Extreme ultraviolet spectroscopy of the Seyfert 1 galaxy Markarian 478

Conference · Mon Jun 26 00:00:00 EDT 1995

OSTI ID:106583

Liedahl, D A ^[1]; Paerels, F; Hur, M Y; Kahn, S M; Fruscione, A; Bowyer, S ^[2]

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1. Lawrence Livermore National Lab., CA (United States)
2. Univ. of California, Berkeley, CA (United States)

The Seyfert 1 galaxy Mrk 478, observed during the EUVE all-sky survey, is the brightest EUV source among its class. The SW spectrum of this object shows evidence of discrete emission, although this interpretation is tentative, since the source spectrum must be extracted against a bright background. If the EUV flux is, in fact, composed partly of line emission, the authors attribute the discrete structure to emission from a collision-driven plasma at temperatures {approx_gt} 10{sup 6} K. In this context, they discuss some of the constraints imposed on the emission-line region by this observation.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 106583
• Report Number(s): UCRL-JC-121090; CONF-9503167-2; ON: DE95016618; TRN: AHC29525%%82
• Resource Relation: Conference: 1995 International Astronomical Union (IAU) colloquium #152 on astrophysics in the extreme ultraviolet, Berkeley, CA (United States), 27-30 Mar 1995; Other Information: PBD: 26 Jun 1995
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
SEYFERT GALAXIES
EXTREME ULTRAVIOLET SPECTRA
RADIATION FLUX
EMISSION SPECTRA
DATA ANALYSIS
COSMIC RADIO SOURCES
ELECTRON TEMPERATURE
GALAXY NUCLEI
MASS DISTRIBUTION
COSMIC GASES