NGC 1333 IRAS 4 - A very young, low-luminosity binary system

Astronomy and Astrophysics – Astronomy

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Infrared Sources (Astronomy), Interstellar Matter, Pre-Main Sequence Stars, Star Formation, Stellar Mass Accretion, Astronomical Photometry, Cosmic Dust, Infrared Astronomy Satellite, Stellar Luminosity, Submillimeter Waves

Scientific paper

IRAS 4 is a cold, low luminosity source in the active star formation region NGC 1333. The present sub-mm photometry and high spatial resolution 800- and 450-micron maps resolve this source into a binary system whose components are separated by about 31 arcsec and connected by a bridge of faint dust emission. The dust masses associated with the binary component are by far the largest seen toward any star of comparable luminosity, and are a factor of 10 higher than predicted by protostar models. It is suggested that these observations indicate a very young stellar system, possibly an actual protostar, in which most luminosity is generated by accretion.

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