The GALAH Survey: Chemically tagging the Fimbulthul stream to the globular cluster ω Centauri

@article{Simpson2019TheGS,
  title={The GALAH Survey: Chemically tagging the Fimbulthul stream to the globular cluster $\omega$ Centauri},
  author={Jeffrey D. Simpson and Sarah L. Martell and Gary S Da Costa and Jonathan Horner and Rosemary F. G. Wyse and Yuan-Sen Ting and Martin Asplund and Joss Bland-Hawthorn and Sven Buder and Gayandhi M De Silva and Kenneth C. Freeman and Janez Kos and Geraint F. Lewis and Karin Lind and Sanjib Sharma and Daniel B. Zucker and Toma{\vz} Zwitter and Klemen {\vC}otar and Peter L. Cottrell and Thomas Nordlander},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2019}
}
Using kinematics from Gaia and the large elemental abundance space of the second data release of the GALAH survey, we identify two new members of the Fimbulthul stellar stream, and chemically tag them to massive, multimetallic globular cluster ω Centauri. Recent analysis of the second data release of Gaia had revealed the Fimbulthul stellar stream in the halo of the Milky Way. It had been proposed that the stream is associated with the ω Cen, but this proposition relied exclusively upon the… 

Figures and Tables from this paper

The GALAH survey: accreted stars also inhabit the Spite plateau
The European Space Agency (ESA) Gaia mission has enabled the remarkable discovery that a large fraction of the stars near the solar neighbourhood are debris from a single in-falling system, the
A Chemo-dynamical Link between the Gjöll Stream and NGC 3201
Recent analysis of the second data release of Gaia has revealed a number of new stellar streams surrounding the Milky Way. It has been suggested that one of these streams, Gjöll, is associated with
The Most Metal-poor Stars in Omega Centauri (NGC 5139)
The most massive and complex globular clusters in the Galaxy are thought to have originated as the nuclear cores of now tidally disrupted dwarf galaxies, but the connection between globular clusters
R-process-rich Stellar Streams in the Milky Way
We present high-resolution Magellan/MIKE spectra of 22 bright (9 < V < 13.5) metal-poor stars (−3.18 < [Fe/H] < −1.37) in three different stellar streams, the Helmi debris stream, the Helmi trail
The Southern Stellar Stream Spectroscopic Survey (S5): Chemical Abundances of Seven Stellar Streams
We present high-resolution Magellan/MIKE spectroscopy of 42 red giant stars in seven stellar streams confirmed by the Southern Stellar Stream Spectroscopic Survey (S5): ATLAS, Aliqa Uma, Chenab,
S 5: The Destruction of a Bright Dwarf Galaxy as Revealed by the Chemistry of the Indus Stellar Stream
The recently discovered Indus stellar stream exhibits a diverse chemical signature compared to what is found for most other streams due to the abundances of two outlier stars, Indus_0 and Indus_13.
Detecting globular cluster tidal extensions with Bayesian inference – I. Analysis of ω Centauri with Gaia EDR3
The peripheral regions of globular clusters (GCs) are extremely challenging to study due to their low surface brightness nature and the dominance of Milky Way contaminant populations along their
The tidal tails of Milky Way globular clusters
We report on the search for overall kinematical or structural conditions that have allowed some Milky Way globular clusters to develop tidal tails. For this purpose, we built a comprehensive catalog
Jurassic: A chemically anomalous structure in the Galactic halo
Detailed elemental-abundance patterns of giant stars in the Galactic halo measured by the Apache Point Observatory Galactic Evolution Experiment (APOGEE-2) have revealed the existence of a unique and
Detection of a 100,000 M ⊙ black hole in M31's Most Massive Globular Cluster: A Tidally Stripped Nucleus
We investigate the presence of a central black hole (BH) in B023-G078, M31's most massive globular cluster. We present high-resolution, adaptive-optics assisted, integral-field spectroscopic
...
...

References

SHOWING 1-10 OF 98 REFERENCES
Identification of the long stellar stream of the prototypical massive globular cluster ω Centauri
Omega Centauri (ω Cen) is the Milky Way’s most massive globular cluster, and has long been suspected of being the remnant core of an accreted dwarf galaxy. If this scenario is correct, ω Cen should
The Streams of the Gaping Abyss: A Population of Entangled Stellar Streams Surrounding the Inner Galaxy
We present the discovery of a large population of stellar streams that surround the inner Galaxy, found in the Gaia DR2 catalog using the new STREAMFINDER algorithm. Here we focus on the properties
The GALAH survey: co-orbiting stars and chemical tagging
We present a study using the second data release of the GALAH survey of stellar parameters and elemental abundances of 15 pairs of stars identified by Oh et al 2017. They identified these pairs as
Discovery of new retrograde substructures: the shards of ω Centauri?
We use the Sloan Digital Sky Survey (SDSS)– Gaia catalogue to search for substructure in the stellar halo. The sample comprises 62 133 halo stars with full phase space coordinates and extends out to
The GALAH survey: observational overview and Gaia DR1 companion
The Galactic Archaeology with HERMES (GALAH) Survey is a massive observational project to trace the Milky Way's history of star formation, chemical enrichment, stellar migration and minor mergers.
SODIUM–OXYGEN ANTICORRELATION AND NEUTRON-CAPTURE ELEMENTS IN OMEGA CENTAURI STELLAR POPULATIONS
Omega Centauri is no longer the only globular cluster known to contain multiple stellar populations, yet it remains the most puzzling. Due to the extreme way in which the multiple stellar population
The GALAH survey: chemical tagging of star clusters and new members in the Pleiades
The technique of chemical tagging uses the elemental abundances of stellar atmospheres to 'reconstruct' chemically homogeneous star clusters that have long since dispersed. The GALAH spectroscopic
The Gaia-ESO Survey: A globular cluster escapee in the Galactic halo
A small fraction of the halo field is made up of stars that share the light element (Z <= 13) anomalies characteristic of second generation globular cluster (GC) stars. The ejected stars shed light
Identifying Sagittarius Stream Stars by Their APOGEE Chemical Abundance Signatures
The SDSS-IV Apache Point Observatory Galactic Evolution Experiment (APOGEE) survey provides precise chemical abundances of 18 chemical elements for ∼176,000 red giant stars distributed over much of
The GALAH Survey: Second Data Release
The Galactic Archaeology with HERMES (GALAH) survey is a large-scale stellar spectroscopic survey of theMilkyWay, designed to deliver complementary chemical information to a large number of stars
...
...