X-ray and optical studies of emission-line Markarian galaxies

Journal Article · Tue Mar 01 04:00:00 EST 1983 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/113314· OSTI ID:5577576

Ulvestad, J S; Wilson, A S

The x-ray and optical properties of a selection of compact nucleus, emission line Markarian galaxies have been studied. Observations with the Einstein Observatory have detected x rays from all the Seyfert galaxies and none of the narrow emission line galaxies in the sample. This result supports the idea that powerful x-ray emission is correlated with the presence of a broad optical emission line component. The emission line spectra of the Seyfert galaxies show much higher excitation than do the narrow-line galaxies, whose spectra are similar to those of H IIregions. Both the optical properties and the radio and x-ray upper limits of the non-Seyfert galaxies are consistent with the suggestion that those objects have undergone bursts of massive star formation.

• Research Organization: National Radio Astronomy Observatory, Charlottesville, Virginia 22901
• OSTI ID: 5577576
• Journal Information: Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 88:3; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
640105 -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
EMISSION SPECTRA
ENERGY-LEVEL TRANSITIONS
EXCITATION
GALAXIES
GALAXY NUCLEI
MARKARIAN GALAXIES
SEYFERT GALAXIES
SPECTRA
SPECTROPHOTOMETRY
VISIBLE SPECTRA
X-RAY GALAXIES
X-RAY SPECTRA