登录 | 注册 | 中文  | English  | 用时: 0.84s
元数据
高级检索
首页 > 中国极地考察知识库 > 成果信息库 > 已审查 Identification of a new γ-ray-emitting narrow-line Seyfert 1 galaxy, at redshift ̃1

Identification of a new γ-ray-emitting narrow-line Seyfert 1 galaxy, at redshift ̃1

【标题】Identification of a new γ-ray-emitting narrow-line Seyfert 1 galaxy, at redshift ̃1

【Title】Identification of a new γ-ray-emitting narrow-line Seyfert 1 galaxy, at redshift ̃1

【DOI】10.1093/mnrasl/slv119

【作者】

【Author】

【期刊】Monthly Notices of the Royal Astronomical Society

【Journal】

【期刊年份】2015

【卷】454

【期】1

【关键词】 galaxies: active; galaxies: jets; galaxies: nuclei; quasars: individual: SDSS J122222.55+041315.7

【Keywords】 galaxies: active; galaxies: jets; galaxies: nuclei; quasars: individual: SDSS J122222.55+041315.7

【摘要】We report on the identification of a new γ-ray-emitting narrow-line Seyfert 1 (NLS1) galaxy, SDSS J122222.55+041315.7, which increases the number of known objects of this remarkable but rare type of active galactic nuclei to seven. Its optical spectrum, obtained in the Sloan Digital Sky Survey-Baryon Oscillation Spectroscopic Survey, reveals a broad H β emission line with a width (FWHM) of 1734 ± 104 km s-1. This, along with strong optical Fe II multiplets [R4570 = 0.9] and a weak [O III] λ5007 emission line, makes the object a typical NLS1. On the other hand, the source exhibits a high radio brightness temperature, rapid infrared variability, and a flat X-ray spectrum extending up to ̃200 keV. It is associated with a luminous γ-ray source detected significantly with Fermi/LAT. Correlated variability with other wavebands has not yet been tested. The spectral energy distribution can be well modelled by a one-zone leptonic jet model. This new member is by far the most distant γ-ray-emitting NLS1, at a redshift of z = 0.966.

【Abstract】We report on the identification of a new γ-ray-emitting narrow-line Seyfert 1 (NLS1) galaxy, SDSS J122222.55+041315.7, which increases the number of known objects of this remarkable but rare type of active galactic nuclei to seven. Its optical spectrum, obtained in the Sloan Digital Sky Survey-Baryon Oscillation Spectroscopic Survey, reveals a broad H β emission line with a width (FWHM) of 1734 ± 104 km s-1. This, along with strong optical Fe II multiplets [R4570 = 0.9] and a weak [O III] λ5007 emission line, makes the object a typical NLS1. On the other hand, the source exhibits a high radio brightness temperature, rapid infrared variability, and a flat X-ray spectrum extending up to ̃200 keV. It is associated with a luminous γ-ray source detected significantly with Fermi/LAT. Correlated variability with other wavebands has not yet been tested. The spectral energy distribution can be well modelled by a one-zone leptonic jet model. This new member is by far the most distant γ-ray-emitting NLS1, at a redshift of z = 0.966.

【基金/项目】 NSFC grant no. 11473035, 11303046, 11273027 ; the Strategic Priority Research Program “The Emergence of Cosmological Structures” of the CAS (grant no. XDB09000000)

【下载】 PDF(271.3 KB)