Works matching DE "SEYFERT galaxies"
Results: 362
THE EXTREMES OF CONTINUUM AND EMISSION-LINE VARIABILITY OF AGN: CHANGING-LOOK EVENTS AND BINARY SMBHS.
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- Serbian Astronomical Journal, 2024, n. 209, p. 1, doi. 10.2298/SAJ2409001K
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Infrared Seyferts: a new population of active galaxies?
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- Nature, 1985, p. 240, doi. 10.1038/314240a0
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Radio Properties of the Low-Redshift Isolated Galaxies with Active Nuclei.
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- Kinematics & Physics of Celestial Bodies, 2023, v. 39, n. 2, p. 98, doi. 10.3103/S088459132302006X
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The Xgal Catalog of X-Ray Galaxies.
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- Kinematics & Physics of Celestial Bodies, 2021, v. 37, n. 3, p. 149, doi. 10.3103/S0884591321030077
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Variations of the X-ray INTEGRAL spectrum of the active galactic nucleus of NGC 4945.
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- Kinematics & Physics of Celestial Bodies, 2016, v. 32, n. 4, p. 172, doi. 10.3103/S0884591316040036
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Ultrahigh Energy Cosmic Ray Acceleration in Seyfert Galactic Nuclei.
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- Astronomy Letters, 2001, v. 27, n. 12, p. 775, doi. 10.1134/1.1424359
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Nuclear Activity of NGC 5548 from UBVRI Observations during 1990–2000.
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- Astronomy Letters, 2001, v. 27, n. 11, p. 691, doi. 10.1134/1.1415858
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Evidence of heavy obscuration in the low-luminosity AGN NGC 4941.
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- Journal of Astrophysics & Astronomy, 2022, v. 43, n. 1, p. 1, doi. 10.1007/s12036-021-09786-4
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Gamma-ray emitting narrow-line Seyfert 1 galaxies: Past, present, and future.
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- Journal of Astrophysics & Astronomy, 2019, v. 40, n. 5, p. N.PAG, doi. 10.1007/s12036-019-9604-3
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Long-term ultraviolet variability of Seyfert galaxies.
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- Journal of Astrophysics & Astronomy, 2018, v. 39, n. 6, p. 1, doi. 10.1007/s12036-018-9556-z
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Short timescale UV variability study in NGC 4151 using IUE data.
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- Journal of Astrophysics & Astronomy, 2018, v. 39, n. 5, p. 1, doi. 10.1007/s12036-018-9539-0
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Japanese VLBI Network Observations of a Gamma-Ray Narrow-Line Seyfert 1 Galaxy 1H 0323+342.
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- Journal of Astrophysics & Astronomy, 2014, v. 35, n. 3, p. 215, doi. 10.1007/s12036-014-9197-9
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Spectral Energy Distributions of SDSS Blazars.
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- Journal of Astrophysics & Astronomy, 2014, v. 35, n. 3, p. 387, doi. 10.1007/s12036-014-9237-5
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Are Radio-Loud Narrow-Line Seyfert 1 Galaxies Blazar-like?
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- Journal of Astrophysics & Astronomy, 2014, v. 35, n. 3, p. 391, doi. 10.1007/s12036-014-9238-4
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Spectral Variation of NLS1 Galaxy PMN J0948+0022.
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- Journal of Astrophysics & Astronomy, 2014, v. 35, n. 3, p. 457, doi. 10.1007/s12036-014-9252-6
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Seyfert Galaxies: Radio Continuum Emission Properties and the Unification Scheme.
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- Journal of Astrophysics & Astronomy, 2011, v. 32, n. 4, p. 497, doi. 10.1007/s12036-011-9096-2
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Variability of Fe ii in Two NLS1s, PG 1700+815 and NGC 4051.
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- Journal of Astrophysics & Astronomy, 2011, v. 32, n. 1/2, p. 253, doi. 10.1007/s12036-011-9067-7
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The Tilt between Acretion Disk and Stellar Disk.
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- Journal of Astrophysics & Astronomy, 2011, v. 32, n. 1/2, p. 197, doi. 10.1007/s12036-011-9054-z
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Quasi-Periodic Oscillations in the X-ray Light Curves of Blazars.
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- Journal of Astrophysics & Astronomy, 2011, v. 32, n. 1/2, p. 147, doi. 10.1007/s12036-011-9071-y
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Low Luminosity BL Lacs.
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- Astrophysics & Space Science, 2003, v. 285, n. 1, p. 257, doi. 10.1023/a:1024615305273
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Supermassive black holes do not correlate with galaxy disks or pseudobulges.
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- Nature, 2011, v. 469, n. 7330, p. 374, doi. 10.1038/nature09694
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Broad line emission from iron K- and L-shell transitions in the active galaxy 1H 0707-495.
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- Nature, 2009, v. 459, n. 7246, p. 540, doi. 10.1038/nature08007
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A Black Hole's Elusive Signal Revealed at Last.
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- Mercury, 2009, v. 38, n. 3, p. 9
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Studying the Correlation between Supermassive Black Holes and Star Formation Rate for Samples of Seyfert Galaxies (Type 1 and 2).
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- Iraqi Journal of Physics, 2021, v. 19, n. 48, p. 52, doi. 10.30723/ijp.v19i48.641
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Jet acceleration of the fast molecular outflows in the Seyfert galaxy IC 5063.
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- Nature, 2014, v. 511, n. 7510, p. 440, doi. 10.1038/nature13520
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Spectroscopy of Seyferts in the Far-UV.
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- Bulletin of the Astronomical Society of India, 2003, v. 31, n. 3/4, p. 429
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Seyfert galaxies: Nuclear radio structure and unification.
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- Bulletin of the Astronomical Society of India, 2002, v. 30, n. 3, p. 777
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Cosmological Constraints on a Temporal Variation of the Proton-to-electron Mass Ratio based on the Red-shifted Lines of Extragalactic Argonium.
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- Astronomy Reports, 2021, v. 65, n. 12, p. 1211, doi. 10.1134/S1063772921120076
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Changing Looks of the Nucleus of Seyfert Galaxy NGC 3516 during 2016–2020.
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- Astronomy Reports, 2020, v. 64, n. 12, p. 979, doi. 10.1134/S1063772920120082
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Narrow-Line SY1 NGC 4748 in X-Rays: Detailed Case-Study.
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- Astronomy Reports, 2020, v. 64, n. 5, p. 384, doi. 10.1134/S1063772920050042
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Morphology of Seyfert Galaxies.
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- Astronomy Reports, 2018, v. 62, n. 12, p. 853, doi. 10.1134/S1063772918120181
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The mass of the central body of the galaxy Ark 120 and the orbits of objects in its gravitational field.
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- Astronomy Reports, 2015, v. 59, n. 2, p. 123, doi. 10.1134/S106377291412004X
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Narrow-line Seyfert 1 galaxies. Relationship between their frequency of occurrence and the large-scale structure of the universe.
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- Astronomy Reports, 2014, v. 58, n. 4, p. 205, doi. 10.1134/S1063772914040052
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AGN III-primordial activity in the nuclei of disk galaxies with pseudobulges.
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- Astronomy Reports, 2013, v. 57, n. 6, p. 401, doi. 10.1134/S1063772913060036
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The luminosity function of narrow-line Seyfert 1 galaxies based on SDSS data (DR7).
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- Astronomy Reports, 2013, v. 57, n. 5, p. 317, doi. 10.1134/S106377291305003X
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Activity of the Seyfert galaxy NGC 4151 in the near-IR in 1994-2011.
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- Astronomy Reports, 2013, v. 57, n. 2, p. 71, doi. 10.1134/S1063772913010071
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The motion of an emission-line region near the center of the galaxy NGC 4151.
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- Astronomy Reports, 2011, v. 55, n. 9, p. 761, doi. 10.1134/S1063772911090034
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The Seyfert 1 galaxy Ark 120 in 1996–2005. Temporal characteristics of the optical variability.
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- Astronomy Reports, 2008, v. 52, n. 9, p. 693, doi. 10.1134/S1063772908090011
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The Seyfert 1 galaxy Ark 120. Spectral variability in 1992–2005.
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- Astronomy Reports, 2008, v. 52, n. 6, p. 442, doi. 10.1134/S1063772908060024
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Upper limit on the coronal cosmic ray energy budget in Seyfert galaxies.
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- Publications of the Astronomical Society of Japan, 2024, v. 76, n. 5, p. 996, doi. 10.1093/pasj/psae065
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Suzaku observation of an iron K-shell line in the spiral galaxy NGC 6946.
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- Publications of the Astronomical Society of Japan, 2024, v. 76, n. 3, p. 523, doi. 10.1093/pasj/psae028
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The variability of the broad line profiles of SDSS J1430+2303.
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- Publications of the Astronomical Society of Japan, 2024, v. 76, n. 1, p. 103, doi. 10.1093/pasj/psad083
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Gamma-ray emission in the Seyfert galaxy NGC 4151: Investigating the role of jet and coronal activities.
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- Publications of the Astronomical Society of Japan, 2023, v. 75, n. 6, p. L33, doi. 10.1093/pasj/psad072
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Nobeyama 45 m CO J = 1–0 observations of luminous type 1 AGNs at z ≈ 0.3.
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- Publications of the Astronomical Society of Japan, 2023, v. 75, n. 4, p. 825, doi. 10.1093/pasj/psad039
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ALMA detection of 321 GHz water maser emission in the radio galaxy NGC 1052.
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- Publications of the Astronomical Society of Japan, 2023, v. 75, n. 2, p. L1, doi. 10.1093/pasj/psad011
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High-sensitivity VLBI observations of water masers in the Seyfert galaxy NGC 1068.
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- Publications of the Astronomical Society of Japan, 2023, v. 75, n. 1, p. 71, doi. 10.1093/pasj/psac092
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Relationship between gamma-ray loudness and X-ray spectra of radio galaxies.
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- Publications of the Astronomical Society of Japan, 2022, v. 74, n. 4, p. 791, doi. 10.1093/pasj/psac036
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X-ray selected narrow-line active galactic nuclei in the COSMOS field: Nature of optically dull active galactic nuclei.
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- Publications of the Astronomical Society of Japan, 2022, v. 74, n. 4, p. 689, doi. 10.1093/pasj/psac029
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Do gas clouds in narrow-line regions of Seyfert galaxies come from their nuclei?
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- Publications of the Astronomical Society of Japan, 2021, v. 73, n. 4, p. 1152, doi. 10.1093/pasj/psab065
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What determines the unique spectra of super-Eddington accretors? Origin of optically thick and low-temperature coronae in super-Eddington accretion flows.
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- Publications of the Astronomical Society of Japan, 2021, v. 73, n. 3, p. 630, doi. 10.1093/pasj/psab023
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