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Title: Properties of 249 δ Scuti Variable Star Candidates Observed During the NASA K2 Mission

Abstract

In the second phase of the NASA Kepler mission (K2), the Kepler spacecraft observed fields along the ecliptic plane for about 80 days each to search for planetary transits and monitor stellar variability. We analyzed the light curves of thousands of main-sequence stars observed as part of the Kepler Guest Observer program. Here we summarize the statistics of discovery and properties of the pulsation amplitude spectra for 249 δ Scuti variable stars or candidates observed during K2 Campaigns 4 through 17. δ Sct variables are core or shell hydrogen-burning stars about twice as massive as the Sun, pulsating in many simultaneous radial and non-radial modes, with periods of about 2 h. The growing collection of long time-series high signal-to-noise photometric data from space missions such as Kepler, combined with constraints from ground and space-based data, will be useful to constrain the interior structure of these types of variables. We hope that this list of δ Sct candidates observed by Kepler will be useful as a starting point for identifying promising targets for asteroseismic investigations.

Authors:
ORCiD logo [1];  [2];  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. New Mexico State Univ., Las Cruces, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1558219
Report Number(s):
LA-UR-19-20247
Journal ID: ISSN 2296-987X
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
Frontiers in Astronomy and Space Sciences
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2296-987X
Publisher:
Frontiers Research Foundation
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Stars; Kepler mission

Citation Formats

Guzik, Joyce Ann, Garcia, Jorge, and Jackiewicz, Jason. Properties of 249 δ Scuti Variable Star Candidates Observed During the NASA K2 Mission. United States: N. p., 2019. Web. doi:10.3389/fspas.2019.00040.
Guzik, Joyce Ann, Garcia, Jorge, & Jackiewicz, Jason. Properties of 249 δ Scuti Variable Star Candidates Observed During the NASA K2 Mission. United States. doi:10.3389/fspas.2019.00040.
Guzik, Joyce Ann, Garcia, Jorge, and Jackiewicz, Jason. Fri . "Properties of 249 δ Scuti Variable Star Candidates Observed During the NASA K2 Mission". United States. doi:10.3389/fspas.2019.00040. https://www.osti.gov/servlets/purl/1558219.
@article{osti_1558219,
title = {Properties of 249 δ Scuti Variable Star Candidates Observed During the NASA K2 Mission},
author = {Guzik, Joyce Ann and Garcia, Jorge and Jackiewicz, Jason},
abstractNote = {In the second phase of the NASA Kepler mission (K2), the Kepler spacecraft observed fields along the ecliptic plane for about 80 days each to search for planetary transits and monitor stellar variability. We analyzed the light curves of thousands of main-sequence stars observed as part of the Kepler Guest Observer program. Here we summarize the statistics of discovery and properties of the pulsation amplitude spectra for 249 δ Scuti variable stars or candidates observed during K2 Campaigns 4 through 17. δ Sct variables are core or shell hydrogen-burning stars about twice as massive as the Sun, pulsating in many simultaneous radial and non-radial modes, with periods of about 2 h. The growing collection of long time-series high signal-to-noise photometric data from space missions such as Kepler, combined with constraints from ground and space-based data, will be useful to constrain the interior structure of these types of variables. We hope that this list of δ Sct candidates observed by Kepler will be useful as a starting point for identifying promising targets for asteroseismic investigations.},
doi = {10.3389/fspas.2019.00040},
journal = {Frontiers in Astronomy and Space Sciences},
number = ,
volume = 6,
place = {United States},
year = {2019},
month = {5}
}

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