Radio properties of the optically identified supernova remnant G107.0+9.0

Reich, W.; Gao, X.; Reich, P.

doi:10.1051/0004-6361/202140844

Cited by 2 publications

(1 citation statement)

References 26 publications

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“…Detection and characterisation of optical filaments coinciding with the object should also allow in depth comparison with other radio faint SNRs (e.g. Foster et al 2013;Kothes et al 2017;Raymond et al 2020a;Reich et al 2021;Palaiologou et al 2022).…”

Section: What Is Needed To Remove Ambiguities?mentioning

confidence: 99%

SRG/eROSITA discovery of a radio faint X-ray candidate supernova remnant SRGe J003602.3+605421=G121.1-1.9

Khabibullin¹,

Churazov²,

Bykov³

et al. 2022

Preprint

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We report the discovery of a candidate X-ray supernova remnant SRGe J003602.3+605421=G121.1-1.9 in the course of SRG/eROSITA all-sky survey. The object is located at (l,b)=(121.1 • ,-1.9 • ), is ≈ 36 arcmin in angular size and features nearly circular shape. Clear variations in spectral shape of the X-ray emission across the object are detected, with the emission from the inner (within 9') and outer (9'-18') parts dominated by iron and oxygen/neon lines, respectively. The non-equilibrium plasma emission model is capable of describing the spectrum of the outer part with the initial gas temperature 0.1 keV, final temperature 0.5 keV and the ionization age ∼ 2 × 10 10 cm −3 s. The observed spectrum of the inner region is more complicated (plausibly due to the contribution of the outer shell) and requires substantial overabundance of iron for all models we have tried. The derived X-ray absorption equals to (4 − 6) × 10 21 cm −2 , locating the object at the distance beyond 1.5 kpc, and implying its the age ∼ (5 − 30) × 1000 yrs. No bright radio, infrared, H 𝛼 or gamma-ray counterpart of this object have been found in the publicly-available archival data. A model invoking a canonical 10 51 erg SN Ia explosion in the hot and tenuous medium in outer region of the Galaxy ∼9 kpc away might explain the bulk of the observed features.This object might be a rare example of an old SN Ia remnant in our Galaxy still bearing signatures of the ejecta enrichment and probing the thermal and non-thermal properties of the hot phase of the ISM above the cold disc. This scenario can be tested with future deep X-ray and radio observations.

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Section: What Is Needed To Remove Ambiguities?mentioning

confidence: 99%

SRG/eROSITA discovery of a radio faint X-ray candidate supernova remnant SRGe J003602.3+605421=G121.1-1.9

Khabibullin¹,

Churazov²,

Bykov³

et al. 2022

Preprint

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SRG/eROSITA discovery of a radio-faint X-ray candidate supernova remnant SRGe J003602.3+605421 = G121.1−1.9

Khabibullin

Churazov

Bykov

et al. 2023

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

We report the discovery of a candidate X-ray supernova remnant SRGe J003602.3+605421=G121.1-1.9 in the course of SRG/eROSITA all-sky survey. The object is located at (l,b)=(121.1○,-1.9○), is ≈36 arcmin in angular size and has a nearly circular shape. Clear variations in spectral shape of the X-ray emission across the object are detected, with the emission from the inner (within 9’) and outer (9’-18’) parts dominated by iron and oxygen/neon lines, respectively. The non-equilibrium plasma emission model is capable of describing the spectrum of the outer part with the initial gas temperature 0.1 keV, final temperature 0.5 keV and the ionization age ∼2 × 1010 cm−3 s. The observed spectrum of the inner region is more complicated (plausibly due to the contribution of the outer shell) and requires substantial overabundance of iron for all models we have tried. The derived X-ray absorption equals to (4 − 6) × 1021 cm−2, locating the object at the distance beyond 1.5 kpc, and implying its age ∼(5 − 30) × 1000 yrs. No bright radio, infrared, Hα or gamma-ray counterpart of this object have been found in the publicly-available archival data. A model invoking a canonical 1051 erg explosion (either SN Ia or core collapse) in the hot and tenuous medium in the outer region of the Galaxy ∼9 kpc away might explain the bulk of the observed features. This scenario can be tested with future deep X-ray and radio observations.

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Radio properties of the optically identified supernova remnant G107.0+9.0

Cited by 2 publications

References 26 publications

SRG/eROSITA discovery of a radio faint X-ray candidate supernova remnant SRGe J003602.3+605421=G121.1-1.9

SRG/eROSITA discovery of a radio faint X-ray candidate supernova remnant SRGe J003602.3+605421=G121.1-1.9

SRG/eROSITA discovery of a radio-faint X-ray candidate supernova remnant SRGe J003602.3+605421 = G121.1−1.9

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