J/A+A/506/465 Solar-like oscillations in red giants (Hekker+, 2009)
Characteristics of solar-like oscillations in red giants observed in the CoRoT
exoplanet field.
Hekker S., Kallinger T., Baudin F., De Ridder J., Barban C., Carier F.,
Hatzes A.P., Weiss W.W., Baglin A.
<Astron. Astrophys. 506, 465 (2009)>
=2009A&A...506..465H 2009A&A...506..465H
ADC_Keywords: Stars, giant ; Photometry
Keywords: stars: oscillations - methods: observational - techniques: photometric
Abstract:
We present the results of a statistical study of solar-like
oscillations in red-giant stars observed with CoRoT in its exoplanet
field during the first long run (LRc01) when the satellite was pointed
towards the galactic centre. From the approximately 11400 stars
observed, the giants are selected using infrared colours (not
dereddened) and the solar-like oscillation signature (a broad envelope
with oscillation power at frequencies below 120 microHz). This
oscillation power is either detected by a semi-automatic procedure
(sap), or by a manual inspection by eye (man).
Description:
For the 778 stars for which we were able to detect oscillations we fit
a power law with a gaussian for the background signal and oscillation
signal respectively. The centre of the gaussian is taken as the
frequency of maximum oscillation power (numax). The large frequency
separations (deltanu) between radial modes with consecutive orders
are computed using the autocorrelation of the Fourier spectra, the
comb response function and the power spectrum of the power spectrum.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 65 778 Oscillation parameters of 778 red giants
observed with CoRoT
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See also:
B/corot : CoRoT observation log (CoRoT, 2009)
J/A+A/479/865 : CoRoT exoplanet candidates (Loeillet+, 2008)
http://smsc.cnes.fr/COROT : COROT Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 I9 --- CoRoT COROT identification number
13- 18 F6.3 mag Vmag Apparent magnitude
22- 30 F9.5 deg RAdeg Right ascension (J2000)
34- 41 F8.5 deg DEdeg Declination (J2000)
45- 47 A3 --- Method [sap man] Method used (1)
50- 54 F5.1 uHz numax Frequency of maximum oscillation power
57- 60 F4.1 uHz deltanu ? Large frequency separation
64- 65 A2 --- n_deltanu Number of methods used for deltanu
determination
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Note (1): Method as follows:
sap = Semi-Automatic Procedure
man = manual
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Acknowledgements:
Saskia Hekker, saskia(at)bison.ph.bham.ac.uk
(End) Saskia Hekker [Birmingham Univ., UK], Patricia Vannier [CDS] 26-Jun-2009