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

Journal Article · · Frontiers in Astronomy and Space Sciences
 [1];  [2];  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. New Mexico State Univ., Las Cruces, NM (United States)
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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.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1558219
Report Number(s):
LA-UR--19-20247
Journal Information:
Frontiers in Astronomy and Space Sciences, Journal Name: Frontiers in Astronomy and Space Sciences Vol. 6; ISSN 2296-987X
Publisher:
Frontiers Research FoundationCopyright Statement
Country of Publication:
United States
Language:
English

References (22)

A search for non-pulsating, chemically normal stars in the δ Scuti instability strip using Kepler data journal January 2015
Gaia luminosities of pulsating A-F stars in the Kepler field journal June 2018
The Kepler characterization of the variability among A- and F-type stars. I. General overview text January 2011
Using asteroseismology to characterise exoplanet host stars preprint January 2018
Asteroseismology book January 2010
The Kepler characterization of the variability among A- and F-type stars : I. General overview journal October 2011
Nonradial and radial period changes of the δ Scuti star 4 CVn : II. Systematic behavior over 40 years journal March 2017
Asteroseismology of HADS stars: V974 Oph, a radial pulsator flavoured by nonradial components journal October 2003
Amplitude modulation in δ Sct stars: statistics from an ensemble of Kepler targets journal January 2017
Kepler Asteroseismology Program: Introduction and First Results
  • Gilliland, Ronald L.; Brown, Timothy M.; Christensen-Dalsgaard, Jørgen
  • Publications of the Astronomical Society of the Pacific, Vol. 122, Issue 888 https://doi.org/10.1086/650399
journal February 2010
The K2 Mission: Characterization and Early Results
  • Howell, Steve B.; Sobeck, Charlie; Haas, Michael
  • Publications of the Astronomical Society of the Pacific, Vol. 126, Issue 938 https://doi.org/10.1086/676406
journal April 2014
Hot Subluminous Stars journal July 2016
HYBRID γ DORADUS-δ SCUTI PULSATORS: NEW INSIGHTS INTO THE PHYSICS OF THE OSCILLATIONS FROM KEPLER OBSERVATIONS journal March 2010
OBSERVATIONAL Δ ν –$\bar{\rho }$ RELATION FOR δ Sct STARS USING ECLIPSING BINARIES AND SPACE PHOTOMETRY journal September 2015
Super-Nyquist asteroseismology with the Kepler Space Telescope journal February 2013
Catalogue and properties of δ Scuti stars in binaries journal October 2016
Semi-empirical seismic relations of A-F stars from COROT and Kepler legacy data journal July 2017
Characterizing the observational properties of δ Sct stars in the era of space photometry from the Kepler mission journal February 2018
Kepler Planet-Detection Mission: Introduction and First Results journal January 2010
UNEXPECTED SERIES OF REGULAR FREQUENCY SPACING OF δ SCUTI STARS IN THE NON-ASYMPTOTIC REGIME. I. THE METHODOLOGY journal May 2016
THE K2 ECLIPTIC PLANE INPUT CATALOG (EPIC) AND STELLAR CLASSIFICATIONS OF 138,600 TARGETS IN CAMPAIGNS 1–8 journal May 2016
UNEXPECTED SERIES OF REGULAR FREQUENCY SPACING OF δ SCUTI STARS IN THE NON-ASYMPTOTIC REGIME. II. SAMPLE–ECHELLE DIAGRAMS AND ROTATION journal June 2016

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
Kepler mission
Stars