FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2953270715> ?p ?o ?g. }

• W2953270715 endingPage "A146" @default.
• W2953270715 startingPage "A146" @default.
• W2953270715 abstract "Gamma-ray detected radio-loud narrow-line Seyfert 1 (g-NLS1) galaxies constitute a small but interesting sample of the gamma-ray loud AGN. The radio-loudest g-NLS1 known, PKS 2004-447, is located in the southern hemisphere and is monitored in the radio regime by the multiwavelength monitoring program TANAMI. We aim for the first detailed study of the radio morphology and long-term radio spectral evolution of PKS 2004-447, which are essential to understand the diversity of the radio properties of g-NLS1s. The TANAMI VLBI monitoring program uses the Australian Long Baseline Array (LBA) and telescopes in Antarctica, Chile, New Zealand, and South Africa to monitor the jets of radio-loud active galaxies in the southern hemisphere. Lower resolution radio flux density measurements at multiple radio frequencies over four years of observations were obtained with the Australia Telescope Compact Array (ATCA). The TANAMI VLBI image at 8.4 GHz shows an extended one-sided jet with a dominant compact VLBI core. Its brightness temperature is consistent with equipartition, but it is an order of magnitude below other g-NLS1s with the sample value varying over two orders of magnitude. We find a compact morphology with a projected large-scale size <11 kpc and a persistent steep radio spectrum with moderate flux-density variability. PKS 2004-447 appears to be a unique member of the g-NLS1 sample. It exhibits blazar-like features, such as a flat featureless X-ray spectrum and a core dominated, one-sided parsec-scale jet with indications for relativistic beaming. However, the data also reveal properties atypical for blazars, such as a radio spectrum and large-scale size consistent with Compact-Steep-Spectrum (CSS) objects, which are usually associated with young radio sources. These characteristics are unique among all g-NLS1s and extremely rare among gamma-ray loud AGN." @default.
• W2953270715 created "2019-06-27" @default.
• W2953270715 creator A5009477826 @default.
• W2953270715 creator A5014199228 @default.
• W2953270715 creator A5015202355 @default.
• W2953270715 creator A5018740566 @default.
• W2953270715 creator A5027612126 @default.
• W2953270715 creator A5027977193 @default.
• W2953270715 creator A5030506173 @default.
• W2953270715 creator A5042161585 @default.
• W2953270715 creator A5049628687 @default.
• W2953270715 creator A5056052826 @default.
• W2953270715 creator A5057403698 @default.
• W2953270715 creator A5058986771 @default.
• W2953270715 creator A5060064628 @default.
• W2953270715 creator A5060291543 @default.
• W2953270715 creator A5066377917 @default.
• W2953270715 creator A5066832234 @default.
• W2953270715 creator A5068757764 @default.
• W2953270715 creator A5072873148 @default.
• W2953270715 creator A5073524066 @default.
• W2953270715 creator A5073816424 @default.
• W2953270715 creator A5085836400 @default.
• W2953270715 creator A5091873580 @default.
• W2953270715 creator A5091906254 @default.
• W2953270715 date "2016-04-01" @default.
• W2953270715 modified "2023-10-09" @default.
• W2953270715 title "The gamma-ray emitting radio-loud narrow-line Seyfert 1 galaxy PKS 2004−447" @default.
• W2953270715 cites W1559252181 @default.
• W2953270715 cites W1665346145 @default.
• W2953270715 cites W1767676977 @default.
• W2953270715 cites W1809848373 @default.
• W2953270715 cites W1880209652 @default.
• W2953270715 cites W1891583834 @default.
• W2953270715 cites W1921665002 @default.
• W2953270715 cites W1966577786 @default.
• W2953270715 cites W1971253310 @default.
• W2953270715 cites W1973976044 @default.
• W2953270715 cites W1976414431 @default.
• W2953270715 cites W1977251607 @default.
• W2953270715 cites W1979115990 @default.
• W2953270715 cites W1989158958 @default.
• W2953270715 cites W1990311414 @default.
• W2953270715 cites W2001955524 @default.
• W2953270715 cites W2014234480 @default.
• W2953270715 cites W2017895096 @default.
• W2953270715 cites W2025903450 @default.
• W2953270715 cites W2030161279 @default.
• W2953270715 cites W2031856523 @default.
• W2953270715 cites W2034695045 @default.
• W2953270715 cites W2037687557 @default.
• W2953270715 cites W2038189851 @default.
• W2953270715 cites W2048001081 @default.
• W2953270715 cites W2055069191 @default.
• W2953270715 cites W2063958326 @default.
• W2953270715 cites W2065603345 @default.
• W2953270715 cites W2069480844 @default.
• W2953270715 cites W2070767271 @default.
• W2953270715 cites W2081906145 @default.
• W2953270715 cites W2082645841 @default.
• W2953270715 cites W2097199429 @default.
• W2953270715 cites W2108678928 @default.
• W2953270715 cites W2112180325 @default.
• W2953270715 cites W2114140598 @default.
• W2953270715 cites W2115552384 @default.
• W2953270715 cites W2125165939 @default.
• W2953270715 cites W2127588784 @default.
• W2953270715 cites W2129887144 @default.
• W2953270715 cites W2138204314 @default.
• W2953270715 cites W2144696109 @default.
• W2953270715 cites W2150586568 @default.
• W2953270715 cites W2152975971 @default.
• W2953270715 cites W2161486003 @default.
• W2953270715 cites W2167277890 @default.
• W2953270715 cites W2215012463 @default.
• W2953270715 cites W2235030509 @default.
• W2953270715 cites W3038064033 @default.
• W2953270715 cites W3098294656 @default.
• W2953270715 cites W3098310865 @default.
• W2953270715 cites W3099439273 @default.
• W2953270715 cites W3101036847 @default.
• W2953270715 cites W3101168514 @default.
• W2953270715 cites W3101260641 @default.
• W2953270715 cites W3102065722 @default.
• W2953270715 cites W3102501774 @default.
• W2953270715 cites W3102636058 @default.
• W2953270715 cites W3102723812 @default.
• W2953270715 cites W3102927736 @default.
• W2953270715 cites W3103109200 @default.
• W2953270715 cites W3103919098 @default.
• W2953270715 cites W3104322259 @default.
• W2953270715 cites W3104843192 @default.
• W2953270715 cites W3105795135 @default.
• W2953270715 cites W3106015352 @default.
• W2953270715 cites W3106228867 @default.
• W2953270715 cites W3121536294 @default.
• W2953270715 cites W4298316450 @default.
• W2953270715 cites W4299302016 @default.

• next