双星

Fifteen of its new discoveries appeared to be so-called supergiant high-mass X-ray binaries.

其新发现的15个被称作巨星-大质量X射线双星

These binary systems consist of a neutron star orbiting around a supergiant star.

这些双星系统由一个巨星和围绕其的中子星组成。

The theory of accretion disks are important for many astrophysical phenomena, including Quasars, active galatic nucleic, X-ray binary stars, and young stellar objects. The most important branch of accretion djsk theory is the stability properties of djsks. It is widely considered that the luminosity variations of various astronomical objects are associated with the instability of accretion disk. The viscosity plays an important role in the accretion disk theory, and magnetic field exists commonly in astronomical phenomena. A more realistic analysis of the stabihty of the accretion disk should include both the radjal and azimuthal perturbations because of the strong shear of viscous flow.In this paper, according to the luminosity Variations of Various astronomical objects, we study the radial-azimuthal instability of an isothermal with magnetic field. We find that the radial and azimuthal fields B〓,B〓 are mainly responsible for enhancing the instability of the magneto-acoustic modes and non-axisymmetric modes,and that pulsational oscillations are larger in the radial than in the Z direction. The model may be useful in explaining the periodic light variation of FU orionis and. T Tauri stars.

在许多天体物理现象中，例如活动星系核，X-射线双星和年青的恒星理论中，吸积盘理论起着重要的作用，而吸积盘理论中的一个重要分支是吸积盘的不稳定性理论，普遍认为活动天体的周期，准周期光变现象与吸积盘的不稳定性有关，在吸积盘理论中，粘滞起着重要的作用，而磁场是天体物理中普遍存在的现象，对于几何薄吸积盘不稳定性分析，由于强剪切流的缘故，应该包括径向和环向扰动两个方面，本文结合天体物理中的各种周期，准周期光变现象，研究了含磁场的等温薄吸积盘的径向-环向振荡不稳定性，结果表明：磁场的径向和环向分量对磁声模和非轴对称模的不稳定性的增加起着主要的作用，且径向振荡大于轴向振荡，所得结果有利于解释FU Orionis和T Tauri Stars的周期光变现象。

"Ma Jiajun running shoes "--, if appreciate walking flies " make people dress comfortable ", it is the pursuit of double star all the time.

"马家军跑鞋"———体味步履如飞"让人们穿着舒适"，一直是双星的追求。

The nova phenomenon generally occurs in a binary system that has as one member a very hot white dwarf.

新星这种现象一般发生在双星系统中，其中一颗子星是非常热的白矮星。

Such a supernova is thought to be the result of the explosion of a small and dense star - a white dwarf - inside a binary system.

这一类超新星被认为是双星系统内的一颗小而致密的恒星——白矮星——的爆发所致。

Gemma, aka Alphecca, is an eclipsing binary system.

它还有另外一个名字—— Alphecca ，阿拉伯语中，它的意思是'盘中的亮点'，这颗真珠，抑或是'盘中的亮点'，是一个消逐中的双星系统。

Other, somewhat more astronomically savvy people might name the Magellanic Clouds as the closest galaxies. The Large and Small Magellanic Clouds are two small, blobby galaxies that actually orbit the Milky Way, and are about 180,000 and 210,000 light-years away, respectively.

另一些，在天文上了解更多点的人可能会将麦哲伦星系定为最近的星系，大，小麦哲伦星系是两个小的双星星系，让人惊讶的是，他们实际上在距银河18万到21万光年处围绕绕银河运行着。

Because the core mass of the AGB star is remarkably large at low metallicity.

对于AGB星初始质量小于3M_☉且初始轨道距离较远的双星系统，白矮星不能从受污染的星上吸积充足的物质，因此不能形成AIC，其伴星只受到AGB前身星的污染，从而形成s-过程元素超丰的星。

Mina dos Estrellas is now an abandoned gold mine in the mountains of Michoacan, Mexico.

双星矿场坐落在墨西哥米却肯的群山之中，是一个现已被废弃的金矿。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。