قالب وردپرس درنا توس
Home / Science / Sagittarius discovered lurking deep in the solar system | Science | News

Sagittarius discovered lurking deep in the solar system | Science | News



Sagittarius in astronomical terms is a space rock that has the features of asteroids and comets. They are believed to originate outside of Neptune’s orbit and inward toward the Sun.

They rummaged around the solar system for millions of years and was the cause of Late Heavy Bombardment from about 3.8 billion years before asteroids landed on Earth.

They have the rock-like bodies of an asteroid, while they emit gas and vapor in their story, called a coma, like a comet.

When these gases are chemically present, the centaurs are considered active, and only 18 of these active centaurs have been found since the first was discovered in 1927.

Now another one could be added to the list after astronomers discovered Centaur 201

4 OG392 lurking near Jupiter’s orbit.

Finding and keeping a centaur from the point of view is extremely difficult because they are millions of miles away and orbit within hundreds of thousands of cosmic rock blocks.

Researchers have found the latest centaurs by analyzing archived images from a series of telescopes, as well as new data collected from the Dark Energy Camera at the Inter-American Observatory and the Telescope. the Walter Baade at the Las Campanas Observatory.

Astronomer Colin Chandler, from the University of Northern Arizona, said: “Our paper reported the discovery of activity emanating from Centaur 2014 OG392, based on the archival images we discovered. , plus our new observational evidence obtained by the Dark Energy Camera at Inter-American Observatory in Cerro Tololo, Chile, the Walter Baade Telescope at the Las Campanas Observatory in Chile and the Raw Camera Large block at the Lowell Observatory’s Channel Discovery Telescope in Happy Jack, Arizona.

“We have developed a new technique that combines observational measurements – for example, color and dust mass – with modeling efforts to estimate characteristics such as volatile sublimation and fund dynamics. religion of the object. “

According to research published in the Astrophysical Journal Letters, the technique involves using an algorithm specially developed to find evidence of solids transforming into gas, which have the consequences of comatose.

“We found a person in a coma up to 400,000 kilometers away,” said Chandler [248,548 miles] since 2014 OG392, and our analysis of sublimation processes and dynamics persistence show that carbon dioxide and / or ammonia are the most likely candidates to induce activity on this centaur. and other active centaurs.

“We have developed a new technique that combines observational measurements, for example, color and dust mass, with modeling efforts to estimate characteristics such as volatile sublimation and dynamics. the trajectory of the object. “

It was the closely watched centauri activity that astronomers at the Small Planet Center reclassified it as a comet and would be known as “C / 2014 OG392 (PANSTARRS)”.

“I am delighted that the Small Planet Center has given a new comet designation that matches the activity we have detected on this anomaly,” added Chandler.




Source link