Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...463l..97f&link_type=abstract
Astrophysical Journal Letters v.463, p.L97
Astronomy and Astrophysics
Astronomy
31
Stars: Formation, Ism: Individual Alphanumeric: L1527
Scientific paper
Submillimeter continuum maps at 800 mu m of the embedded source IRAS 04368+2557 in L1527 in Taurus show that there are two sources separated by 20", or 2800 AU. The secondary source is between 2 and 3 times less luminous than the primary source if both sources have similar spectral energy distributions. Large-scale C18O J = 1 --> 0 emission shows the sources to be embedded in a single dense core, and observations of C18O and C17O show the sources to be associated with a compact region of high-density gas. Three transitions of C18O show a velocity gradient between the two sources. On the smallest size scale, the C18O J = 3 --> 2 emission has a velocity gradient of 3--7 km s-1 pc-1. The proximity of the sources in both space and velocity suggest that they are a very young protobinary system. The estimated age of the primary source, 5 x 103 yr, is much less than the estimated orbital period, 1.4 x 105 yr. The separation and young age of the system indicates that it formed through fragmentation of the dense core during collapse.
Fuller Gary A.
Hodapp Klaus W.
Ladd Edwin F.
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