Results 101 to 110 of about 125,183 (220)

Modeling Star Formation Histories of Changing-look AGN Host Galaxies with Prospector

The Astrophysical Journal
Changing-look active galactic nuclei (CL-AGNs), are AGNs that appear to transition between Seyfert Type 1 and 2 over periods of months to years. Several mechanisms to trigger these transitions have been proposed, but we have yet to conclusively determine
Margaret E. Verrico, K. Decker French, Katherine A. Suess, Tanay Agrawal, Lauranne Lanz, Yuanze Luo, Pallavi Patil, Kate Rowlands, Margaret Shepherd, Maya Skarbinski   +9 more
doaj   +1 more source

Schilderung der merkwürdigsten Ereignisse zur Zeit des Bombardements der Stadt Zittau, am 23. July 1757, nach handschriftlichen Aufzeichnungen glaubwürdiger Männer / Als ein historisches Denkmal bearbeitet und verfaßt von Karl Friedrich Kretschmann, Amts-Advokat

Vorlageform des Erscheinungsvermerks: Zittau, gedruckt bey Johann Gottfried ...
Kretschmann, Karl Friedrich
core   +1 more source

Two Epochs of VLBI Observations of Eight KISSR Seyfert and LINER Galaxies: Suggestions of Fast and Filamentary Outflows

The Astrophysical Journal
We present here the results from a second epoch of phase-referenced VLBA observations of eight Seyfert and LINER galaxies from the KISSR sample. These sources were chosen based on the presence of double peaks or asymmetries in their emission lines as ...
Preeti Kharb, Anderson Caproni, Salmoli Ghosh, Daniel A. Schwartz, Mousumi Das, Smitha Subramanian, Sravani Vaddi   +6 more
doaj   +1 more source

Circumnuclear starbursts in Seyfert galaxies [PDF]

, 1987
Observational diagnostics for the recognition of circumnuclear star formation in Seyfert galaxies are described and illustrated. These methods include: (1) spatially resolved optical spectroscopy, which allows the emission lines for HII regions to be ...
Wilson, Andrew S.
core  

ON THE EXCESS OF PHYSICAL COMPANIONS AMONG SEYFERT GALAXIES

, 1995
The results of a search for close companions in two magnitude limited samples (mB less than or equal to 15.5) of 99 Seyfert 1 and 98 Seyfert 2 galaxies are presented. It is found that there is an excess of physical companions in both samples of galaxies,
VIOLATO M., RAFANELLI, PIERO, BARUFFOLO A.   +2 more
core   +1 more source

Seyfert galaxies as x-ray sources.

, 1978
Using data from the Leicester University Ariel V Sky Survey Instrument (SSI), the work reported in this thesis establishes that Seyfert galaxies form a class of extragalactic x-ray source.
Martin. Elvis (7701692)
core   +2 more sources

Optical colour maps of Seyfert galaxies [PDF]

Astronomy and Astrophysics Supplement Series, 1998
9 pages, 26 figures, LaTeX, uses l-aa.sty, psfig.sty. A&AS, accepted. Grayscale JPEGs included, original color figures (gif or ps format) can be obtained only by anonymous ftp from ftp://oj287.astro.utu.fi/pub ...
openaire   +2 more sources

Early assembly of the most massive galaxies [PDF]

, 2009
The current consensus is that galaxies begin as small density fluctuations in the early Universe and grow by in situ star formation and hierarchical merging(1).
Chris A. Collins, Scott T Kay (16045382), Nicola Mehrtens (16047884), Ed Lloyd-Davies, Hoyle, Ben, Hosmer, Mark, Christopher J. Miller, Ben Hoyle, Mehrtens, Nicola, Robert G. Mann, Pedro T. P. Viana, Martin Sahlén (267044), S Adam Stanford (16061237), Mark Hosmer (16070585), Robert C Nichol (16067396), John P Stott (16070582), Martin Sahlén, Sahlen, Martin, John P. Stott, Kathy Romer (4460893), Matt Hilton (6956609), Viana, Pedro T. P., Mann, Robert G., Ben Hoyle (6914513), Stott, John P., Matt Hilton, Robert G Mann (7965452), Andrew Liddle, Stanford, S. Adam, Christopher J Miller (16070591), A. Kathy Romer, Davidson, Michael, Ed Lloyd-Davies (16075100), Romer, A. Kathy, Robert C. Nichol, Andrew Liddle (16042793), Pedro T P Viana (16045379), Nichol, Robert C., Kay, Scott T., Michael J. West, Chris A Collins (16061234), Scott T. Kay, Collins, Chris A., Michael Davidson, Mark Hosmer, West, Michael J., Michael Davidson (699678), S. Adam Stanford, Michael J West (5524436), Liddle, Andrew, Nicola Mehrtens, Miller, Christopher J., Hilton, Matt, Lloyd-Davies, Ed   +53 more
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Observations of a Magellanic Corona. [PDF]

Nature, 2022
Krishnarao D, Fox AJ, D'Onghia E, Wakker BP, Cashman FH, Howk JC, Lucchini S, French DM, Lehner N.   +8 more
europepmc   +1 more source

Missing Seyfert Galaxies

, 2017
El objetivo de este trabajo es la estimaci´on del n´umero de galaxias Seyfert faltantes debido a la ocultaci´on por el polvo del disco de las galaxias espirales.
Tovmassian, Hrant M., Yam, O.
core