TY - JOUR
T1 - Identification of a new γ-ray-emitting narrow-line Seyfert 1 galaxy, at redshift ~1
AU - Yao, Su
AU - Yuan, Weimin
AU - Zhou, Hongyan
AU - Komossa, S.
AU - Zhang, Jin
AU - Qiao, Erlin
AU - Liu, Bifang
N1 - Publisher Copyright:
© 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.
PY - 2015/9/14
Y1 - 2015/9/14
N2 - 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.
AB - 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.
KW - Galaxies: active
KW - Galaxies: jets
KW - Galaxies: nuclei
KW - Quasars: individual: SDSS J122222.55+041315.7
UR - https://www.scopus.com/pages/publications/84944892203
U2 - 10.1093/mnrasl/slv119
DO - 10.1093/mnrasl/slv119
M3 - Article
AN - SCOPUS:84944892203
SN - 1745-3925
VL - 454
SP - L16-L20
JO - Monthly Notices of the Royal Astronomical Society: Letters
JF - Monthly Notices of the Royal Astronomical Society: Letters
IS - 1
ER -