Results 111 to 120 of about 512 (184)

Strong long-term variability in active galactic nuclei affects virial black hole mass measurements. [PDF]

Nat Commun
Amrutha N, Wolf C, Onken CA, Hon WJ, Lai S, Raithel D, Tan AHT, Webster R.   +7 more
europepmc   +1 more source

Extragalactic radio surveys in the pre-Square Kilometre Array era. [PDF]

R Soc Open Sci, 2017
Simpson C.
europepmc   +1 more source

Little red dots as young supermassive black holes in dense ionized cocoons. [PDF]

Nature
Rusakov V, Watson D, Nikopoulos GP, Brammer G, Gottumukkala R, Harvey T, Heintz KE, Damgaard R, Sim SA, Sneppen A, Vijayan AP, Adams N, Austin D, Conselice CJ, Goolsby CM, Toft S, Witstok J.   +16 more
europepmc   +1 more source

More Seyfert galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 1978
openaire   +1 more source

A tidal disruption event from an intermediate-mass black hole revealed by comprehensive multi-wavelength observations. [PDF]

Nat Commun
Wang J, Huang M, Xue Y, Jiang N, Huang S, Wang Y, Zhu J, Zhu S, Dai L, Jin C, Luo B, Shu X, Sun M, Wang T, Zou F.   +14 more
europepmc   +1 more source

Discovery of a very Lyman-α-luminous quasar at z = 6.62. [PDF]

Sci Rep, 2017
Koptelova E, Hwang CY, Yu PC, Chen WP, Guo JK.   +4 more
europepmc   +1 more source

An atlas of Seyfert galaxies

The Astrophysical Journal, 1974
E. Y. Khachikian, D. W. Weedman
openaire   +1 more source

JWST interferometric imaging reveals the dusty torus obscuring the supermassive black hole of Circinus galaxy. [PDF]

Nat Commun
Lopez-Rodriguez E, Sanchez-Bermudez J, González-Martín O, Nikutta R, Lau RM, Thatte D, García-Bernete I, Girard JH, Hankins MJ.   +8 more
europepmc   +1 more source

SiO and CH3OH mega-masers in NGC 1068. [PDF]

Nat Commun, 2014
Wang J, Zhang J, Gao Y, Zhang ZY, Li D, Fang M, Shi Y.   +6 more
europepmc   +1 more source

Multiwavelength analysis of the variability of the blazar 3C 273. [PDF]

Mon Not R Astron Soc, 2020
Fernandes S, Patiño-Álvarez VM, Chavushyan V, Schlegel EM, Valdés JR.   +4 more
europepmc   +1 more source