论文标题
WISEA J083011.95+283716.0：缺失的链路行星质量对象
WISEA J083011.95+283716.0: A Missing Link Planetary-Mass Object
论文作者
论文摘要
我们介绍了WISEA J083011.95+283716.0的发现，这是第一个通过后院世界确定的Y矮人候选人：Planet 9 Citizen Science Project。我们将此对象识别为一个红色，快速移动的源，在多epoch \ textit {allwise}和不明智的图像中，$ W2 $检测到了微弱的$ W2 $。我们已经用Spitzer空间望远镜和\ textit {Hubble Space望远镜}对象进行了表征。在\ textIt {spitzer}'s \ emph {ch1}和\ emph {ch2}频段和上限频段和上限上的频段和上限上的频段和磁通量上限，hubble太空望远镜$ f105w $和$ f125w $过滤器中，我们发现这个对象非常淡，并且杂志非常淡（$ ch1-ch1-ch1-p， $ F125W-CH2 \ geq 9.36 $ mag），与t $ _ {eff} \ sim300 $ k源一致，如已知的y矮人人口所估计。初步视差提供$ 11.1^{+2.0} _ { - 1.5} $ pc，导致温度略高，温度略高，为$ \ sim350 $ k。 J0855 $ - $ 0714，并突出了我们对y矮人颜色真正传播的有限了解。我们还提出了另外四个后院世界：星球9后期棕色矮人发现30 pc。
We present the discovery of WISEA J083011.95+283716.0, the first Y dwarf candidate identified through the Backyard Worlds: Planet 9 citizen science project. We identified this object as a red, fast-moving source with a faint $W2$ detection in multi-epoch \textit{AllWISE} and unWISE images. We have characterized this object with Spitzer Space Telescope and \textit{Hubble Space Telescope} follow-up imaging. With mid-infrared detections in \textit{Spitzer}'s \emph{ch1} and \emph{ch2} bands and flux upper limits in Hubble Space Telescope $F105W$ and $F125W$ filters, we find that this object is both very faint and has extremely red colors ($ch1-ch2 = 3.25\pm0.23$ mag, $F125W-ch2 \geq 9.36$ mag), consistent with a T$_{eff}\sim300$ K source, as estimated from the known Y dwarf population. A preliminary parallax provides a distance of $11.1^{+2.0}_{-1.5}$ pc, leading to a slightly warmer temperature of $\sim350$ K. The extreme faintness and red Hubble Space Telescope and Spitzer Space Telescope colors of this object suggest it may be a link between the broader Y dwarf population and the coldest known brown dwarf WISE J0855$-$0714, and highlight our limited knowledge of the true spread of Y dwarf colors. We also present four additional Backyard Worlds: Planet 9 late-T brown dwarf discoveries within 30 pc.
