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J/A+A/330/515       RR Lyrae parallaxes & proper motions (Fernley+ 1998)

The absolute magnitudes of RR Lyrae from HIPPARCOS parallaxes and proper motions Fernley J., Barnes T.G., Skillen I., Hawley S.L., Hanley C.J., Evans D.W., Solano E., Garrido R. <Astron. Astrophys. 330, 515 (1998)> =1998A&A...330..515F (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Parallaxes, trigonometric ; Proper motions ; Radial velocities ; Abundances, [Fe/H] Keywords: stars: variables: RR Lyraes - Galaxy: globular clusters - galaxies: Magellanic Clouds Abstract: We have used HIPPARCOS proper motions and the method of Statistical Parallax to estimate the absolute magnitude of RR Lyrae stars. In addition we used the HIPPARCOS parallax of RR Lyrae itself to determine it's absolute magnitude. These two results are in excellent agreement with each other and give a zero-point for the RR Lyrae Mv,[Fe/H] relation of 0.77±0.15 at [Fe/H]=-1.53. This zero-point is in good agreement with that obtained recently by several groups using Baade-Wesselink methods which, averaged over the results from the different groups, gives Mv=0.73±0.14 at [Fe/H]=-1.53. Taking the HIPPARCOS based zero-point and a value of 0.18±0.03 for the slope of the Mv,[Fe/H] relation from the literature we find firstly, the distance modulus of the LMC is 18.26±0.15 and secondly, the mean age of the Globular Clusters is 17.4±3.0 GYrs. These values are compared with recent estimates based on other "standard candles" that have also been calibrated with HIPPARCOS data. It is clear that, in addition to astrophysical problems, there are also problems in the application of HIPPARCOS data that are not yet fully understood. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1 127 144 Basic data table1.tex 113 534 LaTeX version of table1
See also: III/176 : RR Lyrae Metallicities (Layden 1994) VI/45 : A bibliographical catalogue of RR Lyrae stars (Heck 1988) Byte-by-byte Description of file: table1
Bytes Format Units Label Explanations
1- 9 A9 --- Star Star name 10 A1 --- n_Star [c] c for RRc, else RRab (1) 12- 19 F8.6 d Per Period (2) 21- 25 F5.2 mas plx Trigonometric parallax (3) 27- 30 F4.2 mas e_plx rms uncertainty on plx 32- 38 F7.2 mas/yr pmRA Proper motion in RA, mu_alpha_cosdelta (3) 40- 43 F4.2 mas/yr e_pmRA rms uncertainty on pmRA 45- 51 F7.2 mas/yr pmDE Proper motion in DE, mu_delta_ (3) 53- 57 F5.2 mas/yr e_pmDE rms uncertainty on pmDE 59- 63 F5.2 mag Vmag V_J_ magnitude (4) 65- 69 F5.2 mag Kmag ? K magnitude (5) 71 I1 --- r_Kmag ? Reference for K magnitudes (5) 73- 77 F5.3 mag E(B-V) Reddening (6) 79 I1 --- r_E(B-V) Reference for E(B-V) (6) 81- 84 I4 km/s RV Systemic radial velocity (7) 86- 87 I2 km/s e_RV rms uncertainty on RV (7) 89-103 A15 --- r_RV Reference for RV 105-109 F5.2 [Sun] [Fe/H] Metallicity (8) 111-125 A15 --- r_[Fe/H] Reference for [Fe/H] (8)
Note (1): The identification of the 'c' types is from the Fourier components as discussed in section 2.3 Note (2): Periods were initially from the GCVS (Kholopov et al. 1985, Cat. II/139)) and then refined using the HIPPARCOS photometry as discussed in section 2.1 Note (3): Trigonometric Parallaxes and proper motions (and their errors) are from HIPPARCOS Note (4): VJ magnitudes are intensity mean magnitudes derived from the HIPPARCOS photometry using the procedures described in section 2.1. The error on these mean magnitudes is typically ±0.02 Note (5): K magnitudes are from (1) the Baade-Wesselink analyses listed in Skillen et al. (1993MNRAS.265..301S) (2) Fernley, Skillen and Burki (1993A&AS...97..815F) (3) Unpublished. Typically these have uncertainties of ±0.04 Note (6): E(B-V) is from (1) Burstein and Heiles (1982AJ.....87.1165B) (2) Using the Log(P)-(V-K) relations discussed in Section 2.2. Uncertainties on these reddenings are ±0.015 for Burstein and Heiles and ±0.03 for those derived from (V-K). Note (7): The sources of the data are as follows: 1: Skillen et al., 1993MNRAS.265..301S 2: Fernley et al., 1990MNRAS.247..287F 3: Meylan et al., 1986A&AS...64...25M 4: Liu and Janes 1990, 1990ApJ...354..273L 5: Jones et al., 1988ApJ...332..206J 6: Carrillo et al., 1995A&AS..113..483C, Cat. J/A+AS/113/483 7: Cacciari et al., 1987A&AS...69..135C 8: Clementini et al., 1990A&AS...85..865C 9: Solano et al., 1997A&AS..125..321S, Cat. J/A+AS/125/321 10: Fernley and Barnes, 1997A&AS..125..313F, Cat. J/A+AS/125/313 11: Hawley and Barnes, 1985PASP...97..551H 12: Fernley et al., 1993A&AS...97..815F 13: Layden, 1994AJ....108.1016L, Cat. J/AJ/108/1016 14: Woolley and Aly, 1966RGOB..114..259W 15: Kinman, 1961RGOB...37..151K 16: Clube, Evans and Jones, 1969MmRAS..72..101C 17: Breger, 1964MNSSA..23..112B 18: Notni, 1956MiJen..26....1N 19: Joy, 1938PASP...50..302J, 1950PASP...62...60J, 1955PASP...67..420J Note (8): [Fe/H] use the relation [Fe/H]=-0.13-0.195{DELTA}S from Fernley and Barnes (1997, A&AS, in press). Typically the error on these abundances is ±0.15 dex. Sources of data are as follows: (1) Suntzeff, Kraft and Kinman, 1991ApJ...367..528S (2) Fernley and Barnes, 1997, A&AS, in press (3) Solano et al., 1997, A&AS, in press (4) Lambert et al., 1996ApJS..103..183L (5) Clementini et al., 1995AJ....110.2319C, Cat. J/AJ/110/2319 (6) Layden, 1994AJ....108.1016L, Cat. J/AJ/108/1016 (7) Kemper, 1982AJ.....87.1395K (8) Butler, 1975ApJ...200...68B (unless superseded by ref 1) (9) Preston, 1959ApJ...130..507P (unless superseded by ref 1) (10) Kinman and Caretta, 1992PASP..104..111K (11) Smith, 1990PASP..102..124S (12) Clementini et al., 1991AJ....101.2168C (13) Kinman, 1961RGOB...37..151K (14) Clube, Evans and Jones, 1969MmRAS..72..101C
Individual notes: Of the 180 stars classified by HIPPARCOS as RR Lyraes and observed by the satellite the following stars were removed: CH AQL: No metallicity IN ARA: Poor quality HIPPARCOS data (like RW COL) BH AUR: No reddening BB CMI: Ecl. Var. (Schmidt et al., 1995AJ....109.1239S) V363 CAS: Fourier Coefficient R(21) is unusual - Anom. Ceph (see section 2.3) V753 CEN: Period too short (0.221 days) EZ CEP: Poor quality HIPPARCOS data (like RW COL) XZ CET: Fourier Coefficient R(21) is unusual - Anom. Ceph (see section 2.3) RW COL: HIPPARCOS data are Poor quality (light curve has a lot of scatter and Trig Parallax and Proper Motion have large errors) V1719 CYG: Long period Delta Scuti (Fernley and Barnes, 1997, A&AS, in press) VZ DRA: No metallicity BX DRA: Ecl. Var. (Schmidt et al., 1995AJ....109.1239S) XZ GRU: Period too long (0.883 days) LS HER: Period too short (0.231 days) SZ HYA: Poor quality HIPPARCOS data (like RW COL) BI HYA: Constant V mag from HIPPARCOS photometry ET HYA: Both constant V mag from HIPPARCOS and constant radial velocity from spectra (Fernley and Barnes, 1997, A&AS, in press) CZ LAC: Poor quality HIPPARCOS data (like RW COL) CW LUP: Both constant V mag from HIPPARCOS and constant radial velocity from spectra (Solano et al., 1997, A&AS, in press) TV LYN: Period too short (0.241 days) VY NOR: Poor quality HIPPARCOS data (like RW COL) V429 ORI: Both constant V mag from HIPPARCOS and constant radial velocity from spectra (Fernley and Barnes, 1997, A&AS, in press) IV PAV: Period too short (0.203 days) KN PER: Ecl. Var (Schmidt, 1991AJ....102.1766S) ST PIC: No metallicity or radial velocity SS PSC: Long period Delta Scuti (Fernley and Barnes, 1997, A&AS, in press) IU PUP: Constant V mag from HIPPARCOS photometry KZ PUP: Period too long (2.018 days) V2232 SGR: Poor quality HIPPARCOS data (like RW COL) V494 SCO: No Reddening V690 SCO: No Reddening UY SCL: Period too short (0.182 days) AR SER: Fourier Coefficient R(21) is unusual - Anom. Ceph (see section 2.3) CD VEL: No metallicity or radial velocity BB VIR: Photometric evidence for HB Companion (Fernley, 1993Obs...113..197F) NSV5394: Constant V mag from HIPPARCOS photometry Acknowledgements: John Fernley
(End) Patricia Bauer [CDS] 11-Sep-1997
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