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22 papers · 2 filters
Physical properties of star clusters in the outer LMC as observed by the Dark Energy Survey
A. Pieres, B. Santiago, E. Balbinot +57
The Large Magellanic Cloud (LMC) harbors a rich and diverse system of star clusters, whose ages, chemical abundances, and positions provide information about the LMC history of sta…
Very-high-energy gamma-rays from the Universe's middle age: detection of the z=0.940 blazar PKS 1441+25 with MAGIC
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +246
The flat-spectrum radio quasar PKS 1441+25 at a redshift of z = 0.940 is detected between 40 and 250 GeV with a significance of 25.5 σ using the MAGIC telescopes. Together with the…
On the dependence of the type Ia SNe luminosities on the metallicity of their host galaxies
Manuel E. Moreno-Raya, Mercedes Mollá, Ángel R. López-Sánchez +4
The metallicity of the progenitor system producing a type Ia supernova (SN Ia) could play a role in its maximum luminosity, as suggested by theoretical predictions. We present an o…
The warm ionized gas in CALIFA early-type galaxies: 2D emission-line patterns and kinematics for 32 galaxies
J. M. Gomes, P. Papaderos, C. Kehrig +23
The morphological, spectroscopic and kinematical properties of the warm interstellar medium (wim) in early-type galaxies (ETGs) hold key observational constraints to nuclear activi…
Spectroscopic aperture biases in inside-out evolving early-type galaxies from CALIFA
J. M. Gomes, P. Papaderos, J. M. Vílchez +21
Integral field spectroscopy studies based on CALIFA data have recently revealed the presence of ongoing low-level star formation (SF) in the periphery of ~10% of local early-type g…
Spiral-like star-forming patterns in CALIFA early-type galaxies
J. M. Gomes, P. Papaderos, J. M. Vílchez +21
Based on a combined analysis of SDSS imaging and CALIFA integral field spectroscopy data, we report on the detection of faint (24 < μ mag/arcsec < 26) star-forming spiral-a…
Outer-disk reddening and gas-phase metallicities: The CALIFA connection
R. A. Marino, A. Gil de Paz, S. F. Sánchez +27
We study, for the first time in a statistically significant and well-defined sample, the relation between the outer-disk ionized-gas metallicity gradients and the presence of break…
Discovery of a Stellar Overdensity in Eridanus-Phoenix in the Dark Energy Survey
T. S. Li, E. Balbinot, N. Mondrik +56
We report the discovery of an excess of main sequence turn-off stars in the direction of the constellations of Eridanus and Phoenix from the first year data of the Dark Energy Surv…
The Phoenix stream: a cold stream in the Southern hemisphere
E. Balbinot, B. Yanny, T. S. Li +49
We report the discovery of a stellar stream in the Dark Energy Survey (DES) Year 1 (Y1A1) data. The discovery was made through simple color-magnitude filters and visual inspection…
Digging deeper into the Southern skies: a compact Milky-Way companion discovered in first-year Dark Energy Survey data
E. Luque, A. Queiroz, B. Santiago +61
The Dark Energy Survey (DES) is a 5000 sq. degree survey in the southern hemisphere, which is rapidly reducing the existing north-south asymmetry in the census of MW satellites and…
Discovery of two gravitationally lensed quasars in the Dark Energy Survey
Adriano Agnello, Tommaso Treu, Fernanda Ostrovski +77
We present spectroscopic confirmation of two new lensed quasars via data obtained at the 6.5m Magellan/Baade Telescope. The lens candidates have been selected from the Dark Energy…
Eight Ultra-faint Galaxy Candidates Discovered in Year Two of the Dark Energy Survey
The DES Collaboration, A. Drlica-Wagner, K. Bechtol +74
We report the discovery of eight new ultra-faint dwarf galaxy candidates in the second year of optical imaging data from the Dark Energy Survey (DES). Six of these candidates are d…
No galaxy left behind: accurate measurements with the faintest objects in the Dark Energy Survey
E. Suchyta, E. M. Huff, J. Aleksić +72
Accurate statistical measurement with large imaging surveys has traditionally required throwing away a sizable fraction of the data. This is because most measurements have have rel…
The CALIFA survey across the Hubble sequence: Spatially resolved stellar population properties in galaxies
R. M. González Delgado, R. García-Benito, E. Pérez +32
This paper characterizes the radial structure of stellar population properties of galaxies in the nearby universe, based on 300 galaxies from the CALIFA survey. The sample covers a…
Galactic Chemical Evolution: Stellar Yields and the Initial Mass Function
Mercedes Mollá, Oscar Cavichia, Marta Gavilán +1
We present a set of 144 galactic chemical evolution models applied to a Milky Way analogue, computed using four sets of low and intermediate star nucleosynthetic yields, six massiv…
MAGIC detection of short-term variability of the high-peaked BL Lac object 1ES 0806+524
MAGIC Collaboration, J. Aleksić, S. Ansoldi +152
The high-frequency-peaked BL Lac (HBL) 1ES 0806+524 (z = 0.138) was discovered in VHE rays in 2008. Until now, the broad-band spectrum of 1ES 0806+524 has been only poorly char…
OzDES multi-fibre spectroscopy for the Dark Energy Survey: first-year operation and results
Fang Yuan, C. Lidman, T. M. Davis +99
OzDES is a five-year, 100-night, spectroscopic survey on the Anglo-Australian Telescope, whose primary aim is to measure redshifts of approximately 2,500 Type Ia supernovae host ga…
DES J0454-4448: Discovery of the First Luminous z > 6 Quasar from the Dark Energy Survey
S. L. Reed, R. G. McMahon, M. Banerji +59
We present the first results of a survey for high redshift, z 6, quasars using izY multi-colour photometric observations from the Dark Energy Survey (DES). Here we report the…
Galaxies in X-ray Selected Clusters and Groups in Dark Energy Survey Data I: Stellar Mass Growth of Bright Central Galaxies Since z~1.2
Y. Zhang, C. Miller, T. Mckay +80
Using the science verification data of the Dark Energy Survey (DES) for a new sample of 106 X-Ray selected clusters and groups, we study the stellar mass growth of Bright Central G…
Stellar Kinematics and Metallicities in the Ultra-Faint Dwarf Galaxy Reticulum II
J. D. Simon, A. Drlica-Wagner, T. S. Li +69
We present Magellan/M2FS, VLT/GIRAFFE, and Gemini South/GMOS spectroscopy of the newly discovered Milky Way satellite Reticulum II. Based on the spectra of 25 Ret II member stars s…
Eight New Milky Way Companions Discovered in First-Year Dark Energy Survey Data
The DES Collaboration, K. Bechtol, A. Drlica-Wagner +91
We report the discovery of eight new Milky Way companions in ~1,800 deg^2 of optical imaging data collected during the first year of the Dark Energy Survey (DES). Each system is id…
The LMC geometry and outer stellar populations from early DES data
Eduardo Balbinot, B. X. Santiago, L. Girardi +50
The Dark Energy Camera has captured a large set of images as part of Science Verification (SV) for the Dark Energy Survey. The SV footprint covers a lar ge portion of the outer Lar…