AI 中文总结
天文学家对TOI-7475开展光谱后续观测，通过TESS数据与PST1望远镜光谱，发现一颗12.0±1.0倍木星质量的偏心轨道热木星，其偏心率或暗示系统年龄较轻。
AI 中文摘要
我们对TOI-7475开展了首次光谱后续观测，报告发现了一颗行星质量的伴星。TESS观测到其周期为3.25天的凌星现象，亮度下降幅度为0.006星等，持续约4.5小时。主星为F5型光谱，质量约为1.48倍太阳质量（M$_{\rm \u2299}$）。我们使用PST1望远镜采集了24条高分辨率阶梯光栅光谱，采用Wilson-Devinney方法对TESS测光数据和我们的视向速度进行分析，得到该伴星的行星质量为12.0±1.0倍木星质量（M$_{\rm \rm jup}$）。其半长轴小、轨道周期短，归类为热木星，轨道呈椭圆形，偏心率为0.16。该偏心率在光谱数据中清晰可见，可能表明该系统年龄较轻。
英文摘要
We present the first spectroscopic follow-up for TOI-7475, and report the detection of a planetary-mass companion. Transits with a period of 3.25 days were observed by TESS. The dips in brightness are 0.006 mag and last approximately 4.5 hours. The host star is a spectral type F5 with a mass of approximately 1.48 M$_{\odot}$. We collected 24 high resolution echelle spectra using the PST1 telescope. Analysis of the TESS photometric data and our radial velocities was performed using the Wilson-Devinney method. We obtained a planetary mass of the companion of 12.0$\pm$1.0 M$_{\mathrm{jup}}$. The small semi-major axis and short orbital period classify the planet as a Hot Jupiter. Its orbit is elliptical with an eccentricity of 0.16. The ellipticity is evident in the spectroscopic data and could indicates the young age of the system.
Comments9 pages, 2 figures, 3 tables, submitted to Acta Astronomica
