Hydrogen-line intensities in the spectrum of the quasar 3C 273

Journal Article · Sun Jul 01 04:00:00 EDT 1979 · Sov. Astron. Lett. (Engl. Transl.); (United States)

OSTI ID:5568886

Luud, L S; Ilmas, M E

The continuous spectrum of 3C 273 in the region where the hydrogen line spectrum is formed can be represented by a superposition of synchrotron radiation with F..nu..proportional..nu../sup -2.36/ and black-body radiation corresponding to T=17,000--20,000 /sup 0/K. The interstellar and intraquasar reddening is equivalent to color excesses E (B-V)/sub i/=0/sup m/.07, E (B-V)/sub q/ =0/sup m/.13--0/sup m/.20. The intensity of the H..cap alpha.., H..beta.., H..gamma.. lines is measured on spectra secured with video scanners on the 1.5-m and 6-m telescopes. Theoretical intensities of the L..cap alpha.., H..cap alpha.., H..beta.., H..gamma.., P..cap alpha.. lines are calculated by Sobolev's method. For moderate line absorption the computed and observed intensities are consistent.

• Research Organization: Institute of Astrophysics and Atmospheric Physics, Academy of Sciences of the Estonian SSR, Tyravere
• OSTI ID: 5568886
• Journal Information: Sov. Astron. Lett. (Engl. Transl.); (United States), Journal Name: Sov. Astron. Lett. (Engl. Transl.); (United States) Vol. 5:4; ISSN SALED
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BALMER LINES
BREMSSTRAHLUNG
COSMIC RADIO SOURCES
CRYOGENIC FLUIDS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY SPECTRA
FLUIDS
HYDROGEN
INTERSTELLAR GRAINS
LYMAN LINES
NONMETALS
PARTICLES
PASCHEN LINES
QUASARS
RADIATIONS
SPECTRA
SYNCHROTRON RADIATION