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 Bastien, Dmitry Bizyaev, Justin R. Crepp, Eric B. Ford, Peter M. Frinchaboy, Domingo Anibal Garcia-HernandezAna Elia Garcia Perez, B. Scott Gaudi, Jian Ge, Frederick R. Hearty, Bo Ma, Steve R. Majewski, Szabolcs Meszaros, David L. Nidever, Kaike Pan, Joshua Pepper, Marc H. Pinsonneault, Ricardo P. Schiavon, Donald P. Schneider, John C. Wilson, Olga Zamora, Gail Zasowski

Research output: Contribution to journalArticle

11 Citations (Scopus)

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 Sloan Digital Sky Survey III multiplexed Apache Point Observatory Galactic Evolution Experiment (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 (RV) precision of 100-200 m s-1. 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-1 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 (Teff, ) and chemical abundances of over a dozen elements to probe correlations of planet properties with individual elemental abundances.

Original languageEnglish (US)
Article number143
JournalAstronomical Journal
Volume149
Issue number4
DOIs
StatePublished - Apr 1 2015

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galactic evolution
planets
observatories
planet
observatory
radial velocity
spectrographs
experiment
Kepler mission
stars
survey design
astrophysics
multiplexing
near infrared
time measurement
probe
orbits
probes
project

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Fleming, S. W., Mahadevan, S., Deshpande, R., Bender, C. F., Terrien, R. C., Marchwinski, R. C., ... Zasowski, G. (2015). The apogee spectroscopic survey of Kepler planet hosts: Feasibility, efficiency, and first results. Astronomical Journal, 149(4), [143]. https://doi.org/10.1088/0004-6256/149/4/143
Fleming, Scott W. ; Mahadevan, Suvrath ; Deshpande, Rohit ; Bender, Chad F. ; Terrien, Ryan C. ; Marchwinski, Robert C. ; Wang, Ji ; Roy, Arpita ; Stassun, Keivan G. ; Prieto, Carlos Allende ; Cunha, Katia ; Smith, Verne V. ; Agol, Eric ; Ak, Hasan ; Bastien, Fabienne ; Bizyaev, Dmitry ; Crepp, Justin R. ; Ford, Eric B. ; Frinchaboy, Peter M. ; Garcia-Hernandez, Domingo Anibal ; Garcia Perez, Ana Elia ; Gaudi, B. Scott ; Ge, Jian ; Hearty, Frederick R. ; Ma, Bo ; Majewski, Steve R. ; Meszaros, Szabolcs ; Nidever, David L. ; Pan, Kaike ; Pepper, Joshua ; Pinsonneault, Marc H. ; Schiavon, Ricardo P. ; Schneider, Donald P. ; Wilson, John C. ; Zamora, Olga ; Zasowski, Gail. / The apogee spectroscopic survey of Kepler planet hosts : Feasibility, efficiency, and first results. In: Astronomical Journal. 2015 ; Vol. 149, No. 4.
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Fleming, SW, Mahadevan, S, Deshpande, R, Bender, CF, Terrien, RC, Marchwinski, RC, Wang, J, Roy, A, Stassun, KG, Prieto, CA, Cunha, K, Smith, VV, Agol, E, Ak, H, Bastien, F, Bizyaev, D, Crepp, JR, Ford, EB, Frinchaboy, PM, Garcia-Hernandez, DA, Garcia Perez, AE, Gaudi, BS, Ge, J, Hearty, FR, Ma, B, Majewski, SR, Meszaros, S, Nidever, DL, Pan, K, Pepper, J, Pinsonneault, MH, Schiavon, RP, Schneider, DP, Wilson, JC, Zamora, O & Zasowski, G 2015, 'The apogee spectroscopic survey of Kepler planet hosts: Feasibility, efficiency, and first results', Astronomical Journal, vol. 149, no. 4, 143. https://doi.org/10.1088/0004-6256/149/4/143

The apogee spectroscopic survey of Kepler planet hosts : Feasibility, efficiency, and first results. / Fleming, Scott W.; Mahadevan, Suvrath; Deshpande, Rohit; Bender, Chad F.; Terrien, Ryan C.; Marchwinski, Robert C.; Wang, Ji; Roy, Arpita; Stassun, Keivan G.; Prieto, Carlos Allende; Cunha, Katia; Smith, Verne V.; Agol, Eric; Ak, Hasan; Bastien, Fabienne; Bizyaev, Dmitry; Crepp, Justin R.; Ford, Eric B.; Frinchaboy, Peter M.; Garcia-Hernandez, Domingo Anibal; Garcia Perez, Ana Elia; Gaudi, B. Scott; Ge, Jian; Hearty, Frederick R.; Ma, Bo; Majewski, Steve R.; Meszaros, Szabolcs; Nidever, David L.; Pan, Kaike; Pepper, Joshua; Pinsonneault, Marc H.; Schiavon, Ricardo P.; Schneider, Donald P.; Wilson, John C.; Zamora, Olga; Zasowski, Gail.

In: Astronomical Journal, Vol. 149, No. 4, 143, 01.04.2015.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The apogee spectroscopic survey of Kepler planet hosts

T2 - Feasibility, efficiency, and first results

AU - Fleming, Scott W.

AU - Mahadevan, Suvrath

AU - Deshpande, Rohit

AU - Bender, Chad F.

AU - Terrien, Ryan C.

AU - Marchwinski, Robert C.

AU - Wang, Ji

AU - Roy, Arpita

AU - Stassun, Keivan G.

AU - Prieto, Carlos Allende

AU - Cunha, Katia

AU - Smith, Verne V.

AU - Agol, Eric

AU - Ak, Hasan

AU - Bastien, Fabienne

AU - Bizyaev, Dmitry

AU - Crepp, Justin R.

AU - Ford, Eric B.

AU - Frinchaboy, Peter M.

AU - Garcia-Hernandez, Domingo Anibal

AU - Garcia Perez, Ana Elia

AU - Gaudi, B. Scott

AU - Ge, Jian

AU - Hearty, Frederick R.

AU - Ma, Bo

AU - Majewski, Steve R.

AU - Meszaros, Szabolcs

AU - Nidever, David L.

AU - Pan, Kaike

AU - Pepper, Joshua

AU - Pinsonneault, Marc H.

AU - Schiavon, Ricardo P.

AU - Schneider, Donald P.

AU - Wilson, John C.

AU - Zamora, Olga

AU - Zasowski, Gail

PY - 2015/4/1

Y1 - 2015/4/1

N2 - 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 Sloan Digital Sky Survey III multiplexed Apache Point Observatory Galactic Evolution Experiment (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 (RV) precision of 100-200 m s-1. 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-1 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 (Teff, ) and chemical abundances of over a dozen elements to probe correlations of planet properties with individual elemental abundances.

AB - 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 Sloan Digital Sky Survey III multiplexed Apache Point Observatory Galactic Evolution Experiment (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 (RV) precision of 100-200 m s-1. 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-1 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 (Teff, ) and chemical abundances of over a dozen elements to probe correlations of planet properties with individual elemental abundances.

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