Publications (1)0 Total impact
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Lewis C. Roberts Jr,
Emily L. Rice,
Charles A. Beichman,
Douglas Brenner,
Rick Burruss,
Justin R. Crepp,
Richard G. Dekany,
Lynne A. Hillenbrand,
Sasha Hinkley,
E. Robert Ligon, [......],
Laurent Pueyo,
Jennifer E. Roberts,
Michael Shao,
Anand Sivaramakrishnan,
Rémi Soummer,
Gautam Vasisht, Fred E. Vescelus,
J. Kent Wallace,
Neil T. Zimmerman,
Chengxing Zhai
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ABSTRACT: We used the Project 1640 near-infrared coronagraph and integral field
spectrograph to observe 19 young solar type stars. Five of these stars are
known binary stars and we detected the late-type secondaries and were able to
measure their JH spectra with a resolution of R\sim30. The reduced, extracted,
and calibrated spectra were compared to template spectra from the IRTF spectral
library. With this comparison we test the accuracy and consistency of spectral
type determination with the low-resolution near-infrared spectra from P1640.
Additionally, we determine effective temperature and surface gravity of the
companions by fitting synthetic spectra calculated with the PHOENIX model
atmosphere code. We also present several new epochs of astrometry of each of
the systems. Together these data increase our knowledge and understanding of
the stellar make up of these systems. In addition to the astronomical results,
the analysis presented helps validate the Project 1640 data reduction and
spectral extraction processes and the utility of low-resolution, near-infrared
spectra for characterizing late-type companions in multiple systems.
05/2012;
