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How can I remove the white line in $y=0$? This is my code: 

Rc = 0.1; m = 0; foo[Rp_?NumericQ, tep_?NumericQ] := NIntegrate[-Sin[tp] Exp[- Cos[ (tp - tep)]], {tp, 0, 2 Pi}] DensityPlot[ foo[Sqrt[x^2 + y^2], ArcTan[x, y]], {x, y} \[Element] Region[RegionDifference[Disk[{0, 0}, 2.3], Disk[{0, 0}, 0.8]]], PlotLegends -> Automatic, ColorFunction -> "Rainbow", PlotRange -> All, PlotRange -> {{-2.3, 2.3}, {-2.3, 2.3}, All}]
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1 Answer 1

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How can I remove the white line in y=0

Try Exclusions -> None

Rc = 0.1; m = 0; foo[Rp_?NumericQ, tep_?NumericQ] := NIntegrate[-Sin[tp] Exp[-Cos[(tp - tep)]], {tp, 0, 2 Pi}]; DensityPlot[foo[Sqrt[x^2 + y^2], ArcTan[x, y]], {x, y} \[Element] Region[RegionDifference[Disk[{0, 0}, 2.3], Disk[{0, 0}, 0.8]]], PlotLegends -> Automatic, ColorFunction -> "Rainbow", PlotRange -> {{-2.3, 2.3}, {-2.3, 2.3}, All} ]

Mathematica graphics

DensityPlot[foo[Sqrt[x^2 + y^2], ArcTan[x, y]], {x, y} \[Element] Region[RegionDifference[Disk[{0, 0}, 2.3], Disk[{0, 0}, 0.8]]], PlotLegends -> Automatic, ColorFunction -> "Rainbow", PlotRange -> {{-2.3, 2.3}, {-2.3, 2.3}, All}, Exclusions -> None ]

Mathematica graphics

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