Browsing by Subject "Astrophysics"
Now showing items 1-20 of 144
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7Be(n,alpha) and 7Be(n,p) cross-section measurement for the cosmological lithium problem at the n TOF facility at CERN
(EDP Sciences, 2016)
Conference lecture
Open AccessThe Cosmological Lithium Problem refers to the large discrepancy between the abundance of primordial 7Li predicted by the standard theory of Big Bang Nucleosynthesis and the value inferred from the so-called “Spite plateau” ... -
A GEANT4 Simulation-based study of CIRBE mission
(Universitat Politècnica de Catalunya, 2019-07-10)
Bachelor thesis
Restricted access - author's decision -
A model-based systems engineering approach to space mission education of a geographically disperse student workforce
(Universitat Politècnica de Catalunya, 2022-04-29)
Conference lecture
Open AccessThe Alabama Burst Energetics eXplorer (ABEX) is a 12U CubeSat commissioned by the Alabama Space Grant Consortium; its astrophysics mission is to study the low energy, prompt emission of Gamma-ray Bursts in both gamma and ... -
A polarized fast radio burst at low Galactic latitude
(2017-08-01)
Article
Open AccessWe report on the discovery of a new fast radio burst (FRB), FRB 150215, with the Parkes radio telescope on 2015 February 15. The burst was detected in real time with a dispersion measure (DM) of 1105.6 ± 0.8 pc cm-3, a ... -
A remarkable recurrent nova in M 31: The predicted 2014 outburst in X-rays with Swift
(2015-08-01)
Article
Open AccessContext. The M 31 nova M31N 2008-12a was recently found to be a recurrent nova (RN) with a recurrence time of about one year. This is by far the fastest recurrence time scale of any known RN.; Aims. Our optical monitoring ... -
A Trojan horse approach to the production of 18F in Novae
(2017-09-01)
Article
Open AccessCrucial information on nova nucleosynthesis can be potentially inferred from ¿-ray signals powered by 18F decay. Therefore, the reaction network producing and destroying this radioactive isotope has been extensively studied ... -
Advances and new ideas for neutron-capture astrophysics experiments at CERN n_TOF
(Springer Nature, 2023-01-01)
Article
Open AccessThis article presents a few selected developments and future ideas related to the measurement of (n,¿) data of astrophysical interest at CERN n_TOF. The MC-aided analysis methodology for the use of low-efficiency radiation ... -
All-flavor search for a diffuse flux of cosmic neutrinos with nine years of ANTARES data
(2018-01-20)
Article
Open AccessThe ANTARES detector is at present the most sensitive neutrino telescope in the northern hemisphere. The highly significant cosmic neutrino excess observed by the Antarctic IceCube detector can be studied with ANTARES, ... -
All-sky search for high-energy neutrinos from gravitational wave event GW170104 with the Antares neutrino telescope: The ANTARES Collaboration
(2017-12-28)
Article
Open Access© 2017, The Author(s). Advanced LIGO detected a significant gravitational wave signal (GW170104) originating from the coalescence of two black holes during the second observation run on January 4th, 2017. An all-sky ... -
Analysis of Interplanetary Coronal Mass Ejections Observed by STEREO and MESSENGER
(Universitat Politècnica de Catalunya, 2019-05-27)
Bachelor thesis
Open Access
Covenantee: Goddard Space Flight CenterCoronal mass ejections (CMEs) expelled from the solar corona are a major space weather driver, both in space and on the ground. The fast-traveling CME plasma, which carries a twisted magnetic field, is a common source of ... -
Analysis of Medium-Earth Orbit Radiation Effects in Digital Systems for Spacecraft
(Universitat Politècnica de Catalunya, 2022-05-25)
Bachelor thesis
Restricted access - confidentiality agreement
Covenantee: Université Grenoble AlpesField-programmable gate array (FPGA) are very appealing for space-based applications thanks to their great flexibility, allowing reconfiguration during spaceflight. However, they are sensitive to space radiation, especially ... -
ANTARES constrains a blazar origin of two IceCube PeV neutrino events
(2015-04-01)
Article
Open AccessContext. The source(s) of the neutrino excess reported by the IceCube Collaboration is unknown. The TANAMI Collaboration recently reported on the multiwavelength emission of six bright, variable blazars which are positionally ... -
ANTARES search for point sources of neutrinos using astrophysical catalogs: a likelihood analysis
(Institute of Physics (IOP), 2021-04-10)
Article
Open AccessA search for astrophysical pointlike neutrino sources using the data collected by the ANTARES detector between 2007 January 29 and 2017 December 31 is presented. A likelihood method is used to assess the significance of ... -
ANTARES upper limits on the multi-TeV neutrino emission from the GRBs detected by IACTs
(2021-03-01)
Article
Open AccessThe first gamma-ray burst detections by Imaging Atmospheric Cherenkov Telescopes have been recently announced: GRB 190114C, detected by MAGIC, GRB 180720B and GRB 190829A, observed by H.E.S.S. A dedicated search for neutrinos ... -
Approaching the exascale simulation of subsonic turbulence with smoothed particle hydrodynamics
(Universitat Politècnica de Catalunya, 2022-09-09)
Master thesis
Open AccessTurbulence is key to many astrophysical and cosmological scenarios. Hence, a correct depiction of it in numerical simulations is of capital importance. Kolmogorov's theory states that in the subsonic regime the energy ... -
Architecture and performance of the KM3NeT front-end firmware
(International Society for Photo-Optical Instrumentation Engineers (SPIE), 2021-01-01)
Article
Open AccessThe KM3NeT infrastructure consists of two deep-sea neutrino telescopes being deployed in the Mediterranean Sea. The telescopes will detect extraterrestrial and atmospheric neutrinos by means of the incident photons induced ... -
Astrophysical parameter determination using chaotic orbital regions
(Universitat Politècnica de Catalunya, 2018-02-27)
Master thesis
Open Access
Covenantee: European Space Research and Technology CentreThe goal of this thesis is to show that chaotic orbits of a dynamical system are advantageous (compared with regularnes) to determine the characteristic parameters of the system, and to give an estimate about the behaviour ... -
Astrophysics at n-TOF facility at CERN
(Institute of Physics (IOP), 2010)
Conference report
Open AccessThe neutron time of flight (n_TOF) facility at CERN is a spallation neutron source with white neutron energy spectrum (from thermal to several GeV), covering the full energy range of interest for nuclear astrophysics, in ... -
Axions and the luminosity function of white dwarfs : the thin and thick discs, and the halo
(Oxford University Press, 2018-08-01)
Article
Open AccessThe evolution of white dwarfs is a simple gravothermal process of cooling. Since the shape of their luminosity function is sensitive to the characteristic cooling time, it is possible to use its slope to test the existence ... -
Beta-decay half-lives and beta-delayed neutron emission probabilities for several isotopes of Au, Hg, Tl, Pb, and Bi, beyond N = 126
(2017-06-23)
Article
Open AccessBackground: There have been measurements on roughly 230 nuclei that are beta-delayed neutron emitters. They range from 8He up to 150La. Apart from 210Tl, with a branching ratio of only 0.007%, no other neutron emitter has ...