The Pristine Inner Galaxy Survey (PIGS) III: carbon-enhanced metal-poor stars in the bulge

@inproceedings{Arentsen2021ThePI,
title={The Pristine Inner Galaxy Survey (PIGS) III: carbon-enhanced metal-poor stars in the bulge},
author={Anke Arentsen and Else Starkenburg and David S. Aguado and Nicolas F. Martin and Vinicius M. Placco and Raymond G. Carlberg and Jonay I Gonz{\'a}lez Hern{\'a}ndez and Vanessa Hill and Pascale Jablonka and Georges Kordopatis and Carmela Lardo and Lyudmila I Mashonkina and Julio F. Navarro and Kim A Venn and Sven Buder and Geraint F. Lewis and Zhen Wan and Daniel B. Zucker},
year={2021}
}
The most metal-deficient stars hold important clues about the early build-up and chemical evolution of the Milky Way, and carbon-enhanced metal-poor (CEMP) stars are of special interest. However, little is known about CEMP stars in the Galactic bulge. In this paper, we use the large spectroscopic sample of metal-poor stars from the Pristine Inner Galaxy Survey (PIGS) to identify CEMP stars ([C/Fe] > +0.7) in the bulge region and to derive a CEMP fraction. We identify 96 new CEMP stars in the… Expand

References

SHOWING 1-10 OF 122 REFERENCES
Chemistry of the Most Metal-poor Stars in the Bulge and the z > 10 Universe
• Physics
• 2015
Metal-poor stars in the Milky Way are local relics of the epoch of the first stars and the first galaxies. However, a low metallicity does not prove that a star formed in this ancient era, asExpand
VERY METAL-POOR STARS IN THE OUTER GALACTIC BULGE FOUND BY THE APOGEE SURVEY
Despite its importance for understanding the nature of early stellar generations and for constraining Galactic bulge formation models, at present little is known about the metal-poor stellar contentExpand
The Gaia-ESO Survey: the most metal-poor stars in the Galactic bulge
We present the first results of the EMBLA survey (Extremely Metal-poor BuLge stars with AAOmega), aimed at finding metal-poor stars in the Milky Way bulge, where the oldest stars should nowExpand
The COMBS survey – I. Chemical origins of metal-poor stars in the Galactic bulge
• M. Lucey, +7 authors A. Marino
• Physics
• Monthly Notices of the Royal Astronomical Society
• 2019
Chemistry and kinematic studies can determine the origins of stellar population across the Milky Way. The metallicity distribution function of the bulge indicates that it comprises multipleExpand
Carbon-enhanced metal-poor stars in dwarf galaxies
• Physics
• 2015
We investigate the frequency and origin of carbon-enhanced metal-poor (CEMP) stars in Local Group dwarf galaxies by means of a statistical, data-calibrated cosmological model for the hierarchicalExpand
Metal-poor stars towards the Galactic bulge - a population potpourri
• Physics
• 2015
We present a comprehensive chemical abundance analysis of five red giants and two horizontal branch (HB) stars towards the southern Galactic bulge, at (l,b)$\sim$(0$^{\rm o}$,-11$^{\rm o}$). Based onExpand
The EMBLA survey – metal-poor stars in the Galactic bulge
Cosmological models predict the oldest stars in the Galaxy should be found closest to the centre of the potential well, in the bulge. The Extremely Metal-poor BuLge stars with AAOmega survey (EMBLA)Expand
The first carbon-enhanced metal-poor star found in the Sculptor dwarf spheroidal
The origin of carbon-enhanced metal-poor (CEMP) stars and their possible connection with the chemical elements produced by the first stellar generation is still highly debated. In contrast to theExpand
Extremely metal-poor stars from the cosmic dawn in the bulge of the Milky Way
Observations of extremely metal-poor stars in the Milky Way bulge are reported, including one star with an iron abundance about 10,000 times lower than the solar value without noticeable carbon enhancement. Expand
TOPoS - II. On the bimodality of carbon abundance in CEMP stars Implications on the early chemical evolution of galaxies
Context. In the course of the TOPoS (Turn Off Primordial Stars) survey, aimed at discovering the lowest metallicity stars, we have found several carbon-enhanced metal-poor (CEMP) stars. These starsExpand