January 21, 2025
12:00PM
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1:00PM
Hybrid: PRB 4138 & Zoom
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2025-01-21 12:00:00
2025-01-21 13:00:00
CCAPP Seminar - Mohit Bhardwaj
Title: Decoding the Mysteries of Fast Radio Bursts: Diverse Origins and Future ProspectsSpeaker: Mohit Bhardwaj (CMU)Abstract: Fast radio bursts (FRBs) are among the most intriguing mysteries in modern astronomy, with their origins remaining elusive even 18 years after their discovery. Theories explaining FRBs span a wide range, from catastrophic events to more persistent, non-cataclysmic origins. In recent years, magnetar-based models have gained traction, yet questions persist about whether most FRBs are the result of rapid, post-supernova processes or if they emerge from recycled compact objects over longer timescales. Recent findings support young progenitor models, underpinned by host galaxy demographics and the recognition of significant selection biases. However, the detection of FRBs in green-valley and quiescent galaxies (albeit from a small sample size) suggests that a more complex and diverse range of formation pathways may be at play. This raises critical questions: Can core-collapse supernovae alone account for the observed host galaxy distribution? Do the data indicate multiple formation channels within the prompt category, beyond just massive star explosions? And how do selection biases influence our understanding of these mechanisms? In this talk, I will explore these questions through the lens of observations from over two dozen well-localized FRBs in the local Universe. I will present new insights into the potential origins of these enigmatic bursts, emphasising the role of host galaxy environments and the influence of selection effects. Finally, I will discuss what the next few years may hold for FRB research, highlighting how upcoming observations could bridge critical gaps in our understanding of stellar evolution and the lifecycle of compact objects.
Hybrid: PRB 4138 & Zoom
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2025-01-21 12:00:00
2025-01-21 13:00:00
CCAPP Seminar - Mohit Bhardwaj
Title: Decoding the Mysteries of Fast Radio Bursts: Diverse Origins and Future ProspectsSpeaker: Mohit Bhardwaj (CMU)Abstract: Fast radio bursts (FRBs) are among the most intriguing mysteries in modern astronomy, with their origins remaining elusive even 18 years after their discovery. Theories explaining FRBs span a wide range, from catastrophic events to more persistent, non-cataclysmic origins. In recent years, magnetar-based models have gained traction, yet questions persist about whether most FRBs are the result of rapid, post-supernova processes or if they emerge from recycled compact objects over longer timescales. Recent findings support young progenitor models, underpinned by host galaxy demographics and the recognition of significant selection biases. However, the detection of FRBs in green-valley and quiescent galaxies (albeit from a small sample size) suggests that a more complex and diverse range of formation pathways may be at play. This raises critical questions: Can core-collapse supernovae alone account for the observed host galaxy distribution? Do the data indicate multiple formation channels within the prompt category, beyond just massive star explosions? And how do selection biases influence our understanding of these mechanisms? In this talk, I will explore these questions through the lens of observations from over two dozen well-localized FRBs in the local Universe. I will present new insights into the potential origins of these enigmatic bursts, emphasising the role of host galaxy environments and the influence of selection effects. Finally, I will discuss what the next few years may hold for FRB research, highlighting how upcoming observations could bridge critical gaps in our understanding of stellar evolution and the lifecycle of compact objects.
Hybrid: PRB 4138 & Zoom
America/New_York
public
Title: Decoding the Mysteries of Fast Radio Bursts: Diverse Origins and Future Prospects
Speaker: Mohit Bhardwaj (CMU)
Abstract:
Fast radio bursts (FRBs) are among the most intriguing mysteries in modern astronomy, with their origins remaining elusive even 18 years after their discovery. Theories explaining FRBs span a wide range, from catastrophic events to more persistent, non-cataclysmic origins. In recent years, magnetar-based models have gained traction, yet questions persist about whether most FRBs are the result of rapid, post-supernova processes or if they emerge from recycled compact objects over longer timescales.
Recent findings support young progenitor models, underpinned by host galaxy demographics and the recognition of significant selection biases. However, the detection of FRBs in green-valley and quiescent galaxies (albeit from a small sample size) suggests that a more complex and diverse range of formation pathways may be at play. This raises critical questions: Can core-collapse supernovae alone account for the observed host galaxy distribution? Do the data indicate multiple formation channels within the prompt category, beyond just massive star explosions? And how do selection biases influence our understanding of these mechanisms?
In this talk, I will explore these questions through the lens of observations from over two dozen well-localized FRBs in the local Universe. I will present new insights into the potential origins of these enigmatic bursts, emphasising the role of host galaxy environments and the influence of selection effects. Finally, I will discuss what the next few years may hold for FRB research, highlighting how upcoming observations could bridge critical gaps in our understanding of stellar evolution and the lifecycle of compact objects.
