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17 papers · 2 filters
The evolution of the Oxygen abundance radial gradient in the Milky Way Galaxy disk
M. Mollá, O. Cavichia, R. D. D Costa +3
We review the state of our chemical evolution models for spiral and low mass galaxies. We analyze the consequences of using different stellar yields, infall rate laws and star form…
A Study of Quasar Selection in the Dark Energy Survey Supernova fields
S. S. Tie, P. Martini, D. Mudd +75
We present a study of quasar selection using the DES supernova fields. We used a quasar catalog from an overlapping portion of the SDSS Stripe 82 region to quantify the completenes…
Nearest Neighbor: The Low-Mass Milky Way Satellite Tucana III
J. D. Simon, T. S. Li, A. Drlica-Wagner +56
We present Magellan/IMACS spectroscopy of the recently discovered Milky Way satellite Tucana III (Tuc III). We identify 26 member stars in Tuc III, from which we measure a mean rad…
The dependence of oxygen and nitrogen abundances on stellar mass from the CALIFA survey
E. Pérez-Montero, R. García-Benito, J. M. Vílchez +20
We analysed the optical spectra of HII regions extracted from a sample of 350 galaxies of the CALIFA survey. We calculated total O/H abundances and, for the first time, N/O ratios…
The Dark Energy Survey view of the Sagittarius stream: discovery of two faint stellar system candidates
E. Luque, A. Pieres, B. Santiago +63
We report the discovery of two new candidate stellar systems in the constellation of Cetus using the data from the first two years of the Dark Energy Survey (DES). The objects, DES…
Properties of the outer regions of spiral disks: abundances, colors and ages
Mercedes Mollá, Angeles I. Díaz, Brad K. Gibson +2
We summarize the results obtained from our suite of chemical evolution models for spiral disks, computed for different total masses and star formation efficiencies. Once the gas, s…
Using the local gas-phase oxygen abundances to explore a metallicity-dependence in SNe Ia luminosities
M. E. Moreno-Raya, A. R. Lopez-Sanchez, M. Molla +3
We present an analysis of the gas-phase oxygen abundances of a sample of 28 galaxies in the local Universe (z < 0.02) hosting Type Ia Supernovae (SNe Ia). The data were obtained wi…
The role of gas infall in the evolution of disc galaxies
Mercedes Mollá, Ángeles I. Díaz, Brad K. Gibson +2
Spiral galaxies are thought to acquire their gas through a protracted infall phase resulting in the inside-out growth of their associated discs. For field spirals, this infall occu…
VDES J2325-5229 a z=2.7 gravitationally lensed quasar discovered using morphology independent supervised machine learning
Fernanda Ostrovski, Richard G. McMahon, Andrew J. Connolly +56
We present the discovery and preliminary characterization of a gravitationally lensed quasar with a source redshift and image separation of lensed by a foregrou…
Discovery of a z=0.65 Post-Starburst BAL Quasar in the DES Supernova Fields
Dale Mudd, Paul Martini, Suk Sien Tie +55
We present the discovery of a z=0.65 low-ionization broad absorption line (LoBAL) quasar in a post-starburst galaxy in data from the Dark Energy Survey (DES) and spectroscopy from…
Aperture effects on the oxygen abundance determinations from CALIFA data
J. Iglesias-Páramo, J. M. Vílchez, F. F. Rosales-Ortega +23
This paper aims at providing aperture corrections for emission lines in a sample of spiral galaxies from the Calar Alto Legacy Integral Field Area Survey (CALIFA) database. In part…
Nearby supernova host galaxies from the CALIFA Survey: II. SN environmental metallicity
L. Galbany, V. Stanishev, A. M. Mourão +16
The metallicity of a supernova (SN) progenitor, together with its mass, is one of the main parameters that rules their outcome. We present a metallicity study of 115 nearby SN host…
Galaxy Populations in Massive Galaxy Clusters to z=1.1: Color Distribution, Concentration, Halo Occupation Number and Red Sequence Fraction
C. Hennig, J. J. Mohr, A. Zenteno +70
We study the galaxy populations in 74 Sunyaev Zeldovich Effect (SZE) selected clusters from the South Pole Telescope (SPT) survey that have been imaged in the science verification…
CALIFA, the Calar Alto Legacy Integral Field Area survey: IV. Third Public data release
S. F. Sánchez, R. García-Benito, S. Zibetti +60
This paper describes the Third Public Data Release (DR3) of the Calar Alto Legacy Integral Field Area (CALIFA) survey. Science-grade quality data for 667 galaxies are made public,…
Star formation along the Hubble sequence: Radial structure of the star formation of CALIFA galaxies
R. M. González Delgado, R. Cid Fernandes, E. Pérez +21
The aim of this paper is to characterize the radial structure of the star formation rate (SFR) in galaxies in the nearby Universe as represented by the CALIFA survey. The sample un…
Shape of the oxygen abundance profiles in CALIFA face-on spiral galaxies
L. Sánchez-Menguiano, S. F. Sánchez, I. Pérez +25
We measured the gas abundance profiles in a sample of 122 face-on spiral galaxies observed by the CALIFA survey and included all spaxels whose line emission was consistent with sta…
Comparing Dark Energy Survey and HST-CLASH observations of the galaxy cluster RXC J2248.7-4431: implications for stellar mass versus dark matter
A. Palmese, O. Lahav, M. Banerji +65
We derive the stellar mass fraction in the galaxy cluster RXC J2248.7-4431 observed with the Dark Energy Survey (DES) during the Science Verification period. We compare the stellar…