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The metallicity and distance of Leo A from blue supergiants
Miguel A. Urbaneja, Fabio Bresolin, Rolf-Peter Kudritzki
We have obtained high-quality spectra of blue supergiant candidates in the dwarf irregular galaxy Leo A with the Low Resolution Imaging Spectrometer at the Keck I telescope. From t…
The metallicity and distance of NGC 2403 from blue supergiants
Fabio Bresolin, Rolf-Peter Kudritzki, Miguel A. Urbaneja
We present the first quantitative spectral analysis of blue supergiant stars in the nearby galaxy NGC 2403. Out of a sample of 47 targets observed with the LRIS spectrograph at the…
A spectroscopic study of blue supergiant stars in Local Group spiral galaxies: Andromeda and Triangulum
Cheng Liu, Rolf-Peter Kudritzki, Gang Zhao +4
Low-resolution LAMOST and Keck spectra of blue supergiant stars distributed over the disks of the Local Group spiral galaxies M 31 and M 33 are analyzed to determine stellar effect…
MUSE crowded field 3D spectroscopy in NGC 300 II. Quantitative spectroscopy of BA-type supergiants
Gemma González-Torà, Miguel A. Urbaneja, Norbert Przybilla +4
A quantitative spectral analysis of BA-type supergiants and bright giants in an inner spiral arm region of the nearby spiral galaxy NGC 300 is presented, based on observations with…
Modified Gravity and the Flux-weighted Gravity-Luminosity Relationship of Blue Supergiant Stars
Eva Sextl, Rolf-Peter Kudritzki, Jochen Weller +2
We calculate models of stellar evolution for very massive stars and include the effects of modified gravity to investigate the influence on the physical properties of blue supergia…
Quantitative Spectroscopy of Supergiants in the Local Group Dwarf Galaxy IC 1613: Metallicity and Distance
Travis A. Berger, Rolf-Peter Kudritzki, Miguel A. Urbaneja +4
We present the spectral analysis of 21 blue supergiant stars of spectral type late B to early A within the Local Group dwarf galaxy IC 1613 based on VLT-FORS2 low resolution spectr…