On the soft X-ray emission of M82

J. Liu; Q. D. Wang; S. Mao

doi:10.1002/asna.201211667

On the soft X-ray emission of M82

J. Liu, Q. D. Wang, S. Mao

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Abstract

We present a spatial analysis of the soft X-ray and Hα emissions from the outflow of the starburst galaxy M82. We find that the two emissions are tightly correlated on various scales. The O VII triplet of M82, as resolved by X-ray grating observations of XMM-Newton, is dominated by the forbidden line, inconsistent with the thermal prediction. The O VII triplet also shows some spatial variations. We discuss three possible explanations for the observed O VII triplet, including the charge exchange at interfaces between the hot outflow and neutral cool gas, a collisional non-equilibrium-ionization recombining plasma, and resonance scattering. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Original language	English
Pages (from-to)	365-368
Number of pages	3
Journal	Astronomische Nachrichten
Volume	333
Issue number	4
DOIs	https://doi.org/10.1002/asna.201211667
Publication status	Published - Apr 2012

Keywords

Atomic processes
Galaxies: individual (M82)
Galaxies: starburst
X-rays: galaxies

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10.1002/asna.201211667

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title = "On the soft X-ray emission of M82",

abstract = "We present a spatial analysis of the soft X-ray and Hα emissions from the outflow of the starburst galaxy M82. We find that the two emissions are tightly correlated on various scales. The O VII triplet of M82, as resolved by X-ray grating observations of XMM-Newton, is dominated by the forbidden line, inconsistent with the thermal prediction. The O VII triplet also shows some spatial variations. We discuss three possible explanations for the observed O VII triplet, including the charge exchange at interfaces between the hot outflow and neutral cool gas, a collisional non-equilibrium-ionization recombining plasma, and resonance scattering. {\textcopyright} 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.",

keywords = "Atomic processes, Galaxies: individual (M82), Galaxies: starburst, X-rays: galaxies",

author = "J. Liu and Wang, {Q. D.} and S. Mao",

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doi = "10.1002/asna.201211667",

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volume = "333",

pages = "365--368",

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TY - JOUR

T1 - On the soft X-ray emission of M82

AU - Liu, J.

AU - Wang, Q. D.

AU - Mao, S.

PY - 2012/4

Y1 - 2012/4

N2 - We present a spatial analysis of the soft X-ray and Hα emissions from the outflow of the starburst galaxy M82. We find that the two emissions are tightly correlated on various scales. The O VII triplet of M82, as resolved by X-ray grating observations of XMM-Newton, is dominated by the forbidden line, inconsistent with the thermal prediction. The O VII triplet also shows some spatial variations. We discuss three possible explanations for the observed O VII triplet, including the charge exchange at interfaces between the hot outflow and neutral cool gas, a collisional non-equilibrium-ionization recombining plasma, and resonance scattering. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

AB - We present a spatial analysis of the soft X-ray and Hα emissions from the outflow of the starburst galaxy M82. We find that the two emissions are tightly correlated on various scales. The O VII triplet of M82, as resolved by X-ray grating observations of XMM-Newton, is dominated by the forbidden line, inconsistent with the thermal prediction. The O VII triplet also shows some spatial variations. We discuss three possible explanations for the observed O VII triplet, including the charge exchange at interfaces between the hot outflow and neutral cool gas, a collisional non-equilibrium-ionization recombining plasma, and resonance scattering. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

KW - Atomic processes

KW - Galaxies: individual (M82)

KW - Galaxies: starburst

KW - X-rays: galaxies

U2 - 10.1002/asna.201211667

DO - 10.1002/asna.201211667

M3 - Article

SN - 0004-6337

VL - 333

SP - 365

EP - 368

JO - Astronomische Nachrichten

JF - Astronomische Nachrichten

IS - 4

ER -

On the soft X-ray emission of M82

Abstract

Keywords

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