A Suzaku observation of the low-ionization Fe-line emission from RCW 86

Masaru Ueno; Rie Sato; Jun Kataoka; Ilana Harrus; Robert Petre

doi:10.1143/PTPS.169.84

A Suzaku observation of the low-ionization Fe-line emission from RCW 86

Masaru Ueno^*, Rie Sato, Jun Kataoka, Ilana Harrus, Robert Petre

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The newly operational X-ray satellite Suzaku observed the southwestern quadrant of the supernova remnant (SNR) RCW 86 in February 2006 to study the nature of the 6.4 keV emission line. The new data localize it for the first time; most of the line emission is adjacent and interior to the forward shock and not at the locus of the continuum hard emission. We also report the first detection of a 7.1 keV line that we interpret as the Kβ emission from low-ionization iron. The Fe-K line features are consistent with a non-equilibrium plasma of Fe-rich ejecta with n_et > 10⁹ cm^-3 s and kT_e ∼ 5 keV. This combination of low net and high kT_e suggests collisionless electron heating in an SNR shock. The Fe Ka line shows evidence for intrinsic broadening, with a width of 47 (34-59) eV (99% error region). The difference of the spatial distributions of the hard continuum above 3 keV and the Fe-K line emission support a synchrotron origin for the hard continuum.

Original language	English
Pages (from-to)	84-87
Number of pages	4
Journal	Progress of Theoretical Physics Supplement
Issue number	169
DOIs	https://doi.org/10.1143/PTPS.169.84
Publication status	Published - 2007
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

Access to Document

10.1143/PTPS.169.84

Cite this

@article{cbc475d520c04dd1b2c71e252662580a,

title = "A Suzaku observation of the low-ionization Fe-line emission from RCW 86",

abstract = "The newly operational X-ray satellite Suzaku observed the southwestern quadrant of the supernova remnant (SNR) RCW 86 in February 2006 to study the nature of the 6.4 keV emission line. The new data localize it for the first time; most of the line emission is adjacent and interior to the forward shock and not at the locus of the continuum hard emission. We also report the first detection of a 7.1 keV line that we interpret as the Kβ emission from low-ionization iron. The Fe-K line features are consistent with a non-equilibrium plasma of Fe-rich ejecta with net > 109 cm-3 s and kTe ∼ 5 keV. This combination of low net and high kTe suggests collisionless electron heating in an SNR shock. The Fe Ka line shows evidence for intrinsic broadening, with a width of 47 (34-59) eV (99% error region). The difference of the spatial distributions of the hard continuum above 3 keV and the Fe-K line emission support a synchrotron origin for the hard continuum.",

author = "Masaru Ueno and Rie Sato and Jun Kataoka and Ilana Harrus and Robert Petre",

year = "2007",

doi = "10.1143/PTPS.169.84",

language = "English",

pages = "84--87",

journal = "Progress of Theoretical Physics Supplement",

issn = "0375-9687",

publisher = "Yukawa Institute for Theoretical Physics",

number = "169",

}

TY - JOUR

T1 - A Suzaku observation of the low-ionization Fe-line emission from RCW 86

AU - Ueno, Masaru

AU - Sato, Rie

AU - Kataoka, Jun

AU - Harrus, Ilana

AU - Petre, Robert

PY - 2007

Y1 - 2007

N2 - The newly operational X-ray satellite Suzaku observed the southwestern quadrant of the supernova remnant (SNR) RCW 86 in February 2006 to study the nature of the 6.4 keV emission line. The new data localize it for the first time; most of the line emission is adjacent and interior to the forward shock and not at the locus of the continuum hard emission. We also report the first detection of a 7.1 keV line that we interpret as the Kβ emission from low-ionization iron. The Fe-K line features are consistent with a non-equilibrium plasma of Fe-rich ejecta with net > 109 cm-3 s and kTe ∼ 5 keV. This combination of low net and high kTe suggests collisionless electron heating in an SNR shock. The Fe Ka line shows evidence for intrinsic broadening, with a width of 47 (34-59) eV (99% error region). The difference of the spatial distributions of the hard continuum above 3 keV and the Fe-K line emission support a synchrotron origin for the hard continuum.

AB - The newly operational X-ray satellite Suzaku observed the southwestern quadrant of the supernova remnant (SNR) RCW 86 in February 2006 to study the nature of the 6.4 keV emission line. The new data localize it for the first time; most of the line emission is adjacent and interior to the forward shock and not at the locus of the continuum hard emission. We also report the first detection of a 7.1 keV line that we interpret as the Kβ emission from low-ionization iron. The Fe-K line features are consistent with a non-equilibrium plasma of Fe-rich ejecta with net > 109 cm-3 s and kTe ∼ 5 keV. This combination of low net and high kTe suggests collisionless electron heating in an SNR shock. The Fe Ka line shows evidence for intrinsic broadening, with a width of 47 (34-59) eV (99% error region). The difference of the spatial distributions of the hard continuum above 3 keV and the Fe-K line emission support a synchrotron origin for the hard continuum.

UR - http://www.scopus.com/inward/record.url?scp=41149132978&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=41149132978&partnerID=8YFLogxK

U2 - 10.1143/PTPS.169.84

DO - 10.1143/PTPS.169.84

M3 - Article

AN - SCOPUS:41149132978

SN - 0375-9687

SP - 84

EP - 87

JO - Progress of Theoretical Physics Supplement

JF - Progress of Theoretical Physics Supplement

IS - 169

ER -

A Suzaku observation of the low-ionization Fe-line emission from RCW 86

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this