A CO survey of regions around 34 open clusters

Journal Article · Tue Aug 01 04:00:00 EDT 1989 · Astrophysical Journal, Supplement Series; (USA)

DOI:https://doi.org/10.1086/191357· OSTI ID:5475490

Leisawitz, D; Bash, F N; Thaddeus, P ^[1]

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1. NASA, Goddard Space Flight Center, Greenbelt, MD (USA)

Results are presented from a systematic search for CO emission from regions around 34 young open clusters in the outer Galaxy. The clusters have well-determined distances ranging from about 1 to 5 kpc and ages not greater than about 100 Myr. It was found that some moderately young clusters have no associated CO emission. All the surveyed clusters younger than about 5 Myr have associated with them at least one molecular cloud more massive than 10,000 solar mass, while the molecular clouds associated with clusters older than about 10 Myr are not more massive than a few thousands solar masses. It was also found that molecular clouds are receding from young clusters at a rate of about 10 km/sec, and that they seem to be destroyed by their interaction with the stars. Sites of ongoing star formation were identified in a number of clouds associated with young clusters. 186 refs.

• OSTI ID: 5475490
• Journal Information: Astrophysical Journal, Supplement Series; (USA), Journal Name: Astrophysical Journal, Supplement Series; (USA) Vol. 70; ISSN APJSA; ISSN 0067-0049
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AGE ESTIMATION
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COSMIC GASES
DISTANCE
EMISSION SPECTRA
FLUIDS
GALAXIES
GASES
INTERSTELLAR SPACE
MASS
MILKY WAY
MOLECULES
NEBULAE
OXIDES
OXYGEN COMPOUNDS
RADIAL VELOCITY
SPACE
SPECTRA
STAR CLUSTERS
STAR EVOLUTION
VELOCITY