CO abundances and star formation in the three irregular galaxies NGC 4449, NGC 4214, and NGC 3738

Journal Article · Fri Mar 15 04:00:00 EST 1985 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/163017· OSTI ID:5671978

Tacconi, L J; Young, J S

CO emission has been detected in the central 1.3 kpc of the three irregular galaxies NGC 4449, NGC 4214, NGC 3738, and also in a gaint H II complex in NGC 4449 using the 14 m telescope of the Five College Radio Astronomy Observatory (HPBW = 50''). The CO distribution in NGC 4449 appears clumped, with stronger emission found in one H II complex than in the central region of the galaxy. Comparing the irregulars with the luminous Scd galaxy IC 342, all of which are roughly at the same distance, the central 50'' of the irregulars haue 2--5 times less blue luminosity than the central 50'' in IC 342 but have factors of 40--70 less CO.

• Research Organization: Five College Radio Astronomy Observatory and Department of Physics and Astronomy, University of Massachusetts, Amherst
• OSTI ID: 5671978
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 290:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COSMIC RADIO SOURCES
DISTRIBUTION
EMISSION
GALAXIES
H2 REGIONS
INTERSTELLAR GRAINS
LUMINOSITY
MASS
NEBULAE
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PHYSICAL PROPERTIES
SPATIAL DISTRIBUTION
SPECTRA
STAR ACCRETION
STAR EVOLUTION