<p>This paper presents an investigation of the X-ray emission associated with the Wolf–Rayet star, WR 48-6, using observations from the <i>XMM-Newton</i> and <i>Chandra</i> X-ray telescopes covering two epochs separated by eleven months. The X-ray spectrum of WR 48-6 is well explained by a two-temperature plasma model, with cool and hot plasma temperatures of <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="12036_2025_10039_Article_IEq1.gif" Format="GIF" Height="22" Rendition="HTML" Resolution="72" Type="Linedraw" Width="46" /> </InlineMediaObject> <EquationSource Format="TEX">\(0.8_{-0.2}^{+0.1}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>0</mn> <mo>.</mo> <msubsup> <mn>8</mn> <mrow> <mo>-</mo> <mn>0.2</mn> </mrow> <mrow> <mo>+</mo> <mn>0.1</mn> </mrow> </msubsup> </mrow> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="12036_2025_10039_Article_IEq2.gif" Format="GIF" Height="22" Rendition="HTML" Resolution="72" Type="Linedraw" Width="60" /> </InlineMediaObject> <EquationSource Format="TEX">\(2.86_{-0.66}^{+1.01}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>2</mn> <mo>.</mo> <msubsup> <mn>86</mn> <mrow> <mo>-</mo> <mn>0.66</mn> </mrow> <mrow> <mo>+</mo> <mn>1.01</mn> </mrow> </msubsup> </mrow> </math></EquationSource> </InlineEquation> keV. No significant X-ray variability is observed during these two epochs of observations. However, an increase in the local hydrogen column density accompanied by a decrease in the intrinsic X-ray flux between two epochs of observations is seen. Additionally, the intrinsic X-ray luminosity is found to be more than <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="12036_2025_10039_Article_IEq3.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="29" /> </InlineMediaObject> <EquationSource Format="TEX">\(10^{33}\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mn>10</mn> <mn>33</mn> </msup> </math></EquationSource> </InlineEquation> erg <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="12036_2025_10039_Article_IEq4.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="23" /> </InlineMediaObject> <EquationSource Format="TEX">\(\hbox {s}^{-1}\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mtext>s</mtext> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </msup> </math></EquationSource> </InlineEquation> during both epochs of observations. Based on the analysis presented, WR 48-6 is a promising colliding wind binary candidate with a possible companion of spectral type O5–O6.</p>

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X-ray study of WR 48-6: A possible colliding wind binary

  • Vishal Jadoliya,
  • Jeewan C. Pandey,
  • Anandmayee Tej

摘要

This paper presents an investigation of the X-ray emission associated with the Wolf–Rayet star, WR 48-6, using observations from the XMM-Newton and Chandra X-ray telescopes covering two epochs separated by eleven months. The X-ray spectrum of WR 48-6 is well explained by a two-temperature plasma model, with cool and hot plasma temperatures of \(0.8_{-0.2}^{+0.1}\) 0 . 8 - 0.2 + 0.1 and \(2.86_{-0.66}^{+1.01}\) 2 . 86 - 0.66 + 1.01 keV. No significant X-ray variability is observed during these two epochs of observations. However, an increase in the local hydrogen column density accompanied by a decrease in the intrinsic X-ray flux between two epochs of observations is seen. Additionally, the intrinsic X-ray luminosity is found to be more than \(10^{33}\) 10 33 erg \(\hbox {s}^{-1}\) s - 1 during both epochs of observations. Based on the analysis presented, WR 48-6 is a promising colliding wind binary candidate with a possible companion of spectral type O5–O6.