Results 11 to 20 of about 2,165 (169)

The Type II-P Supernova 2019mhm and Constraints on its Progenitor System

The Astrophysical Journal, 2023
We present pre- and postexplosion observations of the Type II-P supernova (SN II-P) 2019mhm located in NGC 6753. Based on optical spectroscopy and photometry, we show that SN 2019mhm exhibits broad lines of hydrogen with a velocity of −8500 ± 200 km s ...
J. Vazquez, C. D. Kilpatrick, G. Dimitriadis, R. J. Foley, A. L. Piro, A. Rest, C. Rojas-Bravo   +6 more
doaj   +1 more source

The rise-time of Type II supernovae [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
We investigate the early-time light-curves of a large sample of 223 type II supernovae (SNe) from the Sloan Digital Sky Survey and the Supernova Legacy Survey. Having a cadence of a few days and sufficient non-detections prior to explosion, we constrain rise-times, i.e.
González Gaitán, Santiago, Tominaga, N., Molina, J., Galbany, Lluis, Bufano, Filomena, Anderson, Joseph P., Gutierrez, C., Förster, F., Pignata Libralato, Giuliano, Bersten, Melina, Howell, D. A., Sullivan, M., Carlberg, R., De Jaeger, Thomas, Hamuy Wackenhut, Mario, Baklanov, P. V., Blinnikov, S. I.   +16 more
openaire   +11 more sources

SN 2018gj: A Short Plateau Type II Supernova with Persistent Blueshifted Ha Emission

The Astrophysical Journal, 2023
We present an extensive, panchromatic photometric (UV, optical, and near-IR) and low-resolution optical spectroscopic coverage of a Type IIP supernova SN 2018gj that occurred on the outskirts of the host galaxy NGC 6217.
Rishabh Singh Teja, Avinash Singh, D. K. Sahu, G. C. Anupama, Brajesh Kumar, Tatsuya Nakaoka, Koji S Kawabata, Masayuki Yamanaka, Ali Takey, Miho Kawabata   +9 more
doaj   +1 more source

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
doaj   +1 more source

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
openaire   +5 more sources

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
openaire   +3 more sources

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