J/A+A/499/967 Long-term monitoring of γ Dor stars (Cuypers+, 2009)
Long-term photometric monitoring with the Mercator telescope.
Frequencies and multicolour amplitudes of gamma Doradus stars.
Cuypers J., Aerts C., De Cat P., De Ridder J., Goossens K., Schoenaers C.,
Uytterhoeven K., Acke B., Davignon G., Debosscher J., Decin L.,
De Meester W., Deroo P., Drummond R., Kolenberg K., Lefever K., Raskin G.,
Reyniers M., Saesen S., Vandenbussche B., Van Malderen R., Verhoelst T.,
Van Winckel H., Waelkens C.
<Astron. Astrophys. 499, 967 (2009)>
=2009A&A...499..967C 2009A&A...499..967C
ADC_Keywords: Stars, variable ; Photometry, Geneva
Keywords: stars: variables: general - stars: oscillations -
stars: individual: gamma Doradus - techniques: photometric
Abstract:
gamma Dor stars are excellent targets for asteroseismology since the
gravity modes present in these stars probe the deep stellar interiors.
Mode identification will improve the knowledge of these stars
considerably.
A selected group of gamma Dor stars and some candidates were observed
with the Mercator telescope to find and/or confirm the periodicities
in the light variations and to derive reliable amplitude ratios in
different pass bands.
A frequency analysis was performed on all new data obtained in the
Geneva photometric system. In order to have more reliable and accurate
frequencies, the new data were combined with similar data from the
literature and with Hipparcos observations. A set of frequencies that
minimized the residuals in a harmonic fit was searched for while
allowing means and amplitudes to vary from one observation set to
another.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 76 21 Results of the frequency analysis of the
Mercator data
mags.dat 157 21 Mean magnitudes
freq.dat 163 78 Summary of the results based on the Mercator data
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD HD number
8- 13 I6 --- HIP HIP number
15- 19 A5 --- SpT MK spectral type
21- 23 I3 --- N Number of observations used
25- 28 I4 d T Total time span
30- 36 F7.5 d-1 f1 Frequency f1
37 A1 --- u_f1 Uncertainty flag on f1 (1)
38- 44 F7.5 d-1 f2 ? Frequency f2
46- 52 F7.5 d-1 f3 ? Frequency f3
53 A1 --- u_f3 Uncertainty flag on f3 (1)
54- 60 F7.5 d-1 f4 ? Frequency f4
61 A1 --- u_f4 Uncertainty flag on f4 (1)
62- 68 F7.5 d-1 f5 ? Frequency f5
70- 76 F7.5 d-1 f6 ? Frequency f6
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Note (1): Frequencies not significant in all colour filters are indicated
by a colon.
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Byte-by-byte Description of file: mags.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [HD]
4- 9 I6 --- HD HD number
11- 16 F6.4 mag Umag Mean Geneva U magnitude
18- 23 F6.4 mag B1mag Mean Geneva B1 magnitude
25- 30 F6.4 mag Bmag Mean Geneva B magnitude
32- 37 F6.4 mag B2mag Mean Geneva B2 magnitude
39- 44 F6.4 mag V1mag Mean Geneva V1 magnitude
46- 51 F6.4 mag Vmag Mean Geneva V magnitude
53- 59 F7.4 mag Gmag Mean Geneva G magnitude
61- 66 F6.4 mag e_Umag rms uncertainty on Umag
68- 73 F6.4 mag e_B1mag rms uncertainty on B1mag
75- 80 F6.4 mag e_Bmag rms uncertainty on Bmag
82- 87 F6.4 mag e_B2mag rms uncertainty on B2mag
89- 94 F6.4 mag e_V1mag rms uncertainty on V1mag
96-101 F6.4 mag e_Vmag rms uncertainty on Vmag
103-108 F6.4 mag e_Gmag rms uncertainty on Gmag
110-115 F6.4 mag e_Uamp Amplitude error in U band
117-122 F6.4 mag e_B1amp Amplitude error in B1 band
124-129 F6.4 mag e_Bamp Amplitude error in B band
131-136 F6.4 mag e_B2amp Amplitude error in B2 band
138-143 F6.4 mag e_V1amp Amplitude error in V1 band
145-150 F6.4 mag e_Vamp Amplitude error in V band
152-157 F6.4 mag e_Gamp Amplitude error in G band
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Byte-by-byte Description of file: freq.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [HD]
4- 9 I6 --- HD HD number
11- 12 A2 --- fID Frequency name (f1 to f6)
14- 20 F7.5 d-1 Freq Frequency value
22- 28 F7.5 d Per Period
30- 35 F6.4 mag Uamp Amplitude in U band for this frequency
37- 42 F6.4 mag B1amp Amplitude in B1 band for this frequency
44- 49 F6.4 mag Bamp Amplitude in B band for this frequency
51- 56 F6.4 mag B2amp Amplitude in B2 band for this frequency
58- 63 F6.4 mag V1amp Amplitude in V1 band for this frequency
65- 70 F6.4 mag Vamp Amplitude in V band for this frequency
72- 77 F6.4 mag Gamp Amplitude in G band for this frequency
79- 85 F7.5 d-1 e_Freq Error in Freq
87- 93 F7.5 d e_Per Error in Per
95- 98 F4.2 --- UampR Amplitude ratio in U band (vs highest)
100-103 F4.2 --- B1ampR Amplitude ratio in B1 band (vs highest)
105-108 F4.2 --- BampR Amplitude ratio in B band (vs highest)
110-113 F4.2 --- B2ampR Amplitude ratio in B2 band (vs highest)
115-118 F4.2 --- V1ampR Amplitude ratio in V1 band (vs highest)
120-123 F4.2 --- VampR Amplitude ratio in V band (vs highest)
125-128 F4.2 --- GampR Amplitude ratio in G band (vs highest)
130-133 F4.2 --- e_UampR rms uncertainty on UampR
135-138 F4.2 --- e_B1ampR rms uncertainty on B1ampR
140-143 F4.2 --- e_BampR rms uncertainty on BampR
145-148 F4.2 --- e_B2ampR rms uncertainty on B2ampR
150-153 F4.2 --- e_V1ampR rms uncertainty on V1ampR
155-158 F4.2 --- e_VampR rms uncertainty on VampR
160-163 F4.2 --- e_GampR rms uncertainty on GampR
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 05-Jun-2009