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The galaxy NGC1512 is interacting with the smaller galaxy NGC1510 and shows apeculiar morphology, characterised by two extended arms immersed in an HI discwhose size is about four times larger than the optical diameter of NGC1512. Forthe first time we performed a deep X-ray observation of the galaxies NGC1512and NGC1510 with XMM-Newton to gain information on the population of X-raysources and diffuse emission in a system of interacting galaxies. We identifiedand classified the sources detected in the XMM-Newton field of view by means ofspectral analysis, hardness-ratios calculated with a Bayesian method, X-rayvariability, and cross-correlations with catalogues in optical, infrared, andradio wavelengths. We also made use of archival Swift (X-ray) and AustraliaTelescope Compact Array (radio) data to better constrain the nature of thesources detected with XMM-Newton. We detected 106 sources in the energy rangeof 0.2-12 keV, out of which 15 are located within the D_25 regions of NGC1512and NGC1510 and at least six sources coincide with the extended arms. Weidentified and classified six background objects and six foreground stars. Wediscussed the nature of a source within the D_25 ellipse of NGC1512, whoseproperties indicate a quasi-stellar object or an intermediate ultra-luminousX-ray source. Taking into account the contribution of low-mass X-ray binariesand active galactic nuclei, the number of high-mass X-ray binaries detectedwithin the D_25 region of NGC1512 is consistent with the star formation rateobtained in previous works based on radio, infrared optical, and UVwavelengths. We detected diffuse X-ray emission from the interior region ofNGC1512 with a plasma temperature of kT=0.68(0.31-0.87) keV and a 0.3-10 keVX-ray luminosity of 1.3E38 erg/s, after correcting for unresolved discretesources.

XMM-Newton observation of the interacting galaxies NGC1512 and NGC1510