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arXiv 1707.04037astro-ph.SRastro-ph.EP
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用修正的${\it WISE}$测光法研究有和没有行星的恒星的红外过量

Infrared excesses in stars with and without planets using revised ${\it WISE}$ photometry

Raul F. Maldonado, Miguel Chavez, Emanuele Bertone, Fernando Cruz-Saenz de Miera

摘要:

我们提出了一个分析的潜在流行的中红外过度的恒星和没有行星的同伴。基于${\it WISE}$卫星探测到的恒星扩展数据库,我们研究了两个恒星样本:通过比较22 $μ$ m和12 $μ$ m处观测到的通量比,我们确定了光球层上存在过剩($f_{22}/f_{12}$)与相应的合成值,来自经典模型光球的结果。我们发现,在22 $μ$ m(2个过量)的恒星样本中,有行星的恒星的探测率为0.85 $\%$,而没有行星的恒星的探测率为0.1 $\%$(1个探测)。两个样本之间的检出率差异在统计学上不显著,这一结果与文献中发现的定义${\it WISE}$观测所涵盖波长范围内过量的不同方法无关。作为一个额外的结果,我们发现,${\it WISE}$通量需要一个标准化程序,使它们与合成数据兼容,可能指出修订的${\it WISE}$数据校准。

英文摘要:

We present an analysis on the potential prevalence of mid infrared excesses in stars with and without planetary companions. Based on an extended database of stars detected with the ${\it WISE}$ satellite, we studied two stellar samples: one with 236 planet hosts and another with 986 objects for which planets have been searched but not found. We determined the presence of an excess over the photosphere by comparing the observed flux ratio at 22 $μ$m and 12 $μ$m ($f_{22}/f_{12}$) with the corresponding synthetic value, derived from results of classical model photospheres. We found a detection rate of 0.85$\%$ at 22 $μ$m (2 excesses) in the sample of stars with planets and 0.1$\%$ (1 detection) for the stars without planets. The difference of the detection rate between the two samples is not statistically significant, a result that is independent of the different approaches found in the literature to define an excess in the wavelength range covered by ${\it WISE}$ observations. As an additional result, we found that the ${\it WISE}$ fluxes required a normalisation procedure to make them compatible with synthetic data, probably pointing out a revision of the ${\it WISE}$ data calibration.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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