Results 41 to 50 of about 2,165 (169)

SN 2023ehl: A Normal Type Ia Supernova with High-velocity Features

The Astrophysical Journal
SN 2023ehl, a normal Type Ia supernova with a typical decline rate, was discovered in the galaxy UGC 11555 and offers valuable insights into the explosion mechanisms of white dwarfs.
Xiangyun Zeng, Lei Hu, Sheng Zheng, Xiaolong Li, Xiaoyu Luo, Sai Li, D. Andrew Howell, Yize Dong, Stefano Valenti, Liping Fu, Cheng Liu, Shiyu Li, Shuguang Zeng, Yao Huang, Yijing Luo, K. Azalee Bostroem, Curtis McCully, Ali Esamdin, Moira Andrews, Joseph R. Farah, Megan Newsome, Giacomo Terreran, Estefania Padilla Gonzalez, Emily Hoang, Aravind Pazhayath Ravi, Darshana Mehta, Nicolas Meza Retamal, Peng Zhang, Rongjun Zhang, Wang Li, Haonan Zhang   +30 more
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Optical observations of Type II supernovae

AIP Conference Proceedings, 2000
18 pages, 10 embedded figures, latex with aipproc style file included, to appear in "Cosmic Explosions" -- eds. S. Holt and W. W.
openaire   +2 more sources

JWST MIRI Imager Observations of Supernova SN 1987A

The Astrophysical Journal
There exist very few mid-infrared (IR) observations of supernovae (SNe) in general. Therefore, SN 1987A, the closest visible SN in 400 yr, gives us the opportunity to explore the mid-IR properties of SNe, the dust in their ejecta, and the surrounding ...
P. Bouchet, R. Gastaud, A. Coulais, M. J. Barlow, C. Fransson, P. J. Kavanagh, J. Larsson, T. Temim, O. C. Jones, A. S. Hirschauer, T. Tikkanen, J. A. D. L. Blommaert, O. D. Fox, A. Glasse, N. Habel, J. Hjorth, J. Jaspers, O. Krause, R. M. Lau, L. Lenkić, M. Meixner, O. Nayak, A. Rest, B. Sargent, R. Wesson, G. S. Wright, L. Colina, E. F. van Dishoeck, M. Güdel, Th. Henning, P.-O. Lagage, G. Östlin, T. P. Ray, B. Vandenbussche   +33 more
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A Luminous Red Supergiant and Dusty Long-period Variable Progenitor for SN 2023ixf

The Astrophysical Journal Letters, 2023
We analyze pre-explosion near- and mid-infrared (IR) imaging of the site of SN 2023ixf in the nearby spiral galaxy M101 and characterize the candidate progenitor star.
Jacob E. Jencson, Jeniveve Pearson, Emma R. Beasor, Ryan M. Lau, Jennifer E. Andrews, K. Azalee Bostroem, Yize Dong, Michael Engesser, Sebastian Gomez, Muryel Guolo, Emily Hoang, Griffin Hosseinzadeh, Saurabh W. Jha, Viraj Karambelkar, Mansi M. Kasliwal, Michael Lundquist, Nicolas E. Meza Retamal, Armin Rest, David J. Sand, Melissa Shahbandeh, Manisha Shrestha, Nathan Smith, Jay Strader, Stefano Valenti, Qinan Wang, Yossef Zenati   +25 more
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Magnetorotational Mechanism of Supernova Type II Explosion

International Astronomical Union Colloquium, 2005
SummaryResults of 2D simulations of the magnetorotational mechanism of supernova type II are presented. Amplification of toroidal magnetic field of the star due to differential rotation of the star leads to the transformation of the rotational (gravitational) energy to the energy of the supernova explosion. In our simulation the energy of the explosion
Moiseenko, S. G., Bisnovatyi-Kogan, G. S., Ardeljan, N. V.   +2 more
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Zeeman splitting in structure and composition of ultramagnetized spherical nuclei

Physics Letters B, 2018
Properties and mass distribution of ultramagnetized atomic nuclei that arise in heavy-ion collisions, magnetar crusts, during Type II supernova explosions and neutron star mergers are analyzed.
V.N. Kondratyev
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Light echoes - Type II supernovae

The Astrophysical Journal, 1987
Type II supernovae (SNs) light curves show a remarkable range of shapes. Data have been collected for the 12 Type II SNs that have light curve information for more than four months past maximum. Contrary to previous reports, it is found that (1) the decay rate after 100 days past maximum varies by almost an order of magnitude and (2) the light curve ...
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SN 2023ixf in Messier 101: Photo-ionization of Dense, Close-in Circumstellar Material in a Nearby Type II Supernova

The Astrophysical Journal Letters, 2023
We present UV and/or optical observations and models of SN 2023ixf, a type II supernova (SN) located in Messier 101 at 6.9 Mpc. Early time ( flash ) spectroscopy of SN 2023ixf, obtained primarily at Lick Observatory, reveals emission lines of H i , He i ...
W. V. Jacobson-Galán, L. Dessart, R. Margutti, R. Chornock, R. J. Foley, C. D. Kilpatrick, D. O. Jones, K. Taggart, C. R. Angus, S. Bhattacharjee, L. A. Braff, D. Brethauer, A. J. Burgasser, F. Cao, C. M. Carlile, K. C. Chambers, D. A. Coulter, E. Dominguez-Ruiz, C. B. Dickinson, T. de Boer, A. Gagliano, C. Gall, H. Gao, E. L. Gates, S. Gomez, M. Guolo, M. R. J. Halford, J. Hjorth, M. E. Huber, M. N. Johnson, P. R. Karpoor, T. Laskar, N LeBaron, Z. Li, Y. Lin, S. D. Loch, P. D. Lynam, E. A. Magnier, P. Maloney, D. J. Matthews, M. McDonald, H.-Y. Miao, D. Milisavljevic, Y.-C. Pan, S. Pradyumna, C. L. Ransome, J. M. Rees, A. Rest, C. Rojas-Bravo, N. R. Sandford, L. Sandoval Ascencio, S. Sanjaripour, A. Savino, H. Sears, N. Sharei, S. J. Smartt, E. R. Softich, C. A. Theissen, S. Tinyanont, H. Tohfa, V. A. Villar, Q. Wang, R. J. Wainscoat, A. L. Westerling, E. Wiston, M. A. Wozniak, S. K. Yadavalli, Y. Zenati   +67 more
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MOLYBDENUM AND RUTHENIUM IN THE GALAXY

Odessa Astronomical Publications, 2018
We present a brief overview of the molybdenum and ruthenium present-day nucleosynthesis calculations  and abundance determinations in stars belonging to different substructures (populations) in the Galaxy.
T. V. Mishenina, T. I. Gorbaneva
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Positron annihilation spectroscopy of clumpy structures 1. Type II young Supernova remnants

Physical Sciences and Technology, 2018
The clumpy structure of the SN 1987A ejecta revealed by numerous IR observations has been described. The simulation of the clump formation in the progenitor star’s explosion was performed.
D.N. Doikov, S.M. Andrievsky, A.V. Yushchenko   +2 more
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