Results 161 to 170 of about 80,758 (270)

On the Extended Soft X-Ray and Fe Kα Emission in NGC 1068

open access: yesThe Astrophysical Journal
The soft X-ray excess and Fe K α emission lines are widely observed in Seyfert galaxies, with their origin still in debate. We present a detailed spatially resolved image and spectral analysis of the Seyfert 2 galaxy NGC 1068 using high-resolution ...
Songbo Gao, Hongxing Yin, Shaoming Hu
doaj   +1 more source

JWST NIRCam Imaging of NGC 4258. I. Observation Overview

open access: yesThe Astrophysical Journal
We present James Webb Space Telescope (JWST) Near-Infrared Camera imaging of the nearby Seyfert 1.9 galaxy NGC 4258, which hosts strong star formation regions as well as an anomalous jet-like radio structure that extends through a significant portion of ...
Travis C. Fischer   +5 more
doaj   +1 more source

Accretion-modified Stars in Accretion Disks of Active Galactic Nuclei: Contribution to Active Galactic Nuclei Disk Viscosity

open access: yesThe Astrophysical Journal
It is widely believed that stellar-mass black holes (sMBHs) exist within the accretion disks of active galactic nuclei (AGN), forming a distinct population termed “accretion-modified star” (AMS).
Jun-Rong Liu, Jian-Min Wang, Hua Feng
doaj   +1 more source

On the Extremely X-Ray Variable Active Galactic Nuclei in the XMM-LSS Field

open access: yesThe Astrophysical Journal
We present a systematic investigation of extremely X-ray variable active galactic nuclei (AGNs) in the ≈5.3 deg ^2 XMM-SERVS XMM-LSS region. Eight variable AGNs are identified with rest-frame 2 keV flux density variability amplitudes around 6–12.
Zijian Zhang   +5 more
doaj   +1 more source

Beyond Earth, Beyond Time: Preserving Female Fertility in Space Missions. [PDF]

open access: yesJ Clin Med
Marin L   +4 more
europepmc   +1 more source

Energetic spectra from semi-implicit particle-in-cell simulations of magnetic reconnection. [PDF]

open access: yesSci Rep
Schoeffler KM   +4 more
europepmc   +1 more source

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