publication . Article . 2017

An r-process enhanced star in the dwarf galaxy Tucana III*

Romer, A K; The DES Collaboration,;
Open Access English
  • Published: 20 Mar 2017
  • Publisher: Institute of Physics
  • Country: United Kingdom
Abstract
Chemically peculiar stars in dwarf galaxies provide a window for exploring the birth environment of stars with varying chemical enrichment. We present a chemical abundance analysis of the brightest star in the newly discovered ultra-faint dwarf galaxy candidate Tucana III. Because it is particularly bright for a star in an ultra-faint Milky Way (MW) satellite, we are able to measure the abundance of 28 elements, including 13 neutron-capture species. This star, DES J235532.66−593114.9 (DES J235532), shows a mild enhancement in neutron-capture elements associated with the r-process and can be classified as an r-I star. DES J235532 is the first r-I star to be disco...
Subjects
arXiv: Astrophysics::Galaxy AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::Solar and Stellar AstrophysicsAstrophysics::Earth and Planetary Astrophysics
free text keywords: QB
Funded by
NSF| Collaborative Research: The Dark Energy Survey Data Management Operations
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 1138766
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Astronomical Sciences
,
EC| FN-COLLAGEN
Project
FN-COLLAGEN
Structural Studies on the Interaction of Fibronectin and Collagen
  • Funder: European Commission (EC)
  • Project Code: 235532
  • Funding stream: FP7 | SP3 | PEOPLE
,
EC| TESTDE
Project
TESTDE
Testing the Dark Energy Paradigm and Measuring Neutrino Mass with the Dark Energy Survey
  • Funder: European Commission (EC)
  • Project Code: 291329
  • Funding stream: FP7 | SP2 | ERC
,
EC| COGS
Project
COGS
Capitalizing on Gravitational Shear
  • Funder: European Commission (EC)
  • Project Code: 240672
  • Funding stream: FP7 | SP2 | ERC
,
EC| COSMICDAWN
Project
COSMICDAWN
Understanding the Origin of Cosmic Structure
  • Funder: European Commission (EC)
  • Project Code: 306478
  • Funding stream: FP7 | SP2 | ERC
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