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New type of extragalactic objects?

机译:新型河外物体?

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We have reported the discovery of a population of the normal extragalactic field galaxies with the clear presence of strong FHIL (forbidden high by ionized lines) and HeII 4686 emission. In this paper we present a dozen of them extracted from the SDSS dr7. The high resolution spectra 0.86 ? /px obtained with the 6-m telescope of the Special Astrophysical observatory of Russia are introduced for one of them, SDSS J093801. 63 + 135317.0 confirming the presence of strong and wide FHIL and HeII 4686 emission. These objects show typical narrow (FWHM ~ 120 - 250 km s~(-1)) emission lines both of HI and forbidden emission lines of [NII] 6548/84, [SII] 6717/31, [OI] 6300, [OII] 3727, and [OIII] 5007/4959 with underlying stellar absorption lines, coupled with the strong FHIL emission of [FeVII] 5721, 6087, [FeX] 6375, [FeXI] 7892, [FeXIV] 5303, and HeII 4686, sometimes very broad up to 1500 km s~(-1). Following the direct images, all morphological types are introduced, spherical, elliptical, spiral, barred spiral, etc., without morphological or other peculiarity and any signs of "standard" AGN activity. None of them are X-ray source. The appearance of the FHIL emission in normal galaxies (the objects of SBN/HII/ELG spectral types) might be one of the important sign of the beginning of the AGN activity. The existence of the numerous normal extragalactic objects with FHIL and HeII 4686 emission tell us that the link between the AGNs and the normal galaxies perhaps might be realized with the FHIL flare in normal galaxies. For all of them, the existence of the nonthermal source in normal galaxies should be proposed.
机译:我们已经报告发现了正常的河外星系星系群,并且明显存在强FHIL(被电离线禁止高射电)和HeII 4686发射。在本文中,我们介绍了从SDSS dr7中提取的十几种方法。高分辨率光谱0.86?介绍了使用俄罗斯特​​殊天文台6米望远镜获得的/ px,其中之一是SDSS J093801。 63 + 135317.0确认存在强而宽的FHIL和HeII 4686发射。这些对象显示了HI和[NII] 6548/84,[SII] 6717/31,[OI] 6300,[OII]的HI和禁止发射线的典型窄(FWHM〜120-250 km s〜(-1))发射线],3727和[OIII] 5007/4959,以及下方的恒星吸收线,有时还具有[FeVII] 5721、6087,[FeX] 6375,[FeXI] 7892,[FeXIV] 5303和HeII 4686的强FHIL发射高达1500 km s〜(-1)。在直接图像之后,引入了所有形态类型,包括球形,椭圆形,螺旋形,条形螺旋形等,没有形态或其他特殊性,也没有任何“标准” AGN活性的迹象。它们都不是X射线源。正常星系(SBN / HII / ELG光谱类型的物体)中FHIL发射的出现可能是AGN活动开始的重要标志之一。大量具有FHIL和HeII 4686发射的正常河外物体的存在告诉我们,AGN与正常星系之间的联系也许可以通过正常星系中的FHIL耀斑来实现。对于所有这些,都应该提出正常星系中非热源的存在。

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