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The Araucaria Project: Precise and accurate distance determination to the LMC and SMC

Published online by Cambridge University Press:  25 February 2014

G. Pietrzyński ,
D. Graczyk ,
W. Gieren ,
I. Thompson ,
I. Soszyński ,
B. Pilecki ,
J. Storm ,
P. Konorski ,
K. Suchomska  and
A. Gallenne
...Show all authors
G. Pietrzyński
Affiliation:
Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland Departamento de Astronomia, Universidad de Concepcion, Casilla 160-C, Chile
D. Graczyk
Affiliation:
Departamento de Astronomia, Universidad de Concepcion, Casilla 160-C, Chile
W. Gieren
Affiliation:
Departamento de Astronomia, Universidad de Concepcion, Casilla 160-C, Chile
I. Thompson
Affiliation:
Carnegie Observatories, 813 Santa Barbara Street, Pasadena, CA, 911101-1292, USA
I. Soszyński
Affiliation:
Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
B. Pilecki
Affiliation:
Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland Departamento de Astronomia, Universidad de Concepcion, Casilla 160-C, Chile
J. Storm
Affiliation:
Leibniz-Institut fur Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482 Potsdam, Germany
P. Konorski
Affiliation:
Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
K. Suchomska
Affiliation:
Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
A. Gallenne
Affiliation:
Departamento de Astronomia, Universidad de Concepcion, Casilla 160-C, Chile
N. Nardetto
Affiliation:
Departamento de Astronomia, Universidad de Concepcion, Casilla 160-C, Chile
P. Karczmarek
Affiliation:
Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
M. Gorski
Affiliation:
Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
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Abstract

We present distance determinations to the LMC and SMC based on long period eclipsing binary systems composed of giants. Our LMC distance provides the best zero point for the whole extragalactic distance scale, while the precise relative distance between the LMC and SMC offers unique opportunity to study populational effects on the stellar distance indicators. Apart from distances, analysis of these systems allowed us to measure with a very good accuracy basic stellar parameters (1–2% radii, masses, effective temperature, etc.) of relatively large sample of giants. This catalog provides unique opportunity to calibrate evolutionary models of giant stars.

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References

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