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J/A+A/330/515 RR Lyrae parallaxes & proper motions (Fernley+ 1998)
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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)
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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
M_v_,[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 M_v_=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 M_v_,[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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 127 144 Basic data
table1.tex 113 534 LaTeX version of table1
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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.dat
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Bytes Format Units Label Explanations
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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}_cos{delta} (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)
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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): V_J_ 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
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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
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Acknowledgements: John Fernley <JAF@v3600.vilspa.esa.es>
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(End) Patricia Bauer [CDS] 11-Sep-1997