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...
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...
A GLIMPSE into the Nature of Galactic Mid-IR Excesses (2008)
Uzpen, B., Kobulnicky, H. A., Semler, D. R., Bensby, T., Thom, C.
We investigate the nature of the mid-IR excess for 31 intermediate-mass stars that exhibit an 8 micron excess in either the Galactic Legacy Infrared Mid-Plane Survey Extraordinaire or the Mid-Course...
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...
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...
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...
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...
Oxygen in the Galactic Thin and Thick Disks (2003)
Bensby, T., Feltzing, S., Lundström, I.
Not Available
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...
The Distance Scale of Planetary Nebulae (2001)
By collecting distances from the literature, a set of 73 planetary nebulae with mean distances of high accuracy is derived. This sample is used for recalibration of the mass-radius relationship, used...
The distance scale of planetary nebulae (2001)
By collecting distances from the literature, a set of 73 planetarynebulae with mean distances of high accuracy is derived. This sample isused for recalibration of the mass-radius relationship, used...