Results 21 to 30 of about 33,263 (234)

The accelerating universe under Poincaré gauge theory of gravtiy

open access: yes上海师范大学学报. 自然科学版, 2014
The accelerating expansion was discovered at the end of the last century, which violates humans′ fundamental intuition of gravity. Trying to explaining this weird observational fact became the principal task of cosmologists, who proposed various models ...
AO Xichen
doaj   +1 more source

Supernovae and Supernova, Remnants

open access: yesThe Astronomical Journal, 1968
Supernovae remnants evolution, properties and galactic distribution, discussing criteria for catalog listing and remnants as X ray ...
A. Poveda, L. Woltjer
openaire   +1 more source

Supernova Remnants and their Supernovae [PDF]

open access: yesInternational 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

Ghost particles in the universe: Neutrinos in astrophysics and cosmology

open access: yesMètode Science Studies Journal: Annual Review, 2017
  Neutrinos are nearly massless and very difficult to detect because they interact so very weakly. Sixty years after seeing the first of these «ghost particles» we know a lot about their properties.
Georg Gottfried Raffelt
doaj   +1 more source

The ANU WiFeS SuperNovA Programme (AWSNAP) [PDF]

open access: yes, 2016
This paper presents the first major data release and survey description for the ANUWiFeS SuperNovA Programme. ANU WiFeS SuperNovA Programme is an ongoing supernova spectroscopy campaign utilising the Wide Field Spectrograph on the Australian National ...
Aniyan, Suryashree   +26 more
core   +1 more source

Evoluzione temporale di una supernova di tipo II nella fase di Plateau [PDF]

open access: yes, 2022
Studio dell'evoluzione spettroscopica della supernova SN 2013ds esplosa nella galassia PGC 57429 e classificata come supernova di tipo IIP. Riduzione dei dati opportunamente eseguita con IRAF. Vengono identificate specifiche righe spettrali per la stima
Milan, Michela
core  

Supernovae and cosmology [PDF]

open access: yesNew 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

Light element production in the big bang and the synthesis of heavy elements in 3D MHD jets from core-collapse supernovae [PDF]

open access: yes, 2013
In this dissertation we present the main features of a new nuclear reaction network evolution code. This new code allows nucleosynthesis calculations for large numbers of nuclides.
Winteler, Christian
core   +1 more source

The high energy X-ray probe (HEX-P): science overview

open access: yesFrontiers in Astronomy and Space Sciences
To answer NASA’s call for a sensitive X-ray observatory in the 2030s, we present the High Energy X-ray Probe (HEX-P) mission concept. HEX-P is designed to provide the required capabilities to explore current scientific questions and make new discoveries ...
Javier A. García   +74 more
doaj   +1 more source

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