output
19912026
Showing 2015 · astro-ph.GAShow all

21 papers · 2 filters

astro-ph.GA2015★ 29 cited

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…

astro-ph.GA2015★ 114 cited

Non-universal star formation efficiency in turbulent ISM

Vadim A. Semenov, Andrey V. Kravtsov, Nickolay Y. Gnedin

We present a study of a star formation prescription in which star formation efficiency depends on local gas density and turbulent velocity dispersion, as suggested by direct simula…

astro-ph.GA2015★ 5 cited

Globular and Open Clusters Observed by SDSS/SEGUE: the Giant Stars

Heather L. Morrison, Zhibo Ma, James L. Clem +10

We present griz observations for the clusters M92, M13 and NGC 6791 and gr photometry for M71, Be 29 and NGC 7789. In addition we present new membership identifications for all the…

astro-ph.GA2015★ 42 cited

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…

astro-ph.GA2015★ 54 cited

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…

astro-ph.GA2015★ 98 cited

Star-Forming Brightest Cluster Galaxies at 0.25 < z < 1.25: A Transitioning Fuel Supply

M. McDonald, B. Stalder, M. Bayliss +23

We present a multi-wavelength study of 90 brightest cluster galaxies (BCGs) in a sample of galaxy clusters selected via the Sunyaev Zel'dovich effect by the South Pole Telescope, u…

astro-ph.GA2015★ 83 cited

Deep Chandra, HST-COS, and Megacam Observations of the Phoenix Cluster: Extreme Star Formation and AGN Feedback on Hundred Kiloparsec Scales

M. McDonald, B. R. McNamara, R. J. van Weeren +17

We present new ultraviolet, optical, and X-ray data on the Phoenix galaxy cluster (SPT-CLJ2344-4243). Deep optical imaging reveals previously-undetected filaments of star formation…

astro-ph.GA2015★ 60 cited

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…

astro-ph.GA2015★ 47 cited

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…

astro-ph.GA2015★ 534 cited

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…

astro-ph.GA2015★ 97 cited

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…

astro-ph.GA2015★ 42 cited

Estimation of distances to stars with stellar parameters from LAMOST

Jeffrey L. Carlin, Chao Liu, Heidi Jo Newberg +15

We present a method to estimate distances to stars with spectroscopically derived stellar parameters. The technique is a Bayesian approach with likelihood estimated via comparison…

astro-ph.GA2015

Characteristics of He II Proximity Profiles

W. Zheng, D. Syphers, A. Meiksin +4

The proximity profile in the spectra of z~3 quasars, where fluxes extend blueward of the He II Lya wavelength 304 (1+z) A, is one of the most important spectral features in the stu…

astro-ph.GA2015★ 107 cited

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…

astro-ph.GA2015★ 76 cited

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…

astro-ph.GA2015★ 54 cited

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…

astro-ph.GA2015★ 162 cited

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…

astro-ph.GA2015★ 576 cited

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…

astro-ph.GA2015★ 239 cited

Rings and Radial Waves in the Disk of the Milky Way

Yan Xu, Heidi Jo Newberg, Jeffrey L. Carlin +5

We show that in the anticenter region, between Galactic longitudes of , there is an oscillating asymmetry in the main sequence star counts on either side of…

astro-ph.GA2015★ 51 cited

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…

astro-ph.GA2015★ 170 cited

The nature of the [CII] emission in dusty star-forming galaxies from the SPT survey

Bitten Gullberg, Carlos De Breuck, Joaquin Vieira +24

We present [CII] observations of 20 strongly lensed dusty star forming galaxies at 2.1 < z < 5.7 using APEX and Herschel. The sources were selected on their 1.4 mm flux (S_1.4mm >…