J/A+A/393/965 Intrinsic frequencies of slowly pulsating B stars (de Cat+, 2002)
A study of bright southern slowly pulsating B stars.
II. The intrinsic frequencies.
de Cat P., Aerts C.
<Astron. Astrophys. 393, 965 (2002)>
=2002A&A...393..965D 2002A&A...393..965D
ADC_Keywords: Stars, variable ; Stars, early-type ; Binaries, spectroscopic
Keywords: stars: early-type - stars : variables : general -
stars: oscillations - binaries: spectroscopic - line: profiles
Description:
We present the results of detailed frequency analyses of a sample of
thirteen confirmed slowly pulsating B stars. Our analysis is based on
a combination of elaborate photometric and spectroscopic data-sets.
The original sample consists of a mixture of five confirmed slowly
pulsating B stars and twelve candidate slowly pulsating B stars
discovered thanks to the photometric measurements of the HIPPARCOS
satellite. HD 55522 and HD 131120 turn out to be chemically peculiar
stars. HD 169978 and HD 69144 are two ellipsoidal variables for which
no intrinsic variability is found. At least nine of the thirteen
studied slowly pulsating B stars are multi-periodic.
We here present the observed amplitudes, phases and their
corresponding standard errors of the variations with the accepted
intrinsic frequencies in the first three normalised velocity moments
of the SiII 413.0nm line profiles, in the seven filters of the Geneva
photometric system, and in the Hp filter of the HIPPARCOS photometric
system. They are determined by fitting the data with a superposition
of sinusoidal models with reference epoch HJD=2450000. For the higher
order moments, the appropriate interaction terms are also taken into
account (see Mathias et al., 1994A&A...283..813M 1994A&A...283..813M). We use the same
notations as in Aerts (1996A&A...314..115A 1996A&A...314..115A) and Aerts (2000, Cat.
J/A+A/361/245) for the amplitudes of respectively the velocity
moments and the variations in the Geneva data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 125 17 Parameters of the targets in the sample of Aerts
et al. (1999A&A...343..872A 1999A&A...343..872A)
tables.dat 366 30 Intrinsic variations (tables 2-4, 6-15)
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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- 12 A12 --- Class Classification (SB1, SB2 or Single)
14 A1 --- Note [ab*] Note (1)
16- 17 A2 --- --- [HD]
19- 24 I6 --- HD HD (Cat. III/135) number
26- 28 A3 --- --- [HIP]
30- 35 I6 --- HIP HIP (Cat. I/239) number
37- 38 I2 h RAh Right ascension (J2000)
40- 41 I2 min RAm Right ascension (J2000)
43- 46 F4.1 s RAs Right ascension (J2000)
48 A1 --- DE- Declination sign (J2000)
49- 50 I2 deg DEd Declination (J2000)
52- 53 I2 arcmin DEm Declination (J2000)
55- 56 I2 arcsec DEs Declination (J2000)
58- 64 A7 --- SpType Spectral type
66- 70 I5 K Teff Effective temperature
72- 74 I3 K e_Teff rms uncertainty on Teff
76- 79 F4.2 [cm/s2] logg Surface gravity
81- 83 F3.2 [cm/s2] e_logg rms uncertainty on logg
85- 88 F4.2 [solLum] logL1 Luminosity of the primary
90- 92 F3.2 [solLum] e_logL1 rms uncertainty on logL1
94- 96 F3.1 solMass Mass1 Mass of the primary
98- 99 F2.1 solMass e_Mass1 rms uncertainty on Mass1
101-103 F3.1 solRad Rad1 Radius of the primary
105-107 F3.1 solRad e_Rad1 rms uncertainty on Rad1
109-113 F5.2 mag Mbol Bolometric magnitude
115-117 F3.2 mag e_Mbol rms uncertainty on Mbol
119-121 I3 pc Dist Distance
123-125 I3 pc e_Dist rms uncertainty on Dist
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Note (1): Note:
*: confirmed SPBs known before the HIPPARCOS mission
a: new spectroscopic binary
b: chemically peculiar stars
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Byte-by-byte Description of file: tables.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [HD]
3- 8 I6 --- HD HD number of the star
9- 16 F8.5 d-1 Freq Pulsation frequency
17- 24 F8.5 d-1 e_Freq Standard error on Freq
25- 28 I4 --- K Ratio of horizontal to vertical velocity
Amplitude
29- 32 I4 --- e_K Standard error on K
33- 38 F6.2 km/s AA *? Amplitude of term varying with Freq in the
first velocity moment
39- 43 F5.2 km/s e_AA ? Standard error on AA
44- 49 F6.3 --- phiAA ? [0,1[ Phase of term varying with Freq in the
first velocity moment
50- 55 F6.3 --- e_phiAA ? Standard error on phiAA
56- 60 F5.1 km2/s2 CC *? Amplitude of term varying with 2.Freq in the
second velocity moment
61- 65 F5.1 km2/s2 e_CC ? Standard error on CC
66- 70 F5.2 --- phiCC ? [0,1[ Phase of term varying with 2.Freq in the
second velocity moment
71- 75 F5.2 --- e_phiCC ? Standard error on phiCC
76- 81 F6.1 km2/s2 DD *? Amplitude of term varying with Freq in the
second velocity moment
82- 86 F5.1 km2/s2 e_DD ? Standard error on DD
87- 92 F6.3 --- phiDD ? [0,1[ Phase of term varying with Freq in the
second velocity moment
93- 98 F6.3 --- e_phiDD ? Standard error on phiDD
99-105 F7.1 km2/s2 EE *? Amplitude of constant term in the
second velocity moment
106-110 F5.1 km2/s2 e_EE ? Standard error on EE
111-116 I6 km3/s3 FF *? Amplitude of term varying with 3.Freq in the
third velocity moment
117-121 I5 km3/s3 e_FF ? Standard error on FF
122-126 F5.2 --- phiFF ? [0,1[ Phase of term varying with 3.Freq in the
third velocity moment
127-131 F5.2 --- e_phiFF ? Standard error on phiFF
132-137 I6 km3/s3 GG *? Amplitude of term varying with 2.Freq in the
third velocity moment
138-142 I5 km3/s3 e_GG ? Standard error on GG
143-147 F5.2 --- phiGG ? [0,1[ Phase of term varying with 2.Freq in the
third velocity moment
148-152 F5.2 --- e_phiGG ? Standard error on phiGG
153-159 I7 km3/s3 RST *? Amplitude of term varying with Freq in the
third velocity moment
160-164 I5 km3/s3 e_RST ? Standard error on RST
165-170 F6.3 --- phiRST ? [0,1[ Phase of term varying with Freq in the
third velocity moment
171-176 F6.3 --- e_phiRST ? Standard error on phiRST
177-182 F6.1 mmag AU *? Amplitude of variations with Freq in
Geneva U measurements
183-186 F4.1 mmag e_AU ? Standard error on AU
187-192 F6.3 --- phiU ? [0,1[ Phase of variations with Freq in
Geneva U measurements
193-198 F6.3 --- e_phiU ? Standard error on phiU
199-204 F6.1 mmag AB1 *? Amplitude of variations with Freq in
Geneva B1 measurements
205-208 F4.1 mmag e_AB1 ? Standard error on AB1
209-214 F6.3 --- phiB1 ? [0,1[ Phase of variations with Freq in
Geneva B1 measurements
215-220 F6.3 --- e_phiB1 ? Standard error on phiB1
221-226 F6.1 mmag AB *? Amplitude of variations with Freq in
Geneva B measurements
227-230 F4.1 mmag e_AB ? Standard error on AB
231-236 F6.3 --- phiB ? [0,1[ Phase of variations with Freq in
Geneva B measurements
237-242 F6.3 --- e_phiB ? Standard error on phiB
243-248 F6.1 mmag AB2 *? Amplitude of variations with Freq in
Geneva B2 measurements
249-252 F4.1 mmag e_AB2 ? Standard error on AB2
253-258 F6.3 --- phiB2 ? [0,1[ Phase of variations with Freq in
Geneva B2 measurements
259-264 F6.3 --- e_phiB2 ? Standard error on phiB2
265-270 F6.1 mmag AV1 *? Amplitude of variations with Freq in
Geneva V1 measurements
271-274 F4.1 mmag e_AV1 ? Standard error on AV1
275-280 F6.3 --- phiV1 ? [0,1[ Phase of variations with Freq in
Geneva V1 measurements
281-286 F6.3 --- e_phiV1 ? Standard error on phiV1
287-292 F6.1 mmag AV *? Amplitude of variations with Freq in
Geneva V measurements
293-296 F4.1 mmag e_AV ? Standard error on AV
297-302 F6.3 --- phiV ? [0,1[ Phase of variations with Freq in
Geneva V measurements
303-308 F6.3 --- e_phiV ? Standard error on phiV
309-314 F6.1 mmag AG *? Amplitude of variations with Freq in
Geneva G measurements
315-318 F4.1 mmag e_AG ? Standard error on AG
319-324 F6.3 --- phiG ? [0,1[ Phase of variations with Freq in
Geneva G measurements
325-330 F6.3 --- e_phiG ? Standard error on phiG
331-336 F6.1 mmag AHp *? Amplitude of variations with Freq in
Hipparcos Hp measurements
337-340 F4.1 mmag e_AHp ? Standard error on AHp
341-346 F6.3 --- phiHp ? [0,1[ Phase of variations with Freq in
Hipparcos Hp measurements
347-352 F6.3 --- e_phiHp ? Standard error on phiHp
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Note on AA, CC, DD, EE, FF, GG,RST, AU, AB1, AB, AB2, AV1, AV, AG, AHp:
the amplitudes for which 0 is in the asymptotic 95% confidence
interval are given as negative values
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Acknowledgements: Peter De Cat
References:
de Cat et al., Paper I 2000A&A...355.1015D 2000A&A...355.1015D
(End) P. De Cat [Instituut voor Sterrenkunde, Leuven] 09-Oct-2002