1998ApJ...507L.149M

Query : 1998ApJ...507L.149M

1998ApJ...507L.149M - Astrophys. J., 507, L149-L152 (1998/November-2)

FU Orionis resolved by infrared long-baseline interferometry at a 2 AU scale.

MALBET F., BERGER J.-P., COLAVITA M.M., KORESKO C.D., BEICHMAN C., BODEN A.F., KULKARNI S.R., LANE B.F., MOBLEY D.W., PAN X.P., SHAO M., VAN BELLE G.T. and WALLACE J.K.

Abstract (from CDS):

We present the first infrared interferometric observations of a young stellar object with a spatial projected resolution better than 2 AU. The observations were obtained with the Palomar Testbed Interferometer (PTI). FU Orionis exhibits a visibility of V2=0.72±0.07 for a 103±5 m-projected baseline at λ=2.2 µm. On the spatial scale probed by the PTI, the data are consistent with both a binary system scenario (a maximum magnitude difference of 2.7±0.5 mag and the smallest separation of 0.35±0.05 AU) and a standard luminous accretion disk model (M{dot}∼6x10–5 M☉.yr–1), where the thermal emission dominates the stellar scattering, and are inconsistent with a single stellar photosphere.

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Journal keyword(s): Accretion, Accretion Disks - Stars: Circumstellar Matter - Infrared: Stars - Instrumentation: Interferometers - Stars: Individual: Constellation Name: FU Orionis - Stars: Pre-Main-Sequence

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* FU Ori Or* 05 45 22.3647842544 +09 04 12.291320064   10.72 9.60     F0Iab 888 1
2 HD 42807 RS* 06 13 12.5028624208 +10 37 37.712484445   7.12   6.0   G5V 254 0

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