Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Chris Nagele"'
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 1, p 11 (2024)
SN2018ibb is a recently observed hydrogen-poor superluminous supernova that appears to be powered by the decay of 30 M _⊙ of radioactive nickel. This supernova has been suggested to show hybrid signatures of a pair-instability supernova and an inte
Externí odkaz:
https://doaj.org/article/141aeec1e5df4c3fa156337ab9a85875
Autor:
Hideyuki Umeda, Chris Nagele
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 2, p 146 (2024)
In this paper, we revisit metal-enriched rotating pair-instability supernovae (PISNe) models for metallicities consistent with the Small Magellanic Cloud, the Large Magellanic Cloud (LMC), and 0.1 Z _⊙ . By calculating multiple models, we intend to
Externí odkaz:
https://doaj.org/article/e0b27106b6414bf6925dd3d516f7fe75
Autor:
Chris Nagele, Hideyuki Umeda
Publikováno v:
The Astrophysical Journal Letters, Vol 949, Iss 1, p L16 (2023)
GN-z11 is an unusually luminous high-redshift galaxy that was recently observed to have strong nitrogen lines while at the same time lacking traditional signatures of active galactic nucleus activity. These observations have been interpreted as a sup
Externí odkaz:
https://doaj.org/article/470e0a79283b4530a6eff263362589d8
Autor:
Chris Nagele, John D. Silverman, Tilman Hartwig, Junyao Li, Connor Bottrell, Xuheng Ding, Yoshiki Toba
Publikováno v:
The Astrophysical Journal, Vol 947, Iss 1, p 30 (2023)
The conditions under which galactic nuclear regions become active are largely unknown, although it has been hypothesized that secular processes related to galaxy morphology could play a significant role. We investigate this question using optical i -
Externí odkaz:
https://doaj.org/article/2a081049f572494c9535227743355787
Publikováno v:
Monthly Notices of the Royal Astronomical Society: Letters. 520:L72-L77
The origin of high-redshift quasars and their supermassive black hole engines is unclear. One promising solution is the collapse of a primordial supermassive star. Observational confirmation of this scenario may be challenging, but a general relativi
Publikováno v:
Monthly Notices of the Royal Astronomical Society.
The assembly of supermassive black holes poses a challenge primarily because of observed quasars at high redshift, but additionally because of the current lack of observations of intermediate mass black holes. One plausible scenario for creating supe
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 508:828-841
We calculate the neutrino signal from Population III supermassive star (SMS) collapse using a neutrino transfer code originally developed for core-collapse supernovae and massive star collapse. Using this code, we are able to investigate the SMS mass
Autor:
Chris Nagele
The advent of next generation neutrino detectors and dark matter direct detection experiments will, hopefully, shed light on the nature of the diffuse neutrino background at the MeV scale. Supernovae and collapsars are one well studied source of this
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6df3b5a6d52428151a8abc561d261898
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Observed supermassive black holes in the early Universe have several proposed formation channels in part because most of these channels are difficult to probe. One of the more promising channels, the direct collapse of a supermassive star has several
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2972a04d79596fd8acf2c0f4f12e6634
http://arxiv.org/abs/2205.10493
http://arxiv.org/abs/2205.10493
Publikováno v:
Journal of Physics A: Mathematical and Theoretical. 56:085301
We study quantum decoherence numerically in a system consisting of a relativistic quantum field theory coupled to a measuring device that is itself coupled to an environment. The measuring device and environment are treated as quantum, non-relativist