Physics Experts

Jean-pierre Caillault

Department of Physics and Astronomy
Georgia University
United States of America


Jean-Pierre Caillault is currently working as a Professor in the Department of Physics and Astronomy.

Research Interest

Jean-Pierre Caillault research has concentrated primarily on stellar X-ray astronomy, with a special emphasis on stellar clusters (such as the Pleiades) and star-forming regions (like the Trapezium cluster in the Orion Nebula). One of the most important issues that can be addressed through these studies is determining what parameters (e.g., age and mass) most affect the stellar X-ray luminosity function. Mass-dependent spindown timescales give rise to age-dependent distributions of rotational velocities, i.e., rotation seems to be the key. Since the X-ray activity in a late-type star is expected to arise as the result of the magnetic dynamo, a relation between X-ray emission and rotation is not surprising. This research is carried out mostly with data acquired from satellite-borne imaging X-ray telescopes but also requires the use of optical and radio telescope facilities.


  • I. Song, J.-P. Caillault, D. Barrado y Navascues, J.R. Stauffer, & S. Randich, "Ages of late spectral type Vega-like stars," Astrophys. J. 533, L41 (2000).

  • G. Micela, S. Sciortino, F.R. Harnden, Jr., V. Kashyap, R. Rosner, C.F. Prosser, F. Damiani, J. Stauffer, & J.-P. Caillault, "Deep ROSAT HRI observations of the Pleiades," Astron. & Astrophys., 341 751 (1999).

  • T. Hearty, L. Magnani, J.-P. Caillault, R. Neuhauser, J.H.M.M. Schmitt, & J. Stauffer, "A search for star formation in the translucent clouds MBM7 & MBM55," Astron. & Astrophys. 341, 163 (1999).

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