Results 181 to 190 of about 125,183 (220)

Observational model of the ionized gas in Seyfert and radio-galaxy nuclei. [PDF]

Proc Natl Acad Sci U S A, 1978
Osterbrock DE.
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The nuclear region of the spiral galaxy M81. [PDF]

Proc Natl Acad Sci U S A, 1995
Bartel N, Bietenholz MF, Rupen MP.
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Difficulties with unification. [PDF]

Proc Natl Acad Sci U S A, 1995
Singal AK.
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A case for a binary black hole system revealed via quasi-periodic outflows. [PDF]

Sci Adv
Pasham DR, Tombesi F, Suková P, Zajaček M, Rakshit S, Coughlin E, Kosec P, Karas V, Masterson M, Mummery A, Holoien TW, Guolo M, Hinkle J, Ripperda B, Witzany V, Shappee B, Kara E, Horesh A, van Velzen S, Sfaradi I, Kaplan D, Burger N, Murphy T, Remillard R, Steiner JF, Wevers T, Arcodia R, Buchner J, Merloni A, Malyali A, Fabian A, Fausnaugh M, Daylan T, Altamirano D, Payne A, Ferraraa EC.   +35 more
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Outstanding problems and instrumental prospects for the coming decade (A Review). [PDF]

Proc Natl Acad Sci U S A, 1977
Ostriker JP.
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Dust evolution, a global view: III. Core/mantle grains, organic nano-globules, comets and surface chemistry. [PDF]

R Soc Open Sci, 2016
Jones AP.
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Above the Noise: The Search for Periodicities in the Inner Heliosphere. [PDF]

Sol Phys, 2017
Threlfall J, De Moortel I, Conlon T.
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A binary merger product as the direct progenitor of a Type II-P supernova

Niu* Z, Sun* N, Zapartas* E, Souropanis D, Cui Y, Maund JR, Andrews JJ, Briel MM, Fraser M, Gossage S, Kruckow MU, Liotine C, Liu Z, Srivas PM, Teng E, Wang X, Yang Y, Liu J.   +17 more
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Seyfert Galaxies And Their Environment

Symposium - International Astronomical Union, 1999
The role played by environment on nuclear activity in galaxies is not clear and largely debated (see e.g. Barnes & Hernquist 1992, Kelm 1996). To overcome statistical uncertainties, environment properties of two large samples of Seyfert galaxies (Sy 1 and Sy 2 have been kept separated) have been computed and compared with equivalent size “normal ...
P. Focardi, B. Kelm, G.G.C. Palumbo
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