论文标题
SDSS J1058+5443：蓝色类星体没有光学/NUV宽发射线
SDSS J1058+5443: A blue quasar does not have optical/NUV broad emission lines
论文作者
论文摘要
在手稿中，蓝色类星体SDSS J105816.19+544310.2（= SDSS J1058+5443）在RedShift 0.479据报道是So-So-Far是True-2类型的最佳候选，而中央Blrs消失了。关于真实2型AGN的存在，没有明确的结论，这主要是由于某些先前分类的真实2型AGN的候选者在高质量的光谱中被检测到的光宽发射线。 Here, not similar as previous reported candidates for true type-2 AGN among narrow emission-line galaxies with weak AGN activities but strong stellar lights, the definite blue quasar SDSS J1058+5443 can be well confirmed as a true type-2 quasar due to apparent quasar-shape blue continuum emissions but apparent loss of both the optical broad Balmer emission lines and the NUV broad Mg~{\sc ii} emission 线。在考虑了蓝移光学和UV Fe〜 {\ sc ii}排放之后，基于不同的模型函数和F检验统计技术，没有明显的光学balmer发射线和/或广泛的NUV mg〜 {\ sc ii}线，并且置信水平小于1sigma以支持宽光光学和NUV。此外，假定对宽线发射云的病毒化假设，重建的宽发射线强烈表明，如果有的话，可能会在SDSS的SDSS频谱中隐藏或不知所措的可能的固有宽发射线。因此，SDSS J1058+5443是True-2类型的最佳且强大的候选者，这是对真正2型AGN的存在的进一步明确结论。
In the manuscript, the blue quasar SDSS J105816.19+544310.2 (=SDSS J1058+5443) at redshift 0.479 is reported as so-far the best candidate of true type-2 quasar with disappearance of central BLRs. There are so-far no definite conclusions on the very existence of true type-2 AGN, mainly due to detected optical broad emission lines in high quality spectra of some previously classified candidates of true type-2 AGN. Here, not similar as previous reported candidates for true type-2 AGN among narrow emission-line galaxies with weak AGN activities but strong stellar lights, the definite blue quasar SDSS J1058+5443 can be well confirmed as a true type-2 quasar due to apparent quasar-shape blue continuum emissions but apparent loss of both the optical broad Balmer emission lines and the NUV broad Mg~{\sc ii} emission line. Based on different model functions and F-test statistical technique, after considering blue-shifted optical and UV Fe~{\sc ii} emissions, there are no apparent broad optical Balmer emission lines and/or broad NUV Mg~{\sc ii} line, and the confidence level is smaller than 1sigma to support broad optical and NUV emission lines. Moreover, assumed the Virialization assumption to broad line emission clouds, the re-constructed broad emission lines strongly indicate that the probable intrinsic broad emission lines, if there were, cannot be hidden or overwhelmed in the noises of SDSS spectrum of SDSS J1058+5443. Therefore, SDSS J1058+5443, so-far the best and robust candidate of true type-2 quasar, leads to the further clear conclusion on the very existence of true type-2 AGN.
