论文标题
NGC 2403领域中共生候选者2MASS J07363415+6538548的性质
The nature of the symbiotic candidate 2MASS J07363415+6538548 in the field of NGC 2403
论文作者
论文摘要
共生变量的新在线数据库包括几个特征不佳的物体和候选共生星，不仅以银河系的方式而且在其他星系中。本文提出的研究的目的是揭示2MASS J07363415+6538548的性质，该物体是NGC 2403领域中作为X射线源发现的对象，并暂时将其归类为共生候选者或cataclysmicmic可变。通过分析来自地面调查的可用光度数据，以及苔丝的高精度光度法，对Gaia卫星的显着星形测量以及从X射线到红外的其他调查的观察结果，我们发现该对象不是sommbiotic symbiotic star actables star nables actacmic actabic actabic actabial actacial actiact active k-k-type depe dwarf type dwarf。该恒星位于415 PC的距离，有效温度为4 275 K，光度为0.14 L $ \ odot $，质量为0.7 m $ \ odot $，半径为0.7 r $ \ odot $。它的旋转时间〜3天，是一个强大的X射线源，X射线光度为〜$ 10^{30} $ erg/s。旋律年代学和同句拟合证实了这颗恒星很年轻。
New Online Database of Symbiotic Variables includes several poorly characterised objects and candidate symbiotic stars, not only in the Milky Way but also in other galaxies. The goal of the research presented in this paper was to reveal the nature of 2MASS J07363415+6538548, the object discovered as an X-ray source in the field of NGC 2403, and tentatively classified as a symbiotic candidate or a cataclysmic variable. By analysis of available photometric data from ground-based surveys, together with high precision photometry from TESS, remarkable astrometric measurements of the Gaia satellite, and observations of other surveys spanning from X-rays to infrared, we have found that the object is not a symbiotic star nor a cataclysmic variable but rather an active K-type dwarf. The star is located in the distance of 415 pc, has an effective temperature of 4 275 K, luminosity of 0.14 L$\odot$, a mass of 0.7 M$\odot$, and radius of 0.7 R$\odot$. It has a rotational period ~ 3 days and is a strong X-ray source with the X-ray luminosity of ~ $10^{30}$ erg/s. Gyrochronology and isochrone fitting confirmed that the star is young.
