DECOMPOSITION OF A BETA-1-PHASE CU-AL-NI ALLOY AT ELEVATED-TEMPERATURE


DVORACK M., KUWANO N., POLAT Ş. , CHEN H., WAYMAN C.

SCRIPTA METALLURGICA, vol.17, no.11, pp.1333-1336, 1983 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 17 Issue: 11
  • Publication Date: 1983
  • Doi Number: 10.1016/0036-9748(83)90227-2
  • Title of Journal : SCRIPTA METALLURGICA
  • Page Numbers: pp.1333-1336

Abstract

We present Gemini optical imaging and spectroscopy of the radio source J 133658.3-295105. This source has been suggested to be the core of an FR II radio source with two detected lobes. J 133658.3-295105 and its lobes are aligned with the optical nucleus of M 83 and with three other radio sources at the M 83 bulge outer region. These radio sources are neither supernova remnants nor H II regions. This curious configuration prompted us to try to determine the distance to J 133658.3-295105. We detected H_alpha emission redshifted by ~ 130 km s^-1 with respect to an M 83 H II region 2.5" east-southeast of the radio source. We do not detect other redshifted emission lines of an optical counterpart down to m_i = 22.2 +/- 0.8. Two different scenarios are proposed: the radio source is at z >= 2.5, a much larger distance than the previously proposed lower limit z >= 1.0, or the object was ejected by a gravitational recoil event from the M 83 nucleus. This nucleus is undergoing a strong dynamical evolution, judging from previous three-dimensional spectroscopy.