THE WIRED SURVEY. II. INFRARED EXCESSES IN THE SDSS DR7 WHITE DWARF CATALOG
THE WIRED SURVEY. II. INFRARED EXCESSES IN THE SDSS DR7 WHITE DWARF CATALOG
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DOI：
10.1088/0067-0049/197/2/38
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发表时间：
2011-10
期刊：
影响因子：
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通讯作者：
J. Debes;J. Debes;D. Hoard;S. Wachter;D. Leisawitz;M. Cohen
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文献类型：
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作者：
J. Debes;J. Debes;D. Hoard;S. Wachter;D. Leisawitz;M. Cohen
随着广域红外巡天探测器（WISE）的发射，探测白矮星（wd）周围的行星碎片和褐矮星（bd）的新时代已经开始，WISE围绕退化的红外过剩（WIRED）巡天。《连线》巡天对WDs周围的次恒星物体和尘埃碎片非常敏感，距离超过100pc，远远超过了本地WDs的完整性水平。在本文中，我们提出了WISE、2微米全巡天（2MASS）、UKIRT红外深巡天（UKIDSS）和SDSS DR7光度表之间的初步斯隆数字巡天（SDSS）数据发布7 (DR7) WD表的相互关系。从大约18,000个输入目标中，WISE探测到的目标包括344个“裸”WD（仅探测WD光球），1020个候选WD+M矮双星，42个候选WD+BD系统，52个候选WD+尘盘系统，以及69个红外过量不确定的目标。我们通过合并光学、近红外和WISE光度法的光谱能量分布模型拟合对所有检测到的目标进行分类。其中一些检测可能是污染源在大（≈6″）WISE点扩散函数内的结果；我们对WD+BD和WD+候选磁盘的污染率进行初步估计，并为每个感兴趣的目标提供说明。这里提出的每一个候选者都应该用更高的角分辨率红外成像或红外光谱来确认。我们还概述了WISE光度波段探测到的WDs的观测特征，包括候选WD+M、WD+BD和WD+盘系统的相对频率。
With the launch of the Wide-field Infrared Survey Explorer (WISE), a new era of detecting planetary debris and brown dwarfs (BDs) around white dwarfs (WDs) has begun with the WISE InfraRed Excesses around Degenerates (WIRED) Survey. The WIRED Survey is sensitive to substellar objects and dusty debris around WDs out to distances exceeding 100 pc, well beyond the completeness level of local WDs. In this paper, we present a cross-correlation of the preliminary Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7) WD catalog between the WISE, Two-Micron All Sky Survey (2MASS), UKIRT Infrared Deep Sky Survey (UKIDSS), and SDSS DR7 photometric catalogs. From ∼18,000 input targets, there are WISE detections comprising 344 “naked” WDs (detection of the WD photosphere only), 1020 candidate WD+M dwarf binaries, 42 candidate WD+BD systems, 52 candidate WD+dust disk systems, and 69 targets with indeterminate infrared excess. We classified all of the detected targets through spectral energy distribution model fitting of the merged optical, near-IR, and WISE photometry. Some of these detections could be the result of contaminating sources within the large (≈6″) WISE point-spread function; we make a preliminary estimate for the rates of contamination for our WD+BD and WD+disk candidates and provide notes for each target of interest. Each candidate presented here should be confirmed with higher angular resolution infrared imaging or infrared spectroscopy. We also present an overview of the observational characteristics of the detected WDs in the WISE photometric bands, including the relative frequencies of candidate WD+M, WD+BD, and WD+disk systems.