371 citations · 6.4k across the 129 of their papers we have counts for
25 papers · 1 filter
Evolution in the properties of Lyman-alpha emitters from redshifts z ~ 3 to z ~ 2
Kim K. Nilsson, Christian Tapken, Palle Moeller +5
Context: Narrow-band surveys for Ly-alpha emitters (LAEs) is a powerful tool in detecting high, and very high, redshift galaxies. Even though samples are growing at redshifts z = 3…
IMAGES-III: The evolution of the Near-Infrared Tully-Fisher relation over the last 6 Gyr
M. Puech, H. Flores, F. Hammer +22
Using the multi-integral field spectrograph GIRAFFE at VLT, we have derived the K-band Tully-Fisher relation (TFR) at z~0.6 for a representative sample of 65 galaxies with emission…
IMAGES II. A surprisingly low fraction of undisturbed rotating spiral disks at z~0.6: The morpho-kinematical relation 6 Gyrs ago
B. Neichel, F. Hammer, M. Puech +21
We present a first combined analysis of the morphological and dynamical properties for the Intermediate MAss Galaxy Evolution Sequence (IMAGES) sample. It is a representative sampl…
Continuum subtracting Lyman-alpha images: Low redshift studies using the Solar Blind Channel of HST/ACS
Matthew Hayes, Goran Ostlin, J. Miguel Mas-Hesse +1
[ABRIDGED] We are undertaking an imaging study of local star-forming galaxies in the Lyman-alpha (Lya) emission line using the Solar Blind Channel (SBC) of the ACS onboard the HST.…
The Lyman alpha morphology of local starburst galaxies: release of calibrated images
Goran Ostlin, Matthew Hayes, Daniel Kunth +4
We present reduced and calibrated high resolution Lyman-alpha (Lya) images for a sample of 6 local star forming galaxies. Targets were selected to represent a range in luminosity a…
Star-gas decoupling and a non-rotating stellar core in He 2-10: Integral field spectroscopy with FLAMES/ARGUS
T. Marquart, K. Fathi, G. Östlin +3
We study the two-dimensional distribution and kinematics of the stellar and gaseous components in the centre of the blue compact dwarf galaxy, He 2-10. The aim is to compare the ki…
Nuclear spirals as feeding channels to the Supermassive Black Hole: the case of the galaxy NGC 6951
Thaisa Storchi-Bergmann, Oli L. Dors, Rogemar A. Riffel +5
We report the discovery of gas streaming motions along nuclear spiral arms towards the LINER nucleus of the galaxy NGC 6951. The observations, obtained using the GMOS integral fiel…
Are the most metal-poor galaxies young?
Daniel Kunth, Goran Ostlin
We review the possibility that metallicity could provide a diagnostic for the age of a galaxy, hence that the most metal-poor star forming galaxies in the local universe may be gen…
Spatially resolved properties of the GRB 060505 host: implications for the nature of the progenitor
Christina C. Thoene, Johan P. U. Fynbo, Goeran Oestlin +12
GRB 060505 was the first well-observed nearby possible long-duration GRB that had no associated supernova. Here we present spatially resolved spectra of the host galaxy of GRB 0605…
Adaptive Optics Discovery of Supernova 2004ip in the Nuclear Regions of the Luminous Infrared Galaxy IRAS 18293-3413
S. Mattila, P. Vaisanen, D. Farrah +9
We report a supernova discovery in Ks-band images from the NAOS CONICA adaptive optics (AO) system on the ESO Very Large Telescope (VLT). The images were obtained as part of a near…
The Red Halo Phenomenon
E. Zackrisson, N. Bergvall, G. Ostlin +2
Optical and near-IR observations of the halos of disk galaxies and blue compact galaxies have revealed a very red spectral energy distribution, which cannot easily be reconciled wi…
3D spectroscopy with VLT/GIRAFFE - II: Are Luminous Compact Galaxies merger remnants ?
M. Puech, F. Hammer, H. Flores +2
Luminous Compact Galaxies are enigmatic sources by many aspects. They can reach the luminosity of the Milky Way within a radius of only a few kpc. They also represent one of the mo…
The dark matter halos of the bluest low surface brightness galaxies
E. Zackrisson, N. Bergvall, T. Marquart +1
We present BVI photometry and long-slit Halpha rotation curve data obtained with ESO VLT/FORS2 for six low surface brightness galaxies with extremely blue colours and very faint ce…
On the nature of nearby GRB/SN host galaxies
J. Sollerman, G. Ostlin, J. P. U. Fynbo +3
We present and discuss optical diagnostics of the low redshift (z<0.2) galaxies that are known to have hosted supernovae associated with gamma-ray bursts (GRBs). The three galaxies…
The stellar populations of the bluest low surface brightness galaxies
E. Zackrisson, N. Bergvall, G. Ostlin
Using optical/near-IR broadband photometry together with Halpha emission line data, we attempt to constrain the star formation histories, ages, total stellar masses and stellar mas…
The starburst phenomenon from the optical/near-IR perspective
Nils Bergvall, Thomas Marquart, Göran Östlin +1
The optical/near-IR stellar continuum carries unique information about the stellar population in a galaxy, its mass function and star-formation history. Star-forming regions displa…
Extended Tidal Structure In Two Lyman Alpha-Emitting Starburst Galaxies
John M. Cannon, Evan D. Skillman, Daniel Kunth +4
We present new VLA C-configuration HI imaging of the Lyman Alpha-emitting starburst galaxies Tol 1924-416 and IRAS 08339+6517. The effective resolution probes neutral gas structure…
The temporal and spatial evolution of the starburst in ESO 338-IG04 as probed by its star clusters
G. Ostlin, E. Zackrisson, N. Bergvall +1
In this paper we use ultra-violet (UV) and optical HST photometry in five bands, and an extensive set of spectral evolutionary synthesis scenarios to investigate the age and masses…
Stellar Masses of Luminous Compact Blue Galaxies at Redshifts z=0.4-1.2
R. Guzman, G. Ostlin, D. Kunth +3
We present stellar mass measurements for a sample of 36 Luminous Compact Blue Galaxies (LCBGs) at redshifts z = 0.4-1.2 in the Flanking Fields around the Hubble Deep Field North. T…
Dynamics of blue compact galaxies, as revealed by their H velocity fields II. Mass models and the starburst triggering mechanism
G. Ostlin, P. Amram, N. Bergvall +3
The H velocity fields of a sample of six luminous blue compact galaxies (BCGs) and two companions have been obtained by observations with a scanning Fabry-Perot interferometer.…
Massive star clusters in dwarf starburst galaxies
G. Ostlin
I will discuss the presence of massive star clusters in starburst galaxies with an emphasis on low mass galaxies outside the local group. I will show that such galaxies, with respe…
The most metal-poor galaxies
D. Kunth, G. Ostlin
Metallicity is a key parameter that controls many aspects in the formation and evolution of stars and galaxies. In this review we focus on the metal deficient galaxies, in particul…
Starburst dwarfs - fueling and morphological evolution
Nils Bergvall, Goran Ostlin, Josefa Masegosa +1
The effects of mergers in low mass galaxies are poorly understood. In this paper we analyze different observational evidences which support the view that mergers can trigger starbu…
Globular Clusters in Blue Compact Galaxies as Tracers of the Starburst History
G. Östlin
Representing single stellar populations, globular clusters (GCs) are relatively easy to model, thus providing powerful tools for studying the evolution of galaxies. This has been d…