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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
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). We use the same notations as in Aerts (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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 125 17 Parameters of the targets in the sample of Aerts et al. (1999A&A...343..872A) tables.dat 366 30 Intrinsic variations (tables 2-4, 6-15)
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
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
Note (1): Note: *: confirmed SPBs known before the HIPPARCOS mission a: new spectroscopic binary b: chemically peculiar stars
Byte-by-byte Description of file: tables.dat
Bytes Format Units Label Explanations
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 <v> 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 <v> 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 <v2> 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 <v2> 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 <v2> 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 <v2> 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 <v2> 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 <v3> 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 <v3> 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 <v3> 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 <v3> 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 <v3> 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 <v3> 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
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
Acknowledgements: Peter De Cat References: de Cat et al., Paper I 2000A&A...355.1015D
(End) P. De Cat [Instituut voor Sterrenkunde, Leuven] 09-Oct-2002
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