Results 141 to 150 of about 289,816 (297)
The `harder when brighter' X-ray behaviour of the low luminosity active galactic nucleus NGC 7213 [PDF]
, 2012 We present the first robust evidence of an anti-correlation between the X-ray photon index, \Gamma, and the X-ray luminosity in a single low luminosity active galactic nuclei (LLAGN), NGC 7213. Up to now, such anti-correlation trends have been seen only in large samples of LLAGN that span a wide range of X-ray fluxes, although the opposite behaviour (i.
arxiv +1 more source
, 2017 Based on the Chandra data archive as of March 2016, we have identified 314 candidate active galactic nuclei in 719 galaxies located closer than 50 Mpc, among them late-type (Hubble types Sc and later) galaxies that previously had been classified from ...
Feng, Hua, Ho, Luis C., She, Rui
core +2 more sources
Intrinsic disc emission and the soft X‐ray excess in active galactic nuclei [PDF]
, 2011 Narrow-line Seyfert 1 (NLS1) galaxies have low-mass black holes and mass accretion rates close to (or exceeding) Eddington, so a standard blackbody accretion disc should peak in the extreme ultraviolet. However, the lack of true absorption opacity in the
C. Done +4 more
semanticscholar +1 more source
Advanced Science, Volume 12, Issue 15, April 17, 2025.Magnetically augmented biohybrid cartilaginous microtissues enable remote microtissue motion control and assembly as well as targeted differentiation. This study demonstrates accelerated endochondral ossification under magnetic stimulation, highlighting cartilaginous assembloid constructs’ ability to retain long‐term magnetic properties.
Konstantinos Ioannidis +13 more
wiley +1 more source
The X-ray nature of the LINER nuclear sources [PDF]
arXiv, 2006 The analysis of the X-ray data for a sample of 51 LINER nuclei with available X-ray Chandra imaging is reported. Our aim was to investigate the physical mechanisms which power LINER nuclear activity. The use of multiwavelenght information at radio, UV, optical HST and X-ray lead us to conclude that at least 60% of the LINERs are hosting a low ...
arxiv
Transient X-ray Emission from Normal Galactic Nuclei
, 2007 X-ray transients appeared in optically non-active galactic nuclei have been observed in recent years. The most popular model explaining this kind of phenomena is the conventional tidal disruption model.
A. Y. L. Wong +39 more
core +1 more source
The Relationship of Hard X-Ray and Optical Line Emission in Low-Redshift Active Galactic Nuclei [PDF]
, 2005 In this paper we assess the relationship of the population of active galactic nuclei (AGNs) selected by hard X-rays to the traditional population of AGNs with strong optical emission lines. First, we study the emission-line properties of a new hard-X-ray-
T. Heckman +4 more
semanticscholar +1 more source
Geological Journal, Volume 60, Issue 4, Page 793-806, April 2025.This work documents how the texture and composition of metamorphic garnet represent a valuable petrological archive capable of deciphering complex thermobaric histories. ABSTRACT In the central sector of the Sanandaj‐Sirjan zone of Iran, the Triassic‐to‐Jurassic ‘Hamedan Phyllites’ metamorphic complex shows a polymetamorphic evolution characterised by ...
Mirmohammad Miri +4 more
wiley +1 more source
Reverberation mapping of active galactic nuclei: from X-ray corona to dusty torus [PDF]
iScience, 2021 E. Cackett, M. Bentz, E. Kara
semanticscholar +1 more source
Medical Physics, Volume 52, Issue 4, Page 2412-2424, April 2025.Abstract Background In proton radiotherapy, the steep dose deposition profile near the end of the proton's track, the Bragg peak, ensures a more conformed deposition of dose to the tumor region when compared with conventional radiotherapy while reducing the probability of normal tissue complications.
Mariana Brás +3 more
wiley +1 more source