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pro vyhledávání: '"Björnsson, Gunnlaugur"'
Autor:
Björnsson, Gunnlaugur
Publikováno v:
ApJ 887, 219 (2019)
The observed properties of long gamma-ray burst (GRB) host galaxies show them to often be of a rather low metallicity and/or of high specific star formation rate (SFR). It is not clear which of these properties is a dominant factor in determining if
Externí odkaz:
http://arxiv.org/abs/1912.08511
Observations of gamma-ray burst (GRB) afterglows have long provided the most detailed information about the origin of this spectacular phenomena. The model that is most commonly used to extract physical properties of the event from the observations i
Externí odkaz:
http://arxiv.org/abs/1805.05875
Aims: Use the standard fireball model to create virtual populations of gamma-ray burst afterglows and study their luminosity functions. Methods: We randomly vary the parameters of the standard fireball model to create virtual populations of afterglow
Externí odkaz:
http://arxiv.org/abs/0707.3432
Publikováno v:
Astrophys.J. 640 (2006) L5-L8
In gamma-ray burst research it is quite common to fit the afterglow light curves with a broken power law to interpret the data. We apply this method to a computer simulated population of afterglows and find systematic differences between the known mo
Externí odkaz:
http://arxiv.org/abs/astro-ph/0602219
Autor:
Björnsson, Gunnlaugur
Polarization has been observed in a number of GRB afterglows. We briefly review the models that have been proposed to account for the observed polarization levels. We summarize the observations and the attempts to explain them with existing models.
Externí odkaz:
http://arxiv.org/abs/astro-ph/0302177
Autor:
Hjorth, Jens, Thomsen, Bjarne, Nielsen, Svend R., Andersen, Michael I., Holland, Stephen T., Fynbo, Johan U., Pedersen, Holger, Jaunsen, Andreas O., Halpern, Jules P., Fesen, Robert, Gorosabel, Javier, Castro-Tirado, Alberto, McMahon, Richard G., Hoenig, Michael D., Björnsson, Gunnlaugur, Amati, Lorenzo, Tanvir, Nial R., Natarajan, Priyamvada
Publikováno v:
Astrophys.J. 576 (2002) 113-119
We report the identification of the optical afterglow of GRB 980613 in R- and I-band images obtained between 16 and 48 hours after the gamma-ray burst. Early near-infrared (NIR) H and K' observations are also reported. The afterglow was optically fai
Externí odkaz:
http://arxiv.org/abs/astro-ph/0205126
Autor:
Castro-Tirado, Alberto J., Zapatero-Osorio, María Rosa, Caon, Nicola, Cairós, Luz Marina, Hjorth, Jens, Pedersen, Holger, Andersen, Michael I., Gorosabel, Javier, Bartolini, Corrado, Guarnieri, Adriano, Piccioni, Adalberto, Frontera, Filippo, Masetti, Nicola, Palazzi, Eliana, Pian, Elena, Greiner, Jochen, Hudec, Renè, Sagar, Ram, Pandey, Anil K., Mohan, Vinay, Björnsson, Gunnlaugur, Jakobsson, Páll, Burud, Ingunn, Courbin, Frederic, Valentini, Gaetano, Piersimoni, Anna, Aceituno, Jesús, Montoya, Luz María, Pedraz, Santos, Gredel, Roland, Claver, Charles F., Rector, Travis A., Rhoads, James E., Walter, Fabian, Ott, Jürgen, Hippelein, Hans, Sánchez-Béjar, Victor, Gutiérrez, Carlos, Oscoz, Alejandro, Zhu, Jin, Chen, Jiansheng, Zhang, Haotong, Wei, Jianyan, Zhou, Aiying, Guiziy, Sergei, Shlyapnikov, Aleksei, Heise, John, Costa, Enrico, Feroci, Marco, Piro, Luigi
Publikováno v:
Science, 1999 Mar . 283(5410), 2069-2073.
Externí odkaz:
https://www.jstor.org/stable/2896693
Autor:
Hjorth, Jens, Björnsson, Gunnlaugur, Andersen, Michael I., Caon, Nicola, Cairós, Luz Marina, Castro-Tirado, Alberto J., Pedersen, Holger, Costa, Enrico
Publikováno v:
Science, 1999 Mar . 283(5410), 2073-2075.
Externí odkaz:
https://www.jstor.org/stable/2896694
Autor:
Björnsson, Gunnlaugur
第8回極域科学シンポジウム/横断セッション：[IA] 北極国際連携拠点の新展開12月8日（金）国立極地研究所 2階大会議室The Eighth Symposium on Polar Science/Interdisciplinary sessions: [IA] New insights of over
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=jairo_______::701b79350f426ea94203956c447b25ad
http://id.nii.ac.jp/1291/00014369/
http://id.nii.ac.jp/1291/00014369/
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