Dust influences the FUV background more strongly than the NUV,and UV band emissions correlate more strongly at Galactic latitudes|gb|>71°.29.Infrared(IR)color ratios IR_(60)/IR_(100)(≈0.34±0.03)indicate homogeneous large-grain temperatures and depletion of small grains and PAHs,while IR60/IR25 below 3 indicates AGN activity in the region.The non-zero offsets of IR-UV plots 89 PU(FUV)and199 PU(NUV)indicate the region s baseline illumination and extragalactic radiation.Approximately 11%of the FUV offset and 23%of the NUV offset come from extragalactic background light,while the rest comes from dust-scattered starlight.Finally,our research shows that the interstellar radiation field directly affects the UV background,with the strength inversely proportional to local dust content.
