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The APOGEE Spectroscopic Survey of Kepler Planet Hosts: Feasibility, Efficiency, and First Results | | Scott W. Fleming
; Suvrath Mahadevan
; Rohit Deshpande
; Chad F. Bender
; Ryan C. Terrien
; Robert C. Marchwinski
; Ji Wang
; Arpita Roy
; Keivan G. Stassun
; Carlos Allende Prieto
; Katia Cunha
; Verne V. Smith
; Eric Agol
; Hasan Ak
; Fabienne A. Bastien
; Dmitry Bizyaev
; Justin R. Crepp
; Eric B. Ford
; Peter M. Frinchaboy
; Domingo Aníbal García-Hernández
; Ana Elia García Pérez
; B. Scott Gaudi
; Jian Ge
; Fred Hearty
; Bo Ma
; Steve R. Majewski
; Szabolcs Mészáros
; David L. Nidever
; Kaike Pan
; Joshua Pepper
; Marc H. Pinsonneault
; Ricardo P. Schiavon
; Donald P. Schneider
; John C. Wilson
; Olga Zamora
; Gail Zasowski
; | | Date: |
17 Feb 2015 | | Abstract: | The Kepler mission has yielded a large number of planet candidates from among
the Kepler Objects of Interest (KOIs), but spectroscopic follow-up of these
relatively faint stars is a serious bottleneck in confirming and characterizing
these systems. We present motivation and survey design for an ongoing project
with the SDSS-III multiplexed APOGEE near-infrared spectrograph to monitor
hundreds of KOI host stars. We report some of our first results using
representative targets from our sample, which include current planet candidates
that we find to be false positives, as well as candidates listed as false
positives that we do not find to be spectroscopic binaries. With this survey,
KOI hosts are observed over ~20 epochs at a radial velocity precision of
100-200 m/s. These observations can easily identify a majority of false
positives caused by physically-associated stellar or substellar binaries, and
in many cases, fully characterize their orbits. We demonstrate that APOGEE is
capable of achieving RV precision at the 100-200 m/s level over long time
baselines, and that APOGEE’s multiplexing capability makes it substantially
more efficient at identifying false positives due to binaries than other
single-object spectrographs working to confirm KOIs as planets. These APOGEE
RVs enable ancillary science projects, such as studies of fundamental stellar
astrophysics or intrinsically rare substellar companions. The coadded APOGEE
spectra can be used to derive stellar properties (T_eff, log(g)) and chemical
abundances of over a dozen elements to probe correlations of planet properties
with individual elemental abundances. | | Source: | arXiv, 1502.5035 | | Services: | Forum | Review | PDF | Favorites | |
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