A study of Pulsation & Rotation in a sample of A-K type stars in the Kepler field

Abstract

We present the results of time-series photometric analysis of 15106 A-K type stars observed by the Kepler space mission. We identified 513 new rotational variables and measured their starspot rotation periods as a function of spectral type and discuss the distribution of their amplitudes. We examined the well-established period-colour relationship that applies to stars of spectral types F5-K for all of these rotational variables and, interestingly, found that a similar period-colour relationship appears to extend to stars of spectral types A7 to early-F too. This result is not consistent with the very foundation of the period-colour relationship. We have characterized 350 new non-radial pulsating variables such as A- and F-type candidate $\delta$ Scuti, $\gamma$ Doradus and hybrid stars, which increases the known candidate non-radial pulsators in the Kepler field significantly, by $\sim$20\%. The relationship between two recently constructed observables, $Energy$ and $Efficiency$, was also studied for the large sample of non-radial pulsators, which shows that the distribution in the logarithm of $Energy$ ($\log (En)$) can be used as a potential tool to distinguish between the non-radial pulsators, to some extent. Through visual inspection of the light curves and their corresponding frequency spectra, we found 23 new candidate red giant solar-like oscillators not previously reported in the literature. The basic physical parameters such as masses, radii and luminosities of these solar-like oscillators were also derived using asteroseismic relations.

arXiv comment20 pages, 9 Figures, 4 online tables, Published in Astrophysics and Space Science (https://rdcu.be/bcqa4)

References in corpus (75)

• The K2 Mission: Characterization and Early results
• Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics
• Kepler Mission Design, Realized Photometric Performance, and Early Science
• Ages for illustrative field stars using gyrochronology: viability, limitations and errors
• Kepler Input Catalog: Photometric Calibration and Stellar Classification
• Rotation Periods of 34,030 Kepler Main-Sequence Stars: The Full Autocorrelation Sample
• On the rotational evolution of solar- and late-type stars, its magnetic origins, and the possibility of stellar gyrochronology
• The SDSS View of the Palomar-Green Bright Quasar Survey
• Revised Stellar Properties of Kepler Targets for the Quarter 1-16 Transit Detection Run
• Weakened magnetic braking as the origin of anomalously rapid rotation in old field stars
• Rotation and differential rotation of active Kepler stars
• The Kepler characterization of the variability among A- and F-type stars. I. General overview
• A spin-down clock for cool stars from observations of a 2.5-billion-year-old cluster
• A Revised Effective Temperature Scale for the Kepler Input Catalog
• Fundamental Properties of Stars using Asteroseismology from Kepler & CoRoT and Interferometry from the CHARA Array
• Asteroseismology of red giants from the first four months of Kepler data: Fundamental parameters
• Rotation periods of 12 000 main-sequence Kepler stars: Dependence on stellar spectral type and comparison with v sin i observations
• The Kepler Cluster Study: Stellar Rotation in NGC6811
• Gamma Doradus Stars: Defining a New Class of Pulsating Variables
• Solar-like oscillations in low-luminosity red giants: first results from Kepler
• Asteroseismology of 16000 Kepler Red Giants: Global Oscillation Parameters, Masses, and Radii
• Asteroseismic measurement of surface-to-core rotation in a main sequence A star, KIC 11145123
• The relation between $\Delta \nu$ and ${\nu }_{max}$ for solar-like oscillations
• Stellar Rotation in M35: Mass-Period Relations, Spin-Down Rates, and Gyrochronology
• Accurate fundamental parameters for 23 bright solar-type stars
• Hybrid gamma Doradus - delta Scuti pulsators: New insights into the physics of the oscillations from Kepler observations
• Calibrating Gyrochronology using Kepler Asteroseismic targets
• Observations of Cool-Star Magnetic Fields
• Asteroseismology of red giants from the first four months of Kepler data: Global oscillation parameters for 800 stars
• Testing the asteroseismic scaling relations for Red Giants with Eclipsing Binaries Observed by Kepler
• Radius determination of solar-type stars using asteroseismology: What to expect from the Kepler mission
• Rotation, differential rotation, and gyrochronology of active Kepler stars
• Angular Momentum Loss from Cool Stars: An Empirical Expression and Connection to Stellar Activity
• Verifying asteroseismically determined parameters of Kepler stars using hipparcos parallaxes: self-consistent stellar properties and distances
• Amplitude modulation in $\delta$ Sct stars: statistics from an ensemble study of Kepler targets
• The asteroseismic potential of Kepler: first results for solar-type stars
• An in-depth study of grid-based asteroseismic analysis
• Sounding open clusters: asteroseismic constraints from Kepler on the properties of NGC 6791 and NGC 6819
• On the relationship between the Delta Scuti and Gamma Doradus pulsators
• A new asteroseismic diagnostic for internal rotation in $\gamma$ Doradus stars
• Characterising the observational properties of δ Sct stars in the era of space photometry from the Kepler mission
• Turbulent convection and pulsation stability of stars - II. Theoretical instability strip for $\delta$ Scuti and $\gamma$ Doradus stars
• Spectroscopic survey of Kepler stars. I. HERMES/Mercator observations of A- and F-type stars
• Global stellar variability study in the field-of-view of the Kepler satellite
• Oscillating red giants observed during Campaign 1 of the Kepler K2 mission: New prospects for galactic archaeology
• The Detection of Multimodal Oscillations on Alpha UMa
• K2 Variable Catalogue II: Machine Learning Classification of Variable Stars and Eclipsing Binaries in K2 Fields 0-4
• Short-lived spots in solar-like stars as observed by CoRoT
• Detection of solar-like oscillations in relics of the Milky Way: asteroseismology of K giants in M4 using data from the NASA K2 mission
• Results of a Search for gamma Dor and delta Sct Stars with the Kepler Spacecraft
• The K2 Galactic Archaeology Program Data Release 1: Asteroseismic results from Campaign 1
• An assessment of the rotation rates of the host stars of extrasolar planets
• The K2 M67 Study: Revisiting old friends with K2 reveals oscillating red giants in the open cluster M67
• Challenges for asteroseismic analysis of Sun-like stars
• Automatic Determination of Stellar Parameters via Asteroseismology of Stochastically Oscillating Stars: Comparison with Direct Measurements
• Does the Sun Shrink with Increasing Magnetic Activity?
• Asteroseismic inferences on red giants in open clusters NGC 6791, NGC 6819 and NGC 6811 using Kepler
• Detection of solar-like oscillations from Kepler photometry of the open cluster NGC 6819
• Solar-like oscillations in red giants observed with \textit{Kepler}: influence of increased timespan on global oscillation parameters
• The gamma Dor CoRoT target HD49434. I-Results from the ground-based campaign
• Confirmation of simultaneous p and g mode excitation in HD 8801 and Gamma Peg from time-resolved multicolour photometry of six candidate "hybrid" pulsators
• Pulsational line profile variation of the roAp star HR 3831
• Atmospheric parameters and pulsational properties for a sample of $\delta$\,Sct, $\gamma$\,Dor, and hybrid {\it Kepler} targets
• The Nainital-Cape Survey-III : A Search for Pulsational Variability in Chemically Peculiar Stars
• Asteroseismology of solar-type stars with K2
• The hot Gamma-Doradus and Maia stars
• The Nainital-Cape Survey-IV
• Asteroseismology of red giants as a tool for studying stellar populations: first steps
• Asteroseismic properties of solar-type stars observed with the NASA K2 mission: results from Campaigns 1-3 and prospects for future observations
• Discovery of unusual pulsations in the cool, evolved Am stars HD 98851 and HD 102480
• Characterization of Kepler early-type targets
• Time-resolved photometric and spectroscopic analysis of a luminous Ap star HD103498
• Asteroseismology of the Hyades with K2: first detection of main-sequence solar-like oscillations in an open cluster
• A spectroscopic analysis of the chemically peculiar star HD207561
• High-resolution Spectroscopy and Spectropolarimetry of Selected Delta Scuti Pulsating Variables

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• Rotation and spots in normal A and Am/Fm stars
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• Meta-analysis of photometric and asteroseismic measurements of stellar rotation periods: the Lomb-Scargle periodogram, autocorrelation function, wavelet and rotational splitting analysis for 92 Kepler asteroseismic targets
• Prediction of short stellar activity cycles using derived and established empirical relations between activity and rotation periods
• Frequencies analysis of the hybrid delta Sct-gamma Dor star CoRoT-102314644