Bienvenue chez nous!
Logo Ex Libris

Spectral Energy Distributions of Gamma Ray Burst Host Galaxies

  • Couverture cartonnée
  • 76 Nombre de pages
This work is concentrated on the fitting of the Spectral Energy Distribution (SED) templates to the broad-band observational data ... Lire la suite
CHF 65.00
Habituellement expédié sous 3 à 4 jours ouvrés.

Description

This work is concentrated on the fitting of the Spectral Energy Distribution (SED) templates to the broad-band observational data of Gamma Ray Bursts (GRB) host galaxies, which were bright in submillimetre and/or radio wavelengths, namely hosts of GRB 980703, GRB 000210, GRB 000418 and GRB 010222. This is the first successful entire SED fitting, from optical to radio wavelengths, achieved for GRB hosts. I present constraints on their properties, including the need for high dust temperatures, high star formation rates (SFR) and low ages. I estimated very conservative and robust lower limits on the dust temperatures in a range from T 29 K to T 59 K. Their SFRs derived from infrared emission range from 179 to 1211 solar masses per year and it places GRB hosts in a category of highly star-forming galaxies. I propose that the seeming contradiction of high SFRs and blue optical colors of GRB hosts can be explained by their low ages in a range from 90 Myr to 2 Gyr.

Auteur

Michal Jerzy Michalowski, MSc: studied Astronomy at the DarkCosmology Centre, Niels Bohr Institute, University of Copenhagen,Denmark and Astronomical Observatory, Adam Mickiewicz University,Poznan, Poland. Currently a PhD student at the Dark CosmologyCentre. Main research interests: star-forming galaxies, gamma-rayburst hosts, submm galaxies.



Texte du rabat

This work is concentrated on the fitting of theSpectral Energy Distribution (SED) templates to thebroad-band observational data of Gamma Ray Bursts(GRB) host galaxies, which were bright insubmillimetre and/or radio wavelengths, namely hostsof GRB 980703, GRB 000210, GRB 000418 and GRB 010222.This is the first successful entire SED fitting, fromoptical to radio wavelengths, achieved for GRB hosts.I present constraints on their properties, includingthe need for high dust temperatures, high starformation rates (SFR) and low ages. I estimated veryconservative and robust lower limits on the dusttemperatures in a range from T 29 K to T 59 K.Their SFRs derived from infrared emission range from179 to 1211 solar masses per year and it places GRBhosts in a category of highly star-forming galaxies.I propose that the seeming contradiction of high SFRsand blue optical colors of GRB hosts can be explainedby their low ages in a range from 90 Myr to 2 Gyr.

Détails sur le produit

Titre: Spectral Energy Distributions of Gamma Ray Burst Host Galaxies
Auteur:
Code EAN: 9783639160260
ISBN: 978-3-639-16026-0
Format: Couverture cartonnée
Genre: Physique et astronomie
nombre de pages: 76
Poids: 130g
Taille: H220mm x B150mm x T5mm
Année: 2009