X-ray and radio observations of the poor cluster A3581 which hosts the radio galaxy PKS 1404 − 267 |
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| Authors: | R M Johnstone A C Fabian & G B Taylor |
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| Institution: | Institute of Astronomy, Madingley Road, Cambridge CB3 0HA,;NRAO, Socorro, NM 87801, USA |
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| Abstract: | We present new X-ray and H I 21-cm data on the poor cluster of galaxies Abell 3581. The ASCA spectrum requires a low temperature, has a strong requirement for excess absorption and shows evidence for multi-temperature components. The ROSAT HRI image shows the strongly peaked emission indicative of a cooling flow. Despite the low temperature (～ 1.5–2.0 keV) and low luminosity (～ 2 × 1042 erg s?1 in the 2–10 keV band), Abell 3581 has a mass deposition rate ～ 80 M⊙ yr?1 which is larger than found for other nearby low-luminosity objects. VLA observations in the 21-cm band set velocity width and spin temperature dependent limits on the column density of atomic hydrogen. |
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| Keywords: | galaxies: clusters: individual: A3581 cooling flows galaxies: individual: PKS 1404 ? 267 radio lines: galaxies X-rays: galaxies |
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