Results 131 to 140 of about 3,447,628 (240)
The SVP–FRO6 Module Integrates the Control of Leaf Senescence and Flowering in Arabidopsis
Plant, Cell &Environment, Volume 49, Issue 9, Page 7191-7209, September 2026.ABSTRACT Plants coordinate major developmental transitions by integrating intrinsic genetic programs with environmental signals, where nutrient availability serves as a critical external factor shaping growth and fitness. Iron (Fe), an essential micronutrient for cellular respiration and photosynthesis, is strictly regulated through sophisticated ...
Hyunsu Park +8 more
wiley +1 more source
Black hole masses and Doppler factors of gamma-ray active galactic nuclei
, 2004 The sizes of the broad-line regions (BLRs) in gamma-ray active galactic nuclei (AGNs) are estimated from their optical continuum luminosity by using the empirical relation between R-BLR and L-lambda,L-opt.
Fan, ZH, Cao, XW
core
Optical & X-ray Studies of Ultraluminous X-ray Sources [PDF]
, 2009 Ultraluminous X-ray Sources (ULXs) are point like X-ray sources situated external to the nucleus of their host galaxy, with inferred X-ray luminosities in excess of 10^{39} erg s^{−1} .
Gladstone, Jeanette Claire +1 more
core
The Astrophysical JournalWe report the discovery of ultrafast outflows (UFOs) in the super-Eddington active galactic nucleus (AGN) IRAS F12397+3333, detected in both the hard- and soft-X-ray bands, and present an investigation of the coronal geometry and accretion flow ...
Deblina Lahiri +2 more
doaj +1 more source
Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight
Experimental Physiology, Volume 111, Issue 9, Page 4015-4040, 1 September 2026.Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley +1 more source
A Comprehensive Analysis of WISE Mid-infrared Colors for Obscured AGN Selection
The Astrophysical JournalIn this paper, we investigate the robustness of Wide-field Infrared Survey Explorer mid-IR color selection (W1 − W2) for identifying obscured (type 2) active galactic nuclei (AGNs) at low redshift ( z 0.5 selection emerges as optimal in terms of purity
Anika Goel +6 more
doaj +1 more source
The QPO in RE J1034+396 Originates in the Hot Corona
The Astrophysical JournalRE J1034+396 is one of the few active galactic nuclei (AGNs) with a significant quasiperiodic oscillation (QPO). The QPO has been observed in over 1 Ms of XMM-Newton observations spanning over a decade. We investigate the power spectral density function (
Chloe S. Taylor +2 more
doaj +1 more source
Multiwavelength Monitoring of Active Galactic Nuclei
, 2001 By intensive monitoring of AGN variability over a large range in wavelength, we can probe the structure and physics of active galactic nuclei on microarcsecond angular scales.
Peterson, Bradley M.
core
AGN outflows and the cluster cooling flow conundrum
, 2011 Temperature distributions within cores of galaxy clusters indicate gas in the core should cool down rapidly and contract. The cooling flow problem involves the hypothesis that the rapidly cooling gas should eventually condensate into unobserved molecular
Klees, Ilja
core +1 more source
PACHA: Probing AGN Coronae with High-redshift AGN
The Astrophysical JournalThe X-ray emission of active galactic nuclei (AGN) is generally attributed to the inverse Compton scattering in a compact corona. In local AGN, directly constraining coronal properties is challenging because the key spectral signature, the high-energy ...
Xiurui Zhao +20 more
doaj +1 more source