Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.8922m&link_type=abstract
American Astronomical Society, AAS Meeting #211, #89.22; Bulletin of the American Astronomical Society, Vol. 39, p.881
Astronomy and Astrophysics
Astronomy
Scientific paper
We present Chandra archival observations of an 8' x 8' region in the 4Myr old open cluster Trumpler 37. Thirty seven X-ray sources were detected in this area; they all match spatially to bright IR sources identified in Spitzer IRAC data. The X-ray data reveal a larger population of pre-main sequence cluster members, not previously cataloged by optical and infrared surveys. The X-ray spectra of three stars permit spectral fits that reveal two distinct plasma temperatures, as has been seen in some of the brightest nearby T Tauri stars. Using measurements of X-ray and IR fluxes of these sources, we examine the influence of accretion on the role of X-ray activity in pre-main sequence stars. Contrary to some recent studies, the data do not suggest that higher accretion rates inhibit X-ray emission.
Calvet Nuria
Hartmann Lee
Mercer Emily P.
Miller John Mcl.
Sicilia-Aguilar Aurora
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