Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996mnras.282..401k&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 282, Issue 2, pp. 401-412.
Astronomy and Astrophysics
Astronomy
10
Circumstellar Matter, Stars: Formation, Dust, Extinction, Ism: Individual: Lynds 379, Ism: Molecules
Scientific paper
L379 IRS1, the brightest of three deeply embedded IRAS sources in L379, has been resolved into two submillimetre sources associated with newly discovered outflow material. ^12CO J=2-->1 maps of the region near IRS1 show complicated wing emission which is interpreted as two molecular outflows centred north and south of IRS1. C^18O J=2-->1 integrated emission has a simpler structure, but position-velocity diagrams reveal two distinct components of emission representing clouds separated by ~0.3 pc in declination and ~2.0 km s^-1 in velocity. Continuum maps at 450, 800 and 1100 μm all delineate two clumps located 0.2 pc north and 0.14 pc south of IRS1, connected by an arc of emission west of IRS1. These dust clumps are positioned at or close to the projected centre of each molecular outflow and close to the two C^18O components. They are massive and cold: ~1000 and 680 M_ at 22 and 24 K for the northern and southern components respectively. L379 IRS1 is probably a site of high-mass star formation. However, it is not possible to distinguish whether there are either high-mass protostars or ZAMS B0-5 stars present inside the clumps at this stage.
Kelly Michael L.
Macdonald G. H.
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