Results 21 to 30 of about 21,733 (235)

A statistical analysis of circumstellar material in Type Ia supernovae [PDF]

, 2013
A key tracer of the elusive progenitor systems of Type Ia supernovae (SNe Ia) is the detection of narrow blueshifted time-varying Na I D absorption lines, interpreted as evidence of circumstellar material surrounding the progenitor system.
Hadjiyska, E., Smartt, SJ, Leloudas, Georgios,, Dhawan, S, Laher, R. R., Sand, D., Bersier, D, Ellman, N., Patat, F., Valenti, S, Chen, TW, Fraser, M, Nugent, P. E., Nugent, P., Margheim, S., Foerster, F., Walton, N., Hadjiyska, E, Smartt, S., Förster, F., Pan, Y.- C., Laher, R., Simon, J. D., González Gaitán, Santiago, Nugent, PE, Sternberg, A, Walton, NA, González-Gaitán, S, Chen, T.-W., Pan, Yunxiang, Molinaro, M, Ofek, E. O., Mazzali, P, Smartt, S. J.; id_orcid, Rabinowitz, D, Sand, D, Chen, T., Gal-Yam, A, Hachinger, S., Smareglia, R, Rabinowitz, D., Knapic, C, Margheim, S, Graham, M., Mazzali, PA, Blagorodnova, N, Podsiadlowski, P, Foerster, F, Feindt, U, Taddia, Francesco,, Podsiadlowski, P., Gal-Yam, A., Walker, E. S., Chen, T.- W., Chen, T. -W., Simon, J., Pan, Y. -C, Rest, A, Howell, D. A., Graham, ML, Walker, E., Patat, F, Sullivan, M., Pan, Y. C., Hachinger, S, Young, D. R.; id_orcid, Mazzali, P., Chen, T-W, Valenti, S., Maguire, K., Simon, JD, Morrell, N, Hook, Isobel, Ellman, N, Podsiadlowski, Philipp, Leloudas, G, McKinnon, R, Walker, ES, Smareglia, R., Baltay, C., González-Gaitán, S., Graham, M. L., Smartt, S. J., Pan, Y-C, Hook, I., Feindt, U., Molinaro, M., Walton, N. A., Förster, Francisco, Howell, DA, Fraser, M., Förster, F, Taddia, F, Taddia, F., Baltay, C, Laher, RR, Young, D., Chen, T. W., Ofek, E., Hook, IM, McKinnon, R., Sullivan, M, Sternberg, A., Young, D. R., Pan, Y.-C., Pan, Y. -C., Hook, I. M., Rest, A., Gutiérrez, C, Pan, YC, Young, DR, Bersier, D., Maguire, K, Knapic, C., Ofek, EO, Blagorodnova, N., Inserra, C, Howell, D., Gutiérrez, C., Dhawan, S., Chen, T. -W, Inserra, C., Pan, Y., Leloudas, G., Morrell, N.   +124 more
core   +1 more source

Neutrino Flavor Conversions in High-Density Astrophysical and Cosmological Environments

Universe, 2022
Despite being a well understood phenomenon in the context of current terrestrial experiments, neutrino flavor conversions in dense astrophysical environments probably represent one of the most challenging open problems in neutrino physics.
Francesco Capozzi, Ninetta Saviano
doaj   +1 more source

Supernova Remnants and their Supernovae [PDF]

International Astronomical Union Colloquium, 1988
AbstractObserving supernova remnants provides important clues to the nature of supernova explosions. Conversely, the late stages of stellar evolution and the mechanism of supernova explosions affect supernova remnants through circumstellar matter, stellar remnants, and nucleosynthesis. The elements of supernova classification and the connection between
openaire   +1 more source

Misure di Distanza in Cosmologia e Supernovae di Tipo Ia [PDF]

, 2022
The observation that Type Ia Supernovae are fainter than expected given their redshift has led to the conclusion that the expansion of the universe is accelerating.
De Leone, Matteo
core  

The Use of Multiwavelength Archival Observational Data for Scientific Discoveries: a Case of the Supernova Remnant Cassiopeia A

Open Astronomy, 2012
Most of the high-quality astronomical data after a proprietary period of typically one year are provided to open access, allowing researchers to complement their observations with the archival data in other wavelength bands, thus improving quality of the
Docenko Dmitrijs
doaj   +1 more source

Induced Gravitational Collapse, Binary-Driven Hypernovae, Long Gramma-ray Bursts and Their Connection with Short Gamma-ray Bursts

Universe, 2019
There is increasing observational evidence that short and long Gamma-ray bursts (GRBs) originate in different subclasses, each one with specific energy release, spectra, duration, etc, and all of them with binary progenitors.
J. A. Rueda, R. Ruffini, Y. Wang
doaj   +1 more source

Supernovae and cosmology [PDF]

New Astronomy Reviews, 2001
These lecture notes intend to form a short pedagogical introduction to the use of typical type Ia-Supernovae (hereafter SNIa) as standard candles to determine the energy density of the universe. Problems of principle for taking SNIa as cosmological probes are pointed out, and new attempts at solving them are indicated including the empirical width ...
Signore, M., Puy, D.
openaire   +2 more sources

The Faint- Supernovae: a low-energy explosion [PDF]

, 2023
openRecentemente è stato scoperto e studiato un certo numero di supernovae inizialmente classificate come di Tipo II. Tale gruppo presenta delle peculiarità; Infatti se da una parte esse manifestano caratteristiche spettrali di tale classe di SN, dall ...
BENEDET, MADDALENA
core  

Weighing Cosmological Models with SNe Ia and Gamma Ray Burst Redshift Data

Universe, 2019
Many models have been proposed to explain the intergalactic redshift using different observational data and different criteria for the goodness-of-fit of a model to the data. The purpose of this paper is to examine several suggested models using the same
Rajendra P. Gupta
doaj   +1 more source

Neutrino treatment in multidimensional astrophysical simulations : a new spectral scheme [PDF]

, 2014
Neutrinos play a central role in modern physics and astrophysics. Their extremely weak interaction rate with baryons and other leptons makes their detection on the Earth difficult and challenging.
Perego, Albino
core   +1 more source