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Title: IRTF/SPEX OBSERVATIONS OF THE UNUSUAL KEPLER LIGHT CURVE SYSTEM KIC 8462852

We have utilized the NASA/IRTF 3 m SpeX instrument’s high-resolution spectral mode to observe and characterize the near-infrared flux emanating from the unusual Kepler light curve system KIC 8462852. By comparing the resulting 0.8–4.2 μm spectrum to a mesh of model photospheric spectra, the 6 emission line analyses of the Rayner et al. catalog, and the 25 system collections of debris disks we have observed to date using SpeX under the Near InfraRed Debris disk Survey, we have been able to additionally characterize the system. Within the errors of our measurements, this star looks like a normal solar abundance main-sequence F1V to F3V dwarf star without any obvious traces of significant circumstellar dust or gas. Using Connelley and Greene’s emission measures, we also see no evidence of significant ongoing accretion onto the star nor any stellar outflow away from it. Our results are inconsistent with large amounts of static close-in obscuring material or the unusual behavior of a YSO system, but are consistent with the favored episodic giant comet models of a Gyr old stellar system favored by Boyajian et al. We speculate that KIC 8462852, like the ∼1.4 Gyr old F2V system η Corvi, is undergoing a late heavymore » bombardment, but is only in its very early stages.« less
Authors:
 [1] ;  [2] ;  [3]
  1. JHU-APL, 11100 Johns Hopkins Road, Laurel, MD 20723 (United States)
  2. Department of Physics, University of Cincinnati, Cincinnati, OH 45221-0011 (United States)
  3. Department of Physics and Astronomy, Iowa State University, 12 Physics Hall, Ames, IA 50010 (United States)
Publication Date:
OSTI Identifier:
22518650
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 815; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CATALOGS; COMETS; COMPARATIVE EVALUATIONS; COSMIC DUST; DIAGRAMS; DWARF STARS; EMISSION SPECTRA; ERRORS; RESOLUTION; SCATTERING; VISIBLE RADIATION