Low-frequency radio observations of the emission nebula NGC 2264

Journal Article · Mon Mar 01 04:00:00 EST 1982 · Sov. Astron. (Engl. Transl.); (United States)

OSTI ID:6423243

Abramenkov, E A; Krymkin, V V

The H II region NGC 2264 has been observed with the UTR-2 radio telescope at 12.6, 14.7, 16.7, 20, 25 MHz. The half-power resolution at 25 MHz was 28' x 36'. The brightness distribution is mapped at each frequency; the nebula appears distinctly in absorption against a brighter nonthermal radio background. Several physical parameters are determined for the H II region: T/sub e/ = 4100 +- 2500 /sup 0/K, emission measure 275 cm/sup -6/ pc, n/sub e/ = 2.7 cm/sup -3/. The average nonthermal radio-emission density in the medium between the sun and NGC 2264 at 12.6 MHz is 108 +- 20 /sup 0/K/pc.

• Research Organization: Institute of Radiophysics and Electronics, Ukrainian Academy of Sciences, Khar'kov
• OSTI ID: 6423243
• Journal Information: Sov. Astron. (Engl. Transl.); (United States), Journal Name: Sov. Astron. (Engl. Transl.); (United States) Vol. 26:2; ISSN SAAJA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BRIGHTNESS
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
ELECTRON DENSITY
ELECTRON TEMPERATURE
FREQUENCY RANGE
H2 REGIONS
MHZ RANGE
MHZ RANGE 01-100
NEBULAE
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
RADIOWAVE RADIATION