Results 101 to 110 of about 48,593 (219)

Near-infrared line identification in type Ia supernovae during the transitional phase

, 2014
We present near-infrared synthetic spectra of a delayed-detonation hydrodynamical model and compare them to observed spectra of four normal type Ia supernovae ranging from day +56.5 to day +85. This is the epoch during which supernovae are believed to be
Baron, E., Friesen, Brian, Marion, G. H., Miller, Timothy R., Parrent, Jerod T., Thomas, R. C., Wisniewski, John P.   +6 more
core   +1 more source

On relative supernova rates and nucleosynthesis roles [PDF]

It is shown that the Ni-56-Fe-56 observed in SN 1987A argues that core collapse supernovae may be responsible for more that 50 percent of the iron in the galaxy.
Arnett, W. David, Schramm, David N., Truran, James W.   +2 more
core   +1 more source

On the nature of rapidly fading Type II supernovae

, 2015
It has been suggested that Type II supernovae with rapidly fading light curves (a.k.a. Type IIL supernovae) are explosions of progenitors with low-mass hydrogen-rich envelopes which are of the order of 1 Msun.
Blinnikov, Sergei I., Ergon, Mattias, Moriya, Takashi J., Pruzhinskaya, Maria V.   +3 more
core   +1 more source

Models of Type II Supernova Explosions [PDF]

Highlights of Astronomy, 1986
Present stellar evolution codes predict that stars with He-core masses above approximately 2 M⊙, corresponding to main sequence masses of at least 8 M⊙ burn carbon non-violently. After hydrostatic core carbon burning all those stars contain O-Ne-Mg cores but their further evolution is strongly dependent on the stellar entropy and thus on the main ...
openaire   +1 more source

Final Moments. III. Explosion Properties and Progenitor Constraints of CSM-interacting Type II Supernovae

The Astrophysical Journal
We present analysis of the plateau and late-time phase properties of a sample of 39 Type II supernovae (SNe II) that show narrow, transient, high-ionization emission lines (i.e., “IIn-like”) in their early-time spectra from interaction with confined ...
W. V. Jacobson-Galán, L. Dessart, K. W. Davis, K. A. Bostroem, C. D. Kilpatrick, R. Margutti, A. V. Filippenko, R. J. Foley, R. Chornock, G. Terreran, D. Hiramatsu, M. Newsome, E. Padilla Gonzalez, C. Pellegrino, D. A. Howell, J. P. Anderson, C. R. Angus, K. Auchettl, T. G. Brink, R. Cartier, D. A. Coulter, T. de Boer, M. R. Drout, N. Earl, K. Ertini, J. R. Farah, D. Farias, C. Gall, H. Gao, M. A. Gerlach, F. Guo, A. Haynie, G. Hosseinzadeh, A. L. Ibik, S. W. Jha, D. O. Jones, D. Langeroodi, N. LeBaron, E. A. Magnier, A. L. Piro, S. I. Raimundo, A. Rest, S. Rest, R. Michael Rich, C. Rojas-Bravo, H. Sears, K. Taggart, V. A. Villar, R. J. Wainscoat, X.-F. Wang, A. R. Wasserman, S. Yan, Y. Yang, J. Zhang, W. Zheng   +54 more
doaj   +1 more source

Core-collapse supernovae ages and metallicities from emission-line diagnostics of nearby stellar populations

, 2018
Massive stars are the main objects that illuminate H II regions and they evolve quickly to end their lives in core-collapse supernovae (CCSNe). Thus it is important to investigate the association between CCSNe and H II regions.
Eldridge, J. J., Galbany, L., Stanway, Elizabeth R., Xiao, Lin   +3 more
core   +1 more source

SN 2022jox: An Extraordinarily Ordinary Type II SN with Flash Spectroscopy

The Astrophysical Journal
We present high-cadence optical and ultraviolet (UV) observations of the Type II supernova (SN), SN 2022jox which exhibits early spectroscopic high-ionization flash features of H i , He ii , C iv , and N iv that disappear within the first few days after ...
Jennifer E. Andrews, Jeniveve Pearson, Griffin Hosseinzadeh, K. Azalee Bostroem, Yize Dong, Manisha Shrestha, Jacob E. Jencson, David J. Sand, S. Valenti, Emily Hoang, Daryl Janzen, M. J. Lundquist, Nicolás Meza, Samuel Wyatt, Saurabh W. Jha, Chris Simpson, Joseph Farah, Estefania Padilla Gonzalez, D. Andrew Howell, Curtis McCully, Megan Newsome, Craig Pellegrino, Giacomo Terreran   +22 more
doaj   +1 more source

Type II Supernovae as Probes of Cosmology

, 2009
- Constraining the cosmological parameters and understanding Dark Energy have tremendous implications for the nature of the Universe and its physical laws.
Baron, Eddie, Blondin, Stephane, Bloom, Joshua S., D'Andrea, Christopher B., Della Valle, Massimo, Dessart, Luc, Ellis, Richard S., Gal-Yam, Avishay, Goobar, Ariel, Hamuy, Mario, Hicken, Malcolm, Kasen, Daniel N., Krisciunas, Kevin L., Leonard, Douglas C., Li, Weidong, Livio, Mario, Marion, Howie, Matheson, Thomas, Neill, James D., Nomoto, Ken'ichi, Nugent, Peter E., Poznanski, Dovi, Quimby, Robert, Sako, Masao, Sullivan, Mark, Thomas, Rollin C., Turatto, Massimo, Van Dyk, Schuyler D., Wood-Vasey, W. Michael   +28 more
core  

X-ray emission from radiative shocks in Type II supernovae

, 2005
The X-ray emission from the circumstellar interaction in Type II supernovae with a dense circumstellar medium is calculated. In Type IIL and Type IIn supernovae mass loss rates are generally high enough for the region behind the reverse shock to be ...
Aldrovandi, Arnaud, Arnaud, Borkowski, Borkowski, C. Fransson, C. Kozma, Canizares, Chandra, Chevalier, Chevalier, Chevalier, Chevalier, Chevalier, Chevalier, Chevalier, Chevalier, Chugai, Cox, Dasgupta, Dere, Dopita, Dopita, Dopita, Drake, Fesen, Filippenko, Fox, Fransson, Fransson, Fransson, Fransson, Fryxell, Goldman, Gu, Heger, Houck, Innes, Itoh, Itoh, Itoh, Itoh, Iwamoto, Kaaret, Kaastra, Kifonidis, Kohmura, Landini, Landini, Leising, Lundqvist, Matzner, Mazzotta, Mewe, Meynet, Michael, Nadyozhin, Nahar, Nahar, Nahar, Nomoto, Nomoto, Panagia, Pequignot, Pietsch, Plewa, Plewa, Pooley, Ray, Raymond, Ryder, Salasnich, Schlegel, Schlegel, Shigeyama, Shigeyama, Shull, Sorokina, Sutherland, Sutherland, Sutherland, Suzuki, Swartz, T. K. Nymark, Tarter, Uno, Verner, Woosley, Young, Zatsarinny, Zatsarinny, Zatsarinny, Zimmerman   +92 more
core   +1 more source

Type II supernovae at high redshifts

, 1999
A hydro code coupled with radiation transfer was applied to produce monochromatic light curves of two models of type II supernovae (SN II) simulating SN II-P and SN IIb (SN 1993J-like). We then used these template light curves to evaluate the possibility of detecting SNe II at different redshifts.
Chugai, Nikolai, Blinnikov, Sergei, Lundqvist, Peter   +2 more
openaire   +2 more sources