JWST UNCOVER: Extremely Red and Compact Object at z phot ≃ 7.6 Triply Imaged by A2744
The Astrophysical Journal, 2023 Recent JWST/NIRCam imaging taken for the ultra-deep UNCOVER program reveals a very red dropout object at z _phot ≃ 7.6, triply imaged by the galaxy cluster A2744 ( z _d = 0.308).
Lukas J. Furtak +31 more
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Compact jets dominate the continuum emission in low-luminosity active galactic nuclei
Astronomy & Astrophysics, 2023 Low-luminosity active galactic nuclei (LLAGN) are special among their kind due to the profound structural changes that the central engine experiences at low accretion rates (≲ 10−3 in Eddington units). The disappearance of the accretion disc – the blue bump – leaves behind a faint optical nuclear continuum whose nature has been largely debated. This is
Fernández-Ontiveros, J. A. +2 more
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Mid-infrared Properties of Narrow-line Seyfert 1 Galaxies Detected by LoTSS DR2
The Astrophysical JournalNarrow-line Seyfert 1 galaxies (NLS1s), a subclass of active galactic nuclei (AGNs) in an early stage of the accretion process, are also found to host relativistic jets. However, currently known jetted NLS1s are rare. The majority of NLS1s are undetected
Xu-Liang Fan
doaj +1 more source
Searching for Radio Outflows from M31* with VLBI Observations
The Astrophysical Journal, 2023 As one of the nearest and most dormant supermassive black holes (SMBHs), M31* provides a rare but promising opportunity for studying the physics of black hole accretion and feedback at the quiescent state. Previous Karl G.
Sijia Peng +5 more
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Evidence of a Forming Nucleus in the Fourcade–Figueroa Galaxy
The Astrophysical JournalWe analyze data from the IRAS, Wide-field Infrared Survey Explorer, and Planck satellites, revealing an unresolved dust condensation at the center of the Fourcade–Figueroa galaxy (ESO270-G017), which may correspond to a forming nucleus.
H. Dottori, R. J. Díaz
doaj +1 more source
Investigating Model Dependencies for Obscured Active Galactic Nuclei: A Case Study of NGC 3982
The Astrophysical JournalX-ray spectroscopy of heavily obscured active galactic nuclei (AGN) offers a unique opportunity to study the circumnuclear environment of accreting supermassive black holes.
Kristína Kallová +2 more
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Revealing the Accretion Flow in M87*: Insights from Faraday Rotation
The Astrophysical JournalThe Faraday rotation measure (RM) is a commonly used tool to trace electron number density and magnetic fields in hot accretion flows, particularly in low-luminosity accreting supermassive black holes.
Constanza Echiburú-Trujillo +1 more
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The Structure Function of Mid-infrared Variability in Low-redshift Active Galactic Nuclei
The Astrophysical Journal, 2023 Using the multi-epoch mid-infrared (MIR) photometry from the Wide-field Infrared Survey Explorer spanning a baseline of ∼10 yr, we extensively investigate the MIR variability of nearby active galactic nuclei (AGNs) at 0.15 < z < 0.4.
Suyeon Son, Minjin Kim, Luis C. Ho
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Questions and challenges of what powers galactic outflows in active galactic nuclei [PDF]
, 2018 Different mechanisms can drive outflows in active galactic nuclei (AGN), but it is often unclear which mechanism dominates, if any. To quantify the impact of AGN feedback on galaxy evolution, the driving mechanism of outflows must be better understood.
arxiv +1 more source
STUDY OF SWIFT/BAT SELECTED LOW-LUMINOSITY ACTIVE GALACTIC NUCLEI OBSERVED WITH SUZAKU [PDF]
The Astrophysical Journal, 2016 ABSTRACT We systematically analyze the broadband (0.5–200 keV) X-ray spectra of hard X-ray (>10 keV) selected local low-luminosity active galactic nuclei (LLAGNs) observed with Suzaku and Swift/BAT. The sample consists of 10 LLAGNs detected with Swift/BAT with intrinsic 14–195 keV luminosities smaller than 1042 erg s−1 available in ...
Taiki Kawamuro +4 more
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