The radio structure of the peculiar narrow-line Seyfert 1 galaxy candidate J1100+4421

K. É. Gabányi, S. Frey, Z. Paragi, E. Järvelä, T. Morokuma, T. An, M. Tanaka, I. Tar

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Abstract

Narrow-line Seyfert 1 galaxies (NLS1) are an intriguing subclass of active galactic nuclei. Their observed properties indicate low central black hole mass and high accretion rate. The extremely radio-loud NLS1 sources often show relativistic beaming and are usually regarded as younger counterparts of blazars. Recently, the object SDSS J110006.07+442144.3 was reported as a candidate NLS1 source. The characteristics of its dramatic optical flare indicated its jet-related origin. The spectral energy distribution of the object was similar to that of the γ-ray detected radio-loud NLS1, PMN J0948+0022. Our high-resolution European very long baseline interferometry network observations at 1.7 and 5 GHz revealed a compact core feature with a brightness temperature of ≳1010 K. Using the lowest brightness temperature value and assuming a moderate Lorentz factor of ∼9, the jet viewing angle is ≲26°. Archival Very Large Array data show a large-scale radio structure with a projected linear size of ∼150 kpc reminiscent of double-sided morphology.
Original languageEnglish
Pages (from-to)1554-1561
Number of pages8
JournalMonthly Notices of the Royal Astronomical Society
Volume473
Issue number2
DOIs
Publication statusPublished - 11 Jan 2018
MoE publication typeA1 Journal article-refereed

Keywords

  • Galaxies: active
  • Galaxies: individual: SDSS J110006.07+442144.3
  • Galaxies: Seyfert

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    Advanced Radio astronomy in Europe

    Tammi, J., Tornikoski, M. & Kallunki, J.

    01/01/201231/12/2016

    Project: EU: Framework programmes funding

    Novel Explorations Pushing Robust e-VLBI Services

    Kallunki, J. & Mujunen, A.

    01/07/201031/03/2014

    Project: EU: Framework programmes funding

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