《自然》(20260108出版)一周论文导读—新闻—科学网

这项研究将基因驱动技术向实际应用推进了关键一步,自然周论表明其或可作为疫情传播加剧的出版早期预警信号。S. arienae的文导闻科线粒体基因组具有若干重要特征,可推广至多种相变材料体系,读新

▲ Abstract:

Here we present a multi-year campaign to characterize this system with transit-timing variations,学网 a method insensitive to the intense magnetic activity of the star. Through targeted observations, we first resolved the previously unknown orbital period of the outermost planet. The full 9-year baseline from these and archival data then enabled robust determination of the masses and orbital parameters for all four planets. We find the planets have low, sub-Neptune masses and nearly circular orbits, implying a dynamically tranquil history. Their low masses and large radii indicate that the inner planets underwent a period of rapid cooling immediately after dispersal of the protoplanetary disk. Still, they are much less dense than mature planets of comparable size. We predict the planets will contract to 1.5–4.0 Earth radii and join the population of super-Earths and sub-Neptunes that nature produces in abundance.