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Journal Article

Precision Distances to Dwarf Galaxies and Globular Clusters from Pan-STARRS1 3π RR Lyrae

MPS-Authors

Hernitschek,  Nina
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Cohen,  Judith G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Rix,  Hans-Walter
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Magnier,  Eugene
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Metcalfe,  Nigel
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Wainscoat,  Richard
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Waters,  Christopher
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kudritzki,  Rolf-Peter
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Burgett,  William
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

External Resource

https://ui.adsabs.harvard.edu/abs/2019ApJ...871...49H
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Citation

Hernitschek, N., Cohen, J. G., Rix, H.-W., Magnier, E., Metcalfe, N., Wainscoat, R., et al. (2019). Precision Distances to Dwarf Galaxies and Globular Clusters from Pan-STARRS1 3π RR Lyrae. The Astrophysical Journal, 871.


Cite as: https://hdl.handle.net/21.11116/0000-0005-D0FA-6
Abstract
We present new spatial models and distance estimates for globular clusters and dwarf spheroidals orbiting our Galaxy based on RR Lyrae (RRab) stars in the Pan-STARRS1 (PS1) 3π survey. Using the PS1 sample of RRab stars from Sesar et al. in 16 globular clusters and 5 dwarf galaxies, we fit structural models in (l, b, D) space; for 13 globular clusters and 6 dwarf galaxies, we give only their mean heliocentric distance D. We verify the accuracy of the period-luminosity relations used in Sesar et al. to constrain the distance to those stars, and compare them to period-luminosity-metallicity relations using metallicities from Carretta et al. We compare our Sesar et al. distances to the parallax-based Gaia DR2 distance estimates from Bailer-Jones et al. and find our distances to be consistent and considerably more precise.