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The population of young stars in Orion A: X-rays and IR properties

Published online by Cambridge University Press:  18 January 2010

Ignazio Pillitteri ,
S. J. Wolk ,
L. Allen ,
S. T. Megeath  and
R. A. Gutermuth
Ignazio Pillitteri
Affiliation:
Smithsonian Astrophysical Observatory/Harvard University, 60 Garden St. Cambridge, MA 02138, USA
S. J. Wolk
Affiliation:
Smithsonian Astrophysical Observatory/Harvard University, 60 Garden St. Cambridge, MA 02138, USA
L. Allen
Affiliation:
National Optical Astronomy Observatories, USA
S. T. Megeath
Affiliation:
Department of Physics & Astronomy, University of Toledo, OH, USA
R. A. Gutermuth
Affiliation:
Smithsonian Astrophysical Observatory/Harvard University, 60 Garden St. Cambridge, MA 02138, USA
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Abstract

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Stars in the very early stages of their formation are characterized by strong infrared excess and X-ray emission. We present the results of the survey of Orion A in both the infrared and X-rays obtained with the Spitzer and XMM/Newton observatories. We study the spectral-energy distribution class of the young stellar object (YSO) population using infrared colors from 2mass and Spitzer (IRAC and MIPS) and by means of X-ray fluxes, luminosities and plasma temperatures. We discuss clustering properties and spatial segregation among different infrared YSO classes to trace their formation history.

Keywords

stars: activitystars: formationopen clusters and associations: individual (Orion A, L1641)X-rays: starsinfrared: stars
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S266: Star clusters: basic galactic building blocks throughout time and space , August 2009 , pp. 509
Copyright
Copyright © International Astronomical Union 2010