Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986s%26t....72..334l&link_type=abstract
Sky and Telescope (ISSN 0037-6604), vol. 72, Oct. 1986, p. 334, 335.
Astronomy and Astrophysics
Astrophysics
1
Astrophysics, Planetary Nebulae, Star Formation, Stellar Evolution, Emission Spectra, Gravitational Collapse, Infrared Astronomy, Molecular Clouds, Sky Surveys (Astronomy), Stellar Envelopes
Scientific paper
As the result of a recent series of high-frequency molecular-line observations, astronomers may have detected the infalling envelope around an embedded radiation source, providing the first direct glimpse at the actual process of star formation. The object in question is known as IRAS 16293-2422 and was initially uncovered in a sky survey by the Infrared Astronomical Satellite. It is in an outlying region of the Ophiuchus dark nebula, near rho Ophiuchi just north of Antares, about 520 light-years away. Using the 12-m-diameter radio telescope of the National Radio Astronomy Observatory at Kitt Peak, emissions from a spectral line of the carbon monosulfide molecule (CS) were observed at a frequency near 245,000 MHz, corresponding to a wavelength of about 1 mm; the asymmetric shape of the emission curve is just what would be expected from a collapsing gas.
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