Gaia RR Lyrae Stars in Nearby Ultra-Faint Dwarf Satellite Galaxies

A. Katherina Vivas; Alistair Walker (CTIO; Clara Mart\'inez-V\'azquez; NSF's National Optical-Infrared Astronomy Research Laboratory)

Gaia RR Lyrae Stars in Nearby Ultra-Faint Dwarf Satellite Galaxies

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 2001.01107 v1 pith:CM63J75C submitted 2020-01-04 astro-ph.GA

Gaia RR Lyrae Stars in Nearby Ultra-Faint Dwarf Satellite Galaxies

A. Katherina Vivas , Clara Mart\'inez-V\'azquez , Alistair Walker (CTIO , NSF's National Optical-Infrared Astronomy Research Laboratory) This is my paper

classification astro-ph.GA

keywords starslyraegalaxiesgaiadwarfbootesidentifiednearby

verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved

0 comments

read the original abstract

We search for RR Lyrae stars in 27 nearby ($<100$ kpc) ultra-faint dwarf satellite galaxies using the Gaia DR2 catalog of RR Lyrae stars. Based on proper motions, magnitudes and location on the sky, we associate 47 Gaia RR Lyrae stars to 14 different satellites. Distances based on RR Lyrae stars are provided for those galaxies. We have identified RR Lyrae stars for the first time in the Tucana II dwarf galaxy, and find additional members in Ursa Major II, Coma Berenices, Hydrus I, Bootes I and Bootes III. In addition we have identified candidate extra-tidal RR Lyrae stars in six galaxies which suggest they may be undergoing tidal disruption. We found 10 galaxies have no RR Lyrae stars neither in Gaia nor in the literature. However, given the known completeness of Gaia DR2 we cannot conclude these galaxies indeed lack variable stars of this type.

discussion (0)

Forward citations

Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

Improving reddening estimates for RR Lyrae stars in the Gaia bands: a machine learning approach to the PAC(Z) relation
astro-ph.SR 2026-07 conditional novelty 6.0

New SFS-based linear relations predict Gaia intrinsic colors of RRab and RRc RR Lyrae from period, amplitude, and metallicity, yielding reddening and AG estimates that are cross-checked on clusters and dwarf galaxies.