Results 41 to 50 of about 200,313 (264)

Revisiting Supernova 1987A constraints on dark photons [PDF]

, 2016
A bstractWe revisit constraints on dark photons with masses below ∼ 100 MeV from the observations of Supernova 1987A. If dark photons are produced in sufficient quantity, they reduce the amount of energy emitted in the form of neutrinos, in conflict with
Jae Hyeok Chang, R. Essig, Samuel D. McDermott   +2 more
semanticscholar   +1 more source

The Type II-P Supernova 2017eaw: From Explosion to the Nebular Phase [PDF]

Astrophysical Journal, 2019
The nearby SN 2017eaw is a Type II-P (“plateau”) supernova (SN) showing early-time, moderate CSM interaction. We present a comprehensive study of this SN, including the analysis of high-quality optical photometry and spectroscopy covering the very early ...
T. Szalai, T. Szalai, J. Vinkó, J. Vinkó, J. Vinkó, R. Könyves-Tóth, A. Nagy, A. Nagy, K. Bostroem, K. S'arneczky, P. Brown, O. Pejcha, A. Bódi, B. Cseh, G. Csörnyei, Z. Dencs, O. Hanyecz, B. Ign'acz, Cs. Kalup, L. Kriskovics, A. Ordasi, A. P'al, B. Seli, Á. Sódor, R. Szakáts, K. Vida, G. Zsidi, Konkoly team, I. Arcavi, C. Ashall, C. Ashall, J. Burke, J. Burke, L. Galbany, D. Hiramatsu, D. Hiramatsu, G. Hosseinzadeh, G. Hosseinzadeh, G. Hosseinzadeh, E. Hsiao, D. Howell, D. Howell, C. McCully, C. McCully, S. Moran, J. Rho, D. Sand, M. Shahbandeh, S. Valenti, Xiaofeng Wang, J. Wheeler, Global Supernova   +51 more
semanticscholar   +1 more source

The Search for Supernova-produced Radionuclides in Terrestrial Deep-sea Archives [PDF]

, 2012
An enhanced concentration of 60Fe was found in a deep ocean's crust in 2004 in a layer corresponding to an age of ~2 Myr. The confirmation of this signal in terrestrial archives as supernova-induced and detection of other supernova-produced radionuclides
A. Wallner, Aggarwal, Allison, Auer, Avillez, Berghöfer, Bourlès, Chmeleff, Cook, D. Breitschwerdt, Diehl, Fitoussi, Fitoussi, Fuchs, G. Korschinek, G. Rugel, Hofmann, Holden, Honda, Imamura, J. Feige, Knie, Knie, Korschinek, Korschinek, L. K. Fifield, Lachner, Merchel, Middleton, Nishiizumi, Paul, Paul, Rugel, S. Merchel, S. R. Winkler, Samworth, Thomas, Wallner   +37 more
core   +1 more source

Improved Cosmological Constraints from New, Old, and Combined Supernova Data Sets [PDF]

, 2008
We present a new compilation of Type Ia supernovae (SNe Ia), a new data set of low-redshift nearby-Hubble-flow SNe, and new analysis procedures to work with these heterogeneous compilations.
M. Kowalski, D. Rubin, D. Rubin, G. Aldering, R. Agostinho, A. Amadon, R. Amanullah, C. Balland, K. Barbary, K. Barbary, G. Blanc, P. Challis, A. Conley, N. Connolly, R. Covarrubias, K. Dawson, S. Deustua, R. Ellis, S. Fabbro, V. Fadeyev, Xiaohui Fan, B. Farris, G. Folatelli, B. Frye, G. Garavini, E. Gates, G. Goldhaber, G. Goldhaber, B. Goldman, A. Goobar, D. Groom, J. Haissinski, D. Hardin, I. Hook, S. Kent, A. Kim, R. Knop, C. Lidman, E. Linder, J. Méndez, J. Meyers, J. Meyers, G. J. Miller, M. Moniez, A. Mourão, H. Newberg, S. Nobili, P. Nugent, R. Pain, O. Perdereau, S. Perlmutter, S. Perlmutter, M. Phillips, V. Prasad, R. Quimby, N. Regnault, J. Rich, E. Rubenstein, P. Ruiz-Lapuente, F. D. Santos, B. Schaefer, R. Schommer, R. C. Smith, A. Soderberg, A. Spadafora, L. Strolger, M. Strovink, M. Strovink, N. Suntzeff, N. Suzuki, R. Thomas, N. Walton, Lianqi Wang, W. Wood-Vasey, J. Yun   +74 more
semanticscholar   +1 more source

A hot and fast ultra-stripped supernova that likely formed a compact neutron star binary [PDF]

Science, 2018
Explosive origin of a binary neutron star Some types of core-collapse supernovae are known to produce a neutron star (NS). A binary NS merger was recently detected from its gravitational wave emission, but it is unclear how such a tight binary system can
K. De, M. Kasliwal, E. Ofek, T. J. Moriya, Jamison Burke, Jamison Burke, Yi Cao, S. B. Cenko, S. B. Cenko, G. Doran, G. Duggan, Rob Fender, C. Fransson, A. Gal-yam, A. Horesh, S. Kulkarni, R. Laher, R. Lunnan, I. Manulis, F. Masci, P. Mazzali, P. Mazzali, P. Nugent, P. Nugent, D. Perley, T. Petrushevska, T. Petrushevska, A. Piro, C. Rumsey, J. Sollerman, Mark Sullivan, F. Taddia   +31 more
semanticscholar   +1 more source

Variable G versus the Accelerated Expansion of the Universe

Open Astronomy, 2017
It is shown that the hypothesis of permitting variability of the Newtonian constant G, increasing with the local density of dark matter, implies that there is no need for the introduction of a cosmological constant or accelerated expansion of the ...
Colenbrander Bernard G., Hulscher Willem S.   +1 more
doaj   +1 more source

Simulations of stripped core-collapse supernovae in close binaries [PDF]

, 2015
We perform smoothed-particle hydrodynamical simulations of the explosion of a helium star in a close binary system, and study the effects of the explosion on the companion star as well as the effect of the presence of the companion on the supernova ...
Rimoldi, Alex, Rossi, Elena Maria, Zwart, Simon Portegies   +2 more
core   +3 more sources

Collisional Triggering of Fast Flavor Conversions of Supernova Neutrinos. [PDF]

Physical Review Letters, 2018
Fast flavor conversions of supernova neutrinos, possible near the neutrinosphere, depends on an interesting interplay of collisions and neutrino oscillations. Contrary to naïve expectations, the rate of self-induced neutrino oscillations, due to neutrino-
F. Capozzi, B. Dasgupta, A. Mirizzi, M. Sen, G. Sigl   +4 more
semanticscholar   +1 more source

Limit on Supernova Emission in the Brightest Gamma-Ray Burst, GRB 221009A

The Astrophysical Journal Letters, 2023
We present photometric and spectroscopic observations of the extraordinary gamma-ray burst (GRB) 221009A in search of an associated supernova. Some past GRBs have shown bumps in the optical light curve that coincide with the emergence of supernova ...
Manisha Shrestha, David J. Sand, Kate D. Alexander, K. Azalee Bostroem, Griffin Hosseinzadeh, Jeniveve Pearson, Mojgan Aghakhanloo, József Vinkó, Jennifer E. Andrews, Jacob E. Jencson, M. J. Lundquist, Samuel Wyatt, D. Andrew Howell, Curtis McCully, Estefania Padilla Gonzalez, Craig Pellegrino, Giacomo Terreran, Daichi Hiramatsu, Megan Newsome, Joseph Farah, Saurabh W. Jha, Nathan Smith, J. Craig Wheeler, Clara Martínez-Vázquez, Julio A. Carballo-Bello, Alex Drlica-Wagner, David J. James, Burçin Mutlu-Pakdil, Guy S. Stringfellow, Joanna D. Sakowska, Noelia E. D. Noël, Clécio R. Bom, Kyler Kuehn   +32 more
doaj   +1 more source

How Tycho Brahe’s recordings in 1572 support SN 1572 as a type I(a) supernova

Frontiers in Astronomy and Space Sciences, 2023
The 450th anniversary of the discovery of the SN 1572 supernova event was celebrated in 2022. A closer look at the historical development of the field of supernova astronomy reveals the scientific importance of Tycho Brahe’s 1572 observations of this ...
Tobias C. Hinse, Tobias C. Hinse, Bertil F. Dorch, Bertil F. Dorch, Lars V. T. Occhionero, Jakob P. Holck   +5 more
doaj   +1 more source