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HD 52359


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A companion to AB Pic at the planet/brown dwarf boundary
We report deep imaging observations of the young, nearby star AB Pic, amember of the large Tucana-Horologium association. We have detected afaint, red source 5.5'' South of the star with JHK colors compatiblewith that of a young substellar L dwarf. Follow-up observations at twoadditional epochs confirm, with a confidence level of 4.7σ, thatthe faint red object is a companion to AB Pic rather than it being astationary background object. A low resolution K-band spectrum indicatesan early-L spectral type for the companion. Finally, evolutionary modelpredictions based on the JHK photometry of AB Pic b indicate a mass of13 to 14 MJup if its age is ~30 Myr. Is AB Pic b a massiveplanet or a minimum mass brown dwarf?

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观测天体数据

星座:船尾座
右阿森松:06h59m11.68s
赤纬:-38°49'54.9"
视星:8.76
距离:684.932 天文距离
右阿森松适当运动:-6.3
赤纬适当运动:5.3
B-T magnitude:8.666
V-T magnitude:8.753

目录:
适当名称   (Edit)
HD 1989HD 52359
TYCHO-2 2000TYC 7628-992-1
USNO-A2.0USNO-A2 0450-03213524
HIPHIP 33632

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