publication . Article . 2019

Chemical Abundance Analysis of Tucana III, the Second r-process Enhanced Ultra-faint Dwarf Galaxy

Marshall, J. L.; Hansen, T.; Simon, J. D.; Li, T. S.; Bernstein, R. A.; Kuehn, K.; Pace, A. B.; DePoy, D. L.; Palmese, A.; Pieres, A.; ...
Open Access English
  • Published: 10 Sep 2019
  • Publisher: IOP PUBLISHING LTD
  • Country: United Kingdom
Abstract
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 these stars are centrally located in the core of the galaxy while the other two stars are located in the eastern and western tidal tails. The four stars have chemical abundance patterns consistent with the one previously studied star in Tucana III: they are moderately enhanced in r-process elements, i.e., they have 〈[Eu/Fe]〉 ≈ +0.4 dex. The non-neutron-capture elements generally follow trends seen in other dwarf galaxies, including a metallicity r...
Subjects
arXiv: Astrophysics::Galaxy AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::Solar and Stellar AstrophysicsAstrophysics::Earth and Planetary Astrophysics
Funded by
NSF| Ancient History in the Local Group of Galaxies: The Milky Way's Faintest, Darkest, and Most Ancient Satellite Galaxies
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 1714873
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Astronomical Sciences
,
EC| COSMICDAWN
Project
COSMICDAWN
Understanding the Origin of Cosmic Structure
  • Funder: European Commission (EC)
  • Project Code: 306478
  • 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| 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
,
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
Download from
UCL Discovery
Article . 2019

Abbott, B. P., Abbott, R., Abbott, T. D., et al. 2017, ApJL, 848, L12 Asplund, M., Grevesse, N., Sauval, A. J., & Scott, P. 2009, ARA&A, 47, 481 Barklem, P. S., Christlieb, N., Beers, T. C., et al. 2005, A&A, 439, 129 Bechtol, K., Drlica-Wagner, A., Balbinot, E., et al. 2015, ApJ, 807, 50 Beers, T. C., & Christlieb, N. 2005, ARA&A, 43, 531 Bernstein, R., Shectman, S. A., Gunnels, S. M., et al. 2003, Proc. SPIE, 4841, 1694

Burbidge, E. M., Burbidge, G. R., Fowler, W. A., & Hoyle, F. 1957, RvMP, 29, 547

Burris, D. L., Pilachowski, C. A., Armandroff, T., et al. 2000, ApJ, 544, 302 Carretta, E., Bragaglia, A., Gratton, R., et al. 2007, A&A, 464, 967

Abstract
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 these stars are centrally located in the core of the galaxy while the other two stars are located in the eastern and western tidal tails. The four stars have chemical abundance patterns consistent with the one previously studied star in Tucana III: they are moderately enhanced in r-process elements, i.e., they have 〈[Eu/Fe]〉 ≈ +0.4 dex. The non-neutron-capture elements generally follow trends seen in other dwarf galaxies, including a metallicity r...
Subjects
arXiv: Astrophysics::Galaxy AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::Solar and Stellar AstrophysicsAstrophysics::Earth and Planetary Astrophysics
Funded by
NSF| Ancient History in the Local Group of Galaxies: The Milky Way's Faintest, Darkest, and Most Ancient Satellite Galaxies
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 1714873
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Astronomical Sciences
,
EC| COSMICDAWN
Project
COSMICDAWN
Understanding the Origin of Cosmic Structure
  • Funder: European Commission (EC)
  • Project Code: 306478
  • 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| 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
,
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
Download from
UCL Discovery
Article . 2019

Abbott, B. P., Abbott, R., Abbott, T. D., et al. 2017, ApJL, 848, L12 Asplund, M., Grevesse, N., Sauval, A. J., & Scott, P. 2009, ARA&A, 47, 481 Barklem, P. S., Christlieb, N., Beers, T. C., et al. 2005, A&A, 439, 129 Bechtol, K., Drlica-Wagner, A., Balbinot, E., et al. 2015, ApJ, 807, 50 Beers, T. C., & Christlieb, N. 2005, ARA&A, 43, 531 Bernstein, R., Shectman, S. A., Gunnels, S. M., et al. 2003, Proc. SPIE, 4841, 1694

Burbidge, E. M., Burbidge, G. R., Fowler, W. A., & Hoyle, F. 1957, RvMP, 29, 547

Burris, D. L., Pilachowski, C. A., Armandroff, T., et al. 2000, ApJ, 544, 302 Carretta, E., Bragaglia, A., Gratton, R., et al. 2007, A&A, 464, 967

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