The Collapse of the Wien Tail in the Coldest Brown Dwarf? Hubble Space Telescope Near-Infrared Photometry of WISE J085510.83-071442.5

作者: Adam C. Schneider , Michael C. Cushing , J. Davy Kirkpatrick , Christopher R. Gelino

DOI: 10.3847/2041-8205/823/2/L35

关键词: Brown dwarfWide Field Camera 3Photometry (optics)AstrophysicsPhysicsHubble space telescopeNear-infrared spectroscopyOn board

摘要: We present Hubble Space Telescope (HST) near-infrared photometry of the coldest known brown dwarf, WISE J085510.83−071442.5 (WISE 0855−0714). 0855−0714 was observed with Wide Field Camera 3 (WFC3) on board HST using F105W, F125W, and F160W filters, which approximate Y, J, H bands. is undetected at F105W a corresponding 2σ magnitude limit ~26.9. marginally detect in F125W images (S/N ~ 4), measured 26.41 ± 0.27, more than fainter J-band reported by Faherty et al. J0855−0714 clearly detected band, 23.86 0.03, first secure detection near-infrared. Based these data, we find that has extremely red F 105W - colors relative to other Y dwarfs. when compared models Saumon Morley al., -F125W cannot be accounted for simultaneously. These likely indicate are seeing collapse flux Wien tail this cold object.

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