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A new spectropolarimeter for the San Pedro Martir National Observatory

Published online by Cambridge University Press:  07 August 2014

E. Iñiguez-Garín ,
D. Hiriart ,
J. Ramirez-Velez ,
J. M. Núñez-Alfonso ,
J. Herrera  and
J. Castro-Chacón
E. Iñiguez-Garín
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Ensenada, B. C., México email: [email protected]
D. Hiriart
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Ensenada, B. C., México email: [email protected]
J. Ramirez-Velez
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Ensenada, B. C., México email: [email protected]
J. M. Núñez-Alfonso
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Ensenada, B. C., México email: [email protected]
J. Herrera
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Ensenada, B. C., México email: [email protected]
J. Castro-Chacón
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Ensenada, B. C., México email: [email protected]
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Abstract

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We present the design of a stellar spectropolarimeter to measure the magnetic field of point sources. The polarization module interfaces the Boller and Chivens (B&Ch) intermediate-low resolution (R ~ 500 − 4000) spectrograph to the 2.1-m telescope of the San Pedro Martir National Astronomical Observatory in Mexico. The module uses a Savart plate to split the beam into two orthogonal states of polarization and a quarter (half) waveplate to measure circular (linear) polarization. The module is mounted to the telescope and it feeds the spectrograph through a set of four fibers, two for the polarized star images and two for the spectrograph calibration lamp. The instrument will be capable of measuring polarization in spectral lines to determine the longitudinal and transversal fields in magnetic stars.

Keywords

Astronomical instrumentation: polarimetry – magnetic fields – stars: magnetic stars
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S302: Magnetic Fields throughout Stellar Evolution , August 2013 , pp. 154 - 155
Copyright
Copyright © International Astronomical Union 2014 

References

Hiriart, D., et al. 2011, Magnetic Stars. Proceedings of the International Conference, held in the Special Astrophysical Observatory of the Russian AS, August 27 – September 1, 2010, Eds: Romanyuk, I. I. and Kudryavtsev, D. O., p. 220–223Google Scholar
Kim, K.-M., et al. 2007, PASP, 119, 1052Google Scholar