Results 51 to 60 of about 31,180 (215)

New Arabic Records From Cairo on Supernovae 1181 and 1006

Astronomische Nachrichten, Volume 346, Issue 9, November 2025.
ABSTRACT The remnant of the historical supernova SN 1181 is under discussion: While the previously suggested G130.7+3.1 (3C58) appears too old (3000–5000 year), the unusual star IRAS00500+6713 with a surrounding nebula (Pa‐30) has an expansion age not inconsistent with a SN Iax explosion in ad 1181 under the assumption that neither acceleration nor ...
J. G. Fischer, H. Halm, R. Neuhäuser, D. L. Neuhäuser   +3 more
wiley   +1 more source

Using Nebular Near-infrared Spectroscopy to Measure Asymmetric Chemical Distributions in 2003fg-like Thermonuclear Supernovae

The Astrophysical Journal
We present an analysis of three near-infrared (NIR; 1.0–2.4 μ m) spectra of the SN 2003fg–like/“super-Chandrasekhar” Type Ia supernovae (SNe Ia) SN 2009dc, SN 2020hvf, and SN 2022pul at respective phases of +372, +296, and +294 days relative to the epoch
J. O’Hora, C. Ashall, M. Shahbandeh, E. Hsiao, P. Hoeflich, M. D. Stritzinger, L. Galbany, E. Baron, J. DerKacy, S. Kumar, J. Lu, K. Medler, B. Shappee   +12 more
doaj   +1 more source

The Effects of Thomson Scattering and Chemical Mixing on Early-time Light Curves of Double-peaked Type IIb Supernovae

The Astrophysical Journal, 2023
Previous numerical simulations of double-peaked Type IIb supernova (SN IIb) light curves have demonstrated that the radius and mass of the hydrogen-rich envelope of the progenitor star can significantly influence the brightness and timescale of the early-
Seong Hyun Park, Sung-Chul Yoon, Sergei Blinnikov   +2 more
doaj   +1 more source

First Detection of [SI] in Near‐IR JWST Observations of Io in Eclipse, and Comparison With SO Emissions, Evolving Volcanic Eruptions, and Prior UV HST‐STIS [SI] Emissions

Journal of Geophysical Research: Planets, Volume 130, Issue 11, November 2025.
Abstract We observed Io with the James Webb Space Telescope (JWST) NIRSpec/Integral Field Unit (1.0–5.3 μm, R∼2700 $R\sim 2700$) in August 2023 while the satellite was in eclipse. Thermal emission from Kanehekili Fluctus is consistent with the cooling of lava flows after a vigorous eruption in November 2022.
Imke de Pater, Darrell F. Strobel, Ashley Gerard Davies, Joachim Saur, Lorenz Roth, Katherine de Kleer, Emmanuel Lellouch, Zachariah Milby, Carl Schmidt, Thierry Fouchet, Michael H. Wong, Leigh N. Fletcher, Jake Harkett, Michael Roman, Richard J. Cartwright, Jason E. Perry, Julie Renaud‐Kim, Carolyn Jordan, Stephan Schlegel, David A. Williams, David M. Nelson   +20 more
wiley   +1 more source

The Progenitor of the S147 Supernova Remnant

The Astrophysical Journal
The supernova remnant (SNR) S147 contains the pulsar PSR J0538+2817 and a likely unbound binary companion, HD 37424. It is the only good Galactic candidate for a binary unbound by a core-collapse supernova.
Elvira Cruz-Cruz, Christopher S. Kochanek   +1 more
doaj   +1 more source

The Type Ibn Supernova 2019kbj: Indications for Diversity in Type Ibn Supernova Progenitors

The Astrophysical Journal, 2023
Type Ibn supernovae (SNe) are a rare class of stellar explosions whose progenitor systems are not yet well determined. We present and analyze observations of the Type Ibn SN 2019kbj, and model its light curve in order to constrain its progenitor and ...
Tom Ben-Ami, Iair Arcavi, Megan Newsome, Joseph Farah, Craig Pellegrino, Giacomo Terreran, Jamison Burke, Griffin Hosseinzadeh, Curtis McCully, Daichi Hiramatsu, Estefania Padilla Gonzalez, D. Andrew Howell   +11 more
doaj   +1 more source

Jet-Induced Explosions of Core Collapse Supernovae [PDF]

, 1999
We numerically studied the explosion of a supernova caused by supersonic jets present in its center. The jets are assumed to be generated by a magneto-rotational mechanism when a stellar core collapses into a neutron star. We simulated the process of the
A. M. Khokhlov, A. Yu. Chtchelkanova, Bisnovatyi-Kogan G. S., E. S. Oran, J. C. Wheeler, Janka H.-T., L. Wang, P. A. Höflich   +7 more
core   +3 more sources

Hydrogen-poor Superluminous Supernovae in the Nebular Phase: Spectral Diversity Due to Ejecta Ionization as a Probe of the Power Source

The Astrophysical Journal
We present a large sample of 39 nebular-phase optical spectra of 25 hydrogen-poor superluminous supernovae (SLSNe-I) and jointly analyze them with previously published spectra of 12 events.
Peter K. Blanchard, Edo Berger, Sebastian Gomez, Matt Nicholl, Ryan Chornock, Harsh Kumar, Raffaella Margutti, Daichi Hiramatsu, Huei Sears   +8 more
doaj   +1 more source

Near-infrared Spectroscopy of Dense Ejecta Knots in the Outer Eastern Area of the Cassiopeia A Supernova Remnant

The Astrophysical Journal, 2023
The Cassiopeia A supernova remnant has a complex structure, manifesting the multidimensional nature of core-collapse supernova explosions. To further understand this, we carried out near-infrared multiobject spectroscopy on the ejecta knots located in ...
Bon-Chul Koo, Yong-Hyun Lee, Jae-Joon Lee, Sung-Chul Yoon   +3 more
doaj   +1 more source

On the Progenitors of Core-Collapse Supernovae

, 2010
Theory holds that a star born with an initial mass between about 8 and 140 times the mass of the Sun will end its life through the catastrophic gravitational collapse of its iron core to a neutron star or black hole. This core collapse process is thought
A. Gal-Yam, A. Gal-Yam, A. Gal-Yam, A. Heger, A. Heger, A. Maeder, A. Pastorello, A.V. Filippenko, A.V. Filippenko, C.S. Kochanek, D.C. Leonard, D.C. Leonard, D.C. Leonard, D.F. Figer, Douglas C. Leonard, E.M. Levesque, F.S. Kitaura, G. Meynet, G. Rakavy, H.Y. Xu, J.C. Wheeler, J.J. Eldridge, J.J. Eldridge, J.R. Maund, J.R. Maund, J.W. Murphy, K.I. Nomoto, L. Dessart, L.A. Thompson, M. Fraser, N. Elias-Rosa, N. Elias-Rosa, N. Smith, N. Smith, R.A. Chevalier, R.M. Crockett, S. Mattila, S.A. Colgate, S.D. Dyk van, S.E. Woosley, S.J. Smartt, T. Moriya, T. Morris   +42 more
core   +1 more source