论文标题
新星壳的角度膨胀
Angular Expansion of Nova Shells
论文作者
论文摘要
Nova Shells可以为我们提供有关其距离，与情节和星际介质的相互作用以及射流形态的演变的重要信息。我们已经获得了五个Nova壳样品的窄带图像，即DQHER，FHSER，TAUR，V476CYG和V533HER，年龄在50至130年的范围内。将这些图像与合适的可用档案图像进行了比较，以得出其角膨胀率。我们发现样品中的所有NOVA壳仍处于自由膨胀阶段，这是可以预料的，因为喷射的质量比扫荡的杂物培养基的质量大7-45倍。 Nova Shells将在长达几百年的时间内保持自由扩展，从而减少了它们的时间散布到星际媒介中。
Nova shells can provide us with important information on their distance, their interactions with the circumstellar and interstellar media, and the evolution in morphology of the ejecta. We have obtained narrow-band images of a sample of five nova shells, namely DQHer, FHSer, TAur, V476Cyg, and V533Her, with ages in the range from 50 to 130 years. These images have been compared with suitable available archival images to derive their angular expansion rates. We find that all the nova shells in our sample are still in the free expansion phase, which can be expected, as the mass of the ejecta is 7-45 times larger than the mass of the swept-up circumstellar medium. The nova shells will keep expanding freely for time periods up to a few hundred years, reducing their time dispersal into the interstellar medium.
