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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

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
Development of conjugate aurora observation in IcelandAdvanced Science Letters
Interhemispheric Symmetries and Asymmetries of Aurora from Ground-Based Conjugate Observations

2014

GRB 120422A/SN 2012bzAstronomy and Astrophysics

2013

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

2012

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

2011

Magnetic local time dependence of geomagnetic disturbances contributing to the AU and AL indicesAnnales Geophysicae
TEC variations at GPS stations over high-latitude and at the equatorial region
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
Midnight sector observations of auroral omega bandsJournal of Geophysical Research: Space Physics
The circumburst density profile around GRB progenitorsAstronomy and Astrophysics
Super iron-rich gas towards GRB 080310
The circumburst density profile around GRB progenitors

2010

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

2009

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

2008

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

2007

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

2006

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

2005

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

2004

Swift identification of dark gamma-ray burstsAstrophysical Journal
Líkan af glæðum gammablossaRAUST - Tímarit um raunvísindi og stærðfræði
Host Galaxies of Gamma-Ray BurstsRAUST - Tímarit um raunvísindi og stærðfræði
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
Host galaxies of gamma-ray bursts and their cosmological evolutionMonthly Notices of the Royal Astronomical Society
Energy injection episodes in gamma-ray burstsAstrophysical Journal

2003

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

2002

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

2001

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

2000

The polarization variability in the optical afterglow of GRB 990712Astrophysical Journal
Hubble Space Telescope Space Telescope Imaging Spectrograph imaging of the host galaxy of GRB 980425/sn 1998bwAstrophysical Journal
Accretion disks phase transitionsPublications of the Astronomical Society of Japan
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

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

1996

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

1995

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

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

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