Results 231 to 240 of about 160,296 (274)

Supermassive black-hole growth over cosmic time: active galaxy demography, physics, and ecology from Chandra surveys. [PDF]

Proc Natl Acad Sci U S A, 2010
Brandt WN, Alexander DM.
europepmc   +1 more source

Infrared variability of the Seyfert galaxy NGC 3783 [PDF]

, 1992
I. S. Glass
openalex   +1 more source

Active galactic nuclei. [PDF]

Proc Natl Acad Sci U S A, 1999
Fabian AC.
europepmc   +1 more source

Optical evidence for the unification of active galactic nuclei and quasi-stellar objects. [PDF]

Proc Natl Acad Sci U S A, 1995
Miller JS.
europepmc   +1 more source

Revelations in our own backyard: Chandra's unique Galactic Center discoveries. [PDF]

Proc Natl Acad Sci U S A, 2010
Markoff S.
europepmc   +1 more source

A millimeter-wave survey of CO emission in Seyfert galaxies

, 1989
Timothy M. Heckman, Leo Blitz, A. S. Wilson, L. Armus, G. K. Miley   +4 more
openalex   +2 more sources

X-Rays from the Location of the Double-humped Transient ASASSN-15lh. [PDF]

Astrophys J, 2017
Margutti R, Metzger BD, Chornock R, Milisavljevic D, Berger E, Blanchard PK, Guidorzi C, Migliori G, Kamble A, Lunnan R, Nicholl M, Coppejans DL, Dall'Osso S, Drout MR, Perna R, Sbarufatti B.   +15 more
europepmc   +1 more source

Spectrophotometry of Calan-Tololo Seyfert galaxies - Objects from list 1

, 1989
J. Maza, M. T. Ruíz
openalex   +1 more source

Structure of photodissociation fronts in star-forming regions revealed by observations of high-J CO emission lines with Herschel. [PDF]

Astron Astrophys, 2018
Joblin C, Bron E, Pinto C, Pilleri P, Le Petit F, Gerin M, Le Bourlot J, Fuente A, Berne O, Goicoechea JR, Habart E, Köhler M, Teyssier D, Nagy Z, Montillaud J, Vastel C, Cernicharo J, Röllig M, Ossenkopf-Okada V, Bergin EA.   +19 more
europepmc   +1 more source

Astrophysical symmetries. [PDF]

Proc Natl Acad Sci U S A, 1996
Trimble V.
europepmc   +1 more source