Ring nebulae around Wolf--Rayet stars: filaments and diffuse matter in NGC 6888

Journal Article · Thu May 01 04:00:00 EDT 1980 · Sov. Astron. Lett. (Engl. Transl.); (United States)

OSTI ID:6838547

Lozinskaya, T A

New interferometric observations of the diffuse emission of NGC 6888 are reported. The halfwidths of the H..cap alpha.. and lambda6584 (N II) lines emitted by the smoothly distributed interfilament gas are ..delta..V(H..cap alpha..)=250 +- 50 km/sec, ..delta..V((N II))=210 +- 60 km/sec, values five times the halfwidth of these lines in the filaments. The contrast R=I/sub fil//I/sub dif/ of the filaments above the diffuse background is found to be R(H..cap alpha..)=12 +- 3, R((N II))=6 +- 3. The nature of the ring nebulae observed around Wolf--Rayet stars is discussed.

• Research Organization: Shternberg Astronomical Institute, Moscow
• OSTI ID: 6838547
• Journal Information: Sov. Astron. Lett. (Engl. Transl.); (United States), Journal Name: Sov. Astron. Lett. (Engl. Transl.); (United States) Vol. 6:3; ISSN SALED
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BALMER LINES
DATA
EMISSION SPECTRA
EXPERIMENTAL DATA
GALACTIC EVOLUTION
GALAXIES
INFORMATION
INTERFEROMETRY
MAIN SEQUENCE STARS
MATHEMATICAL MODELS
NEBULAE
NUMERICAL DATA
SPECTRA
STAR MODELS
STARS
WOLF-RAYET STARS