Study of Pre-Main Sequence Stars Near the Beginning of their Accretion Phase

Details Study of Pre-Main Sequence Stars Near the Beginning of their Accretion Phase Study of Pre-Main Sequence Stars Near the Beginning of their Accretion Phase

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003cxo..prop.1374c&link_type=abstract

Chandra Proposal ID #05200040

Physics

Chandra Proposal Id #05200040

Scientific paper

The Trapezium Cluster at the center of the Orion Nebula Cluster (ONC) is one of the youngest and closest (440 pc) active star-forming regions. 80% of the stars are younger than 1 Myr, with a median age of 3x10^5 yr. Many of the late-type PMS stars are actually still protostars in their adiabatic contraction phases. What happens during this accretion phase is still quite mysterious. Many of the properties we know todays are derived from their X-ray signatures. Here we study highly resolved X-ray spectra of a large ensemble of very young and chemically similar PMS stars in terms of their magnetic and accretion properties. In this pointing we add an area to our sample that has specifically X-ray bright members of the ONC unobstructed by the Trapezium core stars.

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