X-Ray Constraints on Cluster Magnetic Fields

Henriksen Mark

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X-Ray Constraints on Cluster Magnetic Fields

机译：团簇磁场的X射线约束

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LowerlimitstotheintraclustermagneticfieldarederivedfrommodelingbroadbandX-rayspectraof6galaxyclusterswithradiohalos(A401,A754,A1367,Coma=A1656,A2256,andA2319).The0.7a€“10keVspectraforallclusterswereobtainedwiththeAdvancedSatelliteforCosmologyandAstrophysics(ASCA)GasImagingSpectrometer(GIS).ForA401,A754,A1367,andA1656,datafromtheHEAO1-A2HighEnergyDetector(HED)(2a€“60keV)wasincludedinajointfittofurtherconstraintheallowednon-thermalcomponent.Upperlimitstothenon-thermalX-rayemissionareafactorofa??10improvementoverpreviousvalues.Lowerlimitstotheaveragemagneticfieldderivedfromtheseupperlimitsandtheradiospectralparametersrangefrom0.08a€“0.30??G.Aseedintraclusterfieldamplifiedbyturbulencefromgalaxymotionthroughtheintraclustermediumshouldhaveanaveragevalueintherangea??0.1a€“0.2,thusthelackofanydetectionsmakesitunlikelythatfieldamplificationisduetogalaxywakes.Inaddition,alloftheseclustershaveanasymmetricsurfacebrightnessdistributionwhileseveralalsohaveX-rayspectroscopicevidenceofamerger.Wesuggestthatclustermergersratherthangalaxywakesarethesourceofthemagneticfieldamplification.

机译：LowerlimitstotheintraclustermagneticfieldarederivedfrommodelingbroadbandX-rayspectraof6galaxyclusterswithradiohalos（A401，A754，A1367，昏迷= A1656，A2256，andA2319）.The0.7a€“10keVspectraforallclusterswereobtainedwiththeAdvancedSatelliteforCosmologyandAstrophysics（ASCA）GasImagingSpectrometer（GIS）.ForA401，A754，A1367，andA1656，datafromtheHEAO1-A2HighEnergyDetector（HED）（2A€ “60keV）wasincludedinajointfittofurtherconstraintheallowednon-thermalcomponent.Upperlimitstothenon-thermalX-rayemissionareafactorofa ?? 10improvementoverpreviousvalues.Lowerlimitstotheaveragemagneticfieldderivedfromtheseupperlimitsandtheradiospectralparametersrangefrom0.08a€“0.30 ?? G.Aseedintraclusterfieldamplifiedbyturbulencefromgalaxymotionthroughtheintraclustermediumshouldhaveanaveragevalueintherangea ?? 0.1A€“0.2，thusthelackofanydetectionsmakesitunlikelythatfieldamplificationisduetogalaxywakes.Inaddition，alloftheseclustershaveanasymmetricsurfacebrightnessdistributionwhileseveralalsohaveX-rayspectroscopicevidenceofamerger.Wesugges与银河唤醒相比，这种潜在的竞争者是磁场放大的来源。

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《PASJ: Publications of the Astronomical Society of Japan》 |1998年第4期|共页
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2. CONSTRAINTS ON THE SURFACE MAGNETIC FIELDS AND AGE OF A COOL HYPERGIANT: XMM-NEWTON X-RAY OBSERVATIONS OF VY CMa [J] . Rodolfo Montez, Jr.1, Joel H. Kastner2, The Astrophysical journal . 2015,第1期

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3. CONSTRAINTS ON COSMIC RAYS, MAGNETIC FIELDS, AND DARK MATTER FROM GAMMA-RAY OBSERVATIONS OF THE COMA CLUSTER OF GALAXIES WITH VERITAS AND FERMI [J] . T. Arlen1, T. Aune2, M. Beilicke3, The Astrophysical journal . 2012,第2期

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4. Magnetic fields, winds and X-rays of massive stars in the Orion nebula cluster [C] . Véronique Petit, Gregg A. Wade, Evelyne Alecian, Symposium of the International Astronomical Union . 2011

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5. Constraints on cluster structure and cosmology from X-ray and Sunyaev-Zel'dovich effect properties of galaxy clusters. [D] . Laroque, Samuel J. 2005

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6. Numerical simulation of chainlike cluster movement of feeble magnetic particles by induced magnetic dipole moment under high magnetic fields [O] . Tsutomu Ando, Noriyuki Hirota, Hitoshi Wada 2009

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7. X-ray Constraints on Cluster Magnetic Fields [O] . Henriksen, Mark 1998

机译：聚类磁场的X射线约束

X-Ray Constraints on Cluster Magnetic Fields

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