TNG上使用HARPS-N的GAPS计划LXXVII。存在冷木星时小近距行星的发生率
The GAPS Programme with HARPS-N at TNG LXXVII. Occurrence rates of small close-in planets in the presence of cold Jupiters
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中文总结 AI 辅助
该研究旨在构建含冷木星系统样本，评估小近距行星存在情况及相关性。通过挑选恒星、汇编数据、拟合计算等方法，确认多颗行星并划分类型，得出不同类型行星发生率，发现内部稳定系统中小行星发生率高，与此前研究相符。
中文摘要 AI 辅助
背景。我们太阳系由内小行星（ISP）和外巨行星构成的结构是否常见尚不清楚。了解ISP与外冷巨行星之间是否存在关联是评估与我们太阳系结构相似的系统普遍程度的关键。目的。本研究旨在构建一个通过径向速度（RV）检测到的拥有冷木星（CJ，a > 1 au，msini > 0.1 M$_J$）的大型同类系统样本，并评估是否存在额外的ISP（P < 400 d，3 < msini < 31.7 M$_{\oplus}$），研究这两类天体之间的相关性。方法。我们挑选了137颗已知拥有CJ的恒星，其中23颗还含有热木星并单独处理。汇编了来自各种仪器的数据，包括GAPS计划中使用HARPS-N收集的未发表数据，并使用PyORBIT进行一致拟合。我们得出RV检测图并计算ISP的发生率，用两个独立代码交叉验证结果。将样本分为子组以评估系统参数如何影响行星发生率。结果。我们确认了137个系统中已有的213颗行星，并识别出6个新候选行星。根据质量和周期将它们分为海王星（10 < m sin i < 31.7 M$_{\oplus}$）和超级地球（3 < m sin i < 10 M$_{\oplus}$），以及热（1 < P < 10 d）、暖（10 < P < 100 d）和冷（100 < P < 400 d）行星。我们发现热、暖、冷海王星的发生率分别为5%、13%和12%，热和暖超级地球的发生率分别为11%和16%。内部区域动态稳定的系统中小行星发生率更高。这些发现与之前关于平均恒星金属度和质量下ISP与CJ之间无强关联的研究一致，并表明热木星可能更常与外部巨行星相关。
英文摘要
Context. The architecture of our Solar System, with inner small planets (ISPs) and outer giants, may or may not be common. Understanding whether a correlation exists between ISPs and outer cold giants is key to evaluating how common systems with a similar architecture to our own are. Aims. This study aims to build a large, homogeneous sample of systems hosting cold Jupiters (CJs, a > 1 au, msini > 0.1 M$_J$) detected via radial velocities (RVs), and to assess the presence of additional ISPs (P < 400 d, 3 < msini < 31.7 M$_{\oplus}$), studying the correlation between these two types of objects. Methods. We selected 137 stars known to host a CJ, including 23 which also harbor a hot Jupiter and were treated separately. Data from various instruments were compiled, including unpublished data gathered with HARPS-N within the GAPS program, and consistently fitted using PyORBIT. We derived RV detection maps and calculated occurrence rates for ISPs, cross-validating results with two independent codes. The sample was divided into subgroups to evaluate how system parameters influence planet occurrence. Results. We confirmed the 213 already known planets in the 137 systems and also identified six new candidates. We divided them, based on mass and period, into Neptunes (10 < m sin i < 31.7 M$_{\oplus}$) and Super-Earths (3 < m sin i < 10 M$_{\oplus}$), and into hot (1 < P < 10 d), warm (10 < P < 100 d), and cool (100 < P < 400 d). We found occurrences of 5%, 13%, and 12% for hot, warm, and cool Neptunes, respectively, and 11% and 16% for hot and warm Super-Earths, respectively. Systems with dynamically stable inner regions show higher rates of small planets. These findings are consistent with previous studies showing no strong correlation between ISPs and CJs at average stellar metallicity and mass, and suggest that HJs may be more commonly associated with external giants.
