Clustering of galaxies around gamma-ray burst sight-lines

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F13%3A00205535" target="_blank" >RIV/68407700:21670/13:00205535 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.aanda.org/articles/aa/pdf/2013/04/aa21247-13.pdf" target="_blank" >http://www.aanda.org/articles/aa/pdf/2013/04/aa21247-13.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/201321247" target="_blank" >10.1051/0004-6361/201321247</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Clustering of galaxies around gamma-ray burst sight-lines

Popis výsledku v původním jazyce

There is evidence of an overdensity of strong intervening MgII absorption line systems distributed along the lines of sight toward gamma-ray burst (GRB) afterglows relative to quasar sight-lines. If this excess is real, one should also expect an overdensity of field galaxies around GRB sight-lines, as strong MgII tends to trace these sources. In this work, we test this expectation by calculating the two point angular correlation function of galaxies within 120 '' (similar to 470 h(71)(-1) Kpc at < z > similar to 0.4) of GRB afterglows. We compare the gamma-ray burst optical and near-infrared detector (GROND) GRB afterglow sample - one of the largest and most homogeneous samples of GRB fields - with galaxies and active galactic nuclei found in the COSMOS-30 photometric catalog. We find no significant signal of anomalous clustering of galaxies at an estimated median redshift of z similar to 0.3 around GRB sight-lines, down to K-AB < 19.3. This result is contrary to the expectations from

Název v anglickém jazyce

Clustering of galaxies around gamma-ray burst sight-lines

Popis výsledku anglicky

There is evidence of an overdensity of strong intervening MgII absorption line systems distributed along the lines of sight toward gamma-ray burst (GRB) afterglows relative to quasar sight-lines. If this excess is real, one should also expect an overdensity of field galaxies around GRB sight-lines, as strong MgII tends to trace these sources. In this work, we test this expectation by calculating the two point angular correlation function of galaxies within 120 '' (similar to 470 h(71)(-1) Kpc at < z > similar to 0.4) of GRB afterglows. We compare the gamma-ray burst optical and near-infrared detector (GROND) GRB afterglow sample - one of the largest and most homogeneous samples of GRB fields - with galaxies and active galactic nuclei found in the COSMOS-30 photometric catalog. We find no significant signal of anomalous clustering of galaxies at an estimated median redshift of z similar to 0.3 around GRB sight-lines, down to K-AB < 19.3. This result is contrary to the expectations from

Druh

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

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

Astronomy and Astrophysics

ISSN

0004-6361

e-ISSN

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Svazek periodika

552

Číslo periodika v rámci svazku

—

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

8

Strana od-do

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Kód UT WoS článku

000317912000142

EID výsledku v databázi Scopus

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