SDSS J094635.06+101706.1: a redshift one, very radio-loud, γ-ray emitting narrow-line Seyfert 1 galaxy
Komossa, S.; Yuan, Weimin; Yi, Weimin; Zhou, Hongyan; Liu, Wen-Juan; Yao, Su; Wu, Xue-Bing
China, Germany, United States
Abstract
As hybrids of narrow-line Seyfert 1 (NLS1) galaxies and blazars, γ-ray emitting NLS1s are important probes of jet physics in the high Eddington-ratio regime. Only very few of them are known to date; the majority of them below redshift z = 0.5. Here, we present the identification of the γ-ray emitting AGN TXS 0943+105 (SDSS J094635.06+101706.1) as a high-redshift NLS1 galaxy. It turns out to be one of the radio-loudest NLS1s known, highly variable at all wavelengths, and shows widely extended radio emission at a (projected) >100 kpc scale. It is a known strong γ-ray emitter with a luminous flare reported previously. At redshift z = 1.004, this is the most distant γ-NLS1 known to date.