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HD 143066


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The Near-Infrared Size-Luminosity Relations for Herbig Ae/Be Disks
We report the results of a sensitive K-band survey of Herbig Ae/Be disksizes using the 85 m baseline Keck Interferometer. Targets were chosento span the maximum range of stellar properties to probe the disk sizedependence on luminosity and effective temperature. For most targets,the measured near-infrared sizes (ranging from 0.2 to 4 AU) support asimple disk model possessing a central optically thin (dust-free)cavity, ringed by hot dust emitting at the expected sublimationtemperatures (Ts~1000-1500 K). Furthermore, we find a tightcorrelation of disk size with source luminosity R~L1/2 for Aeand late Be systems (valid over more than two decades in luminosity),confirming earlier suggestions based on lower quality data.Interestingly, the inferred dust-free inner cavities of the highestluminosity sources (Herbig B0-B3 stars) are undersized compared topredictions of the ``optically thin cavity'' model, likely because ofoptically thick gas within the inner AU.

UVBY observations of A, F, G and K field stars
Photoelectric data in the uvby system have been obtained for about 800southern stars of the Hipparcos Input Catalog (Grenon, 1982, 1985). Mostof the stars are F and G main sequence and fall in the magnitude range V= 8-11.

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Dades d'Observació i Astrometria

Constel·lació:Libra
Ascensió Recta:15h58m33.42s
Declinació:-09°00'12.2"
Magnitud Aparent:8.387
Distancia:884.956 parsecs
Moviment propi RA:-4.6
Moviment propi Dec:1.5
B-T magnitude:9.467
V-T magnitude:8.477

Catàlegs i designacions:
Noms Propis   (Edit)
HD 1989HD 143066
TYCHO-2 2000TYC 5611-750-1
USNO-A2.0USNO-A2 0750-09324479
HIPHIP 78244

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