Spectroscopic confirmation of the radio-loud quasar at z~7

Ekaterina Koptelova^1*, Chorng-Yuan Hwang¹

¹Graduate Institute of Astronomy, National Central University, Taoyuan, Taiwan

* Presenter:Ekaterina Koptelova, email:koptelova@astro.ncu.edu.tw

By matching the PS1, UKIDSS, and WISE catalogs of point sources with the FIRST survey catalog of 1.4 GHz radio sources, we found a high-redshift radio-loud quasar at redshift z~7, which is the most distant radio-loud quasar known today. We will present the near-infrared spectrum of this quasar between 0.8 and 2.5 microns and discuss its spectral properties in comparison with those of the known high-redshift broad line and radio-loud quasars. The existence of a radio-loud quasar at z~7 is unusual and may provide new insights on the co-evolution of supermassive black holes and their host galaxies at early epochs.

Keywords: high-redshift quasars, supermassive black holes, observational cosmology