Spectral components of the radio composite supernova remnant G11.2-0.3

Cindy Tam; Mallory S.E. Roberts; Victoria M. Kaspi

doi:10.1086/340229

Spectral components of the radio composite supernova remnant G11.2-0.3

Cindy Tam, Mallory S.E. Roberts, Victoria M. Kaspi

Physics

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

Abstract

We present a high-resolution radio study of the supernova remnant (SNR) G11.2-0.3 using archival Very Large Array data. Spectral tomography is performed to determine the properties of this composite-type SNR's individual components, which have only recently been distinguished through X-ray observations. Our results indicate that the spectral index of the pulsar wind nebula (PWN), or plerion, is α_P = 0.25_-0.10^-0.05. We observe a spectral index of α_S = 0.56 ± 0.02 throughout most of the SNR shell region but also detect a gradient in α in the southeastern component. We compare the spectral index and flux density with recent single-dish radio data of the source. Also, the radio efficiency and morphological properties of this PWN are found to be consistent with results for other known PWN systems.

Original language	English (US)
Pages (from-to)	202-208
Number of pages	7
Journal	Astrophysical Journal
Volume	572
Issue number	1 I
DOIs	https://doi.org/10.1086/340229
State	Published - Jun 10 2002

Keywords

Pulsars: individual (PSR J1811-1925)
Radio continuum: ISM
Supernova remnants
Supernovae: individual (G11.2-0.3)

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1086/340229

Cite this

@article{b520579222f34e39be97c3a820357d3e,

title = "Spectral components of the radio composite supernova remnant G11.2-0.3",

abstract = "We present a high-resolution radio study of the supernova remnant (SNR) G11.2-0.3 using archival Very Large Array data. Spectral tomography is performed to determine the properties of this composite-type SNR's individual components, which have only recently been distinguished through X-ray observations. Our results indicate that the spectral index of the pulsar wind nebula (PWN), or plerion, is αP = 0.25-0.10-0.05. We observe a spectral index of αS = 0.56 ± 0.02 throughout most of the SNR shell region but also detect a gradient in α in the southeastern component. We compare the spectral index and flux density with recent single-dish radio data of the source. Also, the radio efficiency and morphological properties of this PWN are found to be consistent with results for other known PWN systems.",

keywords = "Pulsars: individual (PSR J1811-1925), Radio continuum: ISM, Supernova remnants, Supernovae: individual (G11.2-0.3)",

author = "Cindy Tam and Roberts, {Mallory S.E.} and Kaspi, {Victoria M.}",

year = "2002",

month = jun,

day = "10",

doi = "10.1086/340229",

language = "English (US)",

volume = "572",

pages = "202--208",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "1 I",

}

TY - JOUR

T1 - Spectral components of the radio composite supernova remnant G11.2-0.3

AU - Tam, Cindy

AU - Roberts, Mallory S.E.

AU - Kaspi, Victoria M.

PY - 2002/6/10

Y1 - 2002/6/10

N2 - We present a high-resolution radio study of the supernova remnant (SNR) G11.2-0.3 using archival Very Large Array data. Spectral tomography is performed to determine the properties of this composite-type SNR's individual components, which have only recently been distinguished through X-ray observations. Our results indicate that the spectral index of the pulsar wind nebula (PWN), or plerion, is αP = 0.25-0.10-0.05. We observe a spectral index of αS = 0.56 ± 0.02 throughout most of the SNR shell region but also detect a gradient in α in the southeastern component. We compare the spectral index and flux density with recent single-dish radio data of the source. Also, the radio efficiency and morphological properties of this PWN are found to be consistent with results for other known PWN systems.

AB - We present a high-resolution radio study of the supernova remnant (SNR) G11.2-0.3 using archival Very Large Array data. Spectral tomography is performed to determine the properties of this composite-type SNR's individual components, which have only recently been distinguished through X-ray observations. Our results indicate that the spectral index of the pulsar wind nebula (PWN), or plerion, is αP = 0.25-0.10-0.05. We observe a spectral index of αS = 0.56 ± 0.02 throughout most of the SNR shell region but also detect a gradient in α in the southeastern component. We compare the spectral index and flux density with recent single-dish radio data of the source. Also, the radio efficiency and morphological properties of this PWN are found to be consistent with results for other known PWN systems.

KW - Pulsars: individual (PSR J1811-1925)

KW - Radio continuum: ISM

KW - Supernova remnants

KW - Supernovae: individual (G11.2-0.3)

UR - http://www.scopus.com/inward/record.url?scp=0038350370&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0038350370&partnerID=8YFLogxK

U2 - 10.1086/340229

DO - 10.1086/340229

M3 - Article

AN - SCOPUS:0038350370

SN - 0004-637X

VL - 572

SP - 202

EP - 208

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 I

ER -

Spectral components of the radio composite supernova remnant G11.2-0.3

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this