Article
Astronomy & Astrophysics
Evgeni Grishin, Alexey Bobrick, Ryosuke Hirai, Ilya Mandel, Hagai B. Perets
Summary: Active galactic nuclei (AGNs) are important environments for stellar events such as mergers and explosions. Our analytical model studies shock evolution and breakout characteristics in AGN discs. Bright explosions occur in lower density regions and may be observable in future high-cadence transient searches.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Ainara Saiz-Perez, Alejandro Torres-Forne, Jose A. Font
Summary: This study presents a complementary approach to the Supernova Model Evidence Extractor (SMEE) based on dictionary learning for reconstructing and classifying core-collapse supernova (CCSN) signals according to their morphology. The results show that this approach can successfully classify different types of CCSN signals.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Fu-Lin Li, Yu Liu, Xiao Fan, Mao-Kai Hu, Xuan Yang, Jin-Jun Geng, Xue-Feng Wu
Summary: We study astrophysical events in active galactic nucleus (AGN) disks and find that stars located in the outer region of the AGN disk explode near the original migration starting points due to viscosity, instead of being accreted by the central black hole. AGN disks provide a dense environment for supernova explosions, which involve ejecta-disk interactions. The resulting supernovae in AGN disks are promising sources for UV and optical band detection, aiding in the investigation of AGN disks and high-energy transient occurrences.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Viktoria Frohlich, Zsolt Regaly, Jozsef Vinko
Summary: Investigated the formation of double neutron star (DNS) systems in binary systems with components above 8 solar masses. Found that fine-tuning of initial parameters is required for DNS formation via subsequent Type II supernova explosions. Our model can explain the formation of DNS systems with a separation greater than 2.95 au.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Y-Z Cai, A. Pastorello, M. Fraser, M. T. Botticella, N. Elias-Rosa, L-Z Wang, R. Kotak, S. Benetti, E. Cappellaro, M. Turatto, A. Reguitti, S. Mattila, S. J. Smartt, C. Ashall, S. Benitez, T-W Chen, A. Harutyunyan, E. Kankare, P. Lundqvist, P. A. Mazzali, A. Morales-Garoffolo, P. Ochner, G. Pignata, S. J. Prentice, T. M. Reynolds, X-W Shu, M. D. Stritzinger, L. Tartaglia, G. Terreran, L. Tomasella, S. Valenti, G. Valerin, G-J Wang, X-F Wang, L. Borsato, E. Callis, G. Cannizzaro, S. Chen, E. Congiu, M. Ergon, L. Galbany, A. Gal-Yam, X. Gao, M. Gromadzki, S. Holmbo, F. Huang, C. Inserra, K. Itagaki, Z. Kostrzewa-Rutkowska, K. Maguire, S. Margheim, S. Moran, F. Onori, A. Sagues Carracedo, K. W. Smith, J. Sollerman, A. Somero, B. Wang, D. R. Young
Summary: The study presents the spectroscopic and photometric analysis of five intermediate-luminosity red transients (ILRTs) with similar observational properties, potentially triggered by the explosion of a super-asymptotic giant branch star forming an electron-capture supernova.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Giuseppe Lucente, Leonardo Mastrototaro, Pierluca Carenza, Luca Di Luzio, Maurizio Giannotti, Alessandro Mirizzi
Summary: This study focuses on axions coupled to nucleons and photons through the nucleon electric-dipole moment portal. The authors refined the supernova axion emission induced by the nucleon EDM coupling and calculated the axion flux from future Galactic supernovae. These findings have important implications for understanding dark matter and cosmic background radiation.
Article
Astronomy & Astrophysics
L. Dessart, D. J. Hillier, T. Sukhbold, S. E. Woosley, H-T Janka
Summary: By conducting a set of 1D nonlocal thermodynamic equilibrium radiative transfer calculations, the study investigates the properties of nebular-phase Type Ibc supernovae. It is found that He stars synthesize less oxygen due to an enhanced mass loss rate, and the spectral properties of He stars with larger initial masses are similar to those of standard SNe Ibc.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Stefan Schacht, Amarjit Soni
Summary: Quantitative understanding of CP violation is crucial for revealing potential new physics. While some calculations suggest the need for new physics to explain the observations, the authors propose that scalar resonances within the Standard Model might enhance CP violation. Experimental information, especially on f(0)(1790), is limited and further data on these resonances is strongly recommended.
Article
Astronomy & Astrophysics
S. Sett, R. P. Breton, C. J. Clark, M. H. Kerkwijk, D. L. Kaplan
Summary: The majority of neutron stars are expected to be formed during supernovae, but only about half of supernova remnants are associated with compact objects. Various reasons like the orientation of the pulsar's radio beam, faintness, or positional offset might have caused previous surveys to miss true pulsar-SNR associations. This study aimed to find new pulsars in supernova remnants and explore their potential relationships, although no new pulsars were detected in the survey. The re-detection of a known pulsar and discussion on sensitivity as a key factor in the lack of pulsars in some remnants were the main conclusions of the study.
ASTRONOMY & ASTROPHYSICS
(2021)
Review
Physics, Nuclear
Brian D. Fields, Anton Wallner
Summary: Live radioisotopes found on Earth and Moon provide evidence for recent astrophysical explosions and offer insights into astrophysics, nuclear physics, and other fields.
ANNUAL REVIEW OF NUCLEAR AND PARTICLE SCIENCE
(2023)
Article
Astronomy & Astrophysics
Bailey Sykes, Bernhard Mueller, Isabel Cordero-Carrion, Pablo Cerda-Duran, Jerome Novak
Summary: Fallback supernovae and the collapsar scenario are important pathways to black-hole formation. In this study, a black-hole excision scheme is implemented for supernova simulations, and the long-time numerical stability is ensured by specific boundary conditions. The scheme is limited to a spherically symmetric metric, but multidimensional hydrodynamics can be treated. The simulations demonstrate black-hole formation in an 85M0 star and the fallback explosion of the same progenitor.
Article
Astronomy & Astrophysics
A. Fiore, T-W Chen, A. Jerkstrand, S. Benetti, R. Ciolfi, C. Inserra, E. Cappellaro, A. Pastorello, G. Leloudas, S. Schulze, M. Berton, J. Burke, C. McCully, W. Fong, L. Galbany, M. Gromadzki, C. P. Gutierrez, D. Hiramatsu, G. Hosseinzadeh, D. A. Howell, E. Kankare, R. Lunnan, T. E. Muller-Bravo, D. O' Neill, M. Nicholl, A. Rau, J. Sollerman, G. Terreran, S. Valenti, D. R. Young
Summary: The optical spectrophotometric observations of the nearby Type I superluminous supernova SN 2017gci reveal features that suggest a continuum distribution between slow- and fast-evolving SLSN I subclasses. The analysis of multiband light curves and synthetic LC fittings support the hypothesis that late interactions between ejecta and circumstellar material may be the power source for this supernova. Additionally, models suggest a possible progenitor star mass of 40 solar masses and either a magnetar or CSM interaction powering the SN 2017gci.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Engineering, Marine
Hao Tang, Zhao-Li Tian, Xin-Yang Ju, Ji-Tuan Feng, Yun-Long Liu, A-Man Zhang
Summary: This study investigates the transient fluid dynamics of explosions near a free surface through experiments and numerical simulations. The problem is classified into cavities and bubbles based on whether the explosion is exposed to the air. Explosions above the free surface generate hemispherical cavities that evolve into W-shaped ones. The simulations reveal that the distance parameter dominates the bubble's bursting and that the explosive equivalent and distance parameter compete to determine the cavity's closure. In addition, the impact pressure characteristics generated by the explosion near the free surface are also analyzed.
Article
Astronomy & Astrophysics
Jade Powell, Bernhard Mueller, David R. Aguilera-Dena, Norbert Langer
Summary: This study conducts three-dimensional simulations of magnetorotational supernovae and finds that the explosion energy depends on the initial magnetic field strength. It also shows the formation of nonaxisymmetric, magnetically collimated jets, which are crucial for our understanding of other phenomena with high explosion energies. These simulations can be detected by the planned Cosmic Explorer detector.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Yu Zhang, Tianmeng Zhang, Danzengluobu, Zhitong Li, Pinsong Zhao, Bingqing Zhang, Lin Du, Yinan Zhu, Hong Wu
Summary: We present optical photometric and spectroscopic observations of the nearby Type Ia supernova (SN) 2021hpr. The evolution of SN 2021hpr is similar to that of normal Type Ia supernovae (SNe Ia) with some exceptions. Based on the observations, we conclude that SN 2021hpr is a transitional object between high velocity (HV) and normal velocity (NV) SNe Ia.
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
(2022)
Article
Astronomy & Astrophysics
Adrian L. Melott, Brian C. Thomas, Brian D. Fields
INTERNATIONAL JOURNAL OF ASTROBIOLOGY
(2020)
Review
Multidisciplinary Sciences
Jennifer A. Johnson, Brian D. Fields, Todd A. Thompson
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2020)
Article
Multidisciplinary Sciences
Brian D. Fields, Adrian L. Melott, John Ellis, Adrienne F. Ertel, Brian J. Fry, Bruce S. Lieberman, Zhenghai Liu, Jesse A. Miller, Brian C. Thomas
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2020)
Article
Astronomy & Astrophysics
C. Tanner Murphey, Jacob W. Hogan, Brian D. Fields, Gautham Narayan
Summary: The observation of supernovae in the Milky Way is challenging due to dust extinction, with supernovae intrinsically concentrated in the Galactic plane and Type Ia events extending to higher latitudes.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Xilu Wang, Adam M. Clark, John Ellis, Adrienne F. Ertel, Brian D. Fields, Brian J. Fry, Zhenghai Liu, Jesse A. Miller, Rebecca Surman
Summary: The astrophysical sites where r-process elements are synthesized are still uncertain, but neutron star mergers and certain core-collapse supernovae are possible sources. Recent discoveries of Fe-60 and Pu-244 on Earth and the Moon suggest that astronomical explosions, possibly supernovae, have occurred near Earth within the last few million years. This has led to discussions on the origins of r-process elements and the potential history of the solar neighborhood, with the focus on distinguishing between supernova and kilonova scenarios for the synthesis of these elements.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Evgenii Chaikin, Alexander A. Kaurov, Brian D. Fields, Camila A. Correa
Summary: Recent studies have found live radioactive Fe-60 in deep-ocean samples, Antarctic snow, lunar regolith, and cosmic rays, indicating the possible involvement of one or multiple near-Earth supernova explosions in the formation of the Local Bubble. A simulation exploring the interaction between isolated supernovae and the interstellar medium suggests that the intensity and duration of Fe-60 accretion depend on the density of the interstellar medium and the trajectory of the Solar system.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Xilu Wang, Adam M. Clark, John Ellis, Adrienne F. Ertel, Brian D. Fields, Brian J. Fry, Zhenghai Liu, Jesse A. Miller, Rebecca Surman
Summary: Pu-244 has been found in deep-sea deposits from the past 10 million years, including two Fe-60 pulses from nearby supernovae. The origin of Pu-244, one of the heaviest r-process products, is debated. It could have been created in supernovae, although nucleosynthesis simulations suggest otherwise, or in an earlier kilonova event that spread Pu-244 in the nearby interstellar medium, later swept up by supernova debris. To investigate these possibilities, measurements of Pu-244, I-129, and Hf-182 in lunar regolith samples and deep-sea deposits are suggested.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Ian R. Brunton, Connor O'Mahoney, Brian D. Fields, Adrian L. Melott, Brian C. Thomas
Summary: The study focuses on the persistent X-ray emission from certain supernovae that have interactions with a dense circumstellar medium and are observed months and/or years after the initial outburst. These X-ray-luminous supernovae pose a significant threat to Earth-like planetary atmospheres and have larger ranges of influence than previously expected. They could also have lethal consequences up to about 50 parsecs away and impact the habitable zone in the galaxy. Follow-up X-ray observations are needed to shed light on the nature and evolution of the emission and clarify the danger these events pose for life in our galaxy and other star-forming regions.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Adrienne F. Ertel, Brian J. Fry, Brian D. Fields, John Ellis
Summary: A variety of data sources provide evidence for the recent explosions of near-Earth supernovae, including live Fe-60 found in deep-sea deposits, the lunar regolith, cosmic rays, and Antarctic snow. The duration of Fe-60 pulses in deep-sea sediments is estimated to be more than 1.6 million years, suggesting that Fe-60 arrives in the form of supernova dust rather than being entrained in the supernova blast wave plasma. This scenario is consistent with simulations that propose magnetic trapping of dust in supernova remnants. It also implies that the recent Fe-60 detections in cosmic rays complement the fragments of grains that have survived to reach the Earth and Moon.
ASTROPHYSICAL JOURNAL
(2023)
Editorial Material
Multidisciplinary Sciences
Brian D. Fields