Navegação Ciências Exatas e da Terra por Assunto "Dwarf galaxies"
Resultados 1-6 de 6
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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 ... -
Chemical abundance analysis of Tucana III, the second r-process enhanced ultra-faint dwarf galaxy
(2019) [Artigo de periódico]We present a chemical abundance analysis of four additional confirmed member stars of Tucana III, a Milky Way satellite galaxy candidate in the process of being tidally disrupted as it is accreted by the Galaxy. Two of ... -
MaNGA 8313-1901 : gas accretion observed in a blue compact dwarf galaxy
(2022) [Artigo de periódico]Gas accretion is an important process in the evolution of galaxies, but it has limited direct observational evidences. In this paper, we report the detection of a possible ongoing gas accretion event in a blue compact dwarf ... -
A search for faint resolved galaxies beyond the Milky Way in DES year 6 : a new faint, diffuse dwarf satellite of NGC 55
(2024) [Artigo de periódico]We report results from a systematic wide-area search for faint dwarf galaxies at heliocentric distances from 0.3 to 2 Mpc using the full 6 yr of data from the Dark Energy Survey (DES). Unlike previous searches over the DES ... -
The Curious Case of PHL 293B : a long-lived transient in a Metal-poor Blue Compact Dwarf Galaxy
(2020) [Artigo de periódico]We report on small-amplitude optical variability and recent dissipation of the unusually persistent broad emission lines in the blue compact dwarf galaxy PHL 293B. The galaxy's unusual spectral features (P Cygni-like ... -
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 ...