FU Orionis Resolved by Infrared Long-Baseline Interferometry at a 2 AU Scale | Zendy

F. Malbet | Zendy; Jean-Philippe Berger | Zendy; M. M. Colavita | Zendy; C. Koresko | Zendy; Charles Beichman | Zendy; Andrew F. Boden | Zendy; S. R. Kulkarni | Zendy; Benjamin F. Lane | Zendy; D. W. Mobley | Zendy; Xiaopei Pan | Zendy; M. Shao | Zendy; Gerald van Belle | Zendy; J. Kent Wallace | Zendy

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FU Orionis Resolved by Infrared Long-Baseline Interferometry at a 2 AU Scale

Author(s) -

F. Malbet,

Jean-Philippe Berger,

M. M. Colavita,

C. Koresko,

Charles Beichman,

Andrew F. Boden,

S. R. Kulkarni,

Benjamin F. Lane,

D. W. Mobley,

Xiaopei Pan,

M. Shao,

Gerald van Belle,

J. Kent Wallace

Publication year - 1998

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/311688

Subject(s) - physics , astrophysics , interferometry , photosphere , visibility , young stellar object , infrared , astronomy , circumstellar disk , optics , stars , star formation , spectral line

We present the first infrared interferometric observations of a young stellarobject with a spatial projected resolution better than 2 AU. The observationswere obtained with the Palomar Testbed Interferometer. FU Ori exhibits avisibility of V^2 =0.72 +/- 0.07 for a 103 +/- 5 m projected baseline at lambda= 2.2 microns. The data are consistent on the spatial scale probed by PTI bothwith a binary system scenario (maximum magnitude difference of 2.7 +/- 0.5 magand smallest separation of 0.35 +/- 0.05 AU) and a standard luminous accretiondisk model (approx. accretion rate of 6e-5 Mo/yr) where the thermal emissiondominates the stellar scattering, and inconsistent with a single stellarphotosphere.Comment: 13 pages, 4 figures, accepted for publication in ApJ

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