Other
Scientific paper
Jul 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sfet.confe..33d&link_type=abstract
"Star Formation in the Era of Three Great Observatories, meeting abstracts from the conference held July 13-15, 2005 in Cambridg
Other
1
Scientific paper
We present a deep Chandra ACIS-I imaging observation of the very young cluster NGC 2362. This cluster, only 5 Myr old, is exceptionally free of dust and differential reddening for its age, and offers a unique opportunity of studying its pre-main-sequence stellar population with minimal disturbance from a dense interstellar medium. In this observation of NGC 2362 we detect almost 400 X-ray sources, most of which identified optically with low-mass pre-main-sequence stars. The quiescent X-ray emission of low-mass cluster stars is found to be rather strictly correlated with the stellar bolometric luminosity, with a spread much smaller (a factor of 2 rms) than that found in other young clusters. Such a small spread in the correlation leaves very little room for variability of the X-ray emission, on timescales of either the stellar rotation, or longer (e.g., activity cycles). This puts a strong upper limit on the maximum amplitude of possible activity cycles in very young coronal sources.
Damiani Francesco
Harnden Rick F.
Huelamo Nuria
Micela Giuseppina
Murray Stephen S.
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