Results 51 to 60 of about 6,421 (225)

Type Ia supernovae

Journal of Physics: Conference Series, 2007
At its heart, a Type Ia supernova is a problem in turbulent nuclear combustion. There are four sub-problems, each of which has eluded solution for decades, but which can be addressed by large scale simulation. First is the ignition – where and how often the burning is ignited in the convective core of an exploding white dwarf star.
Woosley, S., Almgren, A., Bell, J., Glatzmaier, G., Kasen, D., Kerstein, A., Ma, H., Nugent, P., Röpke, F., Sankaran, V., Zingale, M.   +10 more
openaire   +2 more sources

Models of Type Ia Supernova Explosions [PDF]

, 2003
Type Ia supernovae have become an indispensable tool for studying the expansion history of the universe, yet our understanding of the explosion mechanism is still incomplete. We describe the variety of discussed scenarios, sketch the most relevant physics, and report recent advances in multidimensional simulations of Chandrasekhar mass white dwarf ...
Niemeyer, Jens Carsten, Reinecke, Martin, Hillebrandt, Wolfgang, Wagner, S., Bode, A., Hanke, W., Durst, F.   +6 more
openaire   +4 more sources

Room‐temperature crystal structures of [CH(NH2)2]3Sb2X9 (X = Br and I)

Acta Crystallographica Section C, Volume 82, Issue 3, Page 138-143, March 2026.
Two new vacancy‐ordered formamidinium antimony halide triple‐perovskites, FA3Sb2X9 {FA = [CH(NH2)2]+; X = Br and I}, measured by single‐crystal X‐ray diffraction are described.Crystals of formamidinium antimony, halides, FA3Sb2X9 {FA = [CH(NH2)2]+; X = Br− and I−} {or triformamidinium nonahalidodiantimony, (CH5N2)3[Sb2X9]}, have been synthesized using ...
Prajna Bhatt, Yuhan Liu, Anna Regoutz, Robert G. Palgrave   +3 more
wiley   +1 more source

Optical Spectra of Thermonuclear Supernovae in the Local and Distant Universe [PDF]

, 2005
This thesis is devoted to the study of optical spectra of thermonuclear supernovae, known as ``Type Ia'' supernovae (SN Ia). These violent stellar explosions, visible across a large fraction of the observable universe, are used to measure distances on ...
Blondin, Stephane
core  

SN 2019dks: A 99aa-like Type Ia Supernova with a Low-velocity Gradient

The Astrophysical Journal
We provide an in-depth analysis of optical photometric and spectroscopic observations for the overluminous Type Ia supernova SN 2019dks, distinguished by a low-velocity gradient. This supernova achieves a B -band absolute magnitude of ${M}_{\max }({\rm{B}
Jiajun Cai, Xiangyun Zeng, Wei Zhou, Sai Li, Sheng Zheng, Zhengxue Chang, D. Andrew Howell, K. Azalee Bostroem, Rongjun Zhang, Yangyang Li, Curtis McCully, Craig Pellegrino, Moira Andrews, Joseph R. Farah, Megan Newsome   +14 more
doaj   +1 more source

ON IDENTIFYING THE PROGENITORS OF Type Ia SUPERNOVAE [PDF]

The Astrophysical Journal, 2011
10 pages, 2 figures; ApJL in ...
Livio, Mario, Pringle, J. E.
openaire   +2 more sources

Logarithmic and Strong Coupling Models in Weyl‐Type f(Q,T)$f(Q,T)$ Gravity

Annalen der Physik, Volume 538, Issue 1, January 2026.
This work explores Weyl‐type f(Q,T) gravity using recent observational datasets — CC, Pantheon+, Union 3.0, and DESI DR2. Through MCMC analysis of logarithmic and strong coupling models, the study reveals a transition from deceleration to acceleration, quintessence‐to‐phantom dynamics, and late‐time consistency with LCDM, offering a geometry‐driven ...
Rahul Bhagat, S. K. Tripathy, B. Mishra
wiley   +1 more source

Flight of the Bumblebee: the Early Excess Flux of Type Ia Supernova 2023bee Revealed by TESS, Swift, and Young Supernova Experiment Observations

The Astrophysical Journal
We present high-cadence ultraviolet through near-infrared observations of the Type Ia supernova (SN Ia) 2023bee at D = 32 ± 3 Mpc, finding excess flux in the first days after explosion, particularly in our 10 minutes cadence TESS light curve and Swift UV
Qinan Wang, Armin Rest, Georgios Dimitriadis, Ryan Ridden-Harper, Matthew R. Siebert, Mark Magee, Charlotte R. Angus, Katie Auchettl, Kyle W. Davis, Ryan J. Foley, Ori D. Fox, Sebastian Gomez, Jacob E. Jencson, David O. Jones, Charles D. Kilpatrick, Justin D. R. Pierel, Anthony L. Piro, Abigail Polin, Collin A. Politsch, César Rojas-Bravo, Melissa Shahbandeh, V. Ashley Villar, Yossef Zenati, C. Ashall, Kenneth C. Chambers, David A. Coulter, Thomas de Boer, Nico DiLullo, Christa Gall, Hua Gao, Eric Y. Hsiao, Mark E. Huber, Luca Izzo, Nandita Khetan, Natalie LeBaron, Eugene A. Magnier, Kaisey S. Mandel, Peter McGill, Hao-Yu Miao, Yen-Chen Pan, Catherine P. Stevens, Jonathan J. Swift, Kirsty Taggart, Grace Yang   +43 more
doaj   +1 more source

Bump Morphology of the CMAGIC Diagram

The Astrophysical Journal, 2023
We apply the color–magnitude intercept calibration method (CMAGIC) to the Nearby Supernova Factory SNe Ia spectrophotometric data set. The currently existing CMAGIC parameters are the slope and intercept of a straight line fit to the linear region in the
L. Aldoroty, L. Wang, P. Hoeflich, J. Yang, N. Suntzeff, G. Aldering, P. Antilogus, C. Aragon, S. Bailey, C. Baltay, S. Bongard, K. Boone, C. Buton, Y. Copin, S. Dixon, D. Fouchez, E. Gangler, R. Gupta, B. Hayden, Mitchell Karmen, A. G. Kim, M. Kowalski, D. Küsters, P.-F. Léget, F. Mondon, J. Nordin, R. Pain, E. Pecontal, R. Pereira, S. Perlmutter, K. A. Ponder, D. Rabinowitz, M. Rigault, D. Rubin, K. Runge, C. Saunders, G. Smadja, N. Suzuki, C. Tao, R. C. Thomas, M. Vincenzi   +40 more
doaj   +1 more source

Nachtsicht ins All mit dem bloßen Auge: Sag mir, wie weit die Sterne steh'n

Physik in unserer Zeit, Volume 57, Issue 1, Page 32-40, January 2026.
Beim Blick in den Nachthimmel sehen wir ohne optische Hilfsmittel und abhängig von der lokalen Lichtverschmutzung viele Hundert bis maximal einige Tausend Sterne und auch einige Galaxien. Aber wie weit sind diese von uns entfernt? Und bis zu welchen maximalen Entfernungen können wir Objekte im Weltall mit dem bloßen Auge wahrnehmen?
Michael Vollmer
wiley   +1 more source