Exploring the dust content of galactic haloes with <i>Herschel</i> – IV. NGC 3079

ABSTRACT We present the results from an analysis of deep Herschel far-infrared (far-IR) observations edge-on disc galaxy NGC 3079. The point spread function-cleaned Photodetector Array Camera and Spectrometer (PACS) images at 100 160 µm display a 25 × kpc2 X-shape structure centred on nucleus that is similar in extent orientation to seen H ?, X-rays, far-ultraviolet. One dusty filaments making up this detected Spectral Photometric Imaging Receiver 250 map out ?25 kpc nucleus. match between far-IR those other wavelengths suggests material has been lifted by same large-scale galactic wind produced structures object. A closer look central 10 region provides additional support for scenario. dust temperatures traced 100–160 flux ratios are enhanced within biconical active nucleus, aligned along minor axis galaxy, coincident with well-known double-lobed cm-wave radio ?–X-ray nuclear superbubbles. PACS imaging spectroscopy inner 6 reveals broad [C ii] 158 emission line profiles OH 79 absorption features widths well excess expected beam smearing rotational motion. This compelling evidence cool directly interacts ionized relativistic outflows X-ray, emission.