Results 71 to 80 of about 48,593 (219)

Radiative Acceleration of Dense Circumstellar Material in Interacting Supernovae

The Astrophysical Journal, 2023
Early-time light curves/spectra of some hydrogen-rich supernovae (SNe) provide solid evidence of the existence of confined, dense circumstellar matter (CSM) surrounding dying massive stars. We numerically and analytically study the radiative acceleration
Daichi Tsuna, Kohta Murase, Takashi J. Moriya   +2 more
doaj   +1 more source

Constraints on cosmic-ray acceleration and transport from isotope observations [PDF]

, 2000
Observations from the Cosmic Ray Isotope Spectrometer (CRIS) on ACE have been used to derive constraints on the locations, physical conditions, and time scales for cosmic-ray acceleration and transport.
Binns, W. R., Christian, E. R., Cummings, A. C., George, J. S., Hink, P. L., Klarmann, J., Leske, R. A., Lijowski, M., Mewaldt, R. A., Stone, E. C., von Rosenvinge, T. T., Wiedenbeck, M. E., Yanasak, N. E.   +12 more
core   +1 more source

An Account of Luck, Fortune, and Fate

Philosophy and Phenomenological Research, EarlyView.
ABSTRACT Luck is one of our most important concepts. In this article, I first argue that extant accounts of luck are deeply flawed. I then argue for a hybrid account of luck that is based around the difference between skill‐based and non‐skill‐based events.
Jesse Hill
wiley   +1 more source

SN 2024aecx: A Double-peaked Rapidly Evolving Type IIb Supernova at 11 Mpc

The Astrophysical Journal
We present the results of low-resolution spectroscopic and densely sampled multiband photometric follow-up of supernova (SN) 2024aecx. The SN was discovered in the spiral galaxy NGC 3521 (distance ∼ 11 Mpc) within a day after the explosion.
Xingzhu Zou, Brajesh Kumar, Rishabh Singh Teja, D. K. Sahu, Xinlei Chen, Avinash Singh, Weikang Lin, Xiangkun Liu, Dezi Liu, Hrishav Das, Mridweeka Singh, G. C. Anupama, Yu Pan, Guowang Du, Helong Guo, Tao Wang, Xufeng Zhu, Jujia Zhang, Yuan Fang, Chenxu Liu, Kaushik Chatterjee, Yuan-Pei Yang, Liping Li, Qian Zhai, Edoardo P. Lagioia, Xueling Du, Xinzhong Er, Jianhui Lian, Ziwei Li, Shiyan Zhong, Xiaowei Liu   +30 more
doaj   +1 more source

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
openaire   +2 more sources

Spectropolarimetric Evolution of SN 2023ixf: An Asymmetric Explosion in a Confined Aspherical Circumstellar Medium

The Astrophysical Journal
We present complete spectropolarimetric coverage of the Type II supernova (SN) 2023ixf, ranging from 1 to 120 days after explosion. Polarimetry was obtained with the Kast double spectrograph on the Shane 3 m telescope at Lick Observatory.
Sergiy S. Vasylyev, Luc Dessart, Yi Yang, Alexei V. Filippenko, Kishore C. Patra, Thomas G. Brink, Lifan Wang, Ryan Chornock, Raffaella Margutti, Elinor L. Gates, Adam J. Burgasser, Huei Sears, Preethi R. Karpoor, Natalie LeBaron, Emma Softich, Christopher A. Theissen, Eli Wiston, WeiKang Zheng   +17 more
doaj   +1 more source

Measuring Expansion Velocities in Type II-P Supernovae

, 2011
We estimate photospheric velocities of Type II-P supernovae using model spectra created with SYNOW, and compare the results with those obtained by more conventional techniques, such as cross-correlation, or measuring the absorption minimum of P Cygni ...
Baron, Blondin, Branch, Chugai, Crockett, Dessart, Dessart, Dessart, Dessart, D’Andrea, Eastman, Eldridge, Elmhamdi, Gaskell, Hamuy, Hamuy, Hamuy, Hatano, Immler, J. Vinkó, Jones, K. Takáts, Kasen, Kirshner, Kloehr, Kotak, Leonard, Leonard, Li, Li, Maguire, Maguire, Maund, Maíz-Apellániz, Misra, Nakano, Nakano, Nugent, Pastorello, Pastorello, Poznanski, Poznanski, Quimby, Roy, Sahu, Smartt, Smartt, Smartt, Takáts, Thomas, Tsvetkov, Utrobin, Utrobin, Utrobin, Vinkó, Vinkó, Vinkó, Wang, Zhang, Zwitter   +59 more
core   +1 more source

The evolution of the peculiar Type Ia supernova SN 2005hk over 400 days [PDF]

, 2008
$UBVRI$ photometry and medium resolution optical spectroscopy of peculiar Type Ia supernova SN 2005hk are presented and analysed, covering the pre-maximum phase to around 400 days after explosion.
Anupama, G. C., Kawabata, Koji S., Maeda, Keiichi, Mazzali, Paolo A., Nomoto, Ken'ichi, Prabhu, T. P., Sahu, D. K., Tanaka, Masaomi, Tominaga, Nozomu   +8 more
core   +2 more sources

Self‐Driven Humidity Regulation via Hygroscopic Salt Cycling

Aggregate, Volume 7, Issue 4, April 2026.
A series of antimony‐based inorganic‐organic metal halides with gradient water adsorption capacities is designed. The controlled release of the hygroscopic salt ACl from them during adsorption and re‐capture of ACl during the desorption process is achieved. The chemical bonds' reorganization and energy release enable the self‐driven desorption.
Yi Liu, Hai‐Yan Yin, Yu‐Wei Ren, Dan‐Dan Huang, Hao‐Wei Lin, Yi‐Tong Lin, Hao Wang, Ke‐Zhao Du, Ze‐Ping Wang, Xiao‐Ying Huang   +9 more
wiley   +1 more source

Late-time Optical and X-Ray Emission Evolution of the Oxygen-rich SN 1996cr

The Astrophysical Journal
When the ejecta of a supernova (SN) interact with the progenitor star's circumstellar environment, a strong shock is driven back into the ejecta, causing the material to become bright optically and in X-rays.
Daniel Patnaude, Kathryn E. Weil, Robert A. Fesen, Dan Milisavljevic, Ralph P. Kraft   +4 more
doaj   +1 more source