论文标题
使用Maxi/GSC，RXTE/ASM和Ginga/ASM观察到的NS-LMXB的长期变化
Decades' long-term variations in NS-LMXBs observed with MAXI/GSC, RXTE/ASM and Ginga/ASM
论文作者
论文摘要
我们研究了几十年的长期X射线变化，其中包含中子星（NS-LMXB）的明亮低质量X射线二进制物。 Maxi/GSC和RXTE/ASM的光曲线覆盖$ \ sim $ 26年，高质量的X射线光曲线是从33 NS-LMXB中获得的。其中，与Ginga/ASM一起，两个来源（GX 3 $+$ 1和GX 9 $+$ 1）显示出明显的正弦变化，$ \ sim 5 $ yr和$ \ sim 10 $ yr在34年的光线曲线中。他们的X射线照明量为$（1-4）\ times10^{37} $ erg s $^{ - 1} $在NS-LMXB的光度分布的中间。其他七个来源（Ser X-1，4U 1735--444，GX 9 $+$ 9，4U 1746 $ - $ 37，4U 1708 $ - $ 40，4U 1822 $ - $ 000和1A 1246 $ - $ -588）也具有类似的正弦变化，尽管有类似的正弦变化，但cliles（glibsitiles offiles（gliless）（glituiles（glituile，opplitude，operputie，operce，execiple and apeciple and apeas and apeas）是可变的）。与已知的轨道周期相结合的21个来源，长期正弦变异的可能原因可能是辐射对供体恒星引起的传质周期。
We investigated the decades' long-term X-ray variations in bright low-mass X-ray binaries containing a neutron star (NS-LMXB). The light curves of MAXI/GSC and RXTE/ASM covers $\sim$ 26 yr, and high-quality X-ray light curves are obtained from 33 NS-LMXBs. Among them, together with Ginga/ASM, two sources (GX 3$+$1 and GX 9$+$1) showed an apparent sinusoidal variation with the period of $\sim 5$ yr and $\sim 10$ yr in the 34 yr light curve. Their X-ray luminosities were $(1-4)\times10^{37}$ erg s$^{-1}$ in the middle of the luminosity distribution of the NS-LMXB. Other seven sources (Ser X-1, 4U 1735--444, GX 9$+$9, 4U 1746$-$37, 4U 1708$-$40, 4U 1822$-$000, and 1A 1246$-$588) have also similar sinusoidal variation, although the profiles (amplitude, period, and phase) are variable. Compering the 21 sources with known orbital periods, a possible cause of the long-term sinusoidal variation might be the mass transfer cycles induced by the irradiation to the donor star.
