Key Takeaways
1. The Circinus galaxy, located 13 million light-years away, contains an active supermassive black hole emitting significant infrared light.
2. Recent studies reveal that about 87% of the infrared emissions come from dust near the black hole, contradicting earlier beliefs about outflows.
3. The research utilized advanced techniques like the Aperture Masking Interferometer on Webb’s NIRISS to overcome observational challenges.
4. This study produced the first infrared interferometric image of an extragalactic object captured from space.
5. The findings could help improve understanding of other black holes in the universe and were published in the journal Nature.
The Circinus galaxy is situated approximately 13 million light-years from our planet. This galaxy hosts an active supermassive black hole. Earlier studies indicated that it emitted an unusual amount of infrared light. Scientists believed that much of this infrared emission originated from the outflows driven by the black hole. Yet, they were unable to pinpoint the exact source of this excess light.
New Discoveries
Recent findings from Webb’s study provide a fresh perspective, challenging earlier assumptions. It was discovered that nearly 87% of the intense infrared emissions are generated by dust that is in close proximity to the black hole, with less than 1% attributed to the hot, dusty outflows. This implies that the radiant dust is primarily feeding the black hole, while the rest, which is about 12%, comes from more distant regions.
Advanced Techniques
The research utilized the Aperture Masking Interferometer on Webb’s NIRISS (Near-Infrared Imager and Slitless Spectrograph) instrument. This innovative interferometric method enabled astronomers to bypass the challenges posed by the brightness of surrounding stars and the luminous matter near the black hole. The dense structure of the torus, which is the doughnut-shaped ring circling the black hole created by accreting gas and dust, also previously hindered visibility of the black hole’s inner area.
Pioneering Observations
By using the interferometric technique, researchers produced a clear image of the galaxy’s center. This marks the first time an infrared interferometric image of an extragalactic object has been captured from space. Additionally, it’s the first occasion where Webb’s high-contrast mode was utilized on a galaxy outside of the Milky Way. This method could pave the way for unraveling the enigmas surrounding other black holes throughout the universe. The findings were published in the journal Nature.
Source:
Link










