Pith. sign in

REVIEW

Chemical Analysis of the Brightest Star of the Cetus II Ultra-Faint Dwarf Galaxy Candidate

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 2310.12090 v1 pith:5PNZ26W6 submitted 2023-10-18 astro-ph.GA astro-ph.SR

Chemical Analysis of the Brightest Star of the Cetus II Ultra-Faint Dwarf Galaxy Candidate

K. B. Webber , T. T. Hansen , J. L. Marshall , J. D. Simon , A. B. Pace , B. Mutlu-Pakdil , A. Drlica-Wagner , C. E. Mart\'Inez-V\'Azquez
show 37 more authors
M. Aguena S. S. Allam O. Alves E. Bertin D. Brooks A. Carnero Rosell J. Carretero L. N. Da Costa J. De Vicente P. Doel I. Ferrero D. Friedel J. Frieman J. Garc\'Ia-Bellido G. Giannini D. Gruen R. A. Gruendl S. R. Hinton D. L. Hollowood K. Honscheid K. Kuehn J. Mena-Fern\'Andez F. Menanteau R. Miquel R. L. C. Ogando M. E. S. Pereira A. Pieres A. A. Plazas Malag\'On E. Sanchez B. Santiago J. Allyn Smith M. Smith E. Suchyta G. Tarle C. To N. Weaverdyck B. Yanny
This is my paper
classification astro-ph.GA astro-ph.SR
keywords starabundancesstarsgalaxycetuschemicalabundanceanalysis
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
0 comments
Share X Bluesky LinkedIn Reddit HN
read the original abstract

We present a detailed chemical abundance analysis of the brightest star in the ultra-faint dwarf (UFD) galaxy candidate Cetus II from high-resolution Magellan/MIKE spectra. For this star, DES J011740.53-173053, abundances or upper limits of 18 elements from Carbon to Europium are derived. Its chemical abundances generally follow those of other UFD galaxy stars, with a slight enhancement of the alpha-elements (Mg, Si, and Ca) and low neutron-capture element (Sr, Ba, Eu) abundances supporting the classification of Cetus II as a likely UFD. The star exhibits lower Sc, Ti, and V abundances than Milky Way (MW) halo stars with similar metallicity. This signature is consistent with yields from a supernova (SN) originating from a star with a mass of ~11.2 solar masses. In addition, the star has a Potassium abundance of [K/Fe] = 0.81 which is somewhat higher than the K abundances of MW halo stars with similar metallicity, a signature which is also present in a number of UFD galaxies. A comparison including globular clusters (GC) and stellar stream stars suggests that high K is a specific characteristic for some UFD galaxy stars and can thus be used to help classify objects as UFD galaxies.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.