论文标题
发现了最后9 Gyr的最亮的类星体
Discovery of the most luminous quasar of the last 9 Gyr
论文作者
论文摘要
我们报告了一个明亮的（g = 14.5 mag（ab），k = 11.9 mag（vega））quasar在redshift z = 0.83处 - 在z> 0.4处的光学上最亮（未打开的）类星体。 SMSS J11447.77-430859.3在银河纬度为b = +18.1deg的银河纬度上，在寻找共生二进制恒星期间，通过Skymapper Southern Survey（SMSS）的光学颜色从Skymapper Southern Survey（SMSS）中鉴定出来。光学和近红外光谱揭示了广泛的MGII，H-BETA，H-Alpha和Pa-Beta发射线，我们从中测量了Log10的黑洞质量（M_BH/M_SUN）= 9.4 +/- 0.5。 L_BOL =（4.7 +/- 1.0） * 10^47 erg/s或m_i（z = 2）= -29.74 mag（ab），我们估计Eddington比率为〜1.4。作为在宇宙历史的最后一个〜9的回旋中，最具发光的类星体，其光度大于3C 273倍，源提供了一系列潜在的后续机会。
We report the discovery of a bright (g = 14.5 mag (AB), K = 11.9 mag (Vega)) quasar at redshift z = 0.83 -- the optically brightest (unbeamed) quasar at z > 0.4. SMSS J114447.77-430859.3, at a Galactic latitude of b = +18.1deg, was identified by its optical colours from the SkyMapper Southern Survey (SMSS) during a search for symbiotic binary stars. Optical and near-infrared spectroscopy reveals broad MgII, H-beta, H-alpha, and Pa-beta emission lines, from which we measure a black hole mass of log10(M_BH/M_Sun) = 9.4 +/- 0.5. With its high luminosity, L_bol = (4.7 +/- 1.0) * 10^47 erg/s or M_i(z=2) = -29.74 mag (AB), we estimate an Eddington ratio of ~1.4. As the most luminous quasar known over the last ~9 Gyr of cosmic history, having a luminosity 8 times greater than 3C 273, the source offers a range of potential follow-up opportunities.
