Automated extraction of oscillation parameters for Kepler observations of solar-type stars

By D. Huber, D. Stello, T. Bedding, W. Chaplin, T. Arentoft, P. Quirion, H. Kjeldsen. 2009

170 citations recorded by the source corpus.

The recent launch of the Kepler space telescope brings the opportunity to study oscillations systematically in large numbers of solar-like stars. In the framework of the asteroFLAG project, we have developed an automated pipeline to estimate global oscillation parameters, such as the frequency of maximum power (nu_max) and the large frequency spacing (Delta_nu), for a large number of time series. We present an effective method based on the autocorrelation function to find excess power and use a scaling relation to estimate granulation timescales as initial conditions for background modelling. We derive reliable uncertainties for nu_max and Delta_nu through extensive simulations. We have tested the pipeline on about 2000 simulated Kepler stars with magnitudes of V~7-12 and were able to correctly determine nu_max and Delta_nu for about half of the sample. For about 20%, the returned large frequency spacing is accurate enough to determine stellar radii to a 1% precision. We conclude that the methods presented here are a promising approach to process the large amount of data expected from Kepler.

Subfields: Astronomy and Astrophysics, Computational Mechanics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/4366bcfdaba29494c92e0af540f9878486dc6667

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. D. Huber
2. W. Chaplin
3. D. Stello
4. A. Miglio
5. B. Mosser
6. T. Bedding
7. D. Charbonneau
8. Timothy Morton

In Computational Mechanics

1. D. Huber
2. Jon M. Jenkins
3. D. Stello
4. Y. Elsworth
5. T. Bedding
6. S. Hekker
7. J. Ridder
8. T. Kallinger

In Instrumentation

1. D. Huber
2. D. Stello
3. W. Chaplin
4. B. Mosser
5. T. Bedding
6. A. Miglio
7. Y. Elsworth
8. S. Hekker

Citations in the corpus

• SOLAR-LIKE OSCILLATIONS IN LOW-LUMINOSITY RED GIANTS: FIRST RESULTS FROM KEPLER (2010, methodology): “The symbols show results obtained using the pipeline described by Huber et al. (2009), who also described the method used to fit and subtract the background.”
• Red-giant seismic properties analyzed with CoRoT (2010, methodology): “The new analysis that we present in this paper has been made possible by the use of the autocorrelation method (Mosser & Appourchaux, 2009), which is significatively different from what has been used in other works (Mathur et al., 2010b; Hekker et al., 2009; Huber et al., 2009).”
• The universal red-giant oscillation pattern; an automated determination with CoRoT data (2010, methodology): “Unfortunately, the methods currently used to determine the global oscillation parameters suffer from various sources of uncertainty (Hekker et al. 2009; Huber et al. 2009; Mathur et al. 2010).”
• Asteroseismology and Gaia: Testing Scaling Relations Using 2200 Kepler Stars with TGAS Parallaxes (2017, methodology): “We adopted values from the SYD pipeline (Huber et al. 2009), but note that differences between asteroseismic pipelines do not affect the conclusions in this paper (see also Section 3.3.1).”
• ASTEROSEISMOLOGY OF RED GIANTS FROM THE FIRST FOUR MONTHS OF KEPLER DATA: GLOBAL OSCILLATION PARAMETERS FOR 800 STARS (2010, methodology): “We have investigated the slope of the power law using amplitudes from four different methods (A2Z, COR, OCT and SYD, see Table 1 for references) and find on average: A650nm ∝ ν −0.8 max .”
• Asteroseismology of red giants from the first four months of Kepler data: Fundamental stellar parameters (2010, methodology): “Finally, we cross-checked our results forνmax and∆ν with those of other methods (Hekker et al. 2010a, Huber et al. 2009, Mathur et al. 2010, and Mosser & Appourchaux 2009) which have been used to determine the same seismic parameters for our sample (or subsample) of red giants.”
• Red giant masses and ages derived from carbon and nitrogen abundances (2015, unknown): “The raw light curves were prepared as described in Garc´ıa et al. (2011), and the seismic parameters ν max and (cid:4)ν were then measured using five different techniques (Huber et al. 2009; Hekker et al. 2010; Kallinger et al. 2010; Mathur et al. 2010; Mosser et al. 2011).”
• KEPLER MISSION STELLAR AND INSTRUMENT NOISE PROPERTIES (2011, background): “The Lorentzian description does however appear to fail at higher frequencies (e.g., see Huber et al. 2009; Karoff 2011), which is not a cause for concern here since the band-limited filtering used to construct the CDPP selects out PSD only at very low frequencies (see Section 4.2 above).”
• Standing on the Shoulders of Dwarfs: the Kepler Asteroseismic LEGACY Sample. I. Oscillation Mode Parameters (2016, methodology): “This is especially worthwhile because it is often amplitudes from this method that are extracted by automated analysis pipelines (see, e.g., Huber et al. 2009; Hekker et al. 2010; Mathur et al. 2010), and thus used in calibrating scaling relations (see, e.g., Stello et al. 2011; Huber et al. 2011;…”
• Determining global parameters of the oscillations of solar-like stars (2009, unknown): “Some teams have developed their own pipeline (Hekker et al. 2010; Huber et al. 2009) within the AsteroFLAG group to be ready to analyse the Kepler data.”
• Asteroseismology of old open clusters with Kepler: direct estimate of the integrated red giant branch mass-loss in NGC 6791 and 6819 (2011, methodology): “A detailed description of the asteroseismic parameters used in this work is given by Stello et al. (2011b), who used the method of Huber et al. (2009) to measure ∆ν and νmax.”
• TESTING SCALING RELATIONS FOR SOLAR-LIKE OSCILLATIONS FROM THE MAIN SEQUENCE TO RED GIANTS USING KEPLER DATA (2011, methodology): “…by Garćıa et al. (2011) and analyzed using several automated analysis methods (Bonanno et al. 2008; Campante et al. 2010; Hekker et al. 2010b; Huber et al. 2009; Kallinger et al. 2010a; Karoff et al. 2010; Mathur et al. 2010a; Mosser & Appourchaux 2009; Mosser et al. 2011b; Verner &…”
• FUNDAMENTAL PROPERTIES OF STARS USING ASTEROSEISMOLOGY FROM KEPLER AND CoRoT AND INTERFEROMETRY FROM THE CHARA ARRAY (2012, methodology): “Global asteroseismic parameters were extracted using the automated analysis pipeline by Huber et al. (2009), which has been shown to agree well with other methods (Hekker et al. 2011c; Verner et al. 2011).”