تقرير
Radio Galaxy Zoo: discovery of a poor cluster through a giant wide-angle tail radio galaxy
| العنوان: | Radio Galaxy Zoo: discovery of a poor cluster through a giant wide-angle tail radio galaxy |
|---|---|
| المؤلفون: | Banfield, J. K., Andernach, H., Kapinska, A. D., Rudnick, L., Hardcastle, M. J., Cotter, G., Vaughan, S., Jones, T. W., Heywood, I., Wing, J. D., Wong, O. I., Matorny, T., Terentev, I. A., Lopez-Sanchez, A. R., Norris, R. P., Seymour, N., Shabala, S. S., Willett, K. W. |
| المصدر: | MNRAS, 460, 2376 - 2384 (2016) |
| سنة النشر: | 2016 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies |
| الوصف: | We have discovered a previously unreported poor cluster of galaxies (RGZ-CL J0823.2+0333) through an unusual giant wide-angle tail radio galaxy found in the Radio Galaxy Zoo project. We obtained a spectroscopic redshift of $z=0.0897$ for the E0-type host galaxy, 2MASX J08231289+0333016, leading to M$_r = -22.6$ and a $1.4\,$GHz radio luminosity density of $L_{\rm 1.4} = 5.5\times10^{24}$ W Hz$^{-1}$. These radio and optical luminosities are typical for wide-angle tailed radio galaxies near the borderline between Fanaroff-Riley (FR) classes I and II. The projected largest angular size of $\approx8\,$arcmin corresponds to $800\,$kpc and the full length of the source along the curved jets/trails is $1.1\,$Mpc in projection. X-ray data from the XMM-Newton archive yield an upper limit on the X-ray luminosity of the thermal emission surrounding RGZ J082312.9+033301,at $1.2-2.6\times10^{43}$ erg s$^{-1}$ for assumed intra-cluster medium temperatures of $1.0-5.0\,$keV. Our analysis of the environment surrounding RGZ J082312.9+033301 indicates that RGZ J082312.9+033301 lies within a poor cluster. The observed radio morphology suggests that (a) the host galaxy is moving at a significant velocity with respect to an ambient medium like that of at least a poor cluster, and that (b) the source may have had two ignition events of the active galactic nucleus with $10^7\,$yrs in between. This reinforces the idea that an association between RGZ J082312.9+033301, and the newly discovered poor cluster exists. Comment: Published in MNRAS |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1093/mnras/stw1067 |
| URL الوصول: | http://arxiv.org/abs/1606.05016 |
| رقم الأكسشن: | edsarx.1606.05016 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1093/mnras/stw1067 |
|---|