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Observations of DG Tauri with the Keck Interferometer

2003; IOP Publishing; Volume: 592; Issue: 2 Linguagem: Inglês

10.1086/377704

1538-4357

M. M. Colavita, Rachel Akeson, Peter Wizinowich, Minhua Shao, Scott T. Acton, James W. Beletic, J. Bell, Jeffrey Berlin, A. F. Boden, A. J. Booth, R. Boutell, Frederic H. Chaffee, Dwight Chan, J. Chock, Richard W. Cohen, S. Crawford, M. J. Creech‐Eakman, Glenn Eychaner, C. Felizardo, J. Gathright, Graham Hardy, Heike Henderson, J. Herstein, Michael Heß, E. Hovland, M. Hrynevych, Richard L. Johnson, J. H. Kelley, Rick Kendrick, C. Koresko, P. Kurpis, D. Le Mignant, Hilton Lewis, Edgar R. Ligon, William Lupton, David McBride, Bertrand Mennesson, R. Millan‐Gabet, John D. Monnier, James D. Moore, C. Nance, C. Neyman, Albert F. Niessner, Dean L. Palmer, Leonard J. Reder, A. Rudeen, T. Saloga, Anneila I. Sargent, Eugene Serabyn, R. Smythe, Paul J. Stomski, K. Summers, Mark G. Swain, P. Swanson, R. R. Thompson, Kevin Tsubota, A. Tumminello, Gerald van Belle, Gautam Vasisht, J. Vause, James M. Walker, J. Kent Wallace, Udo J. Wehmeier,

Astrophysical Phenomena and Observations

We present the first science results from the Keck Interferometer, a direct-detection infrared interferometer utilizing the two 10 m Keck telescopes. The instrument and system components are briefly described. We then present observations of the T Tauri object DG Tau, which is resolved by the interferometer. The resolved component has a radius of 0.12-0.24 AU, depending on the assumed stellar and extended component fluxes and the model geometry used. Possible origins and implications of the resolved emission are discussed.