论文标题
与Robo-AO一起在25台下的北极星伴侣的自适应光学普查
An Adaptive Optics Census of Companions to Northern Stars Within 25 pc with Robo-AO
论文作者
论文摘要
为了评估体积限制样品中光谱类型和种群跨恒星的多重性统计，我们为ROBO-AO的同伴进行了附近的恒星。我们报告了25 pc的观察结果，该观察结果在25 pc中的所有光谱类型中的观察结果。 $> -13^{\ circ} $搜索紧密的伴侣。我们检测到154个伴侣候选人，分别从$ \ sim $ 0.15 $''$'$ to 4.0 $''$，幅度差异为$δ$ m $ _ {\ textit {i'}} \ le $ 7，使用机器人适应性仪器robo robo-ao。我们证实了53名候选者Gaia EDR3天文测量的物理关联，仍有99个候选者待确认，并将2个排除为背景对象。我们通过搜索共同移动对象，在Gaia Edr3中搜索了共同移动对象，并搜索了高分辨率成像伴侣搜索，从而导致了另外147个同伴注册。在这项研究中报告的301位同伴中，有49个是新发现。在191颗恒星中，在加速度的河马-GAIA目录中具有显着的加速度测量值，我们检测到其中115个附近的伴侣，随着伴侣分离的降低，加速度的重要性增加。从这项调查中，我们报告以下多样性分数（与文献值相比）：40.9％$ \ pm $ 3.0％（44％）的FGK星和28.2％$ \ pm $ \ pm $ \ pm $ 2.3％（27％）（27％）（27％）（27％），以及5.5％$ \ pm $ \ pm $ 1.1％（11％）和3.9％（5％）（5％）（5％）（5％）（5％）（5％）（5％）（5％）（5％）（5％）（5％）。 分别。
In order to assess the multiplicity statistics of stars across spectral types and populations in a volume-limited sample, we censused nearby stars for companions with Robo-AO. We report on observations of 1157 stars of all spectral types within 25 pc with decl. $>-13^{\circ}$ searching for tight companions. We detected 154 companion candidates with separations ranging from $\sim$0.15$''$ to 4.0$''$ and magnitude differences up to $Δ$m$_{\textit{i'}}\le$7 using the robotic adaptive optics instrument Robo-AO. We confirmed physical association from Gaia EDR3 astrometry for 53 of the companion candidates, 99 remain to be confirmed, and 2 were ruled out as background objects. We complemented the high-resolution imaging companion search with a search for co-moving objects with separations out to 10,000 AU in Gaia EDR3, which resulted in an additional 147 companions registered. Of the 301 total companions reported in this study, 49 of them are new discoveries. Out of the 191 stars with significant acceleration measurements in the Hipparcos-Gaia catalog of accelerations, we detect companions around 115 of them, with the significance of the acceleration increasing as the companion separation decreases. From this survey, we report the following multiplicity fractions (compared to literature values): 40.9%$\pm$3.0% (44%) for FGK stars and 28.2%$\pm$2.3% (27%) for M stars, as well as higher-order fractions of 5.5%$\pm$1.1% (11%) and 3.9%$\pm$0.9% (5%) for FGK stars and M type stars, respectively.
