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4 papers · 2 filters
Machine-Learned Identification of RR Lyrae Stars from Sparse, Multi-band Data: the PS1 Sample
Branimir Sesar, Nina Hernitschek, Sandra Mitrović +16
RR Lyrae stars may be the best practical tracers of Galactic halo (sub-)structure and kinematics. The PanSTARRS1 (PS1) survey offers multi-band, multi-epoch, precise photometr…
A Synoptic Map of Halo Substructures from the Pan-STARRS1 3π Survey
Edouard J. Bernard, Annette M. N. Ferguson, Edward F. Schlafly +18
We present a panoramic map of the entire Milky Way halo north of dec~-30 degrees (~30,000 deg^2), constructed by applying the matched-filter technique to the Pan-STARRS1 3Pi Survey…
Young stars and ionized nebulae in M83: comparing chemical abundances at high metallicity
Fabio Bresolin, Rolf-Peter Kudritzki, Miguel A. Urbaneja +3
We present spectra of 14 A-type supergiants in the metal-rich spiral galaxy M83. We derive stellar parameters and metallicities, and measure a spectroscopic distance modulus m-M =…
A spectroscopic study of blue supergiant stars in the Sculptor galaxy NGC 55: chemical evolution and distance
Rolf Kudritzki, Miguel Urbaneja, Norberto Castro +5
Low resolution (4.5 to 5 Angstroem) spectra of 58 blue supergiant stars distributed over the disk of the Magellanic spiral galaxy NGC 55 in the Sculptor group are analyzed by means…