A study of emission-line variability in the nucleus of Seyfert galaxy NGC 3516 in 1986-1988

Journal Article · Fri Nov 30 23:00:00 EST 1990 · Astronomical Journal; (USA)

DOI:https://doi.org/10.1086/115638· OSTI ID:6159457

Bochkarev, N G; Zhekov, S A; Shapovalova, A I ^[1]

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1. Moskovskii Gosudarstvennyi Universitet, Moscow (USSR) Spetsial'naia Astrofizicheskaia Observatoriia, Nizhni Arkhyz (USSR)

The TV scanner of the 6 m telescope was used in March 1986 and in February-March 1988 to observe the nucleus of the Seyfert galaxy NGC 3516. The data obtained were processed making allowance for the contribution of the absorption spectrum of host galaxy which proved to be of the order of 70 percent in the region of H-beta line. The broad He II 4686 A and Fe II (multiplets 37 and 38) lines have been found. Within two years, the H-beta, H-gamma, and He II 4686 A line intensities changed, the intensity ratio of the H-gamma and H-beta broad components increased by a factor of 2, and the He II 4686 A broad component enhanced. The forbidden O III 4363 A line was not observed in 1986-1988. 38 refs.

• OSTI ID: 6159457
• Journal Information: Astronomical Journal; (USA), Journal Name: Astronomical Journal; (USA) Vol. 100; ISSN 0004-6256; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BALMER LINES
COSMIC RADIO SOURCES
DATA PROCESSING
EMISSION SPECTRA
ENERGY SOURCES
GALAXIES
GALAXY NUCLEI
PROCESSING
QUASARS
SEYFERT GALAXIES
SPECTRA
VARIATIONS