Navegação Ciências Exatas e da Terra por Assunto "Local group"
Resultados 1-13 de 13
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Birds of a Feather? : Magellan/IMACS spectroscopy of the ultra-faint satellites Grus II, Tucana IV, and Tucana V
(2020) [Artigo de periódico]We present Magellan/IMACS spectroscopy of three recently discovered ultra-faint Milky Way satellites, Grus II, Tucana IV, and Tucana V. We measure systemic velocities of vhel =- 110.0 0.5 - km s 1 , = - + vhel 15.9 1.7 ... -
Discovery of a stellar overdensity in Eridanus-Phoenix in the Dark Energy Survey
(2016) [Artigo de periódico]We report the discovery of an excess of main-sequence turnoff stars in the direction of the constellations of Eridanus and Phoenix from the first-year data of the Dark Energy Survey (DES). The Eridanus–Phoenix (EriPhe) ... -
Eight new Milky Way companions discovered in first-year Dark Energy Survey data
(2015) [Artigo de periódico]We report the discovery of eight new Milky Way companions in ~1800 deg2 of optical imaging data collected during the first year of the Dark Energy Survey (DES). Each system is identified as a statistically significant ... -
Eight ultra-faint galaxy candidates discovered in year two the Dark Energy Survey
(2015) [Artigo de periódico]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 detected at high confidence, while two ... -
Farthest neighbor : the distant Milky Way satellite Eridanus II
(2017) [Artigo de periódico]We present Magellan/IMACS spectroscopy of the recently discovered Milky Way satellite EridanusII (Eri II). We identify 28 member stars in EriII, from which we measure a systemic radial velocity of vhel = 75.6 1.3 (stat.) ... -
Nearest neighbor : the low-mass Milky Way satellite Tucana III
(2017) [Artigo de periódico]We present Magellan/IMACS spectroscopy of the recently discovered Milky Way satellite TucanaIII (Tuc III). We identify 26 member stars in TucIII from which we measure a mean radial velocity of vhel=−102.3±0.4 (stat.)±2.0(sys.) ... -
A new Milk Way halo star cluster in the southern galactic sky
(2013) [Artigo de periódico]We report on the discovery of a new Milky Way (MW) companion stellar system located at (αJ 2000, δJ 2000) = (22h10 m 43 s. 15,14º56'58".8). The discovery was made using the eighth data release of SDSS after applying an ... -
Search for gamma-ray emission from DES dwarf spheroidal galaxy candidates with Fermi-LAT data
(2015) [Artigo de periódico]Due to their proximity, high dark-matter (DM) content, and apparent absence of non-thermal processes, Milky Way dwarf spheroidal satellite galaxies (dSphs) are excellent targets for the indirect detection of DM. Recently, ... -
Stellar kinematics and metallicities in the ultra-faint dwarf galaxy Reticulum II
(2015) [Artigo de periódico]We present Magellan/M2FS, Very Large Telescope/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 selected from Dark Energy ... -
The DECam Local Volume Exploration Survey Data Release 2
(2022) [Artigo de periódico]We present the second public data release (DR2) from the DECam Local Volume Exploration survey (DELVE). DELVE DR2 combines new DECam observations with archival DECam data from the Dark Energy Survey, the DECam Legacy Survey, ... -
The first tidally disrupted ultra-faint dwarf galaxy? : a spectroscopic analysis of the Tucana III stream
(2018) [Artigo de periódico]We present a spectroscopic study of the tidal tails and core of the Milky Way satellite Tucana III, collectively referred to as the Tucana III stream, using the 2dF+AAOmega spectrograph on the Anglo-Australian Telescope ... -
The morphology and structure of stellar populations in the Fornax dwarf spheroidal galaxy from dark energy survey data
(2019) [Artigo de periódico]Using deep wide-field photometry 3 yr data (Y3) from the Dark Energy Survey (DES), we present a panoramic study of the Fornax dwarf spheroidal galaxy. The data presented here—a small subset of the full survey—uniformly ... -
Timing the r-process enrichment of the ultra-faint dwarf galaxy Reticulum II
(2023) [Artigo de periódico]The ultra-faint dwarf galaxy Reticulum II (Ret II) exhibits a unique chemical evolution history, with - + 72 12 10% of its stars strongly enhanced in r-process elements. We present deep Hubble Space Telescope photometry ...
