Interferometric CO-18 observations of DR 21(OH) and L1551 IRS 5 at lambda = 1.4 millimeters

Details Interferometric CO-18 observations of DR 21(OH) and L1551 IRS 5 at lambda = 1.4 millimeters Interferometric CO-18 observations of DR 21(OH) and L1551 IRS 5 at lambda = 1.4 millimeters

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...337l..45p&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 337, Feb. 1, 1989, p. L45-L48.

Astronomy and Astrophysics

Astrophysics

29

Carbon Monoxide, H Ii Regions, Interferometry, Nebulae, Oxygen 18, Pre-Main Sequence Stars, Star Formation, Brightness Temperature, Continuous Radiation, Cosmic Dust, Emission Spectra, Hydroxyl Emission, Stellar Envelopes, Stellar Luminosity

Scientific paper

High-resolution (3 arcsec) aperture synthesis maps in the J = 2 to 1 transition of CO-18 have been obtained for the star formation regions DR 21(OH) and L1551 IRS 5. Two compact sources, separated by 7 arcsec, have been discovered at the centers of H2O maser activity associated with DR 21(OH). Mass estimates from the 1.4 mm continuum and CO-18 line emission are similar to the 110 solar masses required for a bound system with the observed 4 km/s radial velocity difference, suggesting that a massive multiple star system is forming. The CO-18 emission from L1551 IRS 5 is extended in an elongated structure of radius 700 AU and mass of 0.1 solar masses.

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