费米BL Lac的成像红移估计
Imaging Redshift Estimates for Fermi BL Lacs
摘要:
我们已经获得了BL Lacertae对象(BL Lacs)的WIYN和SOAR i'图像,并使用这些来检测或限制宿主星系的流量。在普通的标准烛光假设下,这些数据提供了红移的估计值或下限。我们的目标是一组高通量费米大面积望远镜(LAT)源的平谱射电对应物,灵敏的光谱观测表明它们是连续主导的BL Lac。在这个样本中,11个BL Lac中的5个产生了显着的宿主检测,标准烛光红移z=0.13-0.58。我们的估计和下限通常与其他红移估计一致,尽管我们对J 0543 -5532的z=0.374的估计意味着一个显着的亚发光宿主。
英文摘要:
We have obtained WIYN and SOAR i' images of BL Lacertae objects (BL Lacs) and used these to detect or constrain the flux of the host galaxy. Under common standard candle assumptions these data provide estimates of, or lower bounds on, the redshift. Our targets are a set of flat-spectrum radio counterparts of high flux Fermi Large Area Telescope (LAT) sources, with sensitive spectral observations showing them to be continuum-dominated BL Lacs. In this sample 5 of 11 BL Lacs yielded significant host detections, with standard candle redshifts z=0.13-0.58. Our estimates and lower bounds are generally in agreement with other redshifts estimates, although our z=0.374 estimate for J0543-5532 implies a significantly sub-luminous host.
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