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Using SONG to probe rapid variability and evolution of starspots

Published online by Cambridge University Press:  26 August 2011

James E. Neff ,
Jon Hakkila ,
Frank Hill ,
Jason Jackiewicz ,
Travis S. Metcalfe ,
Jørgen Christensen-Dalsgaard ,
Søren Frandsen ,
Frank Grundahl ,
Hans Kjeldsen  and
Uffe Gråe Jørgensen
...Show all authors
James E. Neff
Affiliation:
Dept. of Physics & Astronomy, College of Charleston, Charleston, SC 29424, USA email: neffj@cofc.edu High Altitude Observatory, NCAR, Boulder, CO 80307, USA
Jon Hakkila
Affiliation:
Dept. of Physics & Astronomy, College of Charleston, Charleston, SC 29424, USA email: neffj@cofc.edu
Frank Hill
Affiliation:
National Solar Observatory, Tucson, AZ, 85719, USA
Jason Jackiewicz
Affiliation:
Astronomy Dept., New Mexico State University, Las Cruces, NM 88003, USA
Travis S. Metcalfe
Affiliation:
High Altitude Observatory, NCAR, Boulder, CO 80307, USA
Jørgen Christensen-Dalsgaard
Affiliation:
High Altitude Observatory, NCAR, Boulder, CO 80307, USA Dept. of Physics & Astronomy, Aarhus University, Ny Munkegade, 8000 Aarhus C, Denmark
Søren Frandsen
Affiliation:
Dept. of Physics & Astronomy, Aarhus University, Ny Munkegade, 8000 Aarhus C, Denmark
Frank Grundahl
Affiliation:
Dept. of Physics & Astronomy, Aarhus University, Ny Munkegade, 8000 Aarhus C, Denmark
Hans Kjeldsen
Affiliation:
Dept. of Physics & Astronomy, Aarhus University, Ny Munkegade, 8000 Aarhus C, Denmark
Uffe Gråe Jørgensen
Affiliation:
Niels Bohr Institute, U. Copenhagen, Juliane Maries Vej 30, DK 2100 Copenhagen, Denmark
Per Kjærgaard Rasmussen
Affiliation:
Niels Bohr Institute, U. Copenhagen, Juliane Maries Vej 30, DK 2100 Copenhagen, Denmark
Sheng-Hong Gu
Affiliation:
Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming, China.
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Abstract

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The Stellar Observations Network Group (SONG) is being developed as a network of 1-meter spectroscopic telescopes designed for and primarily dedicated to asteroseismology. It is patterned after the highly successful GONG project. The Danish prototype telescope will be installed in Tenerife in early 2011. Ultimately we hope to have as many as 8 identical nodes providing continuous high-resolution spectroscopic observations for targets anywhere in the sky. The primary scientific goals of SONG are asteroseismology and the search for Earth-mass exoplanets. The spectroscopic requirements for these programs push the limits of current technology, but the resulting spectrograph design will enable many secondary science programs with less stringent requirements. Doppler imaging of starspots can be accomplished using continuous observations over several stellar rotations using identical instrumentation at each node. It should be possible to observe the evolution of starspot morphology in real-time, for example. We discuss the design and status of the SONG project in general, and we describe how SONG could be used to probe short timescale changes in stellar surface structure.

Keywords

Stars: spotsstars: oscillationsstars: magnetic fieldsstars: activityinstrumentation: spectrographs
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S273: The Physics of Sun and Star Spots , August 2010 , pp. 451 - 454
Copyright
Copyright © International Astronomical Union 2011

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