The unusual gamma-ray burst GRB 101225A from a helium star/neutron star merger at redshift 0.33

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F11%3A00371960" target="_blank" >RIV/68378271:_____/11:00371960 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1038/nature10611" target="_blank" >http://dx.doi.org/10.1038/nature10611</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/nature10611" target="_blank" >10.1038/nature10611</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The unusual gamma-ray burst GRB 101225A from a helium star/neutron star merger at redshift 0.33

Popis výsledku v původním jazyce

Here we report observations of the unusual GRB 101225A. Its ?-ray emission was exceptionally long-lived and was followed by a bright X-ray transient with a hot thermal component and an unusual optical counterpart. During the first 10 days, the optical emission evolved as an expanding, cooling black body, after which an additional component, consistent with a faint supernova, emerged. We estimate its redshift to be z = 0.33 by fitting the spectral-energy distribution and light curve of the optical emission with a GRB-supernova template. Deep optical observations may have revealed a faint, unresolved host galaxy. Our proposed progenitor is a merger of a helium star with a neutron star that underwent a common envelope phase, expelling its hydrogen envelope. The resulting explosion created a GRB-like jet which became thermalized by interacting with the dense, previously ejected material, thus creating the observed black body, until finally the emission from the supernova dominated.

Název v anglickém jazyce

The unusual gamma-ray burst GRB 101225A from a helium star/neutron star merger at redshift 0.33

Popis výsledku anglicky

Here we report observations of the unusual GRB 101225A. Its ?-ray emission was exceptionally long-lived and was followed by a bright X-ray transient with a hot thermal component and an unusual optical counterpart. During the first 10 days, the optical emission evolved as an expanding, cooling black body, after which an additional component, consistent with a faint supernova, emerged. We estimate its redshift to be z = 0.33 by fitting the spectral-energy distribution and light curve of the optical emission with a GRB-supernova template. Deep optical observations may have revealed a faint, unresolved host galaxy. Our proposed progenitor is a merger of a helium star with a neutron star that underwent a common envelope phase, expelling its hydrogen envelope. The resulting explosion created a GRB-like jet which became thermalized by interacting with the dense, previously ejected material, thus creating the observed black body, until finally the emission from the supernova dominated.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BF - Elementární částice a fyzika vysokých energií

OECD FORD obor

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Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Nature

ISSN

0028-0836

e-ISSN

—

Svazek periodika

480

Číslo periodika v rámci svazku

7375

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

3

Strana od-do

72-74

Kód UT WoS článku

000298031900035

EID výsledku v databázi Scopus

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