AUG 05, 2022 4:36 PM PDT

First Detection of a Compact, Massive Triple Star System

Two researchers at the Niels Bohr Institute at the University of Copenhagen are studying an usually compact system of three stars, possibly the first of its kind ever detected, known as TIC 470710327. The star system consists of a binary set of stars – or two stars that orbit each other – and one massive star which orbits the binary system. Tertiary – or three star – systems have been observed before, but this is the most massive one ever observed. Additionally, the massive stars in this triple system are extremely close together – or in a compact system.
 

 

The initial discovery of this unusual system of stars was actually made by amateur astronomers! These amateur astronomers were examining a public data set from NASA’s Transiting Exoplanet Survey Satellite (TESS) when they stumbled upon data that looked a little out of the ordinary. They then alerted professional astronomers to the anomalies that they observed who inspected the detection more closely and discovered that what was originally believed to be two stars was actually three!

 

The researchers were curious about this system and how the unique combination of a binary set of stars with a larger star orbiting the binary system formed. The results of their investigation have been published in the Monthly Notices of the Royal Astronomical Society Letters. They found that the orbital period of the binary system is approximately one day, and the combined mass of the two stars in the binary system is about 12 times the mass of our Sun. The tertiary star orbits the binary star system approximately 6 times in one year, which is very fast, and has a mass of approximately 16 times the mass of our Sun, which is extremely massive. Originally, the system was mistakenly identified as a binary system because it is very luminous, which made the smaller binary system appear as one star.

Artist's impression of HD 98800, a quadruple-star system. This system could be similar to the more massive triple-star system TIC 470710327, where there were once two binary systems, but one of them merged into one bigger star. Credit: NASA/JPL-Caltech/UCLA

The team ran numerical simulations to try to determine how this system formed. The simulations pointed to a formation mechanism that involved two binary systems that formed initially, where eventually one of the systems merged into one, more massive star. This could explain the origin of the triple system, but more investigations are needed to understand the true nature of the system.

 

Source: University of Copenhagen

About the Author
PhD in Astrophysics
I'm a stellar astrophysicist by training with a passion for formal and informal education and diversity and inclusion in STEM. I love to take a humanistic approach to my work and firmly believe that all of humanity is united under one sky.
You May Also Like
APR 18, 2022
Space & Astronomy
Neptune - The Distant Planet
APR 18, 2022
Neptune - The Distant Planet
Neptune, the eighth planet from the Sun – The Distant Planet. This bright blue orb hanging out near the edge of th ...
APR 30, 2022
Chemistry & Physics
Dying Stars Can Give Birth to Planets too
APR 30, 2022
Dying Stars Can Give Birth to Planets too
It has been known for ages that the Earth orbits around the Sun along with 7 more planets and dwarf planets among many o ...
MAY 17, 2022
Space & Astronomy
The Pioneering Project to Change How We Predict Space Weather
MAY 17, 2022
The Pioneering Project to Change How We Predict Space Weather
Researchers from West Virginia University (WVU) are leading a project that will improve our understanding of “spac ...
MAY 29, 2022
Space & Astronomy
Stars in other galaxies more massive than we thought
MAY 29, 2022
Stars in other galaxies more massive than we thought
The universe is a very big place full of awesome wonders that no human will ever see in its entirety, and that’s w ...
JUN 12, 2022
Space & Astronomy
NASA's DAVINCI mission to take the plunge through massive atmosphere of Venus
JUN 12, 2022
NASA's DAVINCI mission to take the plunge through massive atmosphere of Venus
Venus is one of the most awesome, mysterious, and deceiving planetary objects in our entire solar system. While its brig ...
AUG 03, 2022
Space & Astronomy
Moon lava pits might be toasty environments for future astronauts
AUG 03, 2022
Moon lava pits might be toasty environments for future astronauts
In a recent study published in Geophysical Research Letters, a collaborative research team from the University of Califo ...
Loading Comments...