Suzaku observations of the hard X-ray spectrum of Vela Jr

Abstract

We report the results of Suzaku observations of the young supernova remnant, Vela Jr.\ (RX J0852.0$-$4622), which is known to emit synchrotron X-rays, as well as TeV gamma-rays. Utilizing 39 Suzaku mapping observation data from Vela Jr., a significant hard X-ray emission is detected with the hard X-ray detector (HXD) from the north-west TeV-emitting region. The X-ray spectrum is well reproduced by a single power-law model with the photon index of 3.15${}_{-1.14}^{+1.18}$ in the 12--22 keV band. Compiling this with the soft X-ray spectrum simultaneously observed with the X-ray imaging spectrometer (XIS) onboard Suzaku, we find that the wide-band X-ray spectrum in the 2--22 keV band is reproduced with a single power-law or concave broken power-law model, which are statistically consistent with each other. Whichever the model of a single or broken power-law is appropriate, clearly the spectrum has no rolloff structure. Applying this result to the method introduced in \citet{yama2014}, we find that one-zone synchrotron model with electron spectrum having a power-law plus exponential cutoff may not be applicable to Vela Jr.

arXiv comment20 pages, 7 figures, 4 tables, accepted for publication in PASJ

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Cited by in corpus (8)

• Deeper H.E.S.S. observations of Vela Junior (RX J0852.0$-$4622): Morphology studies and resolved spectroscopy
• A detailed study of the interstellar protons toward the TeV $\gamma$-ray SNR RX J0852.0$-$4622 (G266.2$-$1.2, Vela Jr.); a third case of the $\gamma$-rays and ISM spatial correspondence
• Modeling of the spatially resolved non-thermal emission from the Vela Jr. supernova remnant
• Detection of GeV Gamma-rays from HESS J1534-571 and Multiwavelength Implications for the Origin of the Non-thermal Emission
• SRG/eROSITA and XMM-Newton observations of Vela Jr
• Absorption Line Observations of H${}_3^{+}$ and CO in Sight Lines Toward the Vela and W28 Supernova Remnants
• Detection of the hard X-ray non-thermal emission from Kepler's supernova remnant
• High energy gamma-ray detection of supernova remnants in the Large Magellanic Cloud