%0 Generic %1 chaplin2013kepler %A Chaplin, W. J %A Kjeldsen, H. %A Christensen-Dalsgaard, J. %A Gilliland, R. L. %A Kawaler, S. D. %A Basu, S. %A De Ridder, J. %A Huber, D. %A Arentoft, T. %A Schou, J. %A Garcia, R. A. %A Metcalfe, T. S. %A Brogaard, K. %A Campante, T. L. %A Elsworth, Y. %A Miglio, A. %A Appourchaux, T. %A Bedding, T. R. %A Hekker, S. %A Houdek, G. %A Karoff, C. %A Molenda-Zakowicz, J. %A Monteiro, M. J. P. F. G. %A Aguirre, V. Silva %A Stello, D. %A Ball, W. %A Beck, P. G. %A Birch, A. C. %A Buzasi, D. L. %A Casagrande, L. %A Cellier, T. %A Corsaro, E. %A Creevey, O. L. %A Davies, G. R. %A Deheuvels, S. %A Dogan, G. %A Gizon, L. %A Grundahl, F. %A Guzik, J. %A Handberg, R. %A Jimenez, A. %A Kallinger, T. %A Lund, M. N. %A Lundkvist, M. %A Mathis, S. %A Mathur, S. %A Mazumdar, A. %A Mosser, B. %A Neiner, C. %A Nielsen, M. B. %A Palle, P. L. %A Pinsonneault, M. H. %A Salabert, D. %A Serenelli, A. M. %A Shunker, H. %A White, T. R. %D 2013 %K 2013 kepler proposal %T Kepler White Paper: Asteroseismology of Solar-Like Oscillators in a 2-Wheel Mission %U http://arxiv.org/abs/1309.0702 %X We comment on the potential for continuing asteroseismology of solar-type and red-giant stars in a 2-wheel Kepler Mission. Our main conclusion is that by targeting stars in the ecliptic it should be possible to perform high-quality asteroseismology, as long as favorable scenarios for 2-wheel pointing performance are met. Targeting the ecliptic would potentially facilitate unique science that was not possible in the nominal Mission, notably from the study of clusters that are significantly brighter than those in the Kepler field. Our conclusions are based on predictions of 2-wheel observations made by a space photometry simulator, with information provided by the Kepler Project used as input to describe the degraded pointing scenarios. We find that elevated levels of frequency-dependent noise, consistent with the above scenarios, would have a significant negative impact on our ability to continue asteroseismic studies of solar-like oscillators in the Kepler field. However, the situation may be much more optimistic for observations in the ecliptic, provided that pointing resets of the spacecraft during regular desaturations of the two functioning reaction wheels are accurate at the < 1 arcsec level. This would make it possible to apply a post-hoc analysis that would recover most of the lost photometric precision. Without this post-hoc correction---and the accurate re-pointing it requires---the performance would probably be as poor as in the Kepler-field case. Critical to our conclusions for both fields is the assumed level of pointing noise (in the short-term jitter and the longer-term drift). We suggest that further tests will be needed to clarify our results once more detail and data on the expected pointing performance becomes available, and we offer our assistance in this work.

@misc{chaplin2013kepler, abstract = {We comment on the potential for continuing asteroseismology of solar-type and red-giant stars in a 2-wheel Kepler Mission. Our main conclusion is that by targeting stars in the ecliptic it should be possible to perform high-quality asteroseismology, as long as favorable scenarios for 2-wheel pointing performance are met. Targeting the ecliptic would potentially facilitate unique science that was not possible in the nominal Mission, notably from the study of clusters that are significantly brighter than those in the Kepler field. Our conclusions are based on predictions of 2-wheel observations made by a space photometry simulator, with information provided by the Kepler Project used as input to describe the degraded pointing scenarios. We find that elevated levels of frequency-dependent noise, consistent with the above scenarios, would have a significant negative impact on our ability to continue asteroseismic studies of solar-like oscillators in the Kepler field. However, the situation may be much more optimistic for observations in the ecliptic, provided that pointing resets of the spacecraft during regular desaturations of the two functioning reaction wheels are accurate at the < 1 arcsec level. This would make it possible to apply a post-hoc analysis that would recover most of the lost photometric precision. Without this post-hoc correction---and the accurate re-pointing it requires---the performance would probably be as poor as in the Kepler-field case. Critical to our conclusions for both fields is the assumed level of pointing noise (in the short-term jitter and the longer-term drift). We suggest that further tests will be needed to clarify our results once more detail and data on the expected pointing performance becomes available, and we offer our assistance in this work.}, added-at = {2013-09-04T16:03:22.000+0200}, author = {Chaplin, W. J and Kjeldsen, H. and Christensen-Dalsgaard, J. and Gilliland, R. L. and Kawaler, S. D. and Basu, S. and De Ridder, J. and Huber, D. and Arentoft, T. and Schou, J. and Garcia, R. A. and Metcalfe, T. S. and Brogaard, K. and Campante, T. L. and Elsworth, Y. and Miglio, A. and Appourchaux, T. and Bedding, T. R. and Hekker, S. and Houdek, G. and Karoff, C. and Molenda-Zakowicz, J. and Monteiro, M. J. P. F. G. and Aguirre, V. Silva and Stello, D. and Ball, W. and Beck, P. G. and Birch, A. C. and Buzasi, D. L. and Casagrande, L. and Cellier, T. and Corsaro, E. and Creevey, O. L. and Davies, G. R. and Deheuvels, S. and Dogan, G. and Gizon, L. and Grundahl, F. and Guzik, J. and Handberg, R. and Jimenez, A. and Kallinger, T. and Lund, M. N. and Lundkvist, M. and Mathis, S. and Mathur, S. and Mazumdar, A. and Mosser, B. and Neiner, C. and Nielsen, M. B. and Palle, P. L. and Pinsonneault, M. H. and Salabert, D. and Serenelli, A. M. and Shunker, H. and White, T. R.}, biburl = {https://www.bibsonomy.org/bibtex/2cc20b952aa025cdb4174f726d5e015bd/danielcarrera}, description = {[1309.0702] Kepler White Paper: Asteroseismology of Solar-Like Oscillators in a 2-Wheel Mission}, interhash = {06841246e5949c61e0a499f5a361d8e2}, intrahash = {cc20b952aa025cdb4174f726d5e015bd}, keywords = {2013 kepler proposal}, note = {cite arxiv:1309.0702Comment: NASA Kepler Mission White Paper; 10 pages, 2 figures}, timestamp = {2013-09-04T16:03:22.000+0200}, title = {Kepler White Paper: Asteroseismology of Solar-Like Oscillators in a 2-Wheel Mission}, url = {http://arxiv.org/abs/1309.0702}, year = 2013 }