J/A+A/631/A126 KIC 9832227 light curves (Kovacs+, 2019)
The hierarchical triple nature of the former red nova precursor candidate
KIC 9832227.
Kovacs G., Hartman, J.D., Bakos A.G.
<Astron. Astrophys. 631, A126 (2019)>
=2019A&A...631A.126K 2019A&A...631A.126K (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Binaries, spectroscopic ; Photometry
Keywords: binaries: eclipsing - binaries: spectroscopic -
stars: individual: KIC 9832227 - stars: variables: general -
binaries: general
Abstract:
We revisit the issue of period variation of the recently claimed red
nova precursor candidate KIC 9832227. By using the data gathered
during the main mission of the Kepler satellite, and data collected by
ground-based wide-field surveys and other monitoring programs (such as
ASAS-SN), we find that the currently available timing data strongly
support a model consisting of the known W UMa binary and a distant
low-mass companion with an orbital period of ∼13.5 years. The period
of the W UMa component exhibits a linear period decrease at a rate of
(1.10±0.05)x10-6 days per year, within the range of many other
similar systems. This rate of decrease is several orders of magnitude
lower than that of V1309 Sco, the first (and so far the only)
well-established binary precursor of a nova observed a few years
before the outburst. The high-fidelity fit of the timing data and the
conformity of the derived minimum mass of (0.38±0.02)M☉ of the
outer companion from these data with the limit posed by the
spectroscopic non-detection of this component are in agreement with
the suggested hierarchical nature of this system.
Description:
These are the time series segments used in the paper from the HATNet
survey to compute the O-C values for KIC 9832227.
Objects:
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RA (2000) DE Designation(s)
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19 29 15.95 +46 37 19.9 KIC 9832227 = ASAS J192916+4637.3
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
hat_1.dat 36 5215 *Time series of set hat_1
hat_2.dat 36 5336 *Time series of set hat_2
hat_3.dat 36 6262 *Time series of set hat_3
hat_4a.dat 36 10796 *Time series of set hat_4a
hat_4b.dat 36 4682 *Time series of set hat_4b
hat_5.dat 36 206 *Time series of set hat_5
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Note on hat_1.dat, hat_2.dat, hat_3.dat: Sets resulted from post-processing
the time series obtained from the ensemble photometry by using the method of
External Parameter Decorrelation (EPD), as given by Bakos et al.,
2010ApJ...710.1724B 2010ApJ...710.1724B, Cat. J/ApJ/710/1724).
Note on hat_4a.dat, hat_4b.dat, hat_5.dat: Sets are the result of simple
ensemble photometry.
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Byte-by-byte Description of file: hat_1.dat hat_2.dat hat_3.dat
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Bytes Format Units Label Explanations
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2- 16 F15.7 d BJD Barycentric Julian date (BJD_TDB)
19- 26 F8.5 mag Imag Bessel I magnitude
30- 36 F7.5 mag e_Imag Error of Imag (G1)
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Byte-by-byte Description of file: hat_4a.dat hat_4b.dat hat_5.dat
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Bytes Format Units Label Explanations
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2- 16 F15.7 d BJD Barycentric Julian date (BJD_TDB)
19- 26 F8.5 mag rmag SDSS r magnitude
30- 36 F7.5 mag e_rmag Error of rmag (G1)
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Global notes:
Note (G1): Errors are based on the quality of the images used in the aperture
photometry.
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Acknowledgements:
Geza Kovacs, kovacs(at)konkoly.hu
(End) Patricia Vannier [CDS] 30-Sep-2019