论文标题
带有W波段过滤器的年轻近代物体的新型调查。 I. Ophiuchus和Perseus的过滤设计和新发现
A Novel Survey for Young Substellar Objects with the W-band Filter. I. Filter Design and New Discoveries in Ophiuchus and Perseus
论文作者
论文摘要
我们介绍了用于从Maunakea峰会上检测低质量恒星和棕色矮人的中型近红外过滤器的设计和实现。 W波段滤波器以1.45微米为中心，带通宽度为6％，旨在测量在具有光谱类型的M6及以后的物体中突出的H2O水吸收的深度。当与标准的J-波段光度法结合使用时，W波段滤波器的设计旨在确定频谱类型为$ \ $ \ $ \ $ \ $ 1.4的亚型，而L矮人和L矮人在很大程度上独立于表面重力和红色。该过滤器的主要应用程序正在使用恒星形成区域中的年轻近地点对物体的人口普查，并使用W波段选择大大减少了破坏宽带成像调查的红色背景恒星的污染。我们将过滤器部署在UH 88英寸望远镜上，以调查$ \ $ \ $ 3平方摄氏度。 NGC 1333，IC 348和Rho Ophiuchus恒星形成区域中。我们对W波段选定候选物的光谱随访导致了48个超速矮人的确认，成功率为89％，这证明了这种新的过滤器和选择方法的功效。
We present the design and implementation of a medium-band near-IR filter tailored for detecting low-mass stars and brown dwarfs from the summit of Maunakea. The W-band filter is centered at 1.45 micron with a bandpass width of 6%, designed to measure the depth of the H2O water absorption prominent in objects with spectral types of M6 and later. When combined with standard J- and H-band photometry, the W-band filter is designed to determine spectral types to $\approx$1.4 subtypes for late-M and L dwarfs, largely independent of surface gravity and reddening. This filter's primary application is completing the census of young substellar objects in star-forming regions, using W-band selection to greatly reduce contamination by reddened background stars that impede broad-band imaging surveys. We deployed the filter on the UH 88-inch telescope to survey $\approx$3 sq. deg. of the NGC 1333, IC 348, and rho Ophiuchus star-forming regions. Our spectroscopic followup of W-band selected candidates resulted in the confirmation of 48 ultracool dwarfs with a success rate of 89%, demonstrating the efficacy of this new filter and selection method.
