Feltzing, S., Eriksson, K., Kleyna, J., Wilkinson, M. I.
Aim: We establish the mean metallicity from high-resolution spectroscopy for the recently found dwarf spheroidal galaxy Bootes I and test whether it is a common feature for ultra-faint dwarf...
A new low mass for the Hercules dSph: the end of a common mass scale for the dwarfs? (2009)
Adén, D., Wilkinson, M. I., Read, J. I., Feltzing, S., Koch, A., Gilmore, G. F., ...
We present a new mass estimate for the Hercules dwarf spheroidal galaxy (dSph), based on the revised velocity dispersion obtained by Aden et al. (2009, arXiv:0908.3489). The removal of a significant...
The Galactic thin and thick discs in the context of galaxy formation (2009)
We have obtained high-resolution spectra and carried out a detailed elemental abundance analysis for a new sample of 899 F and G dwarf stars in the Solar neighbourhood. The results allow us to, in a...
A photometric and spectroscopic study of the new dwarf spheroidal galaxy in Hercules (2009)
Adén, D., Feltzing, S., Koch, A., Wilkinson, M. I., Grebel, E. K., Lundström, I., ...
Our aim is to provide as clean and as complete a sample as possible of red giant branch stars that are members of the Hercules dSph galaxy. With this sample we explore the velocity dispersion and the...
Elemental abundances in the Galactic bulge from microlensed dwarf stars (2009)
Bensby, T., Feltzing, S., Johnson, J. A., Gould, A., Sana, H., Gal-Yam, A., ...
We present elemental abundances of 13 microlensed dwarf and subgiant stars in the Galactic bulge, which constitute the largest sample to date. We show that these stars span the full range of...
Abundance structure and chemical evolution of the Galactic disc (2009)
We have obtained high-resolution, high signal-to-noise spectra for 899 F and G dwarf stars in the Solar neighbourhood. The stars were selected on the basis of their kinematic properties to trace the...
OGLE-2009-BLG-076S - The most metal-poor dwarf star in the Galactic bulge (2009)
Bensby, T., Feltzing, S., Johnson, J. A., Gal-Yam, A., Udalski, A., Gould, A., ...
Measurements based on a large number of red giant stars suggest a broad metallicity distribution function (MDF) for the Galactic bulge, centered on [Fe/H]=-0.1. However, recently, a new opportunity...
Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars (2009)
Bensby, T., Johnson, J. A., Cohen, J., Feltzing, S., Udalski, A., Gould, A., ...
Aims. Our aims are twofold. First we aim to evaluate the robustness and accuracy of stellar parameters and detailed elemental abundances that can be derived from high-resolution spectroscopic...
Bensby, T., Johnson, J. A., Cohen, J., Feltzing, S., Udalski, A., Gould, A., ...
AIMS. Our aims are twofold. First we aim to evaluate the robustness and accuracy of stellar parameters and detailed elemental abundances that can be derived from high-resolution spectroscopic...
The age of the Galaxy's thick disk (2008)
We discuss the age of the stellar disks in the solar neighbourhood. After reviewing the various methods for age dating we discuss current estimates of the age of both the thin and the thick disk. We...
The Galactic Stellar Disc (2008)
The study of the Milky Way stellar discs in the context of galaxy formation is discussed. In particular we explore the properties of the Milky Way disc using a new sample of about 550 dwarf stars for...
Feltzing, S., Primas, F., Johnson, R. A.
[ABRIDGED] Metal-rich globular clusters provide important tracers of the formation of our Galaxy. Moreover, and not less important, they are very important calibrators for the derivation of...
Tracing the Galactic thick disk to Solar metallicities (2007)
Bensby, T., Zenn, A. R., Oey, M. S., Feltzing, S.
We show that the Galactic thick disk reaches at least solar metallicities, and that it experienced strong chemical enrichment during a period of ~3 Gyr, ending around 8-9 Gyr ago. This finding puts...
Manganese trends in a sample of thin and thick disk stars. The origin of Mn (2007)
Feltzing, S., Fohlman, M., Bensby, T.
CONTEXT: Manganese is an iron-peak element and although the nucleosynthesis path that leads to its formation is fairly well understood, it remains unclear which objects, SN II and/or SN Ia, that...
The Determination of Stellar Parameters of Giants in the Galactic Disks and Bulge (2007)
Byström, J., Ryde, N., Feltzing, S., Holmberg, J., Bensby, T.
Here, we present our on-going work on the determination of stellar parameters of giants in the Galactic Disks and Bulge observed with UVES on the VLT. We present some preliminarily results.
The determination of stellar parameters of giants in the galactic disks and bulge (2007)
Byström, J., Ryde, N., Feltzing, S., Holmberg, J., Bensby, T.
Here, we present our on-going work on the determination of stellar parameters of giants in the Galactic Disks and Bulge observed with UVES on the VLT. We present some preliminarily results.
Disentangling the Hercules stream (2006)
Bensby, T., Oey, M. S., Feltzing, S., Gustafsson, B.
Using high-resolution spectra of nearby F and G dwarf stars, we have investigated the detailed abundance and age structure of the Hercules stream. We find that the stars in the stream have a wide...
The nature of the metal-rich thick disk (2006)
Bensby, T., Zenn, A. R., Oey, M. S., Feltzing, S.
We have traced the Galactic thick disk to its, to date, highest metallicities. Based on high-resolution spectroscopic observations of 187 F and G dwarf stars that kinematically can be associated...
Faria, D., Feltzing, S., Lundstrom, I., Gilmore, G., Wahlgren, G. M., Ardeberg, A., ...
In this paper we demonstrate how Stromgren uvby photometry can be efficiently used to: 1. Identify red giant branch stars that are members in a dwarf spheroidal galaxy. 2. Derive age-independent...
Elemental abundance trends in the metal-rich thin and thick disks (2006)
Thick disks are common in spiral and S0 galaxies and seem to be an inherent part of galaxy formation and evolution. Our own Milky Way is host to an old thick disk. The stars associated with this disk...
Hercules stream stars and the metal-rich thick disk (2006)
Bensby, T., Oey, M. S., Feltzing, S., Gustafsson, B.
Using the MIKE spectrograph, mounted on the 6.5 m Magellan/Clay telescope at the Las Campanas observatory in Chile, we have obtained high-resolution spectra for 60 F and G dwarf stars, all likely...
The origin and chemical evolution of carbon in the Galactic thin and thick disks (2006)
[ABRIDGED] In order to trace the origin and evolution of carbon in the Galactic disk we have determined carbon abundances in 51 nearby F and G dwarf stars. The sample is divided into two...
Carbon Abundances in the Galactic Thin and Thick Disks (2005)
Although carbon is, together with oxygen and nitrogen, one of the most important elements in the study of galactic chemical evolution its production sites are still poorly known and have been much...
alpha-, r-, and s-process element trends in the Galactic thin and thick disks (2004)
Bensby, T., Feltzing, S., Lundström, I., Ilyin, I.
From a detailed elemental abundance analysis of 102 F and G dwarf stars we present abundance trends in the Galactic thin and thick disks for 14 elements (O, Na, Mg, Al, Si, Ca, Ti, Cr, Fe, Ni, Zn, Y,...
A possible age-metallicity relation in the Galactic thick disk? (2004)
Bensby, T., Feltzing, S., Lundstrom, I.
A sample of 229 nearby thick disk stars has been used to investigate the existence of an age-metallicity relation (AMR) in the Galactic thick disk. The results indicate that that there is indeed an...
Oxygen trends in the Galactic thin and thick disks (2004)
Bensby, T., Feltzing, S., Lundström, I.
We present oxygen abundances for 72 F and G dwarf stars in the solarneighbourhood. Using the kinematics of the stars we divide them into twosub-samples with space velocities that are typical for the...
alpha-, r-, and s-process element trends in the Galactic thin and thick disks (2004)
Bensby, T., Feltzing, S., Lundström, I., Ilyin, I.
From a detailed elemental abundance analysis of 102 F and G dwarf starswe present abundance trends in the Galactic thin and thick disks for 14elements (O, Na, Mg, Al, Si, Ca, Ti, Cr, Fe, Ni, Zn, Y,...
A possible age-metallicity relation in the Galactic thick disk? (2004)
Bensby, T., Feltzing, S., Lundström, I.
A sample of 229 nearby thick disk stars has been used to investigate theexistence of an age-metallicity relation (AMR) in the Galactic thickdisk. The results indicate that that there is indeed an...
Thin and Thick Disk Results for α-, r- and s-Process Elements (2004)
Feltzing, S., Bensby, T., Gesse, S., Lundström, I.
We present the first results from several ongoing studies of the stellara bundances, ages, and chemical trends in the long-lived dwarf stars in the solar neighborhood that belong to the thin and...
A Differential Study of the Oxygen Abundances in the Galactic Thin and Thick Disks (2004)
Bensby, T., Feltzing, S., Lundström, I.
First results from a study into the abundance trends of oxygen in the Galactic thin and thick disks are presented. Oxygen abundances for 63nearby F and G dwarf stars, based on very high resolution...
Oxygen trends in the Galactic thin and thick disks (2003)
Bensby, T., Feltzing, S., Lundstrom, I.
We present oxygen abundances for 72 F and G dwarf stars in the solar neighbourhood. Using the kinematics of the stars we divide them into two sub-samples with space velocities that are typical for...
GRB 030227: the first multiwavelength afterglow of an INTEGRAL GRB (2003)
Castro-Tirado, A. J., Gorosabel, J., Guziy, S., Reverte, D., Cerón, J. M. Castro, Postigo, A. De Ugarte, ...
We present multiwavelength observations of a gamma-ray burst detected by INTEGRAL (GRB 030227) between 5.3 hours and ~1.7 days after the event. Here we report the discovery of a dim optical afterglow...
A differential study of the oxygen abundances in the thin and thick Galactic disks (2003)
Bensby, T., Feltzing, S., Lundström, I.
First results from a study into the abundance trends of oxygen in the Galactic thin and thick disks are presented. Oxygen abundances for 63 nearby F and G dwarf stars, based on very high resolution...
GRB 030227 : The first multiwavelength afterglow of an INTEGRAL GRB (2003)
Castro-Tirado, A. J., Gorosabel, J., Guziy, S., Reverte, D., Castro Cerón, J. M., ...
We present multiwavelength observations of a gamma-ray burst detected byINTEGRAL (GRB 030227) between 5.3 hours and ~ 1.7days after the event. Here we report the discovery of a dim opticalafterglow...
Bensby, T., Feltzing, S., Lundström, I.
Based on spectra from F and G dwarf stars, we present elementalabundance trends in the Galactic thin and thick disks in the metallicityregime -0.8< [Fe/H < +0.4. Our findings can besummarized as...
Feltzing, S., Bensby, T., Lundström, I.
We present the first results of a larger study into the stellarabundances and chemical trends in long-lived dwarf stars in the solarneighbourhood that belong to (based on their kinematics) the thin...
Stellar Abundances in Giant Stars in the Metal-Rich Globular Cluster NGC 6528 (2003)
Feltzing, S., Primas, F., Johnson, R.
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Oxygen in the Galactic Thin and Thick Disks (2003)
Bensby, T., Feltzing, S., Lundström, I.
Not Available
GRB 030227: The first multiwavelength afterglow of an INTEGRAL GRB (2003)
Castro-Tirado, A.J., Gorosabel, J., Guziy, S., Reverte, D., Castro Ceron, J.M., Ugarte Postigo, A. De, ...
We present multiwavelength observations of a gamma-ray burst detected by INTEGRAL (GRB 030227) between 5.3 hours and ~ 1.7 days after the event. Here we report the discovery of a dim optical...
GRB 030227 : The first multiwavelength afterglow of an INTEGRAL GRB (2003)
Castro-Tirado, A. J., Gorosabel, J., Guziy, S., Reverte, D., Castro Cerón, J. M., ...
Oxygen in the Galactic thin and thick disks (2002)
Bensby, T., Feltzing, S., Lundstrom, I.
First results from a study into the abundance trends of oxygen in the Galactic thin and thick disks are presented. Oxygen abundances for 21 thick disk and 42 thin disk F and G dwarf stars based on...
Signatures of SN Ia in the galactic thick disk (2002)
Feltzing, S., Bensby, T., Lundstrom, I.
We present the first results of a larger study into the stellar abundances and chemical trends in long-lived dwarf stars in the solar neighbourhood that belong to (based on their kinematics) the thin...
Wyse, R F G, Gilmore, G, Houdashelt, M. L., Feltzing, S., Hebb, L., Gallagher III, J. S., ...
The stellar initial mass function at high redshift is an important defining property of the first stellar systems to form and may also play a role in various dark matter problems. We here determine...
Abundances of RGB stars in NGC 6752 (2002)
Grundahl, F., Briley, M., Nissen, P. E., Feltzing, S.
Abundances of O, Fe, Al, Mg, Na and Li determined from high-resolutionand high signal-to-noise spectra of 21 red giant branch (RGB) stars inthe globular cluster NGC 6752 are presented. We demonstrate...
Using two epochs of HST/WFPC2 images of the metal-rich globular clusterNGC 6528 we derive the proper motions of the stars and use them toseparate the stars belonging to NGC 6528 from those of the...
Grundahl, F., Nissen, P. E., Briley, M., Feltzing, S.
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The Low-Mass IMF - Deep Star Counts in the DSph Galaxy Ursa Minor (Invited) (2002)
Feltzing, S., Wyse, R., Houdashelt, M., Gilmore, G.
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Abundances of RGB Stars in the Globular Cluster NGC 6752 (2001)
Briley, M. M., Grundahl, F., Nissen, P. E., Feltzing, S.
Abundances of O, Fe, Al, Mg, Na and Li determined from high-resolutionand high signal-to-noise VLT spectra from the atmospheric UV cutoff to6800Å of 21 red giant branch (RGB) stars in the globular...
The solar neighbourhood age-metallicity relation - Does it exist? (2001)
Feltzing, S., Holmberg, J., Hurley, J. R.
We derive stellar ages, from evolutionary tracks, and metallicities,from Strömgren photometry, for a sample of 5828 dwarf and sub-dwarfstars from the Hipparcos Catalogue. This stellar disk sample is...
Correction of errouneous zero-points and corresponding colour-magnitudediagram for NGC 6553. These changes have no implications for theconclusions drawn in Feltzing & Gilmore (2000).
We provide detailed abundance analyses of 8 candidate super-metal-richstars. Five of them are confirmed to have [Fe/H]>0.2 dex, thegenerally-accepted limit for super-metal-richness. Furthermore,...
Characterization of the Moving Group HR 1614 (CD-ROM Directory: contribs/holmberg) (2001)
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Chemical abundances in cool metal rich disk dwarf stars (2000)
The present study of spectra of twelve metal-rich cool dwarf stars, carefully selected in order to cover a range of temperatures (~4400 - 6000 K), is a follow up on Feltzing & Gustafsson (1998, A&AS...
Chemical abundances in cool metal rich disk dwarf stars (2000)
The present study of spectra of twelve metal-rich cool dwarf stars, carefully selected in order to cover a range of temperatures ( K), is a follow up on Feltzing & Gustafsson (1998) with the aim to...
We prove the existence of the old and metal-rich moving group HR 1614. This is done using the new Hipparcos parallaxes in combination with metallicities derived from Strömgren photometry, supported...
Age and metallicity gradients in the Galactic Bulge - A differential study using HST/WFPC2 (2000)
The Galactic Bulge has long been assumed to be a largely old stellar population. However, some recent studies based on observations with the HST WF/PC-1 and WFPC2 of stars in the Galactic Bulge have...
The Faint Optical Stellar Luminosity Function in the Ursa Minor Dwarf Spheroidal Galaxy (1999)
Feltzing, S., Gilmore, G., Wyse, R. F. G.
Analyses of their internal stellar kinematics imply that the dwarf spheroidal (dSph) companion galaxies to the Milky Way are among the most dark matter-dominated systems known. Should there be...
We have derived elemental abundances of O, Na, Mg, Al, Si, Ca, Ti, Cr, Mn, Fe, Co, Ni as well as for a number of s-elements for 47 G and K dwarf, with [Me/H]>0.1 dex. The selection of stars was based...
The production of beryllium in the early Galaxy (1994)
The formation of beryllium in the early Galaxy is discussed. It is shown that if spallation occurs predominantly in regions rich in heavy elements, i.e., close to supernovae, the linear relation...