A New Candidate of an X-Ray Luminous Cluster of Galaxies behind the Galactic Plane

作者：Yamauchi Shigeo^*; Bamba Aya; Koyama Katsuji

来源：Publications of the Astronomical Society of Japan, 2011, 63: S957-S961.

• galaxies: intergalactic medium
• X-rays: galaxies: clusters
• X-rays: individual (AX J185905+0333)

We present Suzaku results of an X-ray source, AX J185905+0333, discovered in the ASCA galactic plane survey. The radial profile of AX J185905+0333 is larger than that of the point-spread function. No intensity variation was found during the observation. These facts indicate that AX J185905+0333 is an extended source. A large low-energy absorption, equivalent to N(H) of (8-10) x 10(22)cm(-2), was found, which supports that AX J185905+0333 is an extragalactic object behind the galactic plane. The X-ray spectrum exhibits a clear emission line at 4.82 keV, and is represented by a thin-thermal plasma model of 6.6 keV temperature with a redshift of 0.391. Then, the X-ray luminosity was calculated to be 2.7 x 10(45) erg s(-1). These results strongly support that AX J185905+0333 is an X-ray luminous cluster of galaxies behind the galactic plane.

• 出版日期2011