6.9k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR336 papers
- ETH ZurichCH215 papers
- Petersburg Nuclear Physics InstituteRU204 papers
- Massachusetts Institute of TechnologyUS182 papers
- European Organization for Nuclear ResearchCH168 papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR167 papers
- University of GenevaCH163 papers
- Hungarian Academy of SciencesHU159 papers
- California Institute of TechnologyUS145 papers
- Paul Scherrer InstituteCH143 papers
- University of BolognaIT143 papers
- University of MichiganUS143 papers
38 papers · 2 filters
G515, Revisited. I. Stellar Populations And Evidence Of Nuclear Activity In A Luminous "E+A" Galaxy
Charles T. Liu, Eric J. Hooper, Karen O'Neil +3
We present multiwavelength observations of the very luminous "E+A" galaxy known as G515 (J152426.55+080906.7), including deep K_s imaging, spatially resolved H-alpha spectroscopy,…
Estimation of Galactic model parameters with the SDSS and metallicity distribution in two fields in the anti-centre direction of the Galaxy
S. Ak, S. Bilir, S. Karaali +1
We estimated the Galactic model parameters from the SDSS data reduced for two fields in the anti-centre direction of the Galaxy, , and symmetric relative to the Galacti…
Stellar kinematics and metallicities in the Leo I dwarf spheroidal galaxy -- wide field implications for galactic evolution
A. Koch, M. I. Wilkinson, J. T. Kleyna +5
We present low-resolution spectroscopy of 120 red giants in the Galactic satellite dwarf spheroidal (dSph) Leo I, obtained with the GeminiN-GMOS and Keck-DEIMOS spectrographs. We f…
Medium resolution spectroscopy in Omega Centauri: abundances of 400 subgiant and turn-off region
Andrea Kayser, Michael Hilker, Tom Richtler +1
Medium resolution spectra of more than 400 subgiant and turn-off region stars in Omega Centauri were analysed. The observations were performed at the VLT/Paranal with FORS2/MXU. In…
The RAVE Survey: Constraining the Local Galactic Escape Speed
M. C. Smith, G. R. Ruchti, A. Helmi +20
We report new constraints on the local escape speed of our Galaxy. Our analysis is based on a sample of high velocity stars from the RAVE survey and two previously published datase…
Evolution of the first stellar generations
R. Hirschi, A. Maeder, G. Meynet +2
Although the theoretical study of very low metallicity (Z) and metal-free stars is not new, their importance has recently greatly increased since two related fields have been devel…
Hot subdwarfs from the ESO Supernova Ia Progenitor Survey: II. Atmospheric parameters of subdwarf O stars
A. Stroeer, U. Heber, T. Lisker +4
We address the origin and evolutionary status of hot subdwarf stars by studying the optical spectral properties of 58 subdwarf O (sdO) stars. Combining them with the results of our…
Complexity on Small Scales II: Metallicities and Ages in the Leo II Dwarf Spheroidal Galaxy
A. Koch, E. K. Grebel, J. T. Kleyna +5
We present metallicities and ages for 52 red giants in the remote Galactic dwarf spheroidal (dSph) galaxy Leo II. These stars cover the entire surface area of Leo II and are radial…
Mass loss of rotating stars at very low metallicity
Georges Meynet, Andre Maeder, Raphael Hirschi +2
Some indirect observations, as the high fraction of Be stars at low metallicity, or the necessity for massive stars to be important sources of primary nitrogen, seem to indicate th…
Empirical Color Transformations Between SDSS Photometry and Other Photometric Systems
Katrin Jordi, Eva K. Grebel, Karin Ammon
We present empirical color transformations between the Sloan Digital Sky Survey (SDSS) ugriz photometry and Johnson-Cousins UBVRI system and Becker's RGU system, respectively. Owin…
Observed Properties of Dark Matter: dynamical studies of dSph galaxies
G Gilmore, M Wilkinson, J Kleyna +4
The Milky Way satellite dwarf spheroidal (dSph) galaxies are the smallest dark matter dominated systems in the universe. We have underway dynamical studies of the dSph to quantify…
Mass Distribution and Bulge Formation in the Milky Way Galaxy
Ortwin Gerhard
In its first part, this paper summarizes recent work on the mass and shape of the Galactic dark halo. The second part presents a review of the large-scale structure of the Milky Wa…
Just dust : About the (in)applicability of rotating dust solutions as realistic galaxy models
Tobias Zingg, Andreas Aste, Dirk Trautmann
Solutions of the stationary axisymmetric Einstein equations describing the interior of circularly rotating dust are investigated in order to study their potential applicability as…
Virgo cluster early-type dwarf galaxies with the Sloan Digital Sky Survey. II. Early-type dwarfs with central star formation
Thorsten Lisker, Katharina Glatt, Pieter Westera +1
Despite the common picture of an early-type dwarf (dE) as a quiescent galaxy with no star formation and little gas, we identify 23 dEs that have blue central colors caused by recen…
Very low metallicity massive star models: Pre-SN evolution and primary nitrogen production
Raphael Hirschi
Two series of models were computed. The first series consists of 20 solar mass models with varying initial metallicity (Z=0.02 down to Z=10^{-8}) and rotation (V_{ini}=0-600 km/s).…
The Tully-Fisher Relation and Its Residuals for a Broadly Selected Sample of Galaxies
James Pizagno, Francisco Prada, David H. Weinberg +7
We measure the relation between galaxy luminosity and disk circular velocity (the Tully-Fisher [TF] relation), in the g, r, i, and z-bands, for a broadly selected sample of galaxie…
A Curious New Milky Way Satellite in Ursa Major
D. B. Zucker, V. Belokurov, N. W. Evans +29
In this Letter, we study a localized stellar overdensity in the constellation of Ursa Major, first identified in Sloan Digital Sky Survey (SDSS) data and subsequently followed up w…
The Radial Velocity Experiment (RAVE): first data release
M. Steinmetz, T. Zwitter, A. Siebert +51
We present the first data release of the Radial Velocity Experiment (RAVE), an ambitious spectroscopic survey to measure radial velocities and stellar atmosphere parameters (temper…
Local Group(s)
Eva K. Grebel
The properties of the galaxies of the Local Group are reviewed, followed by a brief discussion of nearby groups. The galaxy groups in our vicinity - the M81 group, the Cen A group,…
On the geometrical evolution of the ionized gas in HII galaxies
F. Cuisinier, P. Westera, E. Telles +1
In this paper, we investigate the behaviour of the number of Lyman continuum ionizing photons as compared to the actual number of hydrogen recombinations in HII galaxies. We evalua…
A New Milky Way Dwarf Satellite in Canes Venatici
D. B. Zucker, V. Belokurov, N. W. Evans +30
In this Letter, we announce the discovery of a new dwarf satellite of the Milky Way, located in the constellation Canes Venatici. It was found as a stellar overdensity in the North…
Comment on "Heavy element production in inhomogeneous big bang nucleosynthesis"
T. Rauscher
The work of Matsuura et al. [Phys. Rev. D 72, 123505 (2005); astro-ph/0507439] claims that heavy nuclei could have been produced in a combined p- and r-process in very high baryon…
Comment on "187Re(gamma,n) cross section close to and above the neutron threshold"
T. Rauscher
The work of Müller et al. [Phys. Rev. C 73, 025804 (2006); astro-ph/0512603] provides interesting experimental data on neutron emission by photodisintegration of 187Re. However, th…
A Faint New Milky Way Satellite in Bootes
V. Belokurov, D. B. Zucker, N. W. Evans +30
In this Letter, we announce the discovery of a new satellite of the Milky Way in the constellation of Bootes at a distance of 60 kpc. It was found in a systematic search for stella…