| Titre : |
Correlations of GRB Physical Properties : Review and Exploration |
| Type de document : |
texte imprimé |
| Auteurs : |
Mohamed Islam Khadir, Auteur ; Nidhal Guessoum, Directeur de thèse |
| Editeur : |
CONSTANTINE [ALGERIE] : Université Frères Mentouri Constantine |
| Année de publication : |
2021 |
| Importance : |
59 f. |
| Format : |
30 cm. |
| Note générale : |
Une copie electronique PDF disponible au BUC |
| Langues : |
Anglais (eng) |
| Catégories : |
Sciences Exactes:Physique
|
| Tags : |
Review and Exploration |
| Index. décimale : |
530 Physique |
| Résumé : |
The study of our universe requires different observational data to test the cosmological models and to understand the structure and the evolution of the cosmos. Among
all the known astrophysical sources, a key role is played by the so-called standard
candles: namely astrophysical objects or phenomena that possess a fixed luminosity
or whose luminosity is characterized by an intrinsic correlation with the other physical parameters. So far, scientists have succeeded in standardizing some interesting
objects, such as Supernovae Type Ia (SNe Ia) and Cepheids. The presence of the
standard candles is crucial since these allow to estimate their distances and, thus,
to obtain hints on the shape of the universe. Many more candidates are expected
to be standardized in the next future, such as the Gamma-ray Bursts (GRBs) and
the quasars, since these will be able to extend the Hubble diagram and the cosmological test to a further range of redshifts. Among the promising candidate to be
standardized a particular interest is aroused by the Gamma-ray Bursts associated
with Supernovae, namely the GRB-SNe. The GRB-SNe are observed up to redshift
z ∼ 1 and are characterized by a SN explosion that emerges in the late afterglow of
the GRB. As pointed out by scientists like Cano (2014), these particular phenomena
have the potential to be considered as standard candles. Since the standardization of
the GRB-SNe needs in principle some reliable correlations among the parameters of
these phenomena, this work will be focused on the review of the correlations already
present in literature together with the exploration of new possible correlations among
all the properties of GRB-SNe. In this work many correlations from literature have
been confirmed, such as: the Dainotti relation, namely the relation between the time
at the end of plateau of GRBs in the rest-frame, and the luminosity at the same time;
the Amati relation, which links the equivalent isotropic energy Eiso to the intrinsic
peak energy of the prompt emission in GRBs, Epeak. New correlations have been
highlighted, such as the one between the log10 of nickel mass of the SN, log10MNi
and the log10 of Epeak. In the end, the Efron and Petrosian method (1992) is tested
in this last correlation and the result is that the correlation coefficient is clos |
| Diplome : |
Master 2 |
| Permalink : |
https://bu.umc.edu.dz/master/index.php?lvl=notice_display&id=15062 |
Correlations of GRB Physical Properties : Review and Exploration [texte imprimé] / Mohamed Islam Khadir, Auteur ; Nidhal Guessoum, Directeur de thèse . - CONSTANTINE [ALGERIE] : Université Frères Mentouri Constantine, 2021 . - 59 f. ; 30 cm. Une copie electronique PDF disponible au BUC Langues : Anglais ( eng)
| Catégories : |
Sciences Exactes:Physique
|
| Tags : |
Review and Exploration |
| Index. décimale : |
530 Physique |
| Résumé : |
The study of our universe requires different observational data to test the cosmological models and to understand the structure and the evolution of the cosmos. Among
all the known astrophysical sources, a key role is played by the so-called standard
candles: namely astrophysical objects or phenomena that possess a fixed luminosity
or whose luminosity is characterized by an intrinsic correlation with the other physical parameters. So far, scientists have succeeded in standardizing some interesting
objects, such as Supernovae Type Ia (SNe Ia) and Cepheids. The presence of the
standard candles is crucial since these allow to estimate their distances and, thus,
to obtain hints on the shape of the universe. Many more candidates are expected
to be standardized in the next future, such as the Gamma-ray Bursts (GRBs) and
the quasars, since these will be able to extend the Hubble diagram and the cosmological test to a further range of redshifts. Among the promising candidate to be
standardized a particular interest is aroused by the Gamma-ray Bursts associated
with Supernovae, namely the GRB-SNe. The GRB-SNe are observed up to redshift
z ∼ 1 and are characterized by a SN explosion that emerges in the late afterglow of
the GRB. As pointed out by scientists like Cano (2014), these particular phenomena
have the potential to be considered as standard candles. Since the standardization of
the GRB-SNe needs in principle some reliable correlations among the parameters of
these phenomena, this work will be focused on the review of the correlations already
present in literature together with the exploration of new possible correlations among
all the properties of GRB-SNe. In this work many correlations from literature have
been confirmed, such as: the Dainotti relation, namely the relation between the time
at the end of plateau of GRBs in the rest-frame, and the luminosity at the same time;
the Amati relation, which links the equivalent isotropic energy Eiso to the intrinsic
peak energy of the prompt emission in GRBs, Epeak. New correlations have been
highlighted, such as the one between the log10 of nickel mass of the SN, log10MNi
and the log10 of Epeak. In the end, the Efron and Petrosian method (1992) is tested
in this last correlation and the result is that the correlation coefficient is clos |
| Diplome : |
Master 2 |
| Permalink : |
https://bu.umc.edu.dz/master/index.php?lvl=notice_display&id=15062 |
|
Affiner la recherche
