A distant and faint host star?

The speculation that the Sun has a distant companion star has always existed in the astronomical community. Pen & Fun & Pavilion www.biquge.info

Judging from the evolutionary process of the birth and development of known stars, the Sun belongs to more than two generations of stars. This is due to the fact that the planets of the solar system contain heavy metals, and they need the nuclear reaction of a generation of stars to conceive. And the remnants of the main star that gave birth to the sun have not yet been discovered.

It should be noted that the evolution process of stars is generally a nebula-star-nebula-star ......, alternating between nebula-nebula.

We see that the Orion Nebula is 16 light-years long, so how big is the nebula that gave birth to the Sun?

The closest star to us is Proxima Centauri at a distance of 4.22 light-years.

With the exception of Proxima Centauri, the stars in the nearby solar system are listed in descending order:

1. α Centauri (αCen) 4.3 light-years

2. Barnard's 5.86 light-years

3. Wolf359 7.7 light-years

4. Brandt 2147 stars (BD+36°) 8.2 light years

5. UV Cetus (Luyten 726-8) 8.4 light years

6. Sirius (α Canis Major) 8.7 light-years

7. Ross154 is 9.5 light-years

8. Ross248 star (Ross248) 10.4 light years

9. ε star (εEri) 10.8 light years

10. Ross128 star (Ross128) 10.9 light years

Referring to the Pillar of Creation of the Eagle Nebula in the Constellation Megali, the nebula that gave birth to the Sun and the surrounding stars should also be very large.

The nebula that gave rise to the solar system could be the remnants of a multi-star explosion. Since the more massive the lifespan, the shorter the lifetime, those stars may not be 100 million years old, but may be tens of millions or even millions of years.

So, what would be the stellar remnant that gave birth to the solar system's native nebula? Where is it?

Stars that give birth to nebulae of this size usually form black holes after exploding. Black holes have always been a problem in astronomical observations, but the evolution of stars around the solar system has been determined, and the surrounding galactic dust has been blown away by stellar winds. It is unrealistic to find that the black holes that gave birth to the solar system by observing the accretion process.

And the solar system orbits the Milky Way every 250 million years, and what happens in the middle is unknown. If the black hole were like a tramp, it might have been stripped away from the stellar companion system around the solar system.

If this black hole persists, it may be the host star of the solar system and its surrounding stellar companion system.

The practical significance of examining this distant and faint host star lies in concerns about the future of the solar system.

From the perspective of life on Earth, a mass extinction occurs about 62 million years. The five known mass extinctions have different causes, the previous being the dinosaur extinction event, due to an asteroid impact. Now it is said that the sixth mass extinction has begun, caused by human exploitation of the earth.

The reason for considering the existence of the host star is that if this black hole is close to the solar system, it will inevitably cause gravitational disturbance to the solar system, so the era of concentrated comets and asteroids hitting the earth like the early major collisions of the solar system may come, even if Jupiter blocks the comet and the moon blocks most of the asteroids, the impact on the Earth may still occur. After all, we have observed Comet Shoemaker-Levi 9 and know about the existence of craters in the Yucatan Peninsula.

Is it possible to observe this distant and faint host star?

At present, it is possible to observe the relative motion of the stellar companion system around the solar system to see if there are any regularities, such as the existence of deterministic elliptical orbits and common centers of motion, but such a problem may take a long time. Observations of the movement of the surrounding stars are recorded, but it is not known if this aspect is involved.

If the star companion system around the solar system does not have a host star, then everyone is happy; If so, don't worry, because the results of stellar motion are often counted in 10,000 years; For human beings, it is unimaginable how far it will develop in 10,000 years, and even if it is a thousand years later, human beings will probably have already walked out of the cradle of life on the earth.

2016.5.30