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Gunnlaugur Björnsson - Research Scientist

Gunnlaugur Björnsson

–

School of Engineering and Natural Sciences

Gunnlaugur Björnsson

Research Scientist

Location
Tæknigarður / Tg-322
Phone
525 - 4792
Email
gulli [at] hi.is

Unit
The Institute of Physical Sciences, Physics Division
Website
https://notendur.hi.is/gulli/

Published works

2024

Modelling of long gamma-ray burst host galaxies at cosmic noon from damped Lyman-α absorption statisticsMonthly Notices of the Royal Astronomical Society

2021

GRB host galaxies with strong H₂absorptionMonthly Notices of the Royal Astronomical Society

2019

Gamma-Ray Burst Host GalaxiesAstrophysical Journal

2018

Low-energy Electrons in Gamma-Ray Burst Afterglow ModelsAstrophysical Journal Letters

2016

Study of high-latitude ionosphereJournal of Atmospheric and Solar-Terrestrial Physics

2015

THE OPTICALLY UNBIASED GRB HOST (TOUGH) SURVEY. VII. the HOST GALAXY LUMINOSITY FUNCTIONAstrophysical Journal
Interhemispheric Symmetries and Asymmetries of Aurora from Ground-Based Conjugate Observations
Development of conjugate aurora observation in IcelandAdvanced Science Letters

2014

GRB 120422A/SN 2012bzAstronomy and Astrophysics

2013

Large flow shears around auroral beads at substorm onsetGeophysical Research Letters
Dynamics of basaltic glass dissolution - Capturing microscopic effects in continuum scale modelsGeochimica et Cosmochimica Acta
Ground-Based Aurora Conjugacy and Dynamic Tracing of Geomagnetic Conjugate Points

2012

Galaxy counterparts of intervening high-z sub-DLAs/DLAs and Mg ii absorbers towards gamma-ray burstsAstronomy and Astrophysics
Ground-based aurora conjugacy and dynamic tracing of geomagnetic conjugate pointsGeophysical Monograph Series
Rapid-response mode VLT/UVES spectroscopy of super iron-rich gas exposed to GRB 080310Astronomy and Astrophysics

2011

Super iron-rich gas towards GRB 080310
Probing gamma-ray burst environments with time variabilityMonthly Notices of the Royal Astronomical Society
GRB070125 and the environments of spectral-line poor afterglow absorbersMonthly Notices of the Royal Astronomical Society
The circumburst density profile around GRB progenitors
Midnight sector observations of auroral omega bandsJournal of Geophysical Research: Space Physics
TEC variations at GPS stations over high-latitude and at the equatorial region
Magnetic local time dependence of geomagnetic disturbances contributing to the AU and AL indicesAnnales Geophysicae
The circumburst density profile around GRB progenitorsAstronomy and Astrophysics

2010

Varying interplanetary magnetic field B_y effects on interhemispheric conjugate auroral features during a weak substormJournal of Geophysical Research: Space Physics
ErratumAstrophysical Journal, Supplement Series
Plasma irregularities adjacent to auroral patches in the postmidnight sectorJournal of Geophysical Research: Space Physics

2009

Permanent Carbon Dioxide Storage into BasaltEnergy Procedia
Solar-terrestrial observations at bipolar conjugate points using global positioning system
Monitoring of GPS PWV variability at bipolar conjugate points
Low-resolution spectroscopy of gamma-ray burst optical afterglowsAstrophysical Journal, Supplement Series

2008

Electric field modulation behind pulsating auroraJournal of Geophysical Research: Space Physics
Numerical counterparts of GRB host galaxies

2007

GRB Host Galaxies and Galaxy EvolutionEAS Publications Series
Luminosity functions of gamma-ray burst afterglowsAstronomy and Astrophysics
Luminosity distribution of GRB afterglows
Numerical counterparts of GRB host galaxiesMonthly Notices of the Royal Astronomical Society

2006

Numerical simulations of host galaxies of gamma-ray bursts
Afterglow light curves and broken power lawsAstrophysical Journal
Probing cosmic chemical evolution with gamma-ray bursts: GRB060206 at z=4.048Astronomy and Astrophysics
Energy injection in gamma-ray burst afterglow modelsAstrophysical Journal
H I column densities of z > 2 Swift gamma-ray burstsAstronomy and Astrophysics

2005

Modelling GRB 021004 by multiple energy injectionsNuovo Cimento della Societa Italiana di Fisica C
Energy injection episodes in GRBsNuovo Cimento della Societa Italiana di Fisica C
Lyα and ultraviolet emission from high-redshift gamma-ray burst hostsMonthly Notices of the Royal Astronomical Society
The GRB 030329 hostAstronomy and Astrophysics
Lyα and UV emission from high-redshift GRB hosts: To what extent do GRBs trace star formation?Monthly Notices of the Royal Astronomical Society
PROPERTIES OF LY-α AND GAMMA RAY BURST SELECTED STARBURSTS AT HIGH REDSHIFTS
Modelling the afterglow of GRB 021004 with multiple energy injections
Host Galaxies of Gamma-Ray Bursts and Galaxy Formation
GRB 021004 modelled by multiple energy injectionsAstronomy and Astrophysics
Spectro-photometric study of the GRB 030329 host galaxyNuovo Cimento della Societa Italiana di Fisica C
Low energy response of a prototype detector array for the PoGO astronomical hard X-ray polarimeterProceedings of SPIE - The International Society for Optical Engineering
Star formation efficiency and host galaxies of Gamma-Ray BurstsNuovo Cimento della Societa Italiana di Fisica C

2004

Dispersion of Light and the Geometric Structure of the UniverseRAUST - Tímarit um raunvísindi og stærðfræði
The line-of-sight towards GRB 030429 at z = 2.66Astronomy and Astrophysics
Energy injection episodes in gamma-ray burstsAstrophysical Journal
Swift identification of dark gamma-ray burstsAstrophysical Journal
Host galaxies of gamma-ray bursts and their cosmological evolutionMonthly Notices of the Royal Astronomical Society
Host Galaxies of Gamma-Ray BurstsRAUST - Tímarit um raunvísindi og stærðfræði
Líkan af glæðum gammablossaRAUST - Tímarit um raunvísindi og stærðfræði

2003

Polarization in GRB Afterglows
An HST study of three very faint GRB host galaxiesAstronomy and Astrophysics

2002

Dark energy and the observable universeAstrophysical Journal
The afterglow of GRB 010222Astrophysical Journal
Afstæðilegir strókar í gammablossum
Hulduorka og þróun hins sýnilega heims
The afterglow and complex environment of the optically dim burst GRB 980613Astrophysical Journal

2001

A Deep, High-Resolution Imaging Survey of GRB Host Galaxies
The jet and the supernova in GRB 990712Astrophysical Journal
The Jet and the Supernova in GRB~990712
The host galaxy and optical light curve of the gamma-ray burst GRB 980703Astronomy and Astrophysics
The jet and circumburst stellar wind of GRB 980519Astrophysical Journal
The afterglow of the short/intermediate durtation gamma-ray burst GRB 000301C: A jet at z=2.04Astronomy and Astrophysics

2000

Accretion disks phase transitionsPublications of the Astronomical Society of Japan
Hubble Space Telescope Space Telescope Imaging Spectrograph imaging of the host galaxy of GRB 980425/sn 1998bwAstrophysical Journal
The polarization variability in the optical afterglow of GRB 990712Astrophysical Journal
The broken light curves of gamma-ray bursts GRB 990123 and GRB 990510Astronomy and Astrophysics

1999

Sýnilegir glampar gammablossa
Polarimetric constraints on the optical afterglow emission from GRB 990123Science
Decay of the GRB 990123 optical afterglowScience

1998

The role of electron-positron pairs in accretion flows
Sólir og Svarthol

1996

Modified Newtonian Potentials for the Description of Relativistic Effects in Accretion Disks Around Black HolesAstrophysical Journal
Hot Accretion Disks RevisitedAstrophysical Journal
Structure of Accretion Disks with Optically Thick-Optically Thin TransitionsAstrophysical Journal

1995

A General Formula for Radiative Cooling and Global Structure of the Accretion Disk
Optically thin accretion disks in the Kerr metricAstrophysical Journal
Cosmological Observations in a Closed UniverseMonthly Notices of the Royal Astronomical Society

1994

Stjarnfræðilegar athuganir í hrynjandi veröld

1992

Heitar gasskífur umhverfis svarthol
Hot pair-dominated accretion disksAstrophysical Journal
Limit Cycles in Pair Dominated Accretion Disks

1991

A Recipe for Making Hot Accretion Disks
A recipe for making hot accretion disksAstrophysical Journal
A New Approach to Hot Accretion Disks
On the stability of electron-positron pair equilibria and the X-ray variability of active galactic nucleiMonthly Notices of the Royal Astronomical Society