因为鸭鸭嘌呤高，所以酷爱烤鸭的我努力克制自己，已经快两个月没吃烤鸭了。疫情刚开始的时候我对自己说，等解封了必须要干掉一只烤鸭庆祝一下，也不知道这个愿望多久能实现
秀哀文里的工藤新一真是个惹人怜爱的大冤种哈哈哈哈哈哈
琴哀，GS，啥也不说了，上头，不愧是琴爷，简简单单一句“好女孩”都能让我磕生磕死
我永远爱GRBS
最后顺便提一下因为下午睡觉错过了教研会的事
秀哀文里的工藤新一真是个惹人怜爱的大冤种哈哈哈哈哈哈
琴哀，GS，啥也不说了，上头，不愧是琴爷，简简单单一句“好女孩”都能让我磕生磕死
我永远爱GRBS
最后顺便提一下因为下午睡觉错过了教研会的事
#NASA每日一图# 2022-10-17 APOD:【X-Ray Rings Around a Gamma Ray Burst】
Why would x-ray rings appear around a gamma-ray burst? The surprising answer has little to do with the explosion itself but rather with light reflected off areas of dust-laden gas in our own Milky Way Galaxy. GRB 221009A was a tremendous explosion -- a very bright gamma-ray burst (GRB) that occurred far across the universe with radiation just arriving in our Solar System last week. Since GRBs can also emit copious amounts of x-rays, a bright flash of x-rays arrived nearly simultaneously with the gamma-radiation. In this case, the X-rays also bounced off regions high in dust right here in our Milky Way Galaxy, creating the unusual reflections. The greater the angle between reflecting Milky Way dust and the GRB, the greater the radius of the X-ray rings, and, typically, the longer it takes for these light-echoes to arrive.
Why would x-ray rings appear around a gamma-ray burst? The surprising answer has little to do with the explosion itself but rather with light reflected off areas of dust-laden gas in our own Milky Way Galaxy. GRB 221009A was a tremendous explosion -- a very bright gamma-ray burst (GRB) that occurred far across the universe with radiation just arriving in our Solar System last week. Since GRBs can also emit copious amounts of x-rays, a bright flash of x-rays arrived nearly simultaneously with the gamma-radiation. In this case, the X-rays also bounced off regions high in dust right here in our Milky Way Galaxy, creating the unusual reflections. The greater the angle between reflecting Milky Way dust and the GRB, the greater the radius of the X-ray rings, and, typically, the longer it takes for these light-echoes to arrive.
#天文酷图#
[2000年07月02日]
【 伽玛射线爆发：一个新的里程碑 】
伽玛射线爆发(GRBs)是在很偶然的状态下被发现的。在30年前的今天,人造卫星记录了第一个伽玛射线爆发。在上图的数据中,可以看到人造卫星上伽玛射线侦测器的记录突然增加,也就是宇宙间突然出现了一个伽玛射线闪光。其实,测得这个以及其他的伽玛射线爆发的Vela人造卫星,它的原始任务是用来监控地球上的核子试爆。用卫星上的侦测器,可以测得核子试爆所产生的X-光与伽玛射线。然而,如上图所示,Vela人造卫星所测得的伽玛射线并不是来自于地球的核子试爆,而是来自宇宙深处。目前,已经知道这个所谓的"宇宙伽玛射线爆发现象"是源自于遥远星系的超强爆炸。可是,究竟在什么样的情形之下才会产生这样强的伽玛射线爆发呢?
信息来自：苏汉宗（成功大学 物理学系）
提供: R. Klebesadel, I. Strong & R. Olson (LANL), Vela Project
[2000年07月02日]
【 伽玛射线爆发：一个新的里程碑 】
伽玛射线爆发(GRBs)是在很偶然的状态下被发现的。在30年前的今天,人造卫星记录了第一个伽玛射线爆发。在上图的数据中,可以看到人造卫星上伽玛射线侦测器的记录突然增加,也就是宇宙间突然出现了一个伽玛射线闪光。其实,测得这个以及其他的伽玛射线爆发的Vela人造卫星,它的原始任务是用来监控地球上的核子试爆。用卫星上的侦测器,可以测得核子试爆所产生的X-光与伽玛射线。然而,如上图所示,Vela人造卫星所测得的伽玛射线并不是来自于地球的核子试爆,而是来自宇宙深处。目前,已经知道这个所谓的"宇宙伽玛射线爆发现象"是源自于遥远星系的超强爆炸。可是,究竟在什么样的情形之下才会产生这样强的伽玛射线爆发呢?
信息来自：苏汉宗（成功大学 物理学系）
提供: R. Klebesadel, I. Strong & R. Olson (LANL), Vela Project
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