Astronomers detect signs of past mergers in NGC 3640, suggesting a history of consuming smaller galaxies.
Misshapen Galaxy NGC 3640 Identified as Cosmic Predator in New Study
Photo Credit: European Southern Observatory (ESO)
An elliptical galaxy located 88 million light-years from Earth has been observed displaying unusual characteristics, with astronomers identifying it as a cosmic predator. The latest images captured by the Very Large Telescope (VLT) at the European Southern Observatory (ESO) indicate that the galaxy, designated NGC 3640, has a history of consuming smaller galaxies and may soon engulf another. The galaxy's distorted structure and the faint, diffused light surrounding it serve as evidence of its turbulent past, as per reports. Positioned just above a smaller galaxy, NGC 3641, the larger body appears to be on a trajectory that could lead to a future merger. The study of such interactions provides insights into the evolutionary patterns of galaxies.
According to research published in Astronomy & Astrophysics, signs of previous mergers have been detected within NGC 3640. The structural distortions observed, coupled with the presence of older stellar populations, suggest that remnants of previously absorbed galaxies are embedded within its formation. Astronomers at the Italian National Institute for Astrophysics have analysed the remnants, with findings indicating that ancient stars from the original galaxy serve as markers of past collisions. The faint glow surrounding NGC 3640 is attributed to these past interactions, demonstrating the lasting effects of galactic mergers.
Reports suggest that while NGC 3641 remains intact, its eventual fate may align with the ongoing patterns of NGC 3640. As galaxies interact, their gravitational forces distort their structures, often leading to eventual mergers. Current observations indicate no immediate impact on NGC 3641, implying that significant interactions have yet to begin. ESO officials have stated that galaxies undergo structural changes over time due to the absorption of gas and stars from their surroundings. This process has been linked to the unique shape and features displayed by NGC 3640.
The gravitational forces exerted by approaching galaxies can trigger large-scale changes in their structures. Astronomers have been closely monitoring such interactions to gain a deeper understanding of galactic evolution. The observations made using the VLT provide an opportunity to study these cosmic processes in detail, with researchers continuing to track the potential merger between NGC 3640 and its smaller companion. The findings contribute to broader studies on the dynamic nature of galaxies and their role in shaping the universe over billions of years.
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