قالب وردپرس درنا توس
Home / Science / Astronomers now track four potential interstellar objects in our outer solar system

Astronomers now track four potential interstellar objects in our outer solar system




<div _ngcontent-c14 = "" innerhtml = "

Using detailed computer models of asteroid-type objects between the Sun and Jupiter, two Harvard University researchers find that at least four known objects have external origins in our solar system

This artist's impression shows the first interstellar object discovered in the solar system, Oumuamua. Credit: ESA / Hubble, NASA, ESO, M. Kornmesser

After being gravitationally confined, the four is potentially interstellar Objects (201

1 SP25, 2017 RR2, 2017 SV13 and 2018 TL6) spend most of their time between the orbits of Jupiter and Neptune, but they approach the sun through the neighborhood of the earth.

In a work that Monthly Notice submitted by the Royal Astronomical Society the Harvard co-authors Amir Siraj and Abraham Loeb compare the orbital features of theoretical objects mi t high affinity to those of the centaurs the most similar population of known asteroids.

"We find that there should be hundreds of Oumuamua-sized interstellar objects that can be identified by Centaur-like orbits," the authors write. 1I / 2017 U1 Oumuamua, the first true interstellar object, was discovered on 19 October 2017 by the Pan-Starrs University of Hawaii Telescope. However, the authors point out that their calculations should include at least 66 possible interstellar objects with a diameter of about 100 meters up to a size of 10 kilometers.

And all these possible interstellar interpolators should be detected by the LSST (Large) Synoptic Survey Telescope), currently under construction in Chile.

"The Sun-Jupiter system serves as a fishing net collecting interstellar objects," said Harvard University astrophysicist Abraham Loeb. " At one point in time, there are several thousand objects in the solar system ."

Our article, Loeb says, shows this by focusing on objects that are strongly inclined to the plane of the solar system and on opposite sides Orbits to the planets we can isolate interstellar objects.

As for the four authors who have identified the authors as potential interstellar objects to date?

" We do not know if they are comets, asteroids, or artifacts ," said Amir Siraj, a Harvard University student in astrophysics. We will not be able to know until these objects return to Earth. Siraj notes that of the four 2018 TL6 objects, close access will be available in another twenty years.

Could they be of artificial origin?

"We have no evidence that these [four] objects are unnatural." This is a point, "Siraj said.

They pass the earth in a period of 20 to 120 years. It will be another 20 years before we can photograph one of them, he says. That is, unless someone designs a flyby mission that will visit one or more of them. The most likely source of interstellar objects are planetary systems that they eject during the formation and development process.

And as for Oumuamua, which classifies NASA as a raised, rocky, cigar-shaped object with a slightly reddish hue?

NASA Spitzer infrared telescope data rule out typical comet activity, Loeb says. And he says it also sets a limit on the size of Oumuamua, which in turn implies a shiny surface that reflects at least ten times more than a typical asteroid.

"These results are inconsistent with the properties of comets and asteroids in the solar system are fully consistent with an artificial origin," said Loeb.

[>

Using detailed computer models of asteroid-type objects between Sun and Jupiter, two Harvard University researchers find that at least four objects are known to have an origin outside of our solar system.

The impression of this artist shows the first interstellar object discovered in the solar system, Oumuamua. . Credit: ESA / Hubble, NASA, ESO, M. Kornmesser

After the four potentially interstellar objects – 2011 SP25, 2017 RR2, 2017 SV13 and 2018 TL6 – were in gravity, they probably spent most of their time between the tracks of Jupiter and Neptune. However, during their closest approach to the sun, they traverse the neighborhood of the earth.

In a work presented to the Monthly Notices of the Royal Astronomical Society the Harvard co-authors Amir Siraj and Abraham Loeb compiled the orbital characteristics of theoretical objects of high inclination with those of the centaurs, the most similar population of known asteroids.

"We find that there should be hundreds of Oumuamua-sized interstellar objects that can be identified by Centaur-like orbits," the authors write. 1I / 2017 U1 Oumuamua, the first true interstellar object, was discovered on 19 October 2017 by the Pan-Starrs University of Hawaii Telescope. However, the authors point out that their calculations should include at least 66 possible interstellar objects with a diameter of about 100 meters up to a size of 10 kilometers.

And all these possible interstellar interpolators should be detected by the LSST (Large) Synoptic Survey Telescope), currently under construction in Chile.

"The Sun-Jupiter system serves as a fishing net collecting interstellar objects," said Harvard University astrophysicist Abraham Loeb. " At one point in time, there are several thousand objects in the solar system ."

Our article, Loeb says, shows this by focusing on objects that are strongly inclined to the plane of the solar system and on opposite sides Orbits to the planets we can isolate interstellar objects.

As for the four authors who have identified the authors as potential interstellar objects to date?

" We do not know if they are comets, asteroids, or artifacts ," said Amir Siraj, a Harvard University student in astrophysics. We will not be able to know until these objects return to Earth. Siraj notes that of the four 2018 TL6 objects, close access will be available in another twenty years.

Could they be of artificial origin?

"We have no evidence that these [four] objects are unnatural." This is a point, "Siraj said.

They pass the earth in a period of 20 to 120 years. It will be another 20 years before we can photograph one of them, he says. That is, unless someone designs a flyby mission that will visit one or more of them. The most likely source of interstellar objects are planetary systems that they eject during the formation and development process.

And as for Oumuamua, which classifies NASA as a raised, rocky, cigar-shaped object with a slightly reddish hue?

NASA Spitzer infrared telescope data rule out typical comet activity, Loeb says. And he says it also sets a limit on the size of Oumuamua, which in turn implies a shiny surface that reflects at least ten times more than a typical asteroid.

"These results are inconsistent with the properties of comets and asteroids in the solar system are fully consistent with an artificial origin," said Loeb.


Source link