Results 161 to 170 of about 3,447,628 (240)

A toy model for the X-ray spectral variability of active galactic nuclei

, 2014
Investigations into the long-term X-ray spectral variability of 10 active galactic nuclei (AGNs) revealed a positive spectral index-flux correlation for each object.
Cao, Xinwu, Wang, Jun-Xian
core  

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

J Clin Med
Marin L, Bordin L, Sabbadin C, Ambrosini G, Andrisani A.   +4 more
europepmc   +1 more source

Review of Passive Shielding Materials for High-Energy Charged Particles in Earth's Orbit. [PDF]

Materials (Basel)
Wang M, Wang Q, Xiao Y, Wang M, Wang J, Wang H, Chen Z.   +6 more
europepmc   +1 more source

Accurate determination of chemical abundances near a supermassive black hole. [PDF]

Nat Astron
XRISM Collaboration.
europepmc   +1 more source

Active galactic nuclei

Endeavour, 1986
openaire   +2 more sources

Reverberation lags viewed in hard X-rays from an accreting stellar-mass black hole. [PDF]

Nat Commun
You B, Yu W, Ingram A, De Marco B, Qu JL, Zhu ZH, Santangelo A, Xu SE.   +7 more
europepmc   +1 more source

Gravitational lensing of active galactic nuclei. [PDF]

Proc Natl Acad Sci U S A, 1995
Hewitt JN.
europepmc   +1 more source

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

Sci Rep
Schoeffler KM, Bacchini F, Kormann K, Eichmann B, Innocenti ME.   +4 more
europepmc   +1 more source

Universal energy limits of radiation belts in planetary and brown dwarf magnetospheric systems. [PDF]

Sci Adv
Turner DL, Raptis S, Osmane A, Egan A, Clark G, Nordheim T, Regoli L, Ukhorskiy AY.   +7 more
europepmc   +1 more source

Discovery of a star sensitive to the spin of Sagittarius A. [PDF]

Nature
Abd El Dayem K, Abuter R, Aimar N, Amaro-Seoane P, Berdeu A, Berger JP, Bourdarot G, Brandner W, Burkert A, Caldéron D, Correia C, Cuadra J, Davies R, Defrère D, Delit L, Drescher A, Eisenhauer F, Esteras Otal L, Fabricius M, Feuchtgruber H, Flesch S, Förster Schreiber NM, Foschi A, Fournier Q, Garcia P, Garcia Lopez R, Generozov A, Genzel R, Gillessen S, Gonté F, Haubois X, Hönig SF, Houllé M, Joharle S, Kaufer A, Kammerer J, Kervella P, Kolb J, Kreidberg L, Labadie L, Lacour S, Lai O, Laugier R, Le Bouquin JB, Leftley J, Li R, Lopez B, Lutz D, Mang F, Mérand A, Millour F, Montargès M, Morujão N, Nowacki H, Nowak M, Oberti S, Osorno J, Ott T, Paumard T, Paladini C, Pappert S, Perets HB, Perraut K, Perrin G, Petrov R, Petrucci PO, Piran T, Pourré N, Rabien S, Ribeiro DC, Robbe-Dubois S, Sadun Bordoni M, Sanchez-Bermudez J, Santos D, Sari R, Sauter J, Scheithauer S, Scigliuto J, Shangguan J, Shimizu TT, Soulez F, Stadler J, Straubmeier C, Sturm E, Subroweit M, Sykes C, Tacconi LJ, Thévenet P, Urso I, Vincent F, Woillez J, Zins G, GRAVITY+ Collaboration.   +92 more
europepmc   +1 more source