Lesson plan
Shell collapsar
A shell collapsar is a proposed alternative explanation for the observations of black hole candidates. In this concept, matter collapses onto the event horizon, forming a compact shell of ultra-high density. Being of neutron star size (~11km), this hypothetical object strongly deflects light rays like a black hole, but has no central point-like singularity. The term shell collapsar was first proposed by Trevor W. Marshall in 2009 and 2012, then more firmly established in 2016. It predicts the existence of neutron star masses beyond the Tolman–Oppenheimer–Volkoff limit of , thus providing an alternative to stellar-mass black holes for the highly compact bodies that merge to produce gravitational wave signals. In 2011, Jun Ni explored the theoretical framework of neutron stars within the context of general relativity. He discusses solutions to the field equations that do not impose a maximum mass limit on neutron stars, which challenges the conventional understanding that there is a maximum mass beyond which a neutron star would collapse into a black hole. Ni introduced a new class of neutron stars that can exist beyond this traditional limit, suggesting that these stars could have significantly higher masses than previously thought.…
Article summary
A shell collapsar is a proposed alternative explanation for the observations of black hole candidates. In this concept, matter collapses onto the event horizon, forming a compact shell of ultra-high density. Being of neutron star size (~11km), this hypothetical object strongly deflects light rays like a black hole, but has no central point-like singularity. The term shell collapsar was first proposed by Trevor W. Marshall in 2009 and 2012, then more firmly established in 2016. It predicts the existence of neutron star masses beyond the Tolman–Oppenheimer–Volkoff limit of , thus providing an alternative to stellar-mass black holes for the highly compact bodies that merge to produce gravitational wave signals. In 2011, Jun Ni explored the theoretical framework of neutron stars within the context of general relativity. He discusses solutions to the field equations that do not impose a maximum mass limit on neutron stars, which challenges the conventional understanding that there is a maximum mass beyond which a neutron star would collapse into a black hole. Ni introduced a new class of neutron stars that can exist beyond this traditional limit, suggesting that these stars could have significantly higher masses than previously thought.…
Key claims
- date of establishment: 2016 — source: Wikipedia · confidence 0.95
Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- The record states that the date of establishment is "2016". What evidence would count against this claim?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
- Wikipedia https://en.wikipedia.org/w/index.php?oldid=1342470726
Key claims and bibliography are generated from the same tracked claims and sources as the article page.