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Astron. Astrophys. 337, 465-471 (1998)


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A near-infrared study of IRAS-selected T Tauri stars in Chamaeleon II

K.A. Larson 1, 2, D.C.B. Whittet * 1, T. Prusti 3 and J.E. Chiar*, 1

1 Department of Physics, Applied Physics, & Astronomy, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
2 Anglo-Australian Observatory, Schmidt Telescope, Private Bag, Coonabarabran, NSW 2357, Australia
3 ISO Science Operations Centre, Astrophysics Division, ESA, Villafranca del Castillo, P.O. Box 50727, E-28080 Madrid, Spain

Received 6 January 1998 / Accepted 10 June 1998

Abstract

We use near-infrared photometry of objects detected by IRAS to confirm *four new T Tauri stars in Chamaeleon II. Observations of these sources generally agree with the T Tauri signatures of locus in the near-infrared color-color diagram, mid-infrared spectral index, and IRAS far-infrared colors. Infrared properties of these stars are similar to optically selected T Tauri stars in Cha II, but are on average more luminous and are located at the north-east boundary of star formation in the cloud. We compare results of infrared color methods used to detect T Tauri stars in Cha II with results of other methods based on optical and X-ray emission.

Key words: stars: pre-main-sequence – ISM: individual objects: Cha II – infrared: stars

* Visiting astronomer, Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatories, which are operated by the Association of Universities for Research in Astronomy, under contract with the National Science Foundation

Present address: NASA Ames Research Center, Mail Stop 245-3, Moffett Field, CA 94035, USA

Send offprint requests to: K. Larson
Correspondence to: Department of Physics, Applied Physics, & Astronomy, Rensselaer Polytechnic Institute, Troy, NY 12180, USA (kal@charon.phys.rpi.edu)

© European Southern Observatory (ESO) 1998

Online publication: August 17, 1998

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