Unearthing the secrets of IRAS 07299−1651
Astronomers have discovered two massive protostars forming a binary system within their natal cloud, located 5,300 light-years from Earth. Through detailed observation, they measured the stars’ highly elongated orbits around each other. The celestial pair, known as IRAS 07299−1651, offers a rare glimpse into the early stages of star formation.
Probing the massive protostars with advanced telescopes
The Atacama Large Millimeter/submillimeter Array (ALMA) has observed these two young massive protostars for nearly eight years. Complementary data from the Very Large Array (VLA), the James Webb Space Telescope (JWST), and the Very Large Telescope (VLT) enhance these ALMA observations. They reveal that the stars follow a stretched orbit, while their surrounding disks are oriented differently.
Massive stars typically do not exist alone. Nearly 90 percent are part of binary or multiple systems, influencing their evolution through strong winds, radiation, and ultimately supernova explosions. However, IRAS 07299−1651 is unique, as its stars are still in the protostar phase, continuing to gather material from their environment.
Revisiting the dynamics with new observations
In 2019, ALMA observations offered the first dynamic constraints by directly measuring the pair’s movements. Initial models suggested a more straightforward dynamic, with the stars forming from a rotational disk. However, eight additional years of observations have transformed this understanding. The orbits indicate a close encounter situation rather than simultaneous formation.
Tracking motion: A detailed glimpse from ALMA
IRAS 07299−1651’s distant location means its protostars show minimal apparent movement despite their complex orbits. ALMA recorded these subtle shifts over eight years, uncovering a highly eccentric orbit for the stars, contrasting with the near-circular paths typical of binary systems. This configuration suggests a prior close interaction.
The massive protostars remain approximately 200 astronomical units apart—demonstrating a significant distance compared to Earth’s orbit around the Sun.
Complementary observations complete the picture
While ALMA provided essential positional data, other telescopes filled in the missing details. The VLA captured radio observations of the jets from the massive protostars, offering insights into their orientation. The JWST observed in infrared, unveiling structures obscured by dust. Additionally, the VLT supplied more infrared data, further tracking the jets.
The JWST observed in infrared, unveiling structures obscured by dust. Discover mysterious red glows over the ocean and marvel at the wonders of celestial photography.
According to Ruben Fedriani, an astronomer at the Instituto de Astrofísica de Andalucía and co-author of the research paper, “Each telescope revealed a different piece of the puzzle. The combination of radio and infrared observations provides the most exquisite detail on the formation of this massive protobinary system.”
Clear skies!
Source: diyphotography.net
Frequently asked questions
What kind of orbit do the protostars in IRAS 07299−1651 have?
The protostars in IRAS 07299−1651 have highly elongated, eccentric orbits around each other. This is in contrast to the near-circular paths typical of binary systems, suggesting a prior close interaction.
How far apart are the protostars in the system?
The massive protostars in the system remain approximately 200 astronomical units apart. This demonstrates a significant distance compared to Earth’s orbit around the Sun.
Which telescopes were used to observe the protostars?
The Atacama Large Millimeter/submillimeter Array (ALMA) conducted observations of the protostars. Additional observations were provided by the Very Large Array (VLA), the James Webb Space Telescope (JWST), and the Very Large Telescope (VLT).