Results 21 to 30 of about 2,839 (226)

OMPEGAS: Optimized Relativistic Code for Multicore Architecture

Mathematics, 2022
The paper presents a new hydrodynamical code, OMPEGAS, for the 3D simulation of astrophysical flows on shared memory architectures. It provides a numerical method for solving the three-dimensional equations of the gravitational hydrodynamics based on ...
Elena N. Akimova, Vladimir E. Misilov, Igor M. Kulikov, Igor G. Chernykh   +3 more
doaj   +1 more source

Carnegie Supernova Project. II. Near-infrared Spectral Diversity and Template of Type Ia Supernovae

The Astrophysical Journal, 2023
We present the largest and most homogeneous collection of near-infrared (NIR) spectra of Type Ia supernovae (SNe Ia): 339 spectra of 98 individual SNe obtained as part of the Carnegie Supernova Project-II.
Jing Lu, Eric Y. Hsiao, Mark M. Phillips, Christopher R. Burns, Chris Ashall, Nidia Morrell, Lawrence Ng, Sahana Kumar, Melissa Shahbandeh, Peter Hoeflich, E. Baron, Syed Uddin, Maximilian D. Stritzinger, Nicholas B. Suntzeff, Charles Baltay, Scott Davis, Tiara R. Diamond, Gaston Folatelli, Francisco Förster, Jonathan Gagné, Lluís Galbany, Christa Gall, Santiago González-Gaitán, Simon Holmbo, Robert P. Kirshner, Kevin Krisciunas, G. H. Marion, Saul Perlmutter, Priscila J. Pessi, Anthony L. Piro, David Rabinowitz, Stuart D. Ryder, David J. Sand   +32 more
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SN 2019hcc: a Type II supernova displaying early O ii lines [PDF]

Monthly Notices of the Royal Astronomical Society, 2021
ABSTRACT We present optical spectroscopy together with ultraviolet, optical, and near-infrared photometry of SN 2019hcc, which resides in a host galaxy at redshift 0.044, displaying a sub-solar metallicity. The supernova spectrum near peak epoch shows a ‘w’ shape at around 4000 Å which is usually associated with O ii lines and is typical
Eleonora Parrag, Cosimo Inserra, Steve Schulze, Joseph Anderson, Ting-Wan Chen, Giorgios Leloudas, Lluis Galbany, Claudia P Gutiérrez, Daichi Hiramatsu, Erkki Kankare, Tomás E Müller-Bravo, Matt Nicholl, Giuliano Pignata, Regis Cartier, Mariusz Gromadzki, Alexandra Kozyreva, Arne Rau, Jamison Burke, D Andrew Howell, Curtis McCully, Craig Pellegrino   +20 more
openaire   +7 more sources

Cosmology with Type II supernovae [PDF]

International Journal of Modern Physics D, 2019
With the recent progresses on the Type II supernovae, we attempt to investigate whether there does exist new physics beyond the standard cosmological paradigm, i.e. the cosmological constant [Formula: see text] plus cold dark matter ([Formula: see text]CDM).
openaire   +2 more sources

Carnegie Supernova Project-II: Near-infrared Spectroscopic Diversity of Type II Supernovae [PDF]

The Astrophysical Journal, 2019
AbstractWe present 81 near-infrared (NIR) spectra of 30 Type II supernovae (SNe II) from theCarnegie Supernova Project-II(CSP-II), the largest such data set published to date. We identify a number of NIR features and characterize their evolution over time. The NIR spectroscopic properties of SNe II fall into two distinct groups.
S. Davis, E. Y. Hsiao, C. Ashall, P. Hoeflich, M. M. Phillips, G. H. Marion, R. P. Kirshner, N. Morrell, D. J. Sand, C. Burns, C. Contreras, M. Stritzinger, J. P. Anderson, E. Baron, T. Diamond, C. P. Gutiérrez, M. Hamuy, S. Holmbo, M. M. Kasliwal, K. Krisciunas, S. Kumar, J. Lu, P. J. Pessi, A. L. Piro, J. L. Prieto, M. Shahbandeh, N. B. Suntzeff   +26 more
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Progenitors of Type IIb Supernovae. II. Observable Properties [PDF]

The Astrophysical Journal, 2020
Abstract Type IIb supernovae (SNe IIb) present a unique opportunity for investigating the evolutionary channels and mechanisms governing the evolution of stripped-envelope SN progenitors due to a variety of observational constraints.
Niharika Sravan, Pablo Marchant, Vassiliki Kalogera, Dan Milisavljevic, Raffaella Margutti   +4 more
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Type II supernova energetics

The Astrophysical Journal, 1985
In this paper we exploit the fact that the collapsing core of a massive star, at the endpoint of its thermonuclear life, rapidly becomes hydrostatic after bouncing at nuclear densities. The energy transferred by pdV work from the inner unshocked core as it becomes hydrostatic to the bounce shock in the outer core is, to a good approximation, the ...
J. M. Lattimer, A. Burrows, A. Yahil
openaire   +1 more source

Dynamics of Type-II Supernovae [PDF]

International Astronomical Union Colloquium, 1996
Hydrodynamical simulations of type-II supernovae in one and two dimensions are performed for the revival phase of the delayed shock by neutrino energy deposition. Starting with a post-collapse model of the 1.31 Mʘ iron core of a 15 Mʘ star immediately after the stagnation of the prompt shock about 10 ms after core bounce, the models are followed for ...
H.-TH. Janka, E. M. Müller
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Type-II supernovae and neutrino magnetic moments [PDF]

Astroparticle Physics, 1999
11 pages, 5 figures, latex file, final version, references ...
Nunokawa, Hiroshi, Tomàs, Ricard, Furtado Valle, José Wagner   +2 more
openaire   +3 more sources

An updated Type II supernova Hubble diagram [PDF]

Astronomy & Astrophysics, 2018
We present photometry and spectroscopy of nine Type II-P/L supernovae (SNe) with redshifts in the 0.045 ≲z≲ 0.335 range, with a view to re-examining their utility as distance indicators. Specifically, we apply the expanding photosphere method (EPM) and the standardized candle method (SCM) to each target, and find that both methods yield distances that ...
Gall, E. E. E., Kotak, R., Leibundgut, B., Taubenberger, S., Hillebrandt, W., Kromer, M., Burgett, W. S., Chambers, K., Flewelling, H., Huber, M. E., Kaiser, N., Kudritzki, R. P., Magnier, E. A., Metcalfe, N., Smith, K., Tonry, J. L., Wainscoat, R. J., Waters, C.   +17 more
openaire   +5 more sources