J/A+A/569/A15 KIC 10553698A asteroseismology (Ostensen+, 2014)
Asteroseismology revealing trapped modes in KIC 10553698A.
Ostensen R.H., Telting J.H., Reed M.D., Baran A.S., Nemeth P., Kiaeerad F.
<Astron. Astrophys. 569, A15 (2014)>
=2014A&A...569A..15O 2014A&A...569A..15O
ADC_Keywords: Stars, subdwarf ; Spectroscopy ; Radial velocities
Keywords: subdwarfs - binaries: close - stars: oscillations -
stars: individual: KIC 10553698
Abstract:
The subdwarf-B pulsator, KIC10553698A, is one of 16 such objects
observed with one-minute sampling for most of the duration of the
Kepler Mission. Like most of these stars, it displays a rich g-mode
pulsation spectrum with several clear multiplets that maintain regular
frequency splitting. We identify these pulsation modes as components
of rotationally split multiplets in a star rotating with a period of
∼41d. From 162 clearly significant periodicities, we are able to
identify 156 as likely components of l=1 or l=2 multiplets. For the
first time we are able to detect l=1 modes that interpose in the
asymptotic period sequences and that provide a clear indication of
mode trapping in a stratified envelope, as predicted by theoretical
models. A clear signal is also present in the Kepler photometry at
3.387d. Spectroscopic observations reveal a radial-velocity amplitude
of 64.8km/s. We find that the radial-velocity variations and the
photometric signal have phase and amplitude that are perfectly
consistent with a Doppler-beaming effect and conclude that the unseen
companion, KIC10553698B, must be a white dwarf most likely with a mass
close to 0.6M☉.
Description:
The two tables contain the radial velocity data and frequency list as
tabulated in the on-line appendix tables A.1 and B.1.
Objects:
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RA (2000) DE Designation(s)
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19 53 08.39 +47 43 00.2 KIC 10553698A = KIC 10553698
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
rvs.dat 28 42 Radial velocity data (table A1)
peaks.dat 60 162 Frequencies, periods, and amplitudes (table B1)
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See also:
B/corot : CoRoT observation log Release 13 (CoRoT, 2009-2014)
J/A+A/506/111 : Frequency analysis of HD180642 (V1449 Aql) (Degroote+, 2009)
J/A+A/506/143 : Pulsations of HD 181231 (Neiner+, 2009)
J/A+A/506/471 : Frequency analysis of CoRoT B stars (Degroote+, 2009)
J/A+A/506/79 : Asteroseismic analysis of HD 174936 (Garcia Hernandez+ 2009)
J/ApJ/718/L97 : Early asteroseismic results from Kepler (Van Grootel+, 2010)
J/A+A/525/A23 : Frequency analysis of HD 49434 (Mathias+, 2011)
J/MNRAS/412/1210 : Kepler asteroseismic targets (Molenda-Zakowicz+, 2011)
J/ApJ/749/152 : Asteroseismic analysis of 22 solar-type stars (Mathur+ 2012)
J/A+A/551/A12 : HD 48977 frequency analysis (Thoul+, 2013)
J/A+A/553/A127 : Frequency tables of KIC4931738 & KIC6352430 (Papics+, 2013)
J/A+A/556/A56 : KIC 11285625: detected frequencies (Debosscher+, 2013)
J/A+A/556/A87 : CoRoT-100866999 frequency analysis (Chapellier+, 2013)
J/A+A/559/A63 : HD174966 photometric frequencies (Garcia Hernandez+, 2013)
J/A+A/565/A55 : CoRoT 105906206 frequencies analysis (da Silva+, 2014)
J/ApJS/210/1 : Asteroseismic study of solar-type stars (Chaplin+, 2014)
Byte-by-byte Description of file: rvs.dat
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Bytes Format Units Label Explanations
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1- 10 F10.5 d Time HJD of mid exposure (HJD-2450000)
12- 17 F6.2 km/s RVobs [-28/119] Radial velocity (observed)
19- 23 F5.2 km/s e_RVobs [3.9/24.1] Error on radial velocity measurement
25- 28 A4 --- Obs Observatory ID (KPNO, NOT or WHT)
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Byte-by-byte Description of file: peaks.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- ID [1/162] Frequency identifier = sequence number
5- 12 F8.3 uHz Freq [46/4072] Frequency in microHz
14- 21 F8.2 s Per Period (Freq-1)
24- 29 F6.1 ppm Amp Fourier amplitude in parts-per-million
31- 33 A3 --- l [1|2- ] Mode ID l = 1, 2, 1|2, or - for no ID
35- 36 A2 --- n1 Order n for l=1 ID, or t for trapped
39- 40 A2 --- n2 Order n for l=2 ID, or t for trapped
43- 60 A18 --- State State stability flag
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Acknowledgements:
Roy Ostensen, roys(at)ster.kuleuven.be
(End) Roy Ostensen [K.U. Leuven], Patricia Vannier [CDS] 27-Jun-2014