English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We present an analysis of BeppoSAX observations of the IC1262 galaxy clusterand report the first temperature and abundance measurements, along withpreliminary indications of diffuse, nonthermal emission. By fitting a 6' (~360h_50^-1 kpc) region with a single Mewe-Kaastra-Liedahl model with photoelectricabsorption, we find a temperature of 2.1 - 2.3 keV, and abundance of 0.45 -0.77 (both 90% confidence). We find the addition of a power-law componentprovides a statistically significant improvement (F-test = 90%) to the fit. Theaddition of a second thermal component also improves the fit but we argue thatit is physically implausible. The power-law component has a photon index(Gamma_X) of 0.4 - 2.8 and a nonthermal flux of (4.1 - 56.7) x 10-5 photonscm^-2 s^-1 over the 1.5 - 10.5 keV range in the Medium Energy Concentratorspectrometer detector. An unidentified X-ray source found in the ROSAT HighResolution Imager observation (~0'.9 from the center of the cluster) is apossible explanation for the nonthermal flux; however, additional evidence ofdiffuse, nonthermal emission comes from the NRAO VLA Sky Survey and theWesterbork Northern Sky Survey radio measurements, in which excess diffuse,radio flux is observed after point-source subtraction. The radio excess can befitted to a simple power law with a spectral index of ~1.8, which is consistentwith the nonthermal X-ray emission spectral index. The steep spectrum istypical of diffuse emission and the size of the radio source implies that it islarger than the cD galaxy and not due to a discreet source

ABeppoSAXObservation of the IC 1262 Galaxy Cluster