The military vehicle drove slowly along the winding mountain road, and it was not until the military vehicle drove into the gate of the Xinglong Observatory that Zhou Chen knew what the officer's eldest brother meant by "Shunlu". Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

"Let's go too." Zhou Chen said to Yang Xi beside him with a smile.

Then in front of the security booth at the entrance, the two were stopped by armed police with loaded guns.

However, Zhou Chen did not panic, he made an appointment in advance for this trip, only to see him calmly dial a phone call, and it didn't take long for Li Kaiyan to run out of it to pick them up!

After not seeing him for a few months, Li Kaiyan has tanned a lot, and the body hair on his body is slightly plump, which at first glance looks a bit like an orangutan released from an African wildlife reserve.

After completing the registration, the three of them walked into the base of the Xinglong Observatory together.

The specific location of the observatory is on the top of a small peak at the southern foot of Wuling Mountain, and it is still some distance to walk, and there are green trees along the way, and the sound of small birds chirping from time to time can be heard.

"Zhou Chen, I heard that you have become famous recently, I know that you are a piece of gold, and you will shine wherever you go."

Walking on the stone-paved path, Li Kaiyan said very enthusiastically.

Of course, he also noticed Yang Xi beside Zhou Chen, but with a little brain, he knew that this girl must have a great relationship with Zhou Chen, and it must be his girlfriend, so he didn't ask more.

The three of them didn't have long to walk before three towering buildings appeared in their field of vision.

Among them, the upper end of the building on the left side is crowned with a white ball, the height is about 30 meters, the other two buildings are in the shape of "one high and one low", the low end is slightly higher than the white ball, located in the middle of the three buildings, and the high end has the appearance of more than 50 meters, the two buildings are connected together to support a "long tube" shaped single-channel corridor, which is actually the "mirror tube" of the telescope.

Li Kaiyan pointed to the thirty-meter-high white sphere and said, "Inside that sphere is the core astronomical telescope 'LAMOST' of the Xinglong Observatory' and its active reflection Schmidt 'correction mirror' and its horizon device, which is the first-stage receiver of the astronomical telescope!" ”

"This receiver is made up of 24 hexagonal active aspheric sub-mirrors with a diagonal diameter of 1.1 meters, and when the observation signal falls to the receiver, it will be reflected by the receiver to the low-end entrance of the 'long tube'." As he spoke, Li Kaiyan pointed to the middle of the three towering buildings.

"The signal enters from the low end, and then arrives at the high end of the 'long tube', the main mirror is composed of 37 sub-mirrors, and after the secondary reflection, the signal returns along the original path, and finally focuses on the 'focal plane' located at the center of the low end of the 'long tube', where there is an optical fiber transmission device, which can transmit the signal to the spectrum analysis room below."

Li Kaiyan explained as he walked, and Zhou Chen nodded suddenly in understanding.

The original three towering buildings together constitute a complete "LAMOST telescope" device, the sphere is the correction mirror of the light signal, used to receive the weak radiation in the sky, the "long tube" in the mirror is the main mirror of the telescope, after it is reflected, the light signal is enhanced and focused on the "focal plane", and then through the "focal plane" on the 4000 optical fibers to the middle building below the 20 spectrometers of various types for data analysis.

As for the tallest building that holds up the "long tube", it is actually the office of the on-site staff.

Li Kaiyan didn't take Zhou Chen to the LAMOST telescope for the first time, because an extra pass was required to enter there.

So Li Kaiyan took Zhou Chen and the two to the staff living area of the Xinglong Observatory base, where Zhou Chen saw the two soldiers who came up with them were unloading from the car with several staff members.

The base implements paramilitary management, and the base's three meals a day and other materials must be distributed by the military.

What surprised Zhou Chen was that he found that among the people who worked, there were actually a few blonde and blue-eyed whites, as well as two Indians with the appearance of an Indian ethnic group, and even a yellow-skinned guy, who obviously looked like an Iranian Persian.

"Don't think it's strange, these are all foreign experts who come here for scientific research and observation, and you will slowly get used to it after a long time."

Li Kaiyan explained with a smile.

"I didn't expect you to really come in!"

At this time, the two soldiers saw Zhou Chen and Yang Xi, and the two soldiers were a little surprised that they could really enter the base, and then smiled at Zhou Chen and continued to get busy.

"Let's go, my mentor and An Fengsheng are already waiting for you in the office!" Li Kaiyan urged, and then took Zhou Chen to an office.

As Li Kaiyan said, his mentor and An Fengsheng had been waiting for Zhou Chen for a long time, and when they saw Zhou Chen coming in, both of them greeted them very warmly.

"Professor Luo, Senior An, hello!"

Li Kaiyan's tutor's surname is Luo, so Zhou Chen officially called him Professor Luo, and as for An Fengsheng, based on his background in the same school, he called him Senior An as he did last time they met.

Professor Luo and An Fengsheng may not know much about Zhou Chen before, but since the "Law of Black Hole Thermodynamics" came out, it can be said that there are few people in the theoretical community who have not heard of the name Zhou Chen. In addition, Li Kaiyan bragged in the ears of the two from time to time about how iron his relationship with Zhou Chen was, Professor Luo and An Fengsheng were familiar with Zhou Chen's knowledge and his personality.

So this time, when Zhou Chen said that he wanted to visit Professor Luo and An Fengsheng at the Xinglong Observatory, the two of them were extremely welcome and quickly arranged everything for him.

Several people didn't meet much, and after greeting each other a few words, Zhou Chen went straight to the point and threw out the purpose of the trip.

He took out an arranged booklet from his bag and solemnly handed it to Professor Luo and An Fengsheng.

"This is the research results that I have recently sorted out and revised, and this time I specially came to invite the two of you to watch, and I also asked the two of you to give me advice and help correct the axe!"

The brochure handed over by Zhou Chen is naturally his third paper, but it is more appropriate to say that this is not so much a thesis as a theoretical model!

"The Equation of State for Radiative Propagation of Celestial Bodies?"

Professor Luo and An Fengsheng couldn't help but look at Zhou Chen in surprise when they saw the words on the cover of the booklet.

As the name suggests, this is an article related to the observation of celestial radiation, and of course the main theme is definitely the theoretical study of the propagation state of radiation.

Radiation propagation is an observational discipline, so all its theoretical models must go through a large number of celestial observations, and only when the final data are consistent with the experimental results can they be considered correct and credible.

Professor Luo and An Fengsheng were surprised, because Zhou Chen's previous titles were mainly focused on the field of basic theoretical research, whether it was "The Law of Thermodynamics of Black Holes", which caused widespread discussion, or "The Simultaneous Transitivity of the Theory of Relativity", which was published in the domestic journal "Physics" and basically did not cause much repercussions, they are all contents of basic theoretical research.

Why did you suddenly turn to the actual measurement this time?

Although his content is still theoretical, it is related to actual measurements, isn't it?

With a hint of interest, Professor Luo and An Fengsheng opened the booklet and read it.

……

After a long time, the two saw the shock in each other's eyes, and they couldn't believe that Zhou Chen actually started the radiation transfer equation this time.

It is important to know that the solution of the radiative transfer equation is the connection between the physical parameters of the celestial matter and the spectral lines we last observed, and it forms an important basis for astronomical observation and analysis together with the equation of state in the propagation process of radiation.

This time, Zhou Chen actually reconstructed a set of theoretical formulas about radiation, from the radiation transfer equation to the radiation equation of state, and organically combined them to form a unified theoretical system.

This theoretical system involves a lot of formulas, and the complexity is simply not something that can be done by one person.

They skimmed over the middle section and pulled out the final equation part.

The equation is complex and involves many parameters. Putting aside whether Zhou Chen's final deduced "Equation of State for Radiation Propagation" was correct, the violent and frenzied equation structure alone made them look at Zhou Chen like monsters.

Under Professor Luo's signal, An Fengsheng called up the parameters of the recent observation for verification, and after some complicated calculations, An Fengsheng stopped the calculation and looked at the screen in a daze.

"How did it turn out?" Professor Luo asked.

An Fengsheng shook his head, he frowned and pointed to a blurry nebula screen on the screen.

"Professor Luo, you see, this is the active galactic nucleus that we observed last month, do you look at its spectral characteristics and radiation characteristics, is it a little blurry?"

Professor Luo nodded: "This is not surprising, because the radio radiation and high-frequency radiation of active galactic nuclei are anisotropic, which means that when we look at the appearance of such active galactic nuclei, the features we see are actually related to the angle from which we observe it, and these observational representations may present a function of perspective." Therefore, there may be some uncertainty. ”

"Then Professor Luo, you can come and see this again!"

An Fengsheng typed in a few supplementary formulas with one click, and then the picture changed, and suddenly became a lot clearer, and at the same time presented a spectrum diagram!

"Ahh Li Kaiyan exclaimed.

Professor Luo's expression also became serious, and he said in disbelief: "It's not an active galaxy nucleus, its spectral lines actually hide strong and wide emission lines and huge spectral line redshifts, this is actually a quasar!" ”

There is a difference between quasars and active galactic nuclei, but the difference between the two is very limited and can easily be confused in observations.

"That's right, this astronomical observation, which we mistook for an active galactic nucleus, is actually a quasar!" A hint of loss flashed across An Fengsheng's face, but he quickly perked up again, and he pulled up another picture.

"If you look at this line map of the 'Seifert Galaxy, a low-light active galactic nucleus', this is a picture of a real active galactic nucleus, with strong emission lines and a small redshift in its spectral lines, which at first glance looks very similar to the spectral line diagram of this quasar, but if you look closely, you will find that there is still a difference from the spectral line diagram that has just been processed!"

"The stellar absorption properties of this just-processed quasar line map are very weak, and the narrow line is even weaker relative to the broad line than in the case of the 'Seifert Galaxy'! And this obvious ultraviolet superphenomenon proves that it is actually a quasar! ”

Professor Luo sighed: "I really didn't expect that after observing for so long, the galaxy that I thought was an active galactic nucleus turned out to be a quasar!" ”

"But it's also important to correct the mistake as soon as possible!"

An Fengsheng couldn't help but smile and said: "And this also shows that the Equation of State of Celestial Radiation Propagation can be proved to be correct in practical terms, at least it is more reliable than the previous observation theory!" ”

He looked at Zhou Chen, his face full of amazement.