Astrophys. J., 818, 63 (2016/February-2)
Discovery of X-ray emission from the galactic supernova remnant G32.8-0.1 with Suzaku.
BAMBA A., TERADA Y., HEWITT J., PETRE R., ANGELINI L., SAFI-HARB S., ZHOU P., BOCCHINO F. and SAWADA M.
Abstract (from CDS):
We present the first dedicated X-ray study of the supernova remnant (SNR) G32.8-0.1 (Kes 78) with Suzaku. X-ray emission from the whole SNR shell has been detected for the first time. The X-ray morphology is well correlated with the emission from the radio shell, while anti-correlated with the molecular cloud found in the SNR field. The X-ray spectrum shows not only conventional low-temperature (kT ∼ 0.6 keV) thermal emission in a non-equilibrium ionization state, but also a very high-temperature (kT ∼ 3.4 keV) component with a very low ionization timescale (∼2.7x109/cm3 s), or a hard nonthermal component with a photon index Γ ∼ 2.3. The average density of the low-temperature plasma is rather low, of the order of 10–3-10–2/cm3, implying that this SNR is expanding into a low-density cavity. We discuss the X-ray emission of the SNR, also detected in TeV with H.E.S.S., together with multi-wavelength studies of the remnant and other gamma-ray emitting SNRs, such as W28 and RCW 86. Analysis of a time-variable source, 2XMM J185114.3-000004, found in the northern part of the SNR, is also reported for the first time. Rapid time variability and a heavily absorbed hard-X-ray spectrum suggest that this source could be a new supergiant fast X-ray transient.
ISM: individual: (G32.8-0.1, Kes 78) - ISM: supernova remnants - stars: individual: 2XMM J185114.3-000004 - stars: neutron - X-rays: ISM
View the reference in ADS
To bookmark this query, right click on this link: simbad:2016ApJ...818...63B and select 'bookmark this link' or equivalent in the popup menu