标题： 围绕巴纳德星的亚地球质量行星：TESS 光度学中没有凌日证据 显示英文标题

标题： A sub-Earth-mass planet orbiting Barnard's star: No evidence of transits in TESS photometry

摘要： 一颗环绕巴纳德星的超地球质量行星，被指定为巴纳德b，最近已被宣布。几乎在同一时间，凌日系外行星巡天卫星（TESS）发布的巴纳德星光学数据的首批数据在第80区段公布。我们探讨了巴纳德b在TESS光学数据中出现凌日的可能性。去趋势后的2分钟光曲线似乎很平坦，流量均方根为0.411 ppm。盲视和知情凌日曲线模型推断尝试表明没有发现巴纳德b或其他天体凌日的证据。这为巴纳德b的轨道倾角提供了3$\sigma$的87.9度上限。 显示英文摘要

摘要： A sub-Earth-mass planet orbiting Barnard's star, designated as Barnard b, has been recently announced. At almost the same time, the first photometric data of Barnard's star by the Transit Exoplanet Survey Satellite (TESS) was released in Sector 80. We explore the possibility of emergent transits of Barnard b in TESS photometry. The detrended 2 min light curve appears to be flat, with a flux root mean square of 0.411 parts per thousand. Attempts of blind and informed transit-curve model inference suggest no evidence of transiting Barnard b, or any other body. This provides a 3$\sigma$ upper bound of 87.9 degrees for the orbital inclination of Barnard b.