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  • Yang, XiaolongBeijing University of Technology,Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences (författare)

Radio Activity of Supermassive Black Holes with Extremely High Accretion Rates

  • Artikel/kapitelEngelska2020

Förlag, utgivningsår, omfång ...

  • 2020-12-04
  • American Astronomical Society,2020
  • electronicrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:research.chalmers.se:df64611d-a7b1-4481-a4d5-9ebf91dc3d90
  • https://research.chalmers.se/publication/521076URI
  • https://doi.org/10.3847/1538-4357/abb775DOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:art swepub-publicationtype
  • Ämneskategori:ref swepub-contenttype

Anmärkningar

  • Radio emission from the high- A nd super-Eddington accreting active galactic nuclei (AGNs) has various origins: A persistent jet, the magnetized corona, and the wind-like outflows. It is still unclear which is the leading mechanism responsible for the observed radio emission and how the radio emission is related to other characteristic parameters such as the Eddington ratio and black hole mass. In this paper, we present the 5 GHz Very Large Array (VLA) observational results of a sample of 25 extremely high Eddington accreting supermassive black holes (EESBHs, the Eddington ratio λ Edd close to or above 1) in narrow-line Seyfert 1 galaxies, among which 22 sources are detected. Most of the EESBHs show a compact radio structure from a few hundred parsecs to 1 kpc scale. We estimated the lowest star formation rate surface density required for producing the observed radio emission and found that it is higher than the largest value previously detected in circumnuclear starburst galaxies, implying that the radio emission is from the AGN activity. Along with a comparison sample, we find an overall inverse-λ Edd correlation ranging from sub-to super-Eddington ratios. The high-Eddington and mildly super-Eddington AGNs (-0.5 < log) have a radio-to-X-ray luminosity ratio L R/L X ∼ 10-5-10-4 and a steep radio spectrum, supporting that the radio emission is from transient ejecta (outflows) of corona; however, the jet contribution cannot be entirely ruled out. Our highly super-Eddington sources (log) have a flatter radio spectrum, along with its low radio luminosity: ; their radio emission is likely dominated by a magnetized corona, and a radiation-pressure-caused jet is also proposed in this paper.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Yao, SuChinese Academy of Sciences,Beijing University of Technology (författare)
  • Yang, Jun,1979Chalmers tekniska högskola,Chalmers University of Technology,Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences(Swepub:cth)junya (författare)
  • Ho, Luis C.Beijing University of Technology (författare)
  • An, T.Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences (författare)
  • Wang, RanBeijing University of Technology (författare)
  • Baan, Willem A.Chinese Academy of Sciences,Netherlands Institute for Radio Astronomy (ASTRON) (författare)
  • Gu, MinfengShanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences (författare)
  • Liu, XiangChinese Academy of Sciences (författare)
  • Yang, XiaofengChinese Academy of Sciences (författare)
  • Joshi, RaviBeijing University of Technology (författare)
  • Beijing University of TechnologyShanghai Astronomical Observatory. Chinese Academy of Sciences (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Astrophysical Journal: American Astronomical Society904:21538-43570004-637X

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