Results 101 to 110 of about 8,434 (211)

Supernovae 1983i and 1983v - Evidence for abundance variations in type Ib supernovae

The Astrophysical Journal, 1987
Spectra are presented of SN 1983i 5 days after discovery and of SN 1983v 13 days after discovery. The similarity of these two spectra argues that they are of similar origin and phase. Theoretical atmosphere calculations provide evidence for a connection to the type Ib supernovae 1983n and 1984l, with SN 1983i and 1983v having a similar structure but ...
J. C. Wheeler, R. P. Harkness, E. S. Barker, A. L. Cochran, D. Wills   +4 more
openaire   +1 more source

Nonthermal excitation of helium in type Ib supernovae

The Astrophysical Journal, 1991
The presence of strong He I absorption troughs in the optical spectra of type Ib SNs is attributed to non-thermal excitation. As for analogous in the premaximum spectra of SN 1987A, the early importance of nonthermal excitation in the Ib's is fundamentally due to a large-scale instability that mixes 56 Ni out into their envelopes shortly after the ...
openaire   +1 more source

SN 2023zaw: The Low-energy Explosion of an Ultrastripped Star

The Astrophysical Journal Letters
Most stripped-envelope supernova progenitors are thought to be formed through binary interaction, losing hydrogen and/or helium from their outer layers. Ultrastripped supernovae are an emerging class of transient that are expected to be produced through ...
T. Moore, J. H. Gillanders, M. Nicholl, M. E. Huber, S. J. Smartt, S. Srivastav, H. F. Stevance, T.-W. Chen, K. C. Chambers, J. P. Anderson, M. D. Fulton, S. R. Oates, C. Angus, G. Pignata, N. Erasmus, H. Gao, J. Herman, C.-C. Lin, T. Lowe, E. A. Magnier, P. Minguez, C.-C. Ngeow, X. Sheng, S. A. Sim, K. W. Smith, R. Wainscoat, S. Yang, D. R. Young, K.-J. Zeng   +28 more
doaj   +1 more source

The hydrogen-free circumstellar interaction in the Type Ib supernova 2021efd: A clue to the mechanism of the helium-layer stripping

Astronomy & Astrophysics
Context. Stripped-envelope supernovae (SESNe), including Type IIb, Ib, and Ic supernovae (SNe), originate from the explosions of massive stars whose outer envelopes have been largely removed during their lifetimes.
Pyykkinen N., Nagao T., Kuncarayakti H., Stritzinger M. D., Kangas T., Maeda K., Chen P., Sollerman J., Burns C., Bose S., Folatelli G., Ferrari L., Morrell N., Reguitti A., Salmaso I., Mattila S., Gal-Yam A., Fremling C., Anand S., Kasliwal M. M., Gutiérrez C. P., Galbany L., Hoogendam W., Schulze S., Ashall C., Medler K., Pfeffer C. M., Lundqvist P., Rusholme B., Adler J.   +29 more
doaj   +1 more source

TeV neutrinos from core collapse supernovae and hypernovae

, 2005
A fraction of core collapse supernovae of type Ib/c are associated with Gamma-ray bursts, which are thought to produce highly relativistic jets. Recently, it has been hypothesized that a larger fraction of core collapse supernovae produce slower jets ...
A. Alonso-Herrero, E. Waxman, Eli Waxman, L. Hernquist, Peter Mészáros, Soebur Razzaque   +5 more
core   +1 more source

The origin of single radio pulsars

, 1999
By comparing relative rates of supernovae versus formation rates of single radio pulsars, recycled pulsars, binary pulsars and X-ray binaries we put strong limits on the progenitors of radio pulsars and on the requirement of an asymmetry in the supernova.
Heuvel, Edward van den, Zwart, Simon Portegies   +1 more
core   +2 more sources

Radiative Transfer Modeling of Stripped-envelope Supernovae. I. A Grid for Ejecta Parameter Inference

The Astrophysical Journal
We present 1800 multiwavelength Type Ib/c supernovae light-curve models obtained by running the radiation transport code Sedona and varying the mass distribution, velocity profile, and abundance ejecta profiles of helium star progenitors.
S. Karthik Yadavalli, V. Ashley Villar, Abigail Polin, S. E. Woosley, Maria R. Drout, Miranda Pikus   +5 more
doaj   +1 more source

Constraints on the Massive Supernova Progenitors

, 2007
Generally accepted scheme distinguishes two main classes of supernovae (SNe): Ia resulting from the old stellar population (deflagration of a white dwarf in close binary systems), and SNe of type II and Ib/c whose ancestors are young massive stars (died ...
Barbon R., BOJAN ARBUTINA, Cappellaro E., Cappellaro E., de Vaucouleurs G., Tully R. B.   +5 more
core   +1 more source

Analysis of Late--time Light Curves of Type IIb, Ib and Ic Supernovae

, 2015
The shape of the light curve peak of radioactive--powered core--collapse "stripped--envelope" supernovae constrains the ejecta mass, nickel mass, and kinetic energy by the brightness and diffusion time for a given opacity and observed expansion velocity.
Clocchiatti, A., Johnson, V., Wheeler, J. Craig   +2 more
core   +1 more source

Late Jets, Early Sparks: Illuminating the Premaximum Bumps in Superluminous Supernovae

The Astrophysical Journal Letters
Superluminous supernovae (SLSNe) radiate ≳10–100 times more energy than ordinary stellar explosions, implicating a novel power source behind these enigmatic events.
Ore Gottlieb, Brian D. Metzger
doaj   +1 more source